Search bar for issues/pulls (#530)

.gitignore

@@ -41,5 +41,6 @@ coverage.out
 /dist
 /custom
 /data
+/indexers
 /log
 /public/img/avatar

conf/app.ini

@@ -158,6 +158,10 @@ SSL_MODE = disable
 ; For "sqlite3" and "tidb", use absolute path when you start as service
 PATH = data/gitea.db
 
+[indexer]
+ISSUE_INDEXER_PATH = indexers/issues.bleve
+UPDATE_BUFFER_LEN = 20
+
 [admin]
 
 [security]

models/issue.go

@@ -17,6 +17,7 @@ import (
 	"code.gitea.io/gitea/modules/base"
 	"code.gitea.io/gitea/modules/log"
 	"code.gitea.io/gitea/modules/setting"
+	"code.gitea.io/gitea/modules/util"
 )
 
 var (
@@ -451,8 +452,11 @@ func (issue *Issue) ReadBy(userID int64) error {
 }
 
 func updateIssueCols(e Engine, issue *Issue, cols ...string) error {
-	_, err := e.Id(issue.ID).Cols(cols...).Update(issue)
+	if _, err := e.Id(issue.ID).Cols(cols...).Update(issue); err != nil {
 		return err
+	}
+	UpdateIssueIndexer(issue)
+	return nil
 }
 
 // UpdateIssueCols only updates values of specific columns for given issue.
@@ -733,6 +737,8 @@ func newIssue(e *xorm.Session, opts NewIssueOptions) (err error) {
 		return err
 	}
 
+	UpdateIssueIndexer(opts.Issue)
+
 	if len(opts.Attachments) > 0 {
 		attachments, err := getAttachmentsByUUIDs(e, opts.Attachments)
 		if err != nil {
@@ -865,10 +871,11 @@ type IssuesOptions struct {
 	MilestoneID int64
 	RepoIDs     []int64
 	Page        int
-	IsClosed    bool
+	IsClosed    util.OptionalBool
-	IsPull      bool
+	IsPull      util.OptionalBool
 	Labels      string
 	SortType    string
+	IssueIDs    []int64
 }
 
 // sortIssuesSession sort an issues-related session based on the provided
@@ -894,11 +901,23 @@ func sortIssuesSession(sess *xorm.Session, sortType string) {
 
 // Issues returns a list of issues by given conditions.
 func Issues(opts *IssuesOptions) ([]*Issue, error) {
-	if opts.Page <= 0 {
+	var sess *xorm.Session
-		opts.Page = 1
+	if opts.Page >= 0 {
+		var start int
+		if opts.Page == 0 {
+			start = 0
+		} else {
+			start = (opts.Page - 1) * setting.UI.IssuePagingNum
+		}
+		sess = x.Limit(setting.UI.IssuePagingNum, start)
+	} else {
+		sess = x.NewSession()
+		defer sess.Close()
 	}
 
-	sess := x.Limit(setting.UI.IssuePagingNum, (opts.Page-1)*setting.UI.IssuePagingNum)
+	if len(opts.IssueIDs) > 0 {
+		sess.In("issue.id", opts.IssueIDs)
+	}
 
 	if opts.RepoID > 0 {
 		sess.And("issue.repo_id=?", opts.RepoID)
@@ -906,7 +925,13 @@ func Issues(opts *IssuesOptions) ([]*Issue, error) {
 		// In case repository IDs are provided but actually no repository has issue.
 		sess.In("issue.repo_id", opts.RepoIDs)
 	}
-	sess.And("issue.is_closed=?", opts.IsClosed)
+
+	switch opts.IsClosed {
+	case util.OptionalBoolTrue:
+		sess.And("issue.is_closed=true")
+	case util.OptionalBoolFalse:
+		sess.And("issue.is_closed=false")
+	}
 
 	if opts.AssigneeID > 0 {
 		sess.And("issue.assignee_id=?", opts.AssigneeID)
@@ -926,7 +951,12 @@ func Issues(opts *IssuesOptions) ([]*Issue, error) {
 		sess.And("issue.milestone_id=?", opts.MilestoneID)
 	}
 
-	sess.And("issue.is_pull=?", opts.IsPull)
+	switch opts.IsPull {
+	case util.OptionalBoolTrue:
+		sess.And("issue.is_pull=true")
+	case util.OptionalBoolFalse:
+		sess.And("issue.is_pull=false")
+	}
 
 	sortIssuesSession(sess, opts.SortType)
 
@@ -1168,10 +1198,11 @@ type IssueStatsOptions struct {
 	MentionedID int64
 	PosterID    int64
 	IsPull      bool
+	IssueIDs    []int64
 }
 
 // GetIssueStats returns issue statistic information by given conditions.
-func GetIssueStats(opts *IssueStatsOptions) *IssueStats {
+func GetIssueStats(opts *IssueStatsOptions) (*IssueStats, error) {
 	stats := &IssueStats{}
 
 	countSession := func(opts *IssueStatsOptions) *xorm.Session {
@@ -1179,6 +1210,10 @@ func GetIssueStats(opts *IssueStatsOptions) *IssueStats {
 			Where("issue.repo_id = ?", opts.RepoID).
 			And("is_pull = ?", opts.IsPull)
 
+		if len(opts.IssueIDs) > 0 {
+			sess.In("issue.id", opts.IssueIDs)
+		}
+
 		if len(opts.Labels) > 0 && opts.Labels != "0" {
 			labelIDs, err := base.StringsToInt64s(strings.Split(opts.Labels, ","))
 			if err != nil {
@@ -1210,13 +1245,20 @@ func GetIssueStats(opts *IssueStatsOptions) *IssueStats {
 		return sess
 	}
 
-	stats.OpenCount, _ = countSession(opts).
+	var err error
+	stats.OpenCount, err = countSession(opts).
 		And("is_closed = ?", false).
 		Count(&Issue{})
-	stats.ClosedCount, _ = countSession(opts).
+	if err != nil {
+		return nil, err
+	}
+	stats.ClosedCount, err = countSession(opts).
 		And("is_closed = ?", true).
 		Count(&Issue{})
-	return stats
+	if err != nil {
+		return nil, err
+	}
+	return stats, nil
 }
 
 // GetUserIssueStats returns issue statistic information for dashboard by given conditions.
@@ -1294,7 +1336,11 @@ func GetRepoIssueStats(repoID, uid int64, filterMode int, isPull bool) (numOpen
 
 func updateIssue(e Engine, issue *Issue) error {
 	_, err := e.Id(issue.ID).AllCols().Update(issue)
+	if err != nil {
 		return err
+	}
+	UpdateIssueIndexer(issue)
+	return nil
 }
 
 // UpdateIssue updates all fields of given issue.

models/issue_comment.go

@@ -454,28 +454,20 @@ func UpdateComment(c *Comment) error {
 	return err
 }
 
-// DeleteCommentByID deletes the comment by given ID.
+// DeleteComment deletes the comment
-func DeleteCommentByID(id int64) error {
+func DeleteComment(comment *Comment) error {
-	comment, err := GetCommentByID(id)
-	if err != nil {
-		if IsErrCommentNotExist(err) {
-			return nil
-		}
-		return err
-	}
-
 	sess := x.NewSession()
 	defer sessionRelease(sess)
-	if err = sess.Begin(); err != nil {
+	if err := sess.Begin(); err != nil {
 		return err
 	}
 
-	if _, err = sess.Id(comment.ID).Delete(new(Comment)); err != nil {
+	if _, err := sess.Id(comment.ID).Delete(new(Comment)); err != nil {
 		return err
 	}
 
 	if comment.Type == CommentTypeComment {
-		if _, err = sess.Exec("UPDATE `issue` SET num_comments = num_comments - 1 WHERE id = ?", comment.IssueID); err != nil {
+		if _, err := sess.Exec("UPDATE `issue` SET num_comments = num_comments - 1 WHERE id = ?", comment.IssueID); err != nil {
 			return err
 		}
 	}

models/issue_indexer.go

@@ -0,0 +1,183 @@
+// Copyright 2017 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package models
+
+import (
+	"fmt"
+	"os"
+	"strconv"
+	"strings"
+
+	"code.gitea.io/gitea/modules/log"
+	"code.gitea.io/gitea/modules/setting"
+	"code.gitea.io/gitea/modules/util"
+	"github.com/blevesearch/bleve"
+	"github.com/blevesearch/bleve/analysis/analyzer/simple"
+	"github.com/blevesearch/bleve/search/query"
+)
+
+// issueIndexerUpdateQueue queue of issues that need to be updated in the issues
+// indexer
+var issueIndexerUpdateQueue chan *Issue
+
+// issueIndexer (thread-safe) index for searching issues
+var issueIndexer bleve.Index
+
+// issueIndexerData data stored in the issue indexer
+type issueIndexerData struct {
+	ID     int64
+	RepoID int64
+
+	Title   string
+	Content string
+}
+
+// numericQuery an numeric-equality query for the given value and field
+func numericQuery(value int64, field string) *query.NumericRangeQuery {
+	f := float64(value)
+	tru := true
+	q := bleve.NewNumericRangeInclusiveQuery(&f, &f, &tru, &tru)
+	q.SetField(field)
+	return q
+}
+
+// SearchIssuesByKeyword searches for issues by given conditions.
+// Returns the matching issue IDs
+func SearchIssuesByKeyword(repoID int64, keyword string) ([]int64, error) {
+	fields := strings.Fields(strings.ToLower(keyword))
+	indexerQuery := bleve.NewConjunctionQuery(
+		numericQuery(repoID, "RepoID"),
+		bleve.NewDisjunctionQuery(
+			bleve.NewPhraseQuery(fields, "Title"),
+			bleve.NewPhraseQuery(fields, "Content"),
+		))
+	search := bleve.NewSearchRequestOptions(indexerQuery, 2147483647, 0, false)
+	search.Fields = []string{"ID"}
+
+	result, err := issueIndexer.Search(search)
+	if err != nil {
+		return nil, err
+	}
+
+	issueIDs := make([]int64, len(result.Hits))
+	for i, hit := range result.Hits {
+		issueIDs[i] = int64(hit.Fields["ID"].(float64))
+	}
+	return issueIDs, nil
+}
+
+// InitIssueIndexer initialize issue indexer
+func InitIssueIndexer() {
+	_, err := os.Stat(setting.Indexer.IssuePath)
+	if err != nil {
+		if os.IsNotExist(err) {
+			if err = createIssueIndexer(); err != nil {
+				log.Fatal(4, "CreateIssuesIndexer: %v", err)
+			}
+			if err = populateIssueIndexer(); err != nil {
+				log.Fatal(4, "PopulateIssuesIndex: %v", err)
+			}
+		} else {
+			log.Fatal(4, "InitIssuesIndexer: %v", err)
+		}
+	} else {
+		issueIndexer, err = bleve.Open(setting.Indexer.IssuePath)
+		if err != nil {
+			log.Fatal(4, "InitIssuesIndexer, open index: %v", err)
+		}
+	}
+	issueIndexerUpdateQueue = make(chan *Issue, setting.Indexer.UpdateQueueLength)
+	go processIssueIndexerUpdateQueue()
+	// TODO close issueIndexer when Gitea closes
+}
+
+// createIssueIndexer create an issue indexer if one does not already exist
+func createIssueIndexer() error {
+	mapping := bleve.NewIndexMapping()
+	docMapping := bleve.NewDocumentMapping()
+
+	docMapping.AddFieldMappingsAt("ID", bleve.NewNumericFieldMapping())
+	docMapping.AddFieldMappingsAt("RepoID", bleve.NewNumericFieldMapping())
+
+	textFieldMapping := bleve.NewTextFieldMapping()
+	textFieldMapping.Analyzer = simple.Name
+	docMapping.AddFieldMappingsAt("Title", textFieldMapping)
+	docMapping.AddFieldMappingsAt("Content", textFieldMapping)
+
+	mapping.AddDocumentMapping("issues", docMapping)
+
+	var err error
+	issueIndexer, err = bleve.New(setting.Indexer.IssuePath, mapping)
+	return err
+}
+
+// populateIssueIndexer populate the issue indexer with issue data
+func populateIssueIndexer() error {
+	for page := 1; ; page++ {
+		repos, err := Repositories(&SearchRepoOptions{
+			Page:     page,
+			PageSize: 10,
+		})
+		if err != nil {
+			return fmt.Errorf("Repositories: %v", err)
+		}
+		if len(repos) == 0 {
+			return nil
+		}
+		batch := issueIndexer.NewBatch()
+		for _, repo := range repos {
+			issues, err := Issues(&IssuesOptions{
+				RepoID:   repo.ID,
+				IsClosed: util.OptionalBoolNone,
+				IsPull:   util.OptionalBoolNone,
+				Page:     -1, // do not page
+			})
+			if err != nil {
+				return fmt.Errorf("Issues: %v", err)
+			}
+			for _, issue := range issues {
+				err = batch.Index(issue.indexUID(), issue.issueData())
+				if err != nil {
+					return fmt.Errorf("batch.Index: %v", err)
+				}
+			}
+		}
+		if err = issueIndexer.Batch(batch); err != nil {
+			return fmt.Errorf("index.Batch: %v", err)
+		}
+	}
+}
+
+func processIssueIndexerUpdateQueue() {
+	for {
+		select {
+		case issue := <-issueIndexerUpdateQueue:
+			if err := issueIndexer.Index(issue.indexUID(), issue.issueData()); err != nil {
+				log.Error(4, "issuesIndexer.Index: %v", err)
+			}
+		}
+	}
+}
+
+// indexUID a unique identifier for an issue used in full-text indices
+func (issue *Issue) indexUID() string {
+	return strconv.FormatInt(issue.ID, 36)
+}
+
+func (issue *Issue) issueData() *issueIndexerData {
+	return &issueIndexerData{
+		ID:      issue.ID,
+		RepoID:  issue.RepoID,
+		Title:   issue.Title,
+		Content: issue.Content,
+	}
+}
+
+// UpdateIssueIndexer add/update an issue to the issue indexer
+func UpdateIssueIndexer(issue *Issue) {
+	go func() {
+		issueIndexerUpdateQueue <- issue
+	}()
+}

models/models.go

@@ -138,6 +138,10 @@ func LoadConfigs() {
 	}
 	DbCfg.SSLMode = sec.Key("SSL_MODE").String()
 	DbCfg.Path = sec.Key("PATH").MustString("data/gitea.db")
+
+	sec = setting.Cfg.Section("indexer")
+	setting.Indexer.IssuePath = sec.Key("ISSUE_INDEXER_PATH").MustString("indexers/issues.bleve")
+	setting.Indexer.UpdateQueueLength = sec.Key("UPDATE_BUFFER_LEN").MustInt(20)
 }
 
 // parsePostgreSQLHostPort parses given input in various forms defined in

modules/indexer/indexer.go

@@ -0,0 +1,14 @@
+// Copyright 2016 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package indexer
+
+import (
+	"code.gitea.io/gitea/models"
+)
+
+// NewContext start indexer service
+func NewContext() {
+	models.InitIssueIndexer()
+}

modules/setting/setting.go

@@ -123,6 +123,12 @@ var (
 	UsePostgreSQL bool
 	UseTiDB       bool
 
+	// Indexer settings
+	Indexer struct {
+		IssuePath         string
+		UpdateQueueLength int
+	}
+
 	// Webhook settings
 	Webhook = struct {
 		QueueLength    int

modules/util/util.go

@@ -0,0 +1,25 @@
+// Copyright 2017 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package util
+
+// OptionalBool a boolean that can be "null"
+type OptionalBool byte
+
+const (
+	// OptionalBoolNone a "null" boolean value
+	OptionalBoolNone = iota
+	// OptionalBoolTrue a "true" boolean value
+	OptionalBoolTrue
+	// OptionalBoolFalse a "false" boolean value
+	OptionalBoolFalse
+)
+
+// OptionalBoolOf get the corresponding OptionalBool of a bool
+func OptionalBoolOf(b bool) OptionalBool {
+	if b {
+		return OptionalBoolTrue
+	}
+	return OptionalBoolFalse
+}

public/css/index.css

@@ -2926,6 +2926,10 @@ footer .ui.language .menu {
   width: 16px;
   text-align: center;
 }
+.navbar {
+  display: flex;
+  justify-content: space-between;
+}
 .ui.repository.list .item {
   padding-bottom: 25px;
 }

routers/api/v1/repo/issue.go

@@ -13,14 +13,16 @@ import (
 	"code.gitea.io/gitea/models"
 	"code.gitea.io/gitea/modules/context"
 	"code.gitea.io/gitea/modules/setting"
+	"code.gitea.io/gitea/modules/util"
 )
 
 // ListIssues list the issues of a repository
 func ListIssues(ctx *context.APIContext) {
+	isClosed := ctx.Query("state") == "closed"
 	issueOpts := models.IssuesOptions{
 		RepoID:   ctx.Repo.Repository.ID,
 		Page:     ctx.QueryInt("page"),
-		IsClosed: ctx.Query("state") == "closed",
+		IsClosed: util.OptionalBoolOf(isClosed),
 	}
 
 	issues, err := models.Issues(&issueOpts)
@@ -29,7 +31,7 @@ func ListIssues(ctx *context.APIContext) {
 		return
 	}
 	if ctx.Query("state") == "all" {
-		issueOpts.IsClosed = !issueOpts.IsClosed
+		issueOpts.IsClosed = util.OptionalBoolOf(!isClosed)
 		tempIssues, err := models.Issues(&issueOpts)
 		if err != nil {
 			ctx.Error(500, "Issues", err)

routers/api/v1/repo/issue_comment.go

@@ -125,7 +125,7 @@ func DeleteIssueComment(ctx *context.APIContext) {
 		return
 	}
 
-	if err = models.DeleteCommentByID(comment.ID); err != nil {
+	if err = models.DeleteComment(comment); err != nil {
 		ctx.Error(500, "DeleteCommentByID", err)
 		return
 	}

routers/init.go

@@ -18,6 +18,7 @@ import (
 	"code.gitea.io/gitea/modules/setting"
 	"code.gitea.io/gitea/modules/ssh"
 	macaron "gopkg.in/macaron.v1"
+	"code.gitea.io/gitea/modules/indexer"
 )
 
 func checkRunMode() {
@@ -36,6 +37,7 @@ func checkRunMode() {
 func NewServices() {
 	setting.NewServices()
 	mailer.NewContext()
+	indexer.NewContext()
 }
 
 // GlobalInit is for global configuration reload-able.

routers/repo/issue.go

@@ -5,6 +5,7 @@
 package repo
 
 import (
+	"bytes"
 	"errors"
 	"fmt"
 	"io"
@@ -25,6 +26,7 @@ import (
 	"code.gitea.io/gitea/modules/markdown"
 	"code.gitea.io/gitea/modules/notification"
 	"code.gitea.io/gitea/modules/setting"
+	"code.gitea.io/gitea/modules/util"
 )
 
 const (
@@ -158,20 +160,39 @@ func Issues(ctx *context.Context) {
 	milestoneID := ctx.QueryInt64("milestone")
 	isShowClosed := ctx.Query("state") == "closed"
 
+	keyword := ctx.Query("q")
+	if bytes.Contains([]byte(keyword), []byte{0x00}) {
+		keyword = ""
+	}
+
+	var issueIDs []int64
+	var err error
+	if len(keyword) > 0 {
+		issueIDs, err = models.SearchIssuesByKeyword(repo.ID, keyword)
+		if len(issueIDs) == 0 {
+			forceEmpty = true
+		}
+	}
+
 	var issueStats *models.IssueStats
 	if forceEmpty {
 		issueStats = &models.IssueStats{}
 	} else {
-		issueStats = models.GetIssueStats(&models.IssueStatsOptions{
+		var err error
+		issueStats, err = models.GetIssueStats(&models.IssueStatsOptions{
 			RepoID:      repo.ID,
 			Labels:      selectLabels,
 			MilestoneID: milestoneID,
 			AssigneeID:  assigneeID,
 			MentionedID: mentionedID,
 			IsPull:      isPullList,
+			IssueIDs:    issueIDs,
 		})
+		if err != nil {
+			ctx.Error(500, "GetSearchIssueStats")
+			return
+		}
 	}
-
 	page := ctx.QueryInt("page")
 	if page <= 1 {
 		page = 1
@@ -190,7 +211,6 @@ func Issues(ctx *context.Context) {
 	if forceEmpty {
 		issues = []*models.Issue{}
 	} else {
-		var err error
 		issues, err = models.Issues(&models.IssuesOptions{
 			AssigneeID:  assigneeID,
 			RepoID:      repo.ID,
@@ -198,10 +218,11 @@ func Issues(ctx *context.Context) {
 			MentionedID: mentionedID,
 			MilestoneID: milestoneID,
 			Page:        pager.Current(),
-			IsClosed:    isShowClosed,
+			IsClosed:    util.OptionalBoolOf(isShowClosed),
-			IsPull:      isPullList,
+			IsPull:      util.OptionalBoolOf(isPullList),
 			Labels:      selectLabels,
 			SortType:    sortType,
+			IssueIDs:    issueIDs,
 		})
 		if err != nil {
 			ctx.Handle(500, "Issues", err)
@@ -258,6 +279,7 @@ func Issues(ctx *context.Context) {
 	ctx.Data["MilestoneID"] = milestoneID
 	ctx.Data["AssigneeID"] = assigneeID
 	ctx.Data["IsShowClosed"] = isShowClosed
+	ctx.Data["Keyword"] = keyword
 	if isShowClosed {
 		ctx.Data["State"] = "closed"
 	} else {
@@ -934,7 +956,7 @@ func DeleteComment(ctx *context.Context) {
 		return
 	}
 
-	if err = models.DeleteCommentByID(comment.ID); err != nil {
+	if err = models.DeleteComment(comment); err != nil {
 		ctx.Handle(500, "DeleteCommentByID", err)
 		return
 	}

routers/user/home.go

@@ -15,6 +15,7 @@ import (
 	"code.gitea.io/gitea/modules/base"
 	"code.gitea.io/gitea/modules/context"
 	"code.gitea.io/gitea/modules/setting"
+	"code.gitea.io/gitea/modules/util"
 )
 
 const (
@@ -277,8 +278,8 @@ func Issues(ctx *context.Context) {
 		PosterID:   posterID,
 		RepoIDs:    repoIDs,
 		Page:       page,
-		IsClosed:   isShowClosed,
+		IsClosed:   util.OptionalBoolOf(isShowClosed),
-		IsPull:     isPullList,
+		IsPull:     util.OptionalBoolOf(isPullList),
 		SortType:   sortType,
 	})
 	if err != nil {

templates/repo/issue/list.tmpl

@@ -4,6 +4,7 @@
 	<div class="ui container">
 		<div class="navbar">
 			{{template "repo/issue/navbar" .}}
+			{{template "repo/issue/search" .}}
 			<div class="ui right">
 				{{if .PageIsIssueList}}
 					<a class="ui green button" href="{{.RepoLink}}/issues/new">{{.i18n.Tr "repo.issues.new"}}</a>
@@ -14,11 +15,11 @@
 		</div>
 		<div class="ui divider"></div>
 		<div class="ui tiny basic status buttons">
-			<a class="ui {{if not .IsShowClosed}}green active{{end}} basic button" href="{{$.Link}}?type={{$.ViewType}}&sort={{$.SortType}}&state=open&labels={{.SelectLabels}}&milestone={{.MilestoneID}}&assignee={{.AssigneeID}}">
+			<a class="ui {{if not .IsShowClosed}}green active{{end}} basic button" href="{{$.Link}}?q={{$.Keyword}}&type={{$.ViewType}}&sort={{$.SortType}}&state=open&labels={{.SelectLabels}}&milestone={{.MilestoneID}}&assignee={{.AssigneeID}}">
 				<i class="octicon octicon-issue-opened"></i>
 				{{.i18n.Tr "repo.issues.open_tab" .IssueStats.OpenCount}}
 			</a>
-			<a class="ui {{if .IsShowClosed}}red active{{end}} basic button" href="{{$.Link}}?type={{.ViewType}}&sort={{$.SortType}}&state=closed&labels={{.SelectLabels}}&milestone={{.MilestoneID}}&assignee={{.AssigneeID}}">
+			<a class="ui {{if .IsShowClosed}}red active{{end}} basic button" href="{{$.Link}}?q={{$.Keyword}}&type={{.ViewType}}&sort={{$.SortType}}&state=closed&labels={{.SelectLabels}}&milestone={{.MilestoneID}}&assignee={{.AssigneeID}}">
 				<i class="octicon octicon-issue-closed"></i>
 				{{.i18n.Tr "repo.issues.close_tab" .IssueStats.ClosedCount}}
 			</a>
@@ -31,9 +32,9 @@
 					<i class="dropdown icon"></i>
 				</span>
 				<div class="menu">
-					<a class="item" href="{{$.Link}}?type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&milestone={{$.MilestoneID}}&assignee={{$.AssigneeID}}">{{.i18n.Tr "repo.issues.filter_label_no_select"}}</a>
+					<a class="item" href="{{$.Link}}?q={{$.Keyword}}&type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&milestone={{$.MilestoneID}}&assignee={{$.AssigneeID}}">{{.i18n.Tr "repo.issues.filter_label_no_select"}}</a>
 					{{range .Labels}}
-						<a class="item" href="{{$.Link}}?type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels={{.ID}}&milestone={{$.MilestoneID}}&assignee={{$.AssigneeID}}"><span class="octicon {{if eq $.SelectLabels .ID}}octicon-check{{end}}"></span><span class="label color" style="background-color: {{.Color}}"></span> {{.Name}}</a>
+						<a class="item" href="{{$.Link}}?q={{$.Keyword}}&type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels={{.ID}}&milestone={{$.MilestoneID}}&assignee={{$.AssigneeID}}"><span class="octicon {{if eq $.SelectLabels .ID}}octicon-check{{end}}"></span><span class="label color" style="background-color: {{.Color}}"></span> {{.Name}}</a>
 					{{end}}
 				</div>
 			</div>
@@ -45,7 +46,7 @@
 					<i class="dropdown icon"></i>
 				</span>
 				<div class="menu">
-					<a class="item" href="{{$.Link}}?type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels={{.SelectLabels}}&assignee={{$.AssigneeID}}">{{.i18n.Tr "repo.issues.filter_milestone_no_select"}}</a>
+					<a class="item" href="{{$.Link}}?q={{$.Keyword}}&type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels={{.SelectLabels}}&assignee={{$.AssigneeID}}">{{.i18n.Tr "repo.issues.filter_milestone_no_select"}}</a>
 					{{range .Milestones}}
 						<a class="{{if eq $.MilestoneID .ID}}active selected{{end}} item" href="{{$.Link}}?type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels={{$.SelectLabels}}&milestone={{.ID}}&assignee={{$.AssigneeID}}">{{.Name}}</a>
 					{{end}}
@@ -59,7 +60,7 @@
 					<i class="dropdown icon"></i>
 				</span>
 				<div class="menu">
-					<a class="item" href="{{$.Link}}?type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}">{{.i18n.Tr "repo.issues.filter_assginee_no_select"}}</a>
+					<a class="item" href="{{$.Link}}?q={{$.Keyword}}&type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}">{{.i18n.Tr "repo.issues.filter_assginee_no_select"}}</a>
 					{{range .Assignees}}
 						<a class="{{if eq $.AssigneeID .ID}}active selected{{end}} item" href="{{$.Link}}?type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels={{$.SelectLabels}}&milestone={{$.MilestoneID}}&assignee={{.ID}}"><img src="{{.RelAvatarLink}}"> {{.Name}}</a>
 					{{end}}
@@ -73,10 +74,10 @@
 					<i class="dropdown icon"></i>
 				</span>
 				<div class="menu">
-					<a class="{{if eq .ViewType "all"}}active{{end}} item" href="{{$.Link}}?type=all&sort={{$.SortType}}&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}&assignee={{$.AssigneeID}}">{{.i18n.Tr "repo.issues.filter_type.all_issues"}}</a>
+					<a class="{{if eq .ViewType "all"}}active{{end}} item" href="{{$.Link}}?q={{$.Keyword}}&type=all&sort={{$.SortType}}&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}&assignee={{$.AssigneeID}}">{{.i18n.Tr "repo.issues.filter_type.all_issues"}}</a>
-					<a class="{{if eq .ViewType "assigned"}}active{{end}} item" href="{{$.Link}}?type=assigned&sort={{$.SortType}}&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}&assignee={{$.AssigneeID}}">{{.i18n.Tr "repo.issues.filter_type.assigned_to_you"}}</a>
+					<a class="{{if eq .ViewType "assigned"}}active{{end}} item" href="{{$.Link}}?q={{$.Keyword}}&type=assigned&sort={{$.SortType}}&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}&assignee={{$.AssigneeID}}">{{.i18n.Tr "repo.issues.filter_type.assigned_to_you"}}</a>
-					<a class="{{if eq .ViewType "created_by"}}active{{end}} item" href="{{$.Link}}?type=created_by&sort={{$.SortType}}&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}&assignee={{$.AssigneeID}}">{{.i18n.Tr "repo.issues.filter_type.created_by_you"}}</a>
+					<a class="{{if eq .ViewType "created_by"}}active{{end}} item" href="{{$.Link}}?q={{$.Keyword}}&type=created_by&sort={{$.SortType}}&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}&assignee={{$.AssigneeID}}">{{.i18n.Tr "repo.issues.filter_type.created_by_you"}}</a>
-					<a class="{{if eq .ViewType "mentioned"}}active{{end}} item" href="{{$.Link}}?type=mentioned&sort={{$.SortType}}&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}&assignee={{$.AssigneeID}}">{{.i18n.Tr "repo.issues.filter_type.mentioning_you"}}</a>
+					<a class="{{if eq .ViewType "mentioned"}}active{{end}} item" href="{{$.Link}}?q={{$.Keyword}}&type=mentioned&sort={{$.SortType}}&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}&assignee={{$.AssigneeID}}">{{.i18n.Tr "repo.issues.filter_type.mentioning_you"}}</a>
 				</div>
 			</div>
 
@@ -87,12 +88,12 @@
 					<i class="dropdown icon"></i>
 				</span>
 				<div class="menu">
-					<a class="{{if or (eq .SortType "latest") (not .SortType)}}active{{end}} item" href="{{$.Link}}?type={{$.ViewType}}&sort=latest&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}&assignee={{$.AssigneeID}}">{{.i18n.Tr "repo.issues.filter_sort.latest"}}</a>
+					<a class="{{if or (eq .SortType "latest") (not .SortType)}}active{{end}} item" href="{{$.Link}}?q={{$.Keyword}}&type={{$.ViewType}}&sort=latest&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}&assignee={{$.AssigneeID}}">{{.i18n.Tr "repo.issues.filter_sort.latest"}}</a>
-					<a class="{{if eq .SortType "oldest"}}active{{end}} item" href="{{$.Link}}?type={{$.ViewType}}&sort=oldest&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}&assignee={{$.AssigneeID}}">{{.i18n.Tr "repo.issues.filter_sort.oldest"}}</a>
+					<a class="{{if eq .SortType "oldest"}}active{{end}} item" href="{{$.Link}}?q={{$.Keyword}}&type={{$.ViewType}}&sort=oldest&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}&assignee={{$.AssigneeID}}">{{.i18n.Tr "repo.issues.filter_sort.oldest"}}</a>
-					<a class="{{if eq .SortType "recentupdate"}}active{{end}} item" href="{{$.Link}}?type={{$.ViewType}}&sort=recentupdate&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}&assignee={{$.AssigneeID}}">{{.i18n.Tr "repo.issues.filter_sort.recentupdate"}}</a>
+					<a class="{{if eq .SortType "recentupdate"}}active{{end}} item" href="{{$.Link}}?q={{$.Keyword}}&type={{$.ViewType}}&sort=recentupdate&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}&assignee={{$.AssigneeID}}">{{.i18n.Tr "repo.issues.filter_sort.recentupdate"}}</a>
-					<a class="{{if eq .SortType "leastupdate"}}active{{end}} item" href="{{$.Link}}?type={{$.ViewType}}&sort=leastupdate&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}&assignee={{$.AssigneeID}}">{{.i18n.Tr "repo.issues.filter_sort.leastupdate"}}</a>
+					<a class="{{if eq .SortType "leastupdate"}}active{{end}} item" href="{{$.Link}}?q={{$.Keyword}}&type={{$.ViewType}}&sort=leastupdate&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}&assignee={{$.AssigneeID}}">{{.i18n.Tr "repo.issues.filter_sort.leastupdate"}}</a>
-					<a class="{{if eq .SortType "mostcomment"}}active{{end}} item" href="{{$.Link}}?type={{$.ViewType}}&sort=mostcomment&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}&assignee={{$.AssigneeID}}">{{.i18n.Tr "repo.issues.filter_sort.mostcomment"}}</a>
+					<a class="{{if eq .SortType "mostcomment"}}active{{end}} item" href="{{$.Link}}?q={{$.Keyword}}&type={{$.ViewType}}&sort=mostcomment&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}&assignee={{$.AssigneeID}}">{{.i18n.Tr "repo.issues.filter_sort.mostcomment"}}</a>
-					<a class="{{if eq .SortType "leastcomment"}}active{{end}} item" href="{{$.Link}}?type={{$.ViewType}}&sort=leastcomment&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}&assignee={{$.AssigneeID}}">{{.i18n.Tr "repo.issues.filter_sort.leastcomment"}}</a>
+					<a class="{{if eq .SortType "leastcomment"}}active{{end}} item" href="{{$.Link}}?q={{$.Keyword}}&type={{$.ViewType}}&sort=leastcomment&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}&assignee={{$.AssigneeID}}">{{.i18n.Tr "repo.issues.filter_sort.leastcomment"}}</a>
 				</div>
 			</div>
 		</div>
@@ -105,7 +106,7 @@
 					<a class="title has-emoji" href="{{$.Link}}/{{.Index}}">{{.Title}}</a>
 
 					{{range .Labels}}
-						<a class="ui label" href="{{$.Link}}?type={{$.ViewType}}&state={{$.State}}&labels={{.ID}}&milestone={{$.MilestoneID}}&assignee={{$.AssigneeID}}" style="color: {{.ForegroundColor}}; background-color: {{.Color}}">{{.Name}}</a>
+						<a class="ui label" href="{{$.Link}}?q={{$.Keyword}}&type={{$.ViewType}}&state={{$.State}}&labels={{.ID}}&milestone={{$.MilestoneID}}&assignee={{$.AssigneeID}}" style="color: {{.ForegroundColor}}; background-color: {{.Color}}">{{.Name}}</a>
 					{{end}}
 
 					{{if .NumComments}}
@@ -115,7 +116,7 @@
 					<p class="desc">
 						{{$.i18n.Tr "repo.issues.opened_by" $timeStr .Poster.HomeLink .Poster.Name | Safe}}
 						{{if .Milestone}}
-							<a class="milestone" href="{{$.Link}}?type={{$.ViewType}}&state={{$.State}}&labels={{$.SelectLabels}}&milestone={{.Milestone.ID}}&assignee={{$.AssigneeID}}">
+							<a class="milestone" href="{{$.Link}}?q={{$.Keyword}}&type={{$.ViewType}}&state={{$.State}}&labels={{$.SelectLabels}}&milestone={{.Milestone.ID}}&assignee={{$.AssigneeID}}">
 								<span class="octicon octicon-milestone"></span> {{.Milestone.Name}}
 							</a>
 						{{end}}
@@ -132,17 +133,17 @@
 				{{if gt .TotalPages 1}}
 					<div class="center page buttons">
 						<div class="ui borderless pagination menu">
-							<a class="{{if not .HasPrevious}}disabled{{end}} item" {{if .HasPrevious}}href="{{$.Link}}?type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels={{$.SelectLabels}}&milestone={{$.MilestoneID}}&assignee={{$.AssigneeID}}&page={{.Previous}}"{{end}}>
+							<a class="{{if not .HasPrevious}}disabled{{end}} item" {{if .HasPrevious}}href="{{$.Link}}?q={{$.Keyword}}&type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels={{$.SelectLabels}}&milestone={{$.MilestoneID}}&assignee={{$.AssigneeID}}&page={{.Previous}}"{{end}}>
 								<i class="left arrow icon"></i> {{$.i18n.Tr "repo.issues.previous"}}
 							</a>
 							{{range .Pages}}
 								{{if eq .Num -1}}
 									<a class="disabled item">...</a>
 								{{else}}
-									<a class="{{if .IsCurrent}}active{{end}} item" {{if not .IsCurrent}}href="{{$.Link}}?type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels={{$.SelectLabels}}&milestone={{$.MilestoneID}}&assignee={{$.AssigneeID}}&page={{.Num}}"{{end}}>{{.Num}}</a>
+									<a class="{{if .IsCurrent}}active{{end}} item" {{if not .IsCurrent}}href="{{$.Link}}?q={{$.Keyword}}&type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels={{$.SelectLabels}}&milestone={{$.MilestoneID}}&assignee={{$.AssigneeID}}&page={{.Num}}"{{end}}>{{.Num}}</a>
 								{{end}}
 							{{end}}
-							<a class="{{if not .HasNext}}disabled{{end}} item" {{if .HasNext}}href="{{$.Link}}?type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels={{$.SelectLabels}}&milestone={{$.MilestoneID}}&assignee={{$.AssigneeID}}&page={{.Next}}"{{end}}>
+							<a class="{{if not .HasNext}}disabled{{end}} item" {{if .HasNext}}href="{{$.Link}}?q={{$.Keyword}}&type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels={{$.SelectLabels}}&milestone={{$.MilestoneID}}&assignee={{$.AssigneeID}}&page={{.Next}}"{{end}}>
 								{{$.i18n.Tr "repo.issues.next"}}&nbsp;<i class="icon right arrow"></i>
 							</a>
 						</div>

templates/repo/issue/navbar.tmpl

@@ -1,4 +1,4 @@
-<div class="ui compact small menu">
+<div class="ui compact left small menu">
 	<a class="{{if .PageIsLabels}}active{{end}} item" href="{{.RepoLink}}/labels">{{.i18n.Tr "repo.labels"}}</a>
 	<a class="{{if .PageIsMilestones}}active{{end}} item" href="{{.RepoLink}}/milestones">{{.i18n.Tr "repo.milestones"}}</a>
 </div>

templates/repo/issue/search.tmpl

@@ -0,0 +1,13 @@
+<form class="ui form">
+	<div class="ui fluid action input">
+		<input type="hidden" name="type" value="{{$.ViewType}}"/>
+		<input type="hidden" name="state" value="{{$.State}}"/>
+		<input type="hidden" name="labels" value="{{.SelectLabels}}"/>
+		<input type="hidden" name="milestone" value="{{$.MilestoneID}}"/>
+		<input type="hidden" name="assignee" value="{{$.AssigneeID}}"/>
+		<div class="ui search action input">
+			<input name="q" value="{{.Keyword}}" placeholder="{{.i18n.Tr "explore.search"}}..." autofocus>
+		</div>
+		<button class="ui blue button" type="submit">{{.i18n.Tr "explore.search"}}</button>
+	</div>
+</form>

vendor/github.com/blevesearch/bleve/CONTRIBUTING.md

@@ -0,0 +1,16 @@
+# Contributing to Bleve
+
+We look forward to your contributions, but ask that you first review these guidelines.
+
+### Sign the CLA
+
+As Bleve is a Couchbase project we require contributors accept the [Couchbase Contributor License Agreement](http://review.couchbase.org/static/individual_agreement.html). To sign this agreement log into the Couchbase [code review tool](http://review.couchbase.org/). The Bleve project does not use this code review tool but it is still used to track acceptance of the contributor license agreements.
+
+### Submitting a Pull Request
+
+All types of contributions are welcome, but please keep the following in mind:
+
+- If you're planning a large change, you should really discuss it in a github issue or on the google group first. This helps avoid duplicate effort and spending time on something that may not be merged.
+- Existing tests should continue to pass, new tests for the contribution are nice to have.
+- All code should have gone through `go fmt`
+- All code should pass `go vet`

vendor/github.com/blevesearch/bleve/LICENSE

@@ -0,0 +1,202 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

vendor/github.com/blevesearch/bleve/README.md

@@ -0,0 +1,62 @@
+# ![bleve](docs/bleve.png) bleve
+
+[![Build Status](https://travis-ci.org/blevesearch/bleve.svg?branch=master)](https://travis-ci.org/blevesearch/bleve) [![Coverage Status](https://coveralls.io/repos/blevesearch/bleve/badge.png?branch=master)](https://coveralls.io/r/blevesearch/bleve?branch=master) [![GoDoc](https://godoc.org/github.com/blevesearch/bleve?status.svg)](https://godoc.org/github.com/blevesearch/bleve)
+[![Join the chat at https://gitter.im/blevesearch/bleve](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/blevesearch/bleve?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
+[![codebeat](https://codebeat.co/badges/38a7cbc9-9cf5-41c0-a315-0746178230f4)](https://codebeat.co/projects/github-com-blevesearch-bleve)
+[![Go Report Card](https://goreportcard.com/badge/blevesearch/bleve)](https://goreportcard.com/report/blevesearch/bleve)
+
+modern text indexing in go - [blevesearch.com](http://www.blevesearch.com/)
+
+Try out bleve live by [searching the bleve website](http://www.blevesearch.com/search/?q=bleve).
+
+## Features
+
+* Index any go data structure (including JSON)
+* Intelligent defaults backed up by powerful configuration
+* Supported field types:
+    * Text, Numeric, Date
+* Supported query types:
+    * Term, Phrase, Match, Match Phrase, Prefix
+    * Conjunction, Disjunction, Boolean
+    * Numeric Range, Date Range
+    * Simple query [syntax](http://www.blevesearch.com/docs/Query-String-Query/) for human entry
+* tf-idf Scoring
+* Search result match highlighting
+* Supports Aggregating Facets:
+    * Terms Facet
+    * Numeric Range Facet
+    * Date Range Facet
+
+## Discussion
+
+Discuss usage and development of bleve in the [google group](https://groups.google.com/forum/#!forum/bleve).
+
+## Indexing
+
+		message := struct{
+			Id   string
+			From string
+			Body string
+		}{
+			Id:   "example",
+			From: "marty.schoch@gmail.com",
+			Body: "bleve indexing is easy",
+		}
+
+		mapping := bleve.NewIndexMapping()
+		index, err := bleve.New("example.bleve", mapping)
+		if err != nil {
+			panic(err)
+		}
+		index.Index(message.Id, message)
+
+## Querying
+
+		index, _ := bleve.Open("example.bleve")
+		query := bleve.NewQueryStringQuery("bleve")
+		searchRequest := bleve.NewSearchRequest(query)
+		searchResult, _ := index.Search(searchRequest)
+
+## License
+
+Apache License Version 2.0

vendor/github.com/blevesearch/bleve/analysis/analyzer/simple/simple.go

@@ -0,0 +1,46 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package simple
+
+import (
+	"github.com/blevesearch/bleve/analysis"
+	"github.com/blevesearch/bleve/analysis/token/lowercase"
+	"github.com/blevesearch/bleve/analysis/tokenizer/letter"
+	"github.com/blevesearch/bleve/registry"
+)
+
+const Name = "simple"
+
+func AnalyzerConstructor(config map[string]interface{}, cache *registry.Cache) (*analysis.Analyzer, error) {
+	tokenizer, err := cache.TokenizerNamed(letter.Name)
+	if err != nil {
+		return nil, err
+	}
+	toLowerFilter, err := cache.TokenFilterNamed(lowercase.Name)
+	if err != nil {
+		return nil, err
+	}
+	rv := analysis.Analyzer{
+		Tokenizer: tokenizer,
+		TokenFilters: []analysis.TokenFilter{
+			toLowerFilter,
+		},
+	}
+	return &rv, nil
+}
+
+func init() {
+	registry.RegisterAnalyzer(Name, AnalyzerConstructor)
+}

vendor/github.com/blevesearch/bleve/analysis/analyzer/standard/standard.go

@@ -0,0 +1,52 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package standard
+
+import (
+	"github.com/blevesearch/bleve/analysis"
+	"github.com/blevesearch/bleve/analysis/lang/en"
+	"github.com/blevesearch/bleve/analysis/token/lowercase"
+	"github.com/blevesearch/bleve/analysis/tokenizer/unicode"
+	"github.com/blevesearch/bleve/registry"
+)
+
+const Name = "standard"
+
+func AnalyzerConstructor(config map[string]interface{}, cache *registry.Cache) (*analysis.Analyzer, error) {
+	tokenizer, err := cache.TokenizerNamed(unicode.Name)
+	if err != nil {
+		return nil, err
+	}
+	toLowerFilter, err := cache.TokenFilterNamed(lowercase.Name)
+	if err != nil {
+		return nil, err
+	}
+	stopEnFilter, err := cache.TokenFilterNamed(en.StopName)
+	if err != nil {
+		return nil, err
+	}
+	rv := analysis.Analyzer{
+		Tokenizer: tokenizer,
+		TokenFilters: []analysis.TokenFilter{
+			toLowerFilter,
+			stopEnFilter,
+		},
+	}
+	return &rv, nil
+}
+
+func init() {
+	registry.RegisterAnalyzer(Name, AnalyzerConstructor)
+}

vendor/github.com/blevesearch/bleve/analysis/datetime/flexible/flexible.go

@@ -0,0 +1,64 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package flexible
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/blevesearch/bleve/analysis"
+	"github.com/blevesearch/bleve/registry"
+)
+
+const Name = "flexiblego"
+
+type DateTimeParser struct {
+	layouts []string
+}
+
+func New(layouts []string) *DateTimeParser {
+	return &DateTimeParser{
+		layouts: layouts,
+	}
+}
+
+func (p *DateTimeParser) ParseDateTime(input string) (time.Time, error) {
+	for _, layout := range p.layouts {
+		rv, err := time.Parse(layout, input)
+		if err == nil {
+			return rv, nil
+		}
+	}
+	return time.Time{}, analysis.ErrInvalidDateTime
+}
+
+func DateTimeParserConstructor(config map[string]interface{}, cache *registry.Cache) (analysis.DateTimeParser, error) {
+	layouts, ok := config["layouts"].([]interface{})
+	if !ok {
+		return nil, fmt.Errorf("must specify layouts")
+	}
+	var layoutStrs []string
+	for _, layout := range layouts {
+		layoutStr, ok := layout.(string)
+		if ok {
+			layoutStrs = append(layoutStrs, layoutStr)
+		}
+	}
+	return New(layoutStrs), nil
+}
+
+func init() {
+	registry.RegisterDateTimeParser(Name, DateTimeParserConstructor)
+}

vendor/github.com/blevesearch/bleve/analysis/datetime/optional/optional.go

@@ -0,0 +1,45 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package optional
+
+import (
+	"time"
+
+	"github.com/blevesearch/bleve/analysis"
+	"github.com/blevesearch/bleve/analysis/datetime/flexible"
+	"github.com/blevesearch/bleve/registry"
+)
+
+const Name = "dateTimeOptional"
+
+const rfc3339NoTimezone = "2006-01-02T15:04:05"
+const rfc3339NoTimezoneNoT = "2006-01-02 15:04:05"
+const rfc3339NoTime = "2006-01-02"
+
+var layouts = []string{
+	time.RFC3339Nano,
+	time.RFC3339,
+	rfc3339NoTimezone,
+	rfc3339NoTimezoneNoT,
+	rfc3339NoTime,
+}
+
+func DateTimeParserConstructor(config map[string]interface{}, cache *registry.Cache) (analysis.DateTimeParser, error) {
+	return flexible.New(layouts), nil
+}
+
+func init() {
+	registry.RegisterDateTimeParser(Name, DateTimeParserConstructor)
+}

vendor/github.com/blevesearch/bleve/analysis/freq.go

@@ -0,0 +1,111 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package analysis
+
+// TokenLocation represents one occurrence of a term at a particular location in
+// a field. Start, End and Position have the same meaning as in analysis.Token.
+// Field and ArrayPositions identify the field value in the source document.
+// See document.Field for details.
+type TokenLocation struct {
+	Field          string
+	ArrayPositions []uint64
+	Start          int
+	End            int
+	Position       int
+}
+
+// TokenFreq represents all the occurrences of a term in all fields of a
+// document.
+type TokenFreq struct {
+	Term      []byte
+	Locations []*TokenLocation
+	frequency int
+}
+
+func (tf *TokenFreq) Frequency() int {
+	return tf.frequency
+}
+
+// TokenFrequencies maps document terms to their combined frequencies from all
+// fields.
+type TokenFrequencies map[string]*TokenFreq
+
+func (tfs TokenFrequencies) MergeAll(remoteField string, other TokenFrequencies) {
+	// walk the new token frequencies
+	for tfk, tf := range other {
+		// set the remoteField value in incoming token freqs
+		for _, l := range tf.Locations {
+			l.Field = remoteField
+		}
+		existingTf, exists := tfs[tfk]
+		if exists {
+			existingTf.Locations = append(existingTf.Locations, tf.Locations...)
+			existingTf.frequency = existingTf.frequency + tf.frequency
+		} else {
+			tfs[tfk] = &TokenFreq{
+				Term:      tf.Term,
+				frequency: tf.frequency,
+				Locations: make([]*TokenLocation, len(tf.Locations)),
+			}
+			copy(tfs[tfk].Locations, tf.Locations)
+		}
+	}
+}
+
+func TokenFrequency(tokens TokenStream, arrayPositions []uint64, includeTermVectors bool) TokenFrequencies {
+	rv := make(map[string]*TokenFreq, len(tokens))
+
+	if includeTermVectors {
+		tls := make([]TokenLocation, len(tokens))
+		tlNext := 0
+
+		for _, token := range tokens {
+			tls[tlNext] = TokenLocation{
+				ArrayPositions: arrayPositions,
+				Start:          token.Start,
+				End:            token.End,
+				Position:       token.Position,
+			}
+
+			curr, ok := rv[string(token.Term)]
+			if ok {
+				curr.Locations = append(curr.Locations, &tls[tlNext])
+				curr.frequency++
+			} else {
+				rv[string(token.Term)] = &TokenFreq{
+					Term:      token.Term,
+					Locations: []*TokenLocation{&tls[tlNext]},
+					frequency: 1,
+				}
+			}
+
+			tlNext++
+		}
+	} else {
+		for _, token := range tokens {
+			curr, exists := rv[string(token.Term)]
+			if exists {
+				curr.frequency++
+			} else {
+				rv[string(token.Term)] = &TokenFreq{
+					Term:      token.Term,
+					frequency: 1,
+				}
+			}
+		}
+	}
+
+	return rv
+}

vendor/github.com/blevesearch/bleve/analysis/lang/en/analyzer_en.go

@@ -0,0 +1,70 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package en implements an analyzer with reasonable defaults for processing
+// English text.
+//
+// It strips possessive suffixes ('s), transforms tokens to lower case,
+// removes stopwords from a built-in list, and applies porter stemming.
+//
+// The built-in stopwords list is defined in EnglishStopWords.
+package en
+
+import (
+	"github.com/blevesearch/bleve/analysis"
+	"github.com/blevesearch/bleve/registry"
+
+	"github.com/blevesearch/bleve/analysis/token/lowercase"
+	"github.com/blevesearch/bleve/analysis/token/porter"
+	"github.com/blevesearch/bleve/analysis/tokenizer/unicode"
+)
+
+const AnalyzerName = "en"
+
+func AnalyzerConstructor(config map[string]interface{}, cache *registry.Cache) (*analysis.Analyzer, error) {
+	tokenizer, err := cache.TokenizerNamed(unicode.Name)
+	if err != nil {
+		return nil, err
+	}
+	possEnFilter, err := cache.TokenFilterNamed(PossessiveName)
+	if err != nil {
+		return nil, err
+	}
+	toLowerFilter, err := cache.TokenFilterNamed(lowercase.Name)
+	if err != nil {
+		return nil, err
+	}
+	stopEnFilter, err := cache.TokenFilterNamed(StopName)
+	if err != nil {
+		return nil, err
+	}
+	stemmerEnFilter, err := cache.TokenFilterNamed(porter.Name)
+	if err != nil {
+		return nil, err
+	}
+	rv := analysis.Analyzer{
+		Tokenizer: tokenizer,
+		TokenFilters: []analysis.TokenFilter{
+			possEnFilter,
+			toLowerFilter,
+			stopEnFilter,
+			stemmerEnFilter,
+		},
+	}
+	return &rv, nil
+}
+
+func init() {
+	registry.RegisterAnalyzer(AnalyzerName, AnalyzerConstructor)
+}

vendor/github.com/blevesearch/bleve/analysis/lang/en/possessive_filter_en.go

@@ -0,0 +1,67 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package en
+
+import (
+	"unicode/utf8"
+
+	"github.com/blevesearch/bleve/analysis"
+	"github.com/blevesearch/bleve/registry"
+)
+
+// PossessiveName is the name PossessiveFilter is registered as
+// in the bleve registry.
+const PossessiveName = "possessive_en"
+
+const rightSingleQuotationMark = '’'
+const apostrophe = '\''
+const fullWidthApostrophe = '＇'
+
+const apostropheChars = rightSingleQuotationMark + apostrophe + fullWidthApostrophe
+
+// PossessiveFilter implements a TokenFilter which
+// strips the English possessive suffix ('s) from tokens.
+// It handle a variety of apostrophe types, is case-insensitive
+// and doesn't distinguish between possessive and contraction.
+// (ie "She's So Rad" becomes "She So Rad")
+type PossessiveFilter struct {
+}
+
+func NewPossessiveFilter() *PossessiveFilter {
+	return &PossessiveFilter{}
+}
+
+func (s *PossessiveFilter) Filter(input analysis.TokenStream) analysis.TokenStream {
+	for _, token := range input {
+		lastRune, lastRuneSize := utf8.DecodeLastRune(token.Term)
+		if lastRune == 's' || lastRune == 'S' {
+			nextLastRune, nextLastRuneSize := utf8.DecodeLastRune(token.Term[:len(token.Term)-lastRuneSize])
+			if nextLastRune == rightSingleQuotationMark ||
+				nextLastRune == apostrophe ||
+				nextLastRune == fullWidthApostrophe {
+				token.Term = token.Term[:len(token.Term)-lastRuneSize-nextLastRuneSize]
+			}
+		}
+	}
+	return input
+}
+
+func PossessiveFilterConstructor(config map[string]interface{}, cache *registry.Cache) (analysis.TokenFilter, error) {
+	return NewPossessiveFilter(), nil
+}
+
+func init() {
+	registry.RegisterTokenFilter(PossessiveName, PossessiveFilterConstructor)
+}

vendor/github.com/blevesearch/bleve/analysis/lang/en/stop_filter_en.go

@@ -0,0 +1,33 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package en
+
+import (
+	"github.com/blevesearch/bleve/analysis"
+	"github.com/blevesearch/bleve/analysis/token/stop"
+	"github.com/blevesearch/bleve/registry"
+)
+
+func StopTokenFilterConstructor(config map[string]interface{}, cache *registry.Cache) (analysis.TokenFilter, error) {
+	tokenMap, err := cache.TokenMapNamed(StopName)
+	if err != nil {
+		return nil, err
+	}
+	return stop.NewStopTokensFilter(tokenMap), nil
+}
+
+func init() {
+	registry.RegisterTokenFilter(StopName, StopTokenFilterConstructor)
+}

vendor/github.com/blevesearch/bleve/analysis/lang/en/stop_words_en.go

@@ -0,0 +1,344 @@
+package en
+
+import (
+	"github.com/blevesearch/bleve/analysis"
+	"github.com/blevesearch/bleve/registry"
+)
+
+const StopName = "stop_en"
+
+// EnglishStopWords is the built-in list of stopwords used by the "stop_en" TokenFilter.
+//
+// this content was obtained from:
+// lucene-4.7.2/analysis/common/src/resources/org/apache/lucene/analysis/snowball/
+// ` was changed to ' to allow for literal string
+var EnglishStopWords = []byte(` | From svn.tartarus.org/snowball/trunk/website/algorithms/english/stop.txt
+ | This file is distributed under the BSD License.
+ | See http://snowball.tartarus.org/license.php
+ | Also see http://www.opensource.org/licenses/bsd-license.html
+ |  - Encoding was converted to UTF-8.
+ |  - This notice was added.
+ |
+ | NOTE: To use this file with StopFilterFactory, you must specify format="snowball"
+ 
+ | An English stop word list. Comments begin with vertical bar. Each stop
+ | word is at the start of a line.
+
+ | Many of the forms below are quite rare (e.g. "yourselves") but included for
+ |  completeness.
+
+           | PRONOUNS FORMS
+             | 1st person sing
+
+i              | subject, always in upper case of course
+
+me             | object
+my             | possessive adjective
+               | the possessive pronoun 'mine' is best suppressed, because of the
+               | sense of coal-mine etc.
+myself         | reflexive
+             | 1st person plural
+we             | subject
+
+| us           | object
+               | care is required here because US = United States. It is usually
+               | safe to remove it if it is in lower case.
+our            | possessive adjective
+ours           | possessive pronoun
+ourselves      | reflexive
+             | second person (archaic 'thou' forms not included)
+you            | subject and object
+your           | possessive adjective
+yours          | possessive pronoun
+yourself       | reflexive (singular)
+yourselves     | reflexive (plural)
+             | third person singular
+he             | subject
+him            | object
+his            | possessive adjective and pronoun
+himself        | reflexive
+
+she            | subject
+her            | object and possessive adjective
+hers           | possessive pronoun
+herself        | reflexive
+
+it             | subject and object
+its            | possessive adjective
+itself         | reflexive
+             | third person plural
+they           | subject
+them           | object
+their          | possessive adjective
+theirs         | possessive pronoun
+themselves     | reflexive
+             | other forms (demonstratives, interrogatives)
+what
+which
+who
+whom
+this
+that
+these
+those
+
+           | VERB FORMS (using F.R. Palmer's nomenclature)
+             | BE
+am             | 1st person, present
+is             | -s form (3rd person, present)
+are            | present
+was            | 1st person, past
+were           | past
+be             | infinitive
+been           | past participle
+being          | -ing form
+             | HAVE
+have           | simple
+has            | -s form
+had            | past
+having         | -ing form
+             | DO
+do             | simple
+does           | -s form
+did            | past
+doing          | -ing form
+
+ | The forms below are, I believe, best omitted, because of the significant
+ | homonym forms:
+
+ |  He made a WILL
+ |  old tin CAN
+ |  merry month of MAY
+ |  a smell of MUST
+ |  fight the good fight with all thy MIGHT
+
+ | would, could, should, ought might however be included
+
+ |          | AUXILIARIES
+ |            | WILL
+ |will
+
+would
+
+ |            | SHALL
+ |shall
+
+should
+
+ |            | CAN
+ |can
+
+could
+
+ |            | MAY
+ |may
+ |might
+ |            | MUST
+ |must
+ |            | OUGHT
+
+ought
+
+           | COMPOUND FORMS, increasingly encountered nowadays in 'formal' writing
+              | pronoun + verb
+
+i'm
+you're
+he's
+she's
+it's
+we're
+they're
+i've
+you've
+we've
+they've
+i'd
+you'd
+he'd
+she'd
+we'd
+they'd
+i'll
+you'll
+he'll
+she'll
+we'll
+they'll
+
+              | verb + negation
+
+isn't
+aren't
+wasn't
+weren't
+hasn't
+haven't
+hadn't
+doesn't
+don't
+didn't
+
+              | auxiliary + negation
+
+won't
+wouldn't
+shan't
+shouldn't
+can't
+cannot
+couldn't
+mustn't
+
+             | miscellaneous forms
+
+let's
+that's
+who's
+what's
+here's
+there's
+when's
+where's
+why's
+how's
+
+              | rarer forms
+
+ | daren't needn't
+
+              | doubtful forms
+
+ | oughtn't mightn't
+
+           | ARTICLES
+a
+an
+the
+
+           | THE REST (Overlap among prepositions, conjunctions, adverbs etc is so
+           | high, that classification is pointless.)
+and
+but
+if
+or
+because
+as
+until
+while
+
+of
+at
+by
+for
+with
+about
+against
+between
+into
+through
+during
+before
+after
+above
+below
+to
+from
+up
+down
+in
+out
+on
+off
+over
+under
+
+again
+further
+then
+once
+
+here
+there
+when
+where
+why
+how
+
+all
+any
+both
+each
+few
+more
+most
+other
+some
+such
+
+no
+nor
+not
+only
+own
+same
+so
+than
+too
+very
+
+ | Just for the record, the following words are among the commonest in English
+
+    | one
+    | every
+    | least
+    | less
+    | many
+    | now
+    | ever
+    | never
+    | say
+    | says
+    | said
+    | also
+    | get
+    | go
+    | goes
+    | just
+    | made
+    | make
+    | put
+    | see
+    | seen
+    | whether
+    | like
+    | well
+    | back
+    | even
+    | still
+    | way
+    | take
+    | since
+    | another
+    | however
+    | two
+    | three
+    | four
+    | five
+    | first
+    | second
+    | new
+    | old
+    | high
+    | long
+`)
+
+func TokenMapConstructor(config map[string]interface{}, cache *registry.Cache) (analysis.TokenMap, error) {
+	rv := analysis.NewTokenMap()
+	err := rv.LoadBytes(EnglishStopWords)
+	return rv, err
+}
+
+func init() {
+	registry.RegisterTokenMap(StopName, TokenMapConstructor)
+}

vendor/github.com/blevesearch/bleve/analysis/test_words.txt

@@ -0,0 +1,7 @@
+# full line comment
+marty
+steve # trailing comment
+| different format of comment
+dustin
+siri | different style trailing comment
+multiple words	with different	whitespace

vendor/github.com/blevesearch/bleve/analysis/token/lowercase/lowercase.go

@@ -0,0 +1,105 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package lowercase implements a TokenFilter which converts
+// tokens to lower case according to unicode rules.
+package lowercase
+
+import (
+	"bytes"
+	"unicode"
+	"unicode/utf8"
+
+	"github.com/blevesearch/bleve/analysis"
+	"github.com/blevesearch/bleve/registry"
+)
+
+// Name is the name used to register LowerCaseFilter in the bleve registry
+const Name = "to_lower"
+
+type LowerCaseFilter struct {
+}
+
+func NewLowerCaseFilter() *LowerCaseFilter {
+	return &LowerCaseFilter{}
+}
+
+func (f *LowerCaseFilter) Filter(input analysis.TokenStream) analysis.TokenStream {
+	for _, token := range input {
+		token.Term = toLowerDeferredCopy(token.Term)
+	}
+	return input
+}
+
+func LowerCaseFilterConstructor(config map[string]interface{}, cache *registry.Cache) (analysis.TokenFilter, error) {
+	return NewLowerCaseFilter(), nil
+}
+
+func init() {
+	registry.RegisterTokenFilter(Name, LowerCaseFilterConstructor)
+}
+
+// toLowerDeferredCopy will function exactly like
+// bytes.ToLower() only it will reuse (overwrite)
+// the original byte array when possible
+// NOTE: because its possible that the lower-case
+// form of a rune has a different utf-8 encoded
+// length, in these cases a new byte array is allocated
+func toLowerDeferredCopy(s []byte) []byte {
+	j := 0
+	for i := 0; i < len(s); {
+		wid := 1
+		r := rune(s[i])
+		if r >= utf8.RuneSelf {
+			r, wid = utf8.DecodeRune(s[i:])
+		}
+
+		l := unicode.ToLower(r)
+
+		// If the rune is already lowercased, just move to the
+		// next rune.
+		if l == r {
+			i += wid
+			j += wid
+			continue
+		}
+
+		// Handles the Unicode edge-case where the last
+		// rune in a word on the greek Σ needs to be converted
+		// differently.
+		if l == 'σ' && i+2 == len(s) {
+			l = 'ς'
+		}
+
+		lwid := utf8.RuneLen(l)
+		if lwid > wid {
+			// utf-8 encoded replacement is wider
+			// for now, punt and defer
+			// to bytes.ToLower() for the remainder
+			// only known to happen with chars
+			//   Rune Ⱥ(570) width 2 - Lower ⱥ(11365) width 3
+			//   Rune Ⱦ(574) width 2 - Lower ⱦ(11366) width 3
+			rest := bytes.ToLower(s[i:])
+			rv := make([]byte, j+len(rest))
+			copy(rv[:j], s[:j])
+			copy(rv[j:], rest)
+			return rv
+		} else {
+			utf8.EncodeRune(s[j:], l)
+		}
+		i += wid
+		j += lwid
+	}
+	return s[:j]
+}

vendor/github.com/blevesearch/bleve/analysis/token/porter/porter.go

@@ -0,0 +1,53 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package porter
+
+import (
+	"bytes"
+
+	"github.com/blevesearch/bleve/analysis"
+	"github.com/blevesearch/bleve/registry"
+
+	"github.com/blevesearch/go-porterstemmer"
+)
+
+const Name = "stemmer_porter"
+
+type PorterStemmer struct {
+}
+
+func NewPorterStemmer() *PorterStemmer {
+	return &PorterStemmer{}
+}
+
+func (s *PorterStemmer) Filter(input analysis.TokenStream) analysis.TokenStream {
+	for _, token := range input {
+		// if it is not a protected keyword, stem it
+		if !token.KeyWord {
+			termRunes := bytes.Runes(token.Term)
+			stemmedRunes := porterstemmer.StemWithoutLowerCasing(termRunes)
+			token.Term = analysis.BuildTermFromRunes(stemmedRunes)
+		}
+	}
+	return input
+}
+
+func PorterStemmerConstructor(config map[string]interface{}, cache *registry.Cache) (analysis.TokenFilter, error) {
+	return NewPorterStemmer(), nil
+}
+
+func init() {
+	registry.RegisterTokenFilter(Name, PorterStemmerConstructor)
+}

vendor/github.com/blevesearch/bleve/analysis/token/stop/stop.go

@@ -0,0 +1,70 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package stop implements a TokenFilter removing tokens found in
+// a TokenMap.
+//
+// It constructor takes the following arguments:
+//
+// "stop_token_map" (string): the name of the token map identifying tokens to
+// remove.
+package stop
+
+import (
+	"fmt"
+
+	"github.com/blevesearch/bleve/analysis"
+	"github.com/blevesearch/bleve/registry"
+)
+
+const Name = "stop_tokens"
+
+type StopTokensFilter struct {
+	stopTokens analysis.TokenMap
+}
+
+func NewStopTokensFilter(stopTokens analysis.TokenMap) *StopTokensFilter {
+	return &StopTokensFilter{
+		stopTokens: stopTokens,
+	}
+}
+
+func (f *StopTokensFilter) Filter(input analysis.TokenStream) analysis.TokenStream {
+	j := 0
+	for _, token := range input {
+		_, isStopToken := f.stopTokens[string(token.Term)]
+		if !isStopToken {
+			input[j] = token
+			j++
+		}
+	}
+
+	return input[:j]
+}
+
+func StopTokensFilterConstructor(config map[string]interface{}, cache *registry.Cache) (analysis.TokenFilter, error) {
+	stopTokenMapName, ok := config["stop_token_map"].(string)
+	if !ok {
+		return nil, fmt.Errorf("must specify stop_token_map")
+	}
+	stopTokenMap, err := cache.TokenMapNamed(stopTokenMapName)
+	if err != nil {
+		return nil, fmt.Errorf("error building stop words filter: %v", err)
+	}
+	return NewStopTokensFilter(stopTokenMap), nil
+}
+
+func init() {
+	registry.RegisterTokenFilter(Name, StopTokensFilterConstructor)
+}

vendor/github.com/blevesearch/bleve/analysis/tokenizer/character/character.go

@@ -0,0 +1,76 @@
+//  Copyright (c) 2016 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package character
+
+import (
+	"unicode/utf8"
+
+	"github.com/blevesearch/bleve/analysis"
+)
+
+type IsTokenRune func(r rune) bool
+
+type CharacterTokenizer struct {
+	isTokenRun IsTokenRune
+}
+
+func NewCharacterTokenizer(f IsTokenRune) *CharacterTokenizer {
+	return &CharacterTokenizer{
+		isTokenRun: f,
+	}
+}
+
+func (c *CharacterTokenizer) Tokenize(input []byte) analysis.TokenStream {
+
+	rv := make(analysis.TokenStream, 0, 1024)
+
+	offset := 0
+	start := 0
+	end := 0
+	count := 0
+	for currRune, size := utf8.DecodeRune(input[offset:]); currRune != utf8.RuneError; currRune, size = utf8.DecodeRune(input[offset:]) {
+		isToken := c.isTokenRun(currRune)
+		if isToken {
+			end = offset + size
+		} else {
+			if end-start > 0 {
+				// build token
+				rv = append(rv, &analysis.Token{
+					Term:     input[start:end],
+					Start:    start,
+					End:      end,
+					Position: count + 1,
+					Type:     analysis.AlphaNumeric,
+				})
+				count++
+			}
+			start = offset + size
+			end = start
+		}
+		offset += size
+	}
+	// if we ended in the middle of a token, finish it
+	if end-start > 0 {
+		// build token
+		rv = append(rv, &analysis.Token{
+			Term:     input[start:end],
+			Start:    start,
+			End:      end,
+			Position: count + 1,
+			Type:     analysis.AlphaNumeric,
+		})
+	}
+	return rv
+}

vendor/github.com/blevesearch/bleve/analysis/tokenizer/letter/letter.go

@@ -0,0 +1,33 @@
+//  Copyright (c) 2016 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package letter
+
+import (
+	"unicode"
+
+	"github.com/blevesearch/bleve/analysis"
+	"github.com/blevesearch/bleve/analysis/tokenizer/character"
+	"github.com/blevesearch/bleve/registry"
+)
+
+const Name = "letter"
+
+func TokenizerConstructor(config map[string]interface{}, cache *registry.Cache) (analysis.Tokenizer, error) {
+	return character.NewCharacterTokenizer(unicode.IsLetter), nil
+}
+
+func init() {
+	registry.RegisterTokenizer(Name, TokenizerConstructor)
+}

vendor/github.com/blevesearch/bleve/analysis/tokenizer/unicode/unicode.go

@@ -0,0 +1,131 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package unicode
+
+import (
+	"github.com/blevesearch/segment"
+
+	"github.com/blevesearch/bleve/analysis"
+	"github.com/blevesearch/bleve/registry"
+)
+
+const Name = "unicode"
+
+type UnicodeTokenizer struct {
+}
+
+func NewUnicodeTokenizer() *UnicodeTokenizer {
+	return &UnicodeTokenizer{}
+}
+
+func (rt *UnicodeTokenizer) Tokenize(input []byte) analysis.TokenStream {
+	rvx := make([]analysis.TokenStream, 0, 10) // When rv gets full, append to rvx.
+	rv := make(analysis.TokenStream, 0, 1)
+
+	ta := []analysis.Token(nil)
+	taNext := 0
+
+	segmenter := segment.NewWordSegmenterDirect(input)
+	start := 0
+	pos := 1
+
+	guessRemaining := func(end int) int {
+		avgSegmentLen := end / (len(rv) + 1)
+		if avgSegmentLen < 1 {
+			avgSegmentLen = 1
+		}
+
+		remainingLen := len(input) - end
+
+		return remainingLen / avgSegmentLen
+	}
+
+	for segmenter.Segment() {
+		segmentBytes := segmenter.Bytes()
+		end := start + len(segmentBytes)
+		if segmenter.Type() != segment.None {
+			if taNext >= len(ta) {
+				remainingSegments := guessRemaining(end)
+				if remainingSegments > 1000 {
+					remainingSegments = 1000
+				}
+				if remainingSegments < 1 {
+					remainingSegments = 1
+				}
+
+				ta = make([]analysis.Token, remainingSegments)
+				taNext = 0
+			}
+
+			token := &ta[taNext]
+			taNext++
+
+			token.Term = segmentBytes
+			token.Start = start
+			token.End = end
+			token.Position = pos
+			token.Type = convertType(segmenter.Type())
+
+			if len(rv) >= cap(rv) { // When rv is full, save it into rvx.
+				rvx = append(rvx, rv)
+
+				rvCap := cap(rv) * 2
+				if rvCap > 256 {
+					rvCap = 256
+				}
+
+				rv = make(analysis.TokenStream, 0, rvCap) // Next rv cap is bigger.
+			}
+
+			rv = append(rv, token)
+			pos++
+		}
+		start = end
+	}
+
+	if len(rvx) > 0 {
+		n := len(rv)
+		for _, r := range rvx {
+			n += len(r)
+		}
+		rall := make(analysis.TokenStream, 0, n)
+		for _, r := range rvx {
+			rall = append(rall, r...)
+		}
+		return append(rall, rv...)
+	}
+
+	return rv
+}
+
+func UnicodeTokenizerConstructor(config map[string]interface{}, cache *registry.Cache) (analysis.Tokenizer, error) {
+	return NewUnicodeTokenizer(), nil
+}
+
+func init() {
+	registry.RegisterTokenizer(Name, UnicodeTokenizerConstructor)
+}
+
+func convertType(segmentWordType int) analysis.TokenType {
+	switch segmentWordType {
+	case segment.Ideo:
+		return analysis.Ideographic
+	case segment.Kana:
+		return analysis.Ideographic
+	case segment.Number:
+		return analysis.Numeric
+	}
+	return analysis.AlphaNumeric
+}

vendor/github.com/blevesearch/bleve/analysis/tokenmap.go

@@ -0,0 +1,76 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package analysis
+
+import (
+	"bufio"
+	"bytes"
+	"io"
+	"io/ioutil"
+	"strings"
+)
+
+type TokenMap map[string]bool
+
+func NewTokenMap() TokenMap {
+	return make(TokenMap, 0)
+}
+
+// LoadFile reads in a list of tokens from a text file,
+// one per line.
+// Comments are supported using `#` or `|`
+func (t TokenMap) LoadFile(filename string) error {
+	data, err := ioutil.ReadFile(filename)
+	if err != nil {
+		return err
+	}
+	return t.LoadBytes(data)
+}
+
+// LoadBytes reads in a list of tokens from memory,
+// one per line.
+// Comments are supported using `#` or `|`
+func (t TokenMap) LoadBytes(data []byte) error {
+	bytesReader := bytes.NewReader(data)
+	bufioReader := bufio.NewReader(bytesReader)
+	line, err := bufioReader.ReadString('\n')
+	for err == nil {
+		t.LoadLine(line)
+		line, err = bufioReader.ReadString('\n')
+	}
+	// if the err was EOF we still need to process the last value
+	if err == io.EOF {
+		t.LoadLine(line)
+		return nil
+	}
+	return err
+}
+
+func (t TokenMap) LoadLine(line string) {
+	// find the start of a comment, if any
+	startComment := strings.IndexAny(line, "#|")
+	if startComment >= 0 {
+		line = line[:startComment]
+	}
+
+	tokens := strings.Fields(line)
+	for _, token := range tokens {
+		t.AddToken(token)
+	}
+}
+
+func (t TokenMap) AddToken(token string) {
+	t[token] = true
+}

vendor/github.com/blevesearch/bleve/analysis/type.go

@@ -0,0 +1,103 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package analysis
+
+import (
+	"fmt"
+	"time"
+)
+
+type CharFilter interface {
+	Filter([]byte) []byte
+}
+
+type TokenType int
+
+const (
+	AlphaNumeric TokenType = iota
+	Ideographic
+	Numeric
+	DateTime
+	Shingle
+	Single
+	Double
+	Boolean
+)
+
+// Token represents one occurrence of a term at a particular location in a
+// field.
+type Token struct {
+	// Start specifies the byte offset of the beginning of the term in the
+	// field.
+	Start int `json:"start"`
+
+	// End specifies the byte offset of the end of the term in the field.
+	End  int    `json:"end"`
+	Term []byte `json:"term"`
+
+	// Position specifies the 1-based index of the token in the sequence of
+	// occurrences of its term in the field.
+	Position int       `json:"position"`
+	Type     TokenType `json:"type"`
+	KeyWord  bool      `json:"keyword"`
+}
+
+func (t *Token) String() string {
+	return fmt.Sprintf("Start: %d  End: %d  Position: %d  Token: %s  Type: %d", t.Start, t.End, t.Position, string(t.Term), t.Type)
+}
+
+type TokenStream []*Token
+
+// A Tokenizer splits an input string into tokens, the usual behaviour being to
+// map words to tokens.
+type Tokenizer interface {
+	Tokenize([]byte) TokenStream
+}
+
+// A TokenFilter adds, transforms or removes tokens from a token stream.
+type TokenFilter interface {
+	Filter(TokenStream) TokenStream
+}
+
+type Analyzer struct {
+	CharFilters  []CharFilter
+	Tokenizer    Tokenizer
+	TokenFilters []TokenFilter
+}
+
+func (a *Analyzer) Analyze(input []byte) TokenStream {
+	if a.CharFilters != nil {
+		for _, cf := range a.CharFilters {
+			input = cf.Filter(input)
+		}
+	}
+	tokens := a.Tokenizer.Tokenize(input)
+	if a.TokenFilters != nil {
+		for _, tf := range a.TokenFilters {
+			tokens = tf.Filter(tokens)
+		}
+	}
+	return tokens
+}
+
+var ErrInvalidDateTime = fmt.Errorf("unable to parse datetime with any of the layouts")
+
+type DateTimeParser interface {
+	ParseDateTime(string) (time.Time, error)
+}
+
+type ByteArrayConverter interface {
+	Convert([]byte) (interface{}, error)
+}

vendor/github.com/blevesearch/bleve/analysis/util.go

@@ -0,0 +1,92 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package analysis
+
+import (
+	"bytes"
+	"unicode/utf8"
+)
+
+func DeleteRune(in []rune, pos int) []rune {
+	if pos >= len(in) {
+		return in
+	}
+	copy(in[pos:], in[pos+1:])
+	return in[:len(in)-1]
+}
+
+func InsertRune(in []rune, pos int, r rune) []rune {
+	// create a new slice 1 rune larger
+	rv := make([]rune, len(in)+1)
+	// copy the characters before the insert pos
+	copy(rv[0:pos], in[0:pos])
+	// set the inserted rune
+	rv[pos] = r
+	// copy the characters after the insert pos
+	copy(rv[pos+1:], in[pos:])
+	return rv
+}
+
+// BuildTermFromRunesOptimistic will build a term from the provided runes
+// AND optimistically attempt to encode into the provided buffer
+// if at any point it appears the buffer is too small, a new buffer is
+// allocated and that is used instead
+// this should be used in cases where frequently the new term is the same
+// length or shorter than the original term (in number of bytes)
+func BuildTermFromRunesOptimistic(buf []byte, runes []rune) []byte {
+	rv := buf
+	used := 0
+	for _, r := range runes {
+		nextLen := utf8.RuneLen(r)
+		if used+nextLen > len(rv) {
+			// alloc new buf
+			buf = make([]byte, len(runes)*utf8.UTFMax)
+			// copy work we've already done
+			copy(buf, rv[:used])
+			rv = buf
+		}
+		written := utf8.EncodeRune(rv[used:], r)
+		used += written
+	}
+	return rv[:used]
+}
+
+func BuildTermFromRunes(runes []rune) []byte {
+	return BuildTermFromRunesOptimistic(make([]byte, len(runes)*utf8.UTFMax), runes)
+}
+
+func TruncateRunes(input []byte, num int) []byte {
+	runes := bytes.Runes(input)
+	runes = runes[:len(runes)-num]
+	out := BuildTermFromRunes(runes)
+	return out
+}
+
+func RunesEndsWith(input []rune, suffix string) bool {
+	inputLen := len(input)
+	suffixRunes := []rune(suffix)
+	suffixLen := len(suffixRunes)
+	if suffixLen > inputLen {
+		return false
+	}
+
+	for i := suffixLen - 1; i >= 0; i-- {
+		if input[inputLen-(suffixLen-i)] != suffixRunes[i] {
+			return false
+		}
+	}
+
+	return true
+}

vendor/github.com/blevesearch/bleve/config.go

@@ -0,0 +1,88 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package bleve
+
+import (
+	"expvar"
+	"io/ioutil"
+	"log"
+	"time"
+
+	"github.com/blevesearch/bleve/index"
+	"github.com/blevesearch/bleve/index/store/gtreap"
+	"github.com/blevesearch/bleve/index/upsidedown"
+	"github.com/blevesearch/bleve/registry"
+	"github.com/blevesearch/bleve/search/highlight/highlighter/html"
+)
+
+var bleveExpVar = expvar.NewMap("bleve")
+
+type configuration struct {
+	Cache                  *registry.Cache
+	DefaultHighlighter     string
+	DefaultKVStore         string
+	DefaultMemKVStore      string
+	DefaultIndexType       string
+	SlowSearchLogThreshold time.Duration
+	analysisQueue          *index.AnalysisQueue
+}
+
+func (c *configuration) SetAnalysisQueueSize(n int) {
+	c.analysisQueue = index.NewAnalysisQueue(n)
+}
+
+func newConfiguration() *configuration {
+	return &configuration{
+		Cache:         registry.NewCache(),
+		analysisQueue: index.NewAnalysisQueue(4),
+	}
+}
+
+// Config contains library level configuration
+var Config *configuration
+
+func init() {
+	bootStart := time.Now()
+
+	// build the default configuration
+	Config = newConfiguration()
+
+	// set the default highlighter
+	Config.DefaultHighlighter = html.Name
+
+	// default kv store
+	Config.DefaultKVStore = ""
+
+	// default mem only kv store
+	Config.DefaultMemKVStore = gtreap.Name
+
+	// default index
+	Config.DefaultIndexType = upsidedown.Name
+
+	bootDuration := time.Since(bootStart)
+	bleveExpVar.Add("bootDuration", int64(bootDuration))
+	indexStats = NewIndexStats()
+	bleveExpVar.Set("indexes", indexStats)
+
+	initDisk()
+}
+
+var logger = log.New(ioutil.Discard, "bleve", log.LstdFlags)
+
+// SetLog sets the logger used for logging
+// by default log messages are sent to ioutil.Discard
+func SetLog(l *log.Logger) {
+	logger = l
+}

vendor/github.com/blevesearch/bleve/config_app.go

@@ -0,0 +1,23 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// +build appengine appenginevm
+
+package bleve
+
+// in the appengine environment we cannot support disk based indexes
+// so we do no extra configuration in this method
+func initDisk() {
+
+}

vendor/github.com/blevesearch/bleve/config_disk.go

@@ -0,0 +1,25 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// +build !appengine,!appenginevm
+
+package bleve
+
+import "github.com/blevesearch/bleve/index/store/boltdb"
+
+// in normal environments we configure boltdb as the default storage
+func initDisk() {
+	// default kv store
+	Config.DefaultKVStore = boltdb.Name
+}

vendor/github.com/blevesearch/bleve/doc.go

@@ -0,0 +1,38 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+/*
+Package bleve is a library for indexing and searching text.
+
+Example Opening New Index, Indexing Data
+
+    message := struct{
+        Id:   "example"
+        From: "marty.schoch@gmail.com",
+        Body: "bleve indexing is easy",
+    }
+
+    mapping := bleve.NewIndexMapping()
+    index, _ := bleve.New("example.bleve", mapping)
+    index.Index(message.Id, message)
+
+Example Opening Existing Index, Searching Data
+
+    index, _ := bleve.Open("example.bleve")
+    query := bleve.NewQueryStringQuery("bleve")
+    searchRequest := bleve.NewSearchRequest(query)
+    searchResult, _ := index.Search(searchRequest)
+
+*/
+package bleve

vendor/github.com/blevesearch/bleve/document/document.go

@@ -0,0 +1,75 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package document
+
+import "fmt"
+
+type Document struct {
+	ID              string  `json:"id"`
+	Fields          []Field `json:"fields"`
+	CompositeFields []*CompositeField
+	Number          uint64 `json:"-"`
+}
+
+func NewDocument(id string) *Document {
+	return &Document{
+		ID:              id,
+		Fields:          make([]Field, 0),
+		CompositeFields: make([]*CompositeField, 0),
+	}
+}
+
+func (d *Document) AddField(f Field) *Document {
+	switch f := f.(type) {
+	case *CompositeField:
+		d.CompositeFields = append(d.CompositeFields, f)
+	default:
+		d.Fields = append(d.Fields, f)
+	}
+	return d
+}
+
+func (d *Document) GoString() string {
+	fields := ""
+	for i, field := range d.Fields {
+		if i != 0 {
+			fields += ", "
+		}
+		fields += fmt.Sprintf("%#v", field)
+	}
+	compositeFields := ""
+	for i, field := range d.CompositeFields {
+		if i != 0 {
+			compositeFields += ", "
+		}
+		compositeFields += fmt.Sprintf("%#v", field)
+	}
+	return fmt.Sprintf("&document.Document{ID:%s, Fields: %s, CompositeFields: %s}", d.ID, fields, compositeFields)
+}
+
+func (d *Document) NumPlainTextBytes() uint64 {
+	rv := uint64(0)
+	for _, field := range d.Fields {
+		rv += field.NumPlainTextBytes()
+	}
+	for _, compositeField := range d.CompositeFields {
+		for _, field := range d.Fields {
+			if compositeField.includesField(field.Name()) {
+				rv += field.NumPlainTextBytes()
+			}
+		}
+	}
+	return rv
+}

vendor/github.com/blevesearch/bleve/document/field.go

@@ -0,0 +1,39 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package document
+
+import (
+	"github.com/blevesearch/bleve/analysis"
+)
+
+type Field interface {
+	// Name returns the path of the field from the root DocumentMapping.
+	// A root field path is "field", a subdocument field is "parent.field".
+	Name() string
+	// ArrayPositions returns the intermediate document and field indices
+	// required to resolve the field value in the document. For example, if the
+	// field path is "doc1.doc2.field" where doc1 and doc2 are slices or
+	// arrays, ArrayPositions returns 2 indices used to resolve "doc2" value in
+	// "doc1", then "field" in "doc2".
+	ArrayPositions() []uint64
+	Options() IndexingOptions
+	Analyze() (int, analysis.TokenFrequencies)
+	Value() []byte
+
+	// NumPlainTextBytes should return the number of plain text bytes
+	// that this field represents - this is a common metric for tracking
+	// the rate of indexing
+	NumPlainTextBytes() uint64
+}

vendor/github.com/blevesearch/bleve/document/field_boolean.go

@@ -0,0 +1,107 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package document
+
+import (
+	"fmt"
+
+	"github.com/blevesearch/bleve/analysis"
+)
+
+const DefaultBooleanIndexingOptions = StoreField | IndexField
+
+type BooleanField struct {
+	name              string
+	arrayPositions    []uint64
+	options           IndexingOptions
+	value             []byte
+	numPlainTextBytes uint64
+}
+
+func (b *BooleanField) Name() string {
+	return b.name
+}
+
+func (b *BooleanField) ArrayPositions() []uint64 {
+	return b.arrayPositions
+}
+
+func (b *BooleanField) Options() IndexingOptions {
+	return b.options
+}
+
+func (b *BooleanField) Analyze() (int, analysis.TokenFrequencies) {
+	tokens := make(analysis.TokenStream, 0)
+	tokens = append(tokens, &analysis.Token{
+		Start:    0,
+		End:      len(b.value),
+		Term:     b.value,
+		Position: 1,
+		Type:     analysis.Boolean,
+	})
+
+	fieldLength := len(tokens)
+	tokenFreqs := analysis.TokenFrequency(tokens, b.arrayPositions, b.options.IncludeTermVectors())
+	return fieldLength, tokenFreqs
+}
+
+func (b *BooleanField) Value() []byte {
+	return b.value
+}
+
+func (b *BooleanField) Boolean() (bool, error) {
+	if len(b.value) == 1 {
+		return b.value[0] == 'T', nil
+	}
+	return false, fmt.Errorf("boolean field has %d bytes", len(b.value))
+}
+
+func (b *BooleanField) GoString() string {
+	return fmt.Sprintf("&document.BooleanField{Name:%s, Options: %s, Value: %s}", b.name, b.options, b.value)
+}
+
+func (b *BooleanField) NumPlainTextBytes() uint64 {
+	return b.numPlainTextBytes
+}
+
+func NewBooleanFieldFromBytes(name string, arrayPositions []uint64, value []byte) *BooleanField {
+	return &BooleanField{
+		name:              name,
+		arrayPositions:    arrayPositions,
+		value:             value,
+		options:           DefaultNumericIndexingOptions,
+		numPlainTextBytes: uint64(len(value)),
+	}
+}
+
+func NewBooleanField(name string, arrayPositions []uint64, b bool) *BooleanField {
+	return NewBooleanFieldWithIndexingOptions(name, arrayPositions, b, DefaultNumericIndexingOptions)
+}
+
+func NewBooleanFieldWithIndexingOptions(name string, arrayPositions []uint64, b bool, options IndexingOptions) *BooleanField {
+	numPlainTextBytes := 5
+	v := []byte("F")
+	if b {
+		numPlainTextBytes = 4
+		v = []byte("T")
+	}
+	return &BooleanField{
+		name:              name,
+		arrayPositions:    arrayPositions,
+		value:             v,
+		options:           options,
+		numPlainTextBytes: uint64(numPlainTextBytes),
+	}
+}

vendor/github.com/blevesearch/bleve/document/field_composite.go

@@ -0,0 +1,99 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package document
+
+import (
+	"github.com/blevesearch/bleve/analysis"
+)
+
+const DefaultCompositeIndexingOptions = IndexField
+
+type CompositeField struct {
+	name                 string
+	includedFields       map[string]bool
+	excludedFields       map[string]bool
+	defaultInclude       bool
+	options              IndexingOptions
+	totalLength          int
+	compositeFrequencies analysis.TokenFrequencies
+}
+
+func NewCompositeField(name string, defaultInclude bool, include []string, exclude []string) *CompositeField {
+	return NewCompositeFieldWithIndexingOptions(name, defaultInclude, include, exclude, DefaultCompositeIndexingOptions)
+}
+
+func NewCompositeFieldWithIndexingOptions(name string, defaultInclude bool, include []string, exclude []string, options IndexingOptions) *CompositeField {
+	rv := &CompositeField{
+		name:                 name,
+		options:              options,
+		defaultInclude:       defaultInclude,
+		includedFields:       make(map[string]bool, len(include)),
+		excludedFields:       make(map[string]bool, len(exclude)),
+		compositeFrequencies: make(analysis.TokenFrequencies),
+	}
+
+	for _, i := range include {
+		rv.includedFields[i] = true
+	}
+	for _, e := range exclude {
+		rv.excludedFields[e] = true
+	}
+
+	return rv
+}
+
+func (c *CompositeField) Name() string {
+	return c.name
+}
+
+func (c *CompositeField) ArrayPositions() []uint64 {
+	return []uint64{}
+}
+
+func (c *CompositeField) Options() IndexingOptions {
+	return c.options
+}
+
+func (c *CompositeField) Analyze() (int, analysis.TokenFrequencies) {
+	return c.totalLength, c.compositeFrequencies
+}
+
+func (c *CompositeField) Value() []byte {
+	return []byte{}
+}
+
+func (c *CompositeField) NumPlainTextBytes() uint64 {
+	return 0
+}
+
+func (c *CompositeField) includesField(field string) bool {
+	shouldInclude := c.defaultInclude
+	_, fieldShouldBeIncluded := c.includedFields[field]
+	if fieldShouldBeIncluded {
+		shouldInclude = true
+	}
+	_, fieldShouldBeExcluded := c.excludedFields[field]
+	if fieldShouldBeExcluded {
+		shouldInclude = false
+	}
+	return shouldInclude
+}
+
+func (c *CompositeField) Compose(field string, length int, freq analysis.TokenFrequencies) {
+	if c.includesField(field) {
+		c.totalLength += length
+		c.compositeFrequencies.MergeAll(field, freq)
+	}
+}

vendor/github.com/blevesearch/bleve/document/field_datetime.go

@@ -0,0 +1,144 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package document
+
+import (
+	"fmt"
+	"math"
+	"time"
+
+	"github.com/blevesearch/bleve/analysis"
+	"github.com/blevesearch/bleve/numeric"
+)
+
+const DefaultDateTimeIndexingOptions = StoreField | IndexField
+const DefaultDateTimePrecisionStep uint = 4
+
+var MinTimeRepresentable = time.Unix(0, math.MinInt64)
+var MaxTimeRepresentable = time.Unix(0, math.MaxInt64)
+
+type DateTimeField struct {
+	name              string
+	arrayPositions    []uint64
+	options           IndexingOptions
+	value             numeric.PrefixCoded
+	numPlainTextBytes uint64
+}
+
+func (n *DateTimeField) Name() string {
+	return n.name
+}
+
+func (n *DateTimeField) ArrayPositions() []uint64 {
+	return n.arrayPositions
+}
+
+func (n *DateTimeField) Options() IndexingOptions {
+	return n.options
+}
+
+func (n *DateTimeField) Analyze() (int, analysis.TokenFrequencies) {
+	tokens := make(analysis.TokenStream, 0)
+	tokens = append(tokens, &analysis.Token{
+		Start:    0,
+		End:      len(n.value),
+		Term:     n.value,
+		Position: 1,
+		Type:     analysis.DateTime,
+	})
+
+	original, err := n.value.Int64()
+	if err == nil {
+
+		shift := DefaultDateTimePrecisionStep
+		for shift < 64 {
+			shiftEncoded, err := numeric.NewPrefixCodedInt64(original, shift)
+			if err != nil {
+				break
+			}
+			token := analysis.Token{
+				Start:    0,
+				End:      len(shiftEncoded),
+				Term:     shiftEncoded,
+				Position: 1,
+				Type:     analysis.DateTime,
+			}
+			tokens = append(tokens, &token)
+			shift += DefaultDateTimePrecisionStep
+		}
+	}
+
+	fieldLength := len(tokens)
+	tokenFreqs := analysis.TokenFrequency(tokens, n.arrayPositions, n.options.IncludeTermVectors())
+	return fieldLength, tokenFreqs
+}
+
+func (n *DateTimeField) Value() []byte {
+	return n.value
+}
+
+func (n *DateTimeField) DateTime() (time.Time, error) {
+	i64, err := n.value.Int64()
+	if err != nil {
+		return time.Time{}, err
+	}
+	return time.Unix(0, i64).UTC(), nil
+}
+
+func (n *DateTimeField) GoString() string {
+	return fmt.Sprintf("&document.DateField{Name:%s, Options: %s, Value: %s}", n.name, n.options, n.value)
+}
+
+func (n *DateTimeField) NumPlainTextBytes() uint64 {
+	return n.numPlainTextBytes
+}
+
+func NewDateTimeFieldFromBytes(name string, arrayPositions []uint64, value []byte) *DateTimeField {
+	return &DateTimeField{
+		name:              name,
+		arrayPositions:    arrayPositions,
+		value:             value,
+		options:           DefaultDateTimeIndexingOptions,
+		numPlainTextBytes: uint64(len(value)),
+	}
+}
+
+func NewDateTimeField(name string, arrayPositions []uint64, dt time.Time) (*DateTimeField, error) {
+	return NewDateTimeFieldWithIndexingOptions(name, arrayPositions, dt, DefaultDateTimeIndexingOptions)
+}
+
+func NewDateTimeFieldWithIndexingOptions(name string, arrayPositions []uint64, dt time.Time, options IndexingOptions) (*DateTimeField, error) {
+	if canRepresent(dt) {
+		dtInt64 := dt.UnixNano()
+		prefixCoded := numeric.MustNewPrefixCodedInt64(dtInt64, 0)
+		return &DateTimeField{
+			name:           name,
+			arrayPositions: arrayPositions,
+			value:          prefixCoded,
+			options:        options,
+			// not correct, just a place holder until we revisit how fields are
+			// represented and can fix this better
+			numPlainTextBytes: uint64(8),
+		}, nil
+	}
+	return nil, fmt.Errorf("cannot represent %s in this type", dt)
+}
+
+func canRepresent(dt time.Time) bool {
+	if dt.Before(MinTimeRepresentable) || dt.After(MaxTimeRepresentable) {
+		return false
+	}
+	return true
+}

vendor/github.com/blevesearch/bleve/document/field_numeric.go

@@ -0,0 +1,130 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package document
+
+import (
+	"fmt"
+
+	"github.com/blevesearch/bleve/analysis"
+	"github.com/blevesearch/bleve/numeric"
+)
+
+const DefaultNumericIndexingOptions = StoreField | IndexField
+
+const DefaultPrecisionStep uint = 4
+
+type NumericField struct {
+	name              string
+	arrayPositions    []uint64
+	options           IndexingOptions
+	value             numeric.PrefixCoded
+	numPlainTextBytes uint64
+}
+
+func (n *NumericField) Name() string {
+	return n.name
+}
+
+func (n *NumericField) ArrayPositions() []uint64 {
+	return n.arrayPositions
+}
+
+func (n *NumericField) Options() IndexingOptions {
+	return n.options
+}
+
+func (n *NumericField) Analyze() (int, analysis.TokenFrequencies) {
+	tokens := make(analysis.TokenStream, 0)
+	tokens = append(tokens, &analysis.Token{
+		Start:    0,
+		End:      len(n.value),
+		Term:     n.value,
+		Position: 1,
+		Type:     analysis.Numeric,
+	})
+
+	original, err := n.value.Int64()
+	if err == nil {
+
+		shift := DefaultPrecisionStep
+		for shift < 64 {
+			shiftEncoded, err := numeric.NewPrefixCodedInt64(original, shift)
+			if err != nil {
+				break
+			}
+			token := analysis.Token{
+				Start:    0,
+				End:      len(shiftEncoded),
+				Term:     shiftEncoded,
+				Position: 1,
+				Type:     analysis.Numeric,
+			}
+			tokens = append(tokens, &token)
+			shift += DefaultPrecisionStep
+		}
+	}
+
+	fieldLength := len(tokens)
+	tokenFreqs := analysis.TokenFrequency(tokens, n.arrayPositions, n.options.IncludeTermVectors())
+	return fieldLength, tokenFreqs
+}
+
+func (n *NumericField) Value() []byte {
+	return n.value
+}
+
+func (n *NumericField) Number() (float64, error) {
+	i64, err := n.value.Int64()
+	if err != nil {
+		return 0.0, err
+	}
+	return numeric.Int64ToFloat64(i64), nil
+}
+
+func (n *NumericField) GoString() string {
+	return fmt.Sprintf("&document.NumericField{Name:%s, Options: %s, Value: %s}", n.name, n.options, n.value)
+}
+
+func (n *NumericField) NumPlainTextBytes() uint64 {
+	return n.numPlainTextBytes
+}
+
+func NewNumericFieldFromBytes(name string, arrayPositions []uint64, value []byte) *NumericField {
+	return &NumericField{
+		name:              name,
+		arrayPositions:    arrayPositions,
+		value:             value,
+		options:           DefaultNumericIndexingOptions,
+		numPlainTextBytes: uint64(len(value)),
+	}
+}
+
+func NewNumericField(name string, arrayPositions []uint64, number float64) *NumericField {
+	return NewNumericFieldWithIndexingOptions(name, arrayPositions, number, DefaultNumericIndexingOptions)
+}
+
+func NewNumericFieldWithIndexingOptions(name string, arrayPositions []uint64, number float64, options IndexingOptions) *NumericField {
+	numberInt64 := numeric.Float64ToInt64(number)
+	prefixCoded := numeric.MustNewPrefixCodedInt64(numberInt64, 0)
+	return &NumericField{
+		name:           name,
+		arrayPositions: arrayPositions,
+		value:          prefixCoded,
+		options:        options,
+		// not correct, just a place holder until we revisit how fields are
+		// represented and can fix this better
+		numPlainTextBytes: uint64(8),
+	}
+}

vendor/github.com/blevesearch/bleve/document/field_text.go

@@ -0,0 +1,119 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package document
+
+import (
+	"fmt"
+
+	"github.com/blevesearch/bleve/analysis"
+)
+
+const DefaultTextIndexingOptions = IndexField
+
+type TextField struct {
+	name              string
+	arrayPositions    []uint64
+	options           IndexingOptions
+	analyzer          *analysis.Analyzer
+	value             []byte
+	numPlainTextBytes uint64
+}
+
+func (t *TextField) Name() string {
+	return t.name
+}
+
+func (t *TextField) ArrayPositions() []uint64 {
+	return t.arrayPositions
+}
+
+func (t *TextField) Options() IndexingOptions {
+	return t.options
+}
+
+func (t *TextField) Analyze() (int, analysis.TokenFrequencies) {
+	var tokens analysis.TokenStream
+	if t.analyzer != nil {
+		bytesToAnalyze := t.Value()
+		if t.options.IsStored() {
+			// need to copy
+			bytesCopied := make([]byte, len(bytesToAnalyze))
+			copy(bytesCopied, bytesToAnalyze)
+			bytesToAnalyze = bytesCopied
+		}
+		tokens = t.analyzer.Analyze(bytesToAnalyze)
+	} else {
+		tokens = analysis.TokenStream{
+			&analysis.Token{
+				Start:    0,
+				End:      len(t.value),
+				Term:     t.value,
+				Position: 1,
+				Type:     analysis.AlphaNumeric,
+			},
+		}
+	}
+	fieldLength := len(tokens) // number of tokens in this doc field
+	tokenFreqs := analysis.TokenFrequency(tokens, t.arrayPositions, t.options.IncludeTermVectors())
+	return fieldLength, tokenFreqs
+}
+
+func (t *TextField) Value() []byte {
+	return t.value
+}
+
+func (t *TextField) GoString() string {
+	return fmt.Sprintf("&document.TextField{Name:%s, Options: %s, Analyzer: %v, Value: %s, ArrayPositions: %v}", t.name, t.options, t.analyzer, t.value, t.arrayPositions)
+}
+
+func (t *TextField) NumPlainTextBytes() uint64 {
+	return t.numPlainTextBytes
+}
+
+func NewTextField(name string, arrayPositions []uint64, value []byte) *TextField {
+	return NewTextFieldWithIndexingOptions(name, arrayPositions, value, DefaultTextIndexingOptions)
+}
+
+func NewTextFieldWithIndexingOptions(name string, arrayPositions []uint64, value []byte, options IndexingOptions) *TextField {
+	return &TextField{
+		name:              name,
+		arrayPositions:    arrayPositions,
+		options:           options,
+		value:             value,
+		numPlainTextBytes: uint64(len(value)),
+	}
+}
+
+func NewTextFieldWithAnalyzer(name string, arrayPositions []uint64, value []byte, analyzer *analysis.Analyzer) *TextField {
+	return &TextField{
+		name:              name,
+		arrayPositions:    arrayPositions,
+		options:           DefaultTextIndexingOptions,
+		analyzer:          analyzer,
+		value:             value,
+		numPlainTextBytes: uint64(len(value)),
+	}
+}
+
+func NewTextFieldCustom(name string, arrayPositions []uint64, value []byte, options IndexingOptions, analyzer *analysis.Analyzer) *TextField {
+	return &TextField{
+		name:              name,
+		arrayPositions:    arrayPositions,
+		options:           options,
+		analyzer:          analyzer,
+		value:             value,
+		numPlainTextBytes: uint64(len(value)),
+	}
+}

vendor/github.com/blevesearch/bleve/document/indexing_options.go

@@ -0,0 +1,55 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package document
+
+type IndexingOptions int
+
+const (
+	IndexField IndexingOptions = 1 << iota
+	StoreField
+	IncludeTermVectors
+)
+
+func (o IndexingOptions) IsIndexed() bool {
+	return o&IndexField != 0
+}
+
+func (o IndexingOptions) IsStored() bool {
+	return o&StoreField != 0
+}
+
+func (o IndexingOptions) IncludeTermVectors() bool {
+	return o&IncludeTermVectors != 0
+}
+
+func (o IndexingOptions) String() string {
+	rv := ""
+	if o.IsIndexed() {
+		rv += "INDEXED"
+	}
+	if o.IsStored() {
+		if rv != "" {
+			rv += ", "
+		}
+		rv += "STORE"
+	}
+	if o.IncludeTermVectors() {
+		if rv != "" {
+			rv += ", "
+		}
+		rv += "TV"
+	}
+	return rv
+}

vendor/github.com/blevesearch/bleve/error.go

@@ -0,0 +1,52 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package bleve
+
+// Constant Error values which can be compared to determine the type of error
+const (
+	ErrorIndexPathExists Error = iota
+	ErrorIndexPathDoesNotExist
+	ErrorIndexMetaMissing
+	ErrorIndexMetaCorrupt
+	ErrorUnknownStorageType
+	ErrorIndexClosed
+	ErrorAliasMulti
+	ErrorAliasEmpty
+	ErrorUnknownIndexType
+	ErrorEmptyID
+	ErrorIndexReadInconsistency
+)
+
+// Error represents a more strongly typed bleve error for detecting
+// and handling specific types of errors.
+type Error int
+
+func (e Error) Error() string {
+	return errorMessages[e]
+}
+
+var errorMessages = map[Error]string{
+	ErrorIndexPathExists:        "cannot create new index, path already exists",
+	ErrorIndexPathDoesNotExist:  "cannot open index, path does not exist",
+	ErrorIndexMetaMissing:       "cannot open index, metadata missing",
+	ErrorIndexMetaCorrupt:       "cannot open index, metadata corrupt",
+	ErrorUnknownStorageType:     "unknown storage type",
+	ErrorIndexClosed:            "index is closed",
+	ErrorAliasMulti:             "cannot perform single index operation on multiple index alias",
+	ErrorAliasEmpty:             "cannot perform operation on empty alias",
+	ErrorUnknownIndexType:       "unknown index type",
+	ErrorEmptyID:                "document ID cannot be empty",
+	ErrorIndexReadInconsistency: "index read inconsistency detected",
+}

vendor/github.com/blevesearch/bleve/index.go

@@ -0,0 +1,243 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package bleve
+
+import (
+	"github.com/blevesearch/bleve/document"
+	"github.com/blevesearch/bleve/index"
+	"github.com/blevesearch/bleve/index/store"
+	"github.com/blevesearch/bleve/mapping"
+	"golang.org/x/net/context"
+)
+
+// A Batch groups together multiple Index and Delete
+// operations you would like performed at the same
+// time.  The Batch structure is NOT thread-safe.
+// You should only perform operations on a batch
+// from a single thread at a time.  Once batch
+// execution has started, you may not modify it.
+type Batch struct {
+	index    Index
+	internal *index.Batch
+}
+
+// Index adds the specified index operation to the
+// batch.  NOTE: the bleve Index is not updated
+// until the batch is executed.
+func (b *Batch) Index(id string, data interface{}) error {
+	if id == "" {
+		return ErrorEmptyID
+	}
+	doc := document.NewDocument(id)
+	err := b.index.Mapping().MapDocument(doc, data)
+	if err != nil {
+		return err
+	}
+	b.internal.Update(doc)
+	return nil
+}
+
+// Delete adds the specified delete operation to the
+// batch.  NOTE: the bleve Index is not updated until
+// the batch is executed.
+func (b *Batch) Delete(id string) {
+	if id != "" {
+		b.internal.Delete(id)
+	}
+}
+
+// SetInternal adds the specified set internal
+// operation to the batch. NOTE: the bleve Index is
+// not updated until the batch is executed.
+func (b *Batch) SetInternal(key, val []byte) {
+	b.internal.SetInternal(key, val)
+}
+
+// SetInternal adds the specified delete internal
+// operation to the batch. NOTE: the bleve Index is
+// not updated until the batch is executed.
+func (b *Batch) DeleteInternal(key []byte) {
+	b.internal.DeleteInternal(key)
+}
+
+// Size returns the total number of operations inside the batch
+// including normal index operations and internal operations.
+func (b *Batch) Size() int {
+	return len(b.internal.IndexOps) + len(b.internal.InternalOps)
+}
+
+// String prints a user friendly string representation of what
+// is inside this batch.
+func (b *Batch) String() string {
+	return b.internal.String()
+}
+
+// Reset returns a Batch to the empty state so that it can
+// be re-used in the future.
+func (b *Batch) Reset() {
+	b.internal.Reset()
+}
+
+// An Index implements all the indexing and searching
+// capabilities of bleve.  An Index can be created
+// using the New() and Open() methods.
+//
+// Index() takes an input value, deduces a DocumentMapping for its type,
+// assigns string paths to its fields or values then applies field mappings on
+// them.
+//
+// The DocumentMapping used to index a value is deduced by the following rules:
+// 1) If value implements Classifier interface, resolve the mapping from Type().
+// 2) If value has a string field or value at IndexMapping.TypeField.
+// (defaulting to "_type"), use it to resolve the mapping. Fields addressing
+// is described below.
+// 3) If IndexMapping.DefaultType is registered, return it.
+// 4) Return IndexMapping.DefaultMapping.
+//
+// Each field or nested field of the value is identified by a string path, then
+// mapped to one or several FieldMappings which extract the result for analysis.
+//
+// Struct values fields are identified by their "json:" tag, or by their name.
+// Nested fields are identified by prefixing with their parent identifier,
+// separated by a dot.
+//
+// Map values entries are identified by their string key. Entries not indexed
+// by strings are ignored. Entry values are identified recursively like struct
+// fields.
+//
+// Slice and array values are identified by their field name. Their elements
+// are processed sequentially with the same FieldMapping.
+//
+// String, float64 and time.Time values are identified by their field name.
+// Other types are ignored.
+//
+// Each value identifier is decomposed in its parts and recursively address
+// SubDocumentMappings in the tree starting at the root DocumentMapping.  If a
+// mapping is found, all its FieldMappings are applied to the value. If no
+// mapping is found and the root DocumentMapping is dynamic, default mappings
+// are used based on value type and IndexMapping default configurations.
+//
+// Finally, mapped values are analyzed, indexed or stored. See
+// FieldMapping.Analyzer to know how an analyzer is resolved for a given field.
+//
+// Examples:
+//
+//  type Date struct {
+//    Day string `json:"day"`
+//    Month string
+//    Year string
+//  }
+//
+//  type Person struct {
+//    FirstName string `json:"first_name"`
+//    LastName string
+//    BirthDate Date `json:"birth_date"`
+//  }
+//
+// A Person value FirstName is mapped by the SubDocumentMapping at
+// "first_name". Its LastName is mapped by the one at "LastName". The day of
+// BirthDate is mapped to the SubDocumentMapping "day" of the root
+// SubDocumentMapping "birth_date". It will appear as the "birth_date.day"
+// field in the index. The month is mapped to "birth_date.Month".
+type Index interface {
+	// Index analyzes, indexes or stores mapped data fields. Supplied
+	// identifier is bound to analyzed data and will be retrieved by search
+	// requests. See Index interface documentation for details about mapping
+	// rules.
+	Index(id string, data interface{}) error
+	Delete(id string) error
+
+	NewBatch() *Batch
+	Batch(b *Batch) error
+
+	// Document returns specified document or nil if the document is not
+	// indexed or stored.
+	Document(id string) (*document.Document, error)
+	// DocCount returns the number of documents in the index.
+	DocCount() (uint64, error)
+
+	Search(req *SearchRequest) (*SearchResult, error)
+	SearchInContext(ctx context.Context, req *SearchRequest) (*SearchResult, error)
+
+	Fields() ([]string, error)
+
+	FieldDict(field string) (index.FieldDict, error)
+	FieldDictRange(field string, startTerm []byte, endTerm []byte) (index.FieldDict, error)
+	FieldDictPrefix(field string, termPrefix []byte) (index.FieldDict, error)
+
+	Close() error
+
+	Mapping() mapping.IndexMapping
+
+	Stats() *IndexStat
+	StatsMap() map[string]interface{}
+
+	GetInternal(key []byte) ([]byte, error)
+	SetInternal(key, val []byte) error
+	DeleteInternal(key []byte) error
+
+	// Name returns the name of the index (by default this is the path)
+	Name() string
+	// SetName lets you assign your own logical name to this index
+	SetName(string)
+
+	// Advanced returns the indexer and data store, exposing lower level
+	// methods to enumerate records and access data.
+	Advanced() (index.Index, store.KVStore, error)
+}
+
+// New index at the specified path, must not exist.
+// The provided mapping will be used for all
+// Index/Search operations.
+func New(path string, mapping mapping.IndexMapping) (Index, error) {
+	return newIndexUsing(path, mapping, Config.DefaultIndexType, Config.DefaultKVStore, nil)
+}
+
+// NewMemOnly creates a memory-only index.
+// The contents of the index is NOT persisted,
+// and will be lost once closed.
+// The provided mapping will be used for all
+// Index/Search operations.
+func NewMemOnly(mapping mapping.IndexMapping) (Index, error) {
+	return newIndexUsing("", mapping, Config.DefaultIndexType, Config.DefaultMemKVStore, nil)
+}
+
+// NewUsing creates index at the specified path,
+// which must not already exist.
+// The provided mapping will be used for all
+// Index/Search operations.
+// The specified index type will be used.
+// The specified kvstore implementation will be used
+// and the provided kvconfig will be passed to its
+// constructor. Note that currently the values of kvconfig must
+// be able to be marshaled and unmarshaled using the encoding/json library (used
+// when reading/writing the index metadata file).
+func NewUsing(path string, mapping mapping.IndexMapping, indexType string, kvstore string, kvconfig map[string]interface{}) (Index, error) {
+	return newIndexUsing(path, mapping, indexType, kvstore, kvconfig)
+}
+
+// Open index at the specified path, must exist.
+// The mapping used when it was created will be used for all Index/Search operations.
+func Open(path string) (Index, error) {
+	return openIndexUsing(path, nil)
+}
+
+// OpenUsing opens index at the specified path, must exist.
+// The mapping used when it was created will be used for all Index/Search operations.
+// The provided runtimeConfig can override settings
+// persisted when the kvstore was created.
+func OpenUsing(path string, runtimeConfig map[string]interface{}) (Index, error) {
+	return openIndexUsing(path, runtimeConfig)
+}

vendor/github.com/blevesearch/bleve/index/analysis.go

@@ -0,0 +1,83 @@
+//  Copyright (c) 2015 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package index
+
+import "github.com/blevesearch/bleve/document"
+
+type IndexRow interface {
+	KeySize() int
+	KeyTo([]byte) (int, error)
+	Key() []byte
+
+	ValueSize() int
+	ValueTo([]byte) (int, error)
+	Value() []byte
+}
+
+type AnalysisResult struct {
+	DocID string
+	Rows  []IndexRow
+}
+
+type AnalysisWork struct {
+	i  Index
+	d  *document.Document
+	rc chan *AnalysisResult
+}
+
+func NewAnalysisWork(i Index, d *document.Document, rc chan *AnalysisResult) *AnalysisWork {
+	return &AnalysisWork{
+		i:  i,
+		d:  d,
+		rc: rc,
+	}
+}
+
+type AnalysisQueue struct {
+	queue chan *AnalysisWork
+	done  chan struct{}
+}
+
+func (q *AnalysisQueue) Queue(work *AnalysisWork) {
+	q.queue <- work
+}
+
+func (q *AnalysisQueue) Close() {
+	close(q.done)
+}
+
+func NewAnalysisQueue(numWorkers int) *AnalysisQueue {
+	rv := AnalysisQueue{
+		queue: make(chan *AnalysisWork),
+		done:  make(chan struct{}),
+	}
+	for i := 0; i < numWorkers; i++ {
+		go AnalysisWorker(rv)
+	}
+	return &rv
+}
+
+func AnalysisWorker(q AnalysisQueue) {
+	// read work off the queue
+	for {
+		select {
+		case <-q.done:
+			return
+		case w := <-q.queue:
+			r := w.i.Analyze(w.d)
+			w.rc <- r
+		}
+	}
+}

vendor/github.com/blevesearch/bleve/index/field_cache.go

@@ -0,0 +1,88 @@
+//  Copyright (c) 2015 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package index
+
+import (
+	"sync"
+)
+
+type FieldCache struct {
+	fieldIndexes   map[string]uint16
+	indexFields    []string
+	lastFieldIndex int
+	mutex          sync.RWMutex
+}
+
+func NewFieldCache() *FieldCache {
+	return &FieldCache{
+		fieldIndexes:   make(map[string]uint16),
+		lastFieldIndex: -1,
+	}
+}
+
+func (f *FieldCache) AddExisting(field string, index uint16) {
+	f.mutex.Lock()
+	f.addLOCKED(field, index)
+	f.mutex.Unlock()
+}
+
+func (f *FieldCache) addLOCKED(field string, index uint16) uint16 {
+	f.fieldIndexes[field] = index
+	if len(f.indexFields) < int(index)+1 {
+		prevIndexFields := f.indexFields
+		f.indexFields = make([]string, int(index)+16)
+		copy(f.indexFields, prevIndexFields)
+	}
+	f.indexFields[int(index)] = field
+	if int(index) > f.lastFieldIndex {
+		f.lastFieldIndex = int(index)
+	}
+	return index
+}
+
+// FieldNamed returns the index of the field, and whether or not it existed
+// before this call.  if createIfMissing is true, and new field index is assigned
+// but the second return value will still be false
+func (f *FieldCache) FieldNamed(field string, createIfMissing bool) (uint16, bool) {
+	f.mutex.RLock()
+	if index, ok := f.fieldIndexes[field]; ok {
+		f.mutex.RUnlock()
+		return index, true
+	} else if !createIfMissing {
+		f.mutex.RUnlock()
+		return 0, false
+	}
+	// trade read lock for write lock
+	f.mutex.RUnlock()
+	f.mutex.Lock()
+	// need to check again with write lock
+	if index, ok := f.fieldIndexes[field]; ok {
+		f.mutex.Unlock()
+		return index, true
+	}
+	// assign next field id
+	index := f.addLOCKED(field, uint16(f.lastFieldIndex+1))
+	f.mutex.Unlock()
+	return index, false
+}
+
+func (f *FieldCache) FieldIndexed(index uint16) (field string) {
+	f.mutex.RLock()
+	if int(index) < len(f.indexFields) {
+		field = f.indexFields[int(index)]
+	}
+	f.mutex.RUnlock()
+	return field
+}

vendor/github.com/blevesearch/bleve/index/index.go

@@ -0,0 +1,239 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package index
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+
+	"github.com/blevesearch/bleve/document"
+	"github.com/blevesearch/bleve/index/store"
+)
+
+var ErrorUnknownStorageType = fmt.Errorf("unknown storage type")
+
+type Index interface {
+	Open() error
+	Close() error
+
+	Update(doc *document.Document) error
+	Delete(id string) error
+	Batch(batch *Batch) error
+
+	SetInternal(key, val []byte) error
+	DeleteInternal(key []byte) error
+
+	// Reader returns a low-level accessor on the index data. Close it to
+	// release associated resources.
+	Reader() (IndexReader, error)
+
+	Stats() json.Marshaler
+	StatsMap() map[string]interface{}
+
+	Analyze(d *document.Document) *AnalysisResult
+
+	Advanced() (store.KVStore, error)
+}
+
+type IndexReader interface {
+	TermFieldReader(term []byte, field string, includeFreq, includeNorm, includeTermVectors bool) (TermFieldReader, error)
+
+	// DocIDReader returns an iterator over all doc ids
+	// The caller must close returned instance to release associated resources.
+	DocIDReaderAll() (DocIDReader, error)
+
+	DocIDReaderOnly(ids []string) (DocIDReader, error)
+
+	FieldDict(field string) (FieldDict, error)
+
+	// FieldDictRange is currently defined to include the start and end terms
+	FieldDictRange(field string, startTerm []byte, endTerm []byte) (FieldDict, error)
+	FieldDictPrefix(field string, termPrefix []byte) (FieldDict, error)
+
+	Document(id string) (*document.Document, error)
+	DocumentFieldTerms(id IndexInternalID, fields []string) (FieldTerms, error)
+
+	Fields() ([]string, error)
+
+	GetInternal(key []byte) ([]byte, error)
+
+	DocCount() (uint64, error)
+
+	ExternalID(id IndexInternalID) (string, error)
+	InternalID(id string) (IndexInternalID, error)
+
+	DumpAll() chan interface{}
+	DumpDoc(id string) chan interface{}
+	DumpFields() chan interface{}
+
+	Close() error
+}
+
+// FieldTerms contains the terms used by a document, keyed by field
+type FieldTerms map[string][]string
+
+// FieldsNotYetCached returns a list of fields not yet cached out of a larger list of fields
+func (f FieldTerms) FieldsNotYetCached(fields []string) []string {
+	rv := make([]string, 0, len(fields))
+	for _, field := range fields {
+		if _, ok := f[field]; !ok {
+			rv = append(rv, field)
+		}
+	}
+	return rv
+}
+
+// Merge will combine two FieldTerms
+// it assumes that the terms lists are complete (thus do not need to be merged)
+// field terms from the other list always replace the ones in the receiver
+func (f FieldTerms) Merge(other FieldTerms) {
+	for field, terms := range other {
+		f[field] = terms
+	}
+}
+
+type TermFieldVector struct {
+	Field          string
+	ArrayPositions []uint64
+	Pos            uint64
+	Start          uint64
+	End            uint64
+}
+
+// IndexInternalID is an opaque document identifier interal to the index impl
+type IndexInternalID []byte
+
+func (id IndexInternalID) Equals(other IndexInternalID) bool {
+	return id.Compare(other) == 0
+}
+
+func (id IndexInternalID) Compare(other IndexInternalID) int {
+	return bytes.Compare(id, other)
+}
+
+type TermFieldDoc struct {
+	Term    string
+	ID      IndexInternalID
+	Freq    uint64
+	Norm    float64
+	Vectors []*TermFieldVector
+}
+
+// Reset allows an already allocated TermFieldDoc to be reused
+func (tfd *TermFieldDoc) Reset() *TermFieldDoc {
+	// remember the []byte used for the ID
+	id := tfd.ID
+	// idiom to copy over from empty TermFieldDoc (0 allocations)
+	*tfd = TermFieldDoc{}
+	// reuse the []byte already allocated (and reset len to 0)
+	tfd.ID = id[:0]
+	return tfd
+}
+
+// TermFieldReader is the interface exposing the enumeration of documents
+// containing a given term in a given field. Documents are returned in byte
+// lexicographic order over their identifiers.
+type TermFieldReader interface {
+	// Next returns the next document containing the term in this field, or nil
+	// when it reaches the end of the enumeration.  The preAlloced TermFieldDoc
+	// is optional, and when non-nil, will be used instead of allocating memory.
+	Next(preAlloced *TermFieldDoc) (*TermFieldDoc, error)
+
+	// Advance resets the enumeration at specified document or its immediate
+	// follower.
+	Advance(ID IndexInternalID, preAlloced *TermFieldDoc) (*TermFieldDoc, error)
+
+	// Count returns the number of documents contains the term in this field.
+	Count() uint64
+	Close() error
+}
+
+type DictEntry struct {
+	Term  string
+	Count uint64
+}
+
+type FieldDict interface {
+	Next() (*DictEntry, error)
+	Close() error
+}
+
+// DocIDReader is the interface exposing enumeration of documents identifiers.
+// Close the reader to release associated resources.
+type DocIDReader interface {
+	// Next returns the next document internal identifier in the natural
+	// index order, nil when the end of the sequence is reached.
+	Next() (IndexInternalID, error)
+
+	// Advance resets the iteration to the first internal identifier greater than
+	// or equal to ID. If ID is smaller than the start of the range, the iteration
+	// will start there instead. If ID is greater than or equal to the end of
+	// the range, Next() call will return io.EOF.
+	Advance(ID IndexInternalID) (IndexInternalID, error)
+	Close() error
+}
+
+type Batch struct {
+	IndexOps    map[string]*document.Document
+	InternalOps map[string][]byte
+}
+
+func NewBatch() *Batch {
+	return &Batch{
+		IndexOps:    make(map[string]*document.Document),
+		InternalOps: make(map[string][]byte),
+	}
+}
+
+func (b *Batch) Update(doc *document.Document) {
+	b.IndexOps[doc.ID] = doc
+}
+
+func (b *Batch) Delete(id string) {
+	b.IndexOps[id] = nil
+}
+
+func (b *Batch) SetInternal(key, val []byte) {
+	b.InternalOps[string(key)] = val
+}
+
+func (b *Batch) DeleteInternal(key []byte) {
+	b.InternalOps[string(key)] = nil
+}
+
+func (b *Batch) String() string {
+	rv := fmt.Sprintf("Batch (%d ops, %d internal ops)\n", len(b.IndexOps), len(b.InternalOps))
+	for k, v := range b.IndexOps {
+		if v != nil {
+			rv += fmt.Sprintf("\tINDEX - '%s'\n", k)
+		} else {
+			rv += fmt.Sprintf("\tDELETE - '%s'\n", k)
+		}
+	}
+	for k, v := range b.InternalOps {
+		if v != nil {
+			rv += fmt.Sprintf("\tSET INTERNAL - '%s'\n", k)
+		} else {
+			rv += fmt.Sprintf("\tDELETE INTERNAL - '%s'\n", k)
+		}
+	}
+	return rv
+}
+
+func (b *Batch) Reset() {
+	b.IndexOps = make(map[string]*document.Document)
+	b.InternalOps = make(map[string][]byte)
+}

vendor/github.com/blevesearch/bleve/index/store/batch.go

@@ -0,0 +1,62 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package store
+
+type op struct {
+	K []byte
+	V []byte
+}
+
+type EmulatedBatch struct {
+	Ops    []*op
+	Merger *EmulatedMerge
+}
+
+func NewEmulatedBatch(mo MergeOperator) *EmulatedBatch {
+	return &EmulatedBatch{
+		Ops:    make([]*op, 0, 1000),
+		Merger: NewEmulatedMerge(mo),
+	}
+}
+
+func (b *EmulatedBatch) Set(key, val []byte) {
+	ck := make([]byte, len(key))
+	copy(ck, key)
+	cv := make([]byte, len(val))
+	copy(cv, val)
+	b.Ops = append(b.Ops, &op{ck, cv})
+}
+
+func (b *EmulatedBatch) Delete(key []byte) {
+	ck := make([]byte, len(key))
+	copy(ck, key)
+	b.Ops = append(b.Ops, &op{ck, nil})
+}
+
+func (b *EmulatedBatch) Merge(key, val []byte) {
+	ck := make([]byte, len(key))
+	copy(ck, key)
+	cv := make([]byte, len(val))
+	copy(cv, val)
+	b.Merger.Merge(key, val)
+}
+
+func (b *EmulatedBatch) Reset() {
+	b.Ops = b.Ops[:0]
+}
+
+func (b *EmulatedBatch) Close() error {
+	return nil
+}

vendor/github.com/blevesearch/bleve/index/store/boltdb/iterator.go

@@ -0,0 +1,85 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package boltdb
+
+import (
+	"bytes"
+
+	"github.com/boltdb/bolt"
+)
+
+type Iterator struct {
+	store  *Store
+	tx     *bolt.Tx
+	cursor *bolt.Cursor
+	prefix []byte
+	start  []byte
+	end    []byte
+	valid  bool
+	key    []byte
+	val    []byte
+}
+
+func (i *Iterator) updateValid() {
+	i.valid = (i.key != nil)
+	if i.valid {
+		if i.prefix != nil {
+			i.valid = bytes.HasPrefix(i.key, i.prefix)
+		} else if i.end != nil {
+			i.valid = bytes.Compare(i.key, i.end) < 0
+		}
+	}
+}
+
+func (i *Iterator) Seek(k []byte) {
+	if i.start != nil && bytes.Compare(k, i.start) < 0 {
+		k = i.start
+	}
+	if i.prefix != nil && !bytes.HasPrefix(k, i.prefix) {
+		if bytes.Compare(k, i.prefix) < 0 {
+			k = i.prefix
+		} else {
+			i.valid = false
+			return
+		}
+	}
+	i.key, i.val = i.cursor.Seek(k)
+	i.updateValid()
+}
+
+func (i *Iterator) Next() {
+	i.key, i.val = i.cursor.Next()
+	i.updateValid()
+}
+
+func (i *Iterator) Current() ([]byte, []byte, bool) {
+	return i.key, i.val, i.valid
+}
+
+func (i *Iterator) Key() []byte {
+	return i.key
+}
+
+func (i *Iterator) Value() []byte {
+	return i.val
+}
+
+func (i *Iterator) Valid() bool {
+	return i.valid
+}
+
+func (i *Iterator) Close() error {
+	return nil
+}

vendor/github.com/blevesearch/bleve/index/store/boltdb/reader.go

@@ -0,0 +1,73 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package boltdb
+
+import (
+	"github.com/blevesearch/bleve/index/store"
+	"github.com/boltdb/bolt"
+)
+
+type Reader struct {
+	store  *Store
+	tx     *bolt.Tx
+	bucket *bolt.Bucket
+}
+
+func (r *Reader) Get(key []byte) ([]byte, error) {
+	var rv []byte
+	v := r.bucket.Get(key)
+	if v != nil {
+		rv = make([]byte, len(v))
+		copy(rv, v)
+	}
+	return rv, nil
+}
+
+func (r *Reader) MultiGet(keys [][]byte) ([][]byte, error) {
+	return store.MultiGet(r, keys)
+}
+
+func (r *Reader) PrefixIterator(prefix []byte) store.KVIterator {
+	cursor := r.bucket.Cursor()
+
+	rv := &Iterator{
+		store:  r.store,
+		tx:     r.tx,
+		cursor: cursor,
+		prefix: prefix,
+	}
+
+	rv.Seek(prefix)
+	return rv
+}
+
+func (r *Reader) RangeIterator(start, end []byte) store.KVIterator {
+	cursor := r.bucket.Cursor()
+
+	rv := &Iterator{
+		store:  r.store,
+		tx:     r.tx,
+		cursor: cursor,
+		start:  start,
+		end:    end,
+	}
+
+	rv.Seek(start)
+	return rv
+}
+
+func (r *Reader) Close() error {
+	return r.tx.Rollback()
+}

vendor/github.com/blevesearch/bleve/index/store/boltdb/stats.go

@@ -0,0 +1,26 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package boltdb
+
+import "encoding/json"
+
+type stats struct {
+	s *Store
+}
+
+func (s *stats) MarshalJSON() ([]byte, error) {
+	bs := s.s.db.Stats()
+	return json.Marshal(bs)
+}

vendor/github.com/blevesearch/bleve/index/store/boltdb/store.go

@@ -0,0 +1,175 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package boltdb implements a store.KVStore on top of BoltDB. It supports the
+// following options:
+//
+// "bucket" (string): the name of BoltDB bucket to use, defaults to "bleve".
+//
+// "nosync" (bool): if true, set boltdb.DB.NoSync to true. It speeds up index
+// operations in exchange of losing integrity guarantees if indexation aborts
+// without closing the index. Use it when rebuilding indexes from zero.
+package boltdb
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"os"
+
+	"github.com/blevesearch/bleve/index/store"
+	"github.com/blevesearch/bleve/registry"
+	"github.com/boltdb/bolt"
+)
+
+const (
+	Name                    = "boltdb"
+	defaultCompactBatchSize = 100
+)
+
+type Store struct {
+	path        string
+	bucket      string
+	db          *bolt.DB
+	noSync      bool
+	fillPercent float64
+	mo          store.MergeOperator
+}
+
+func New(mo store.MergeOperator, config map[string]interface{}) (store.KVStore, error) {
+	path, ok := config["path"].(string)
+	if !ok {
+		return nil, fmt.Errorf("must specify path")
+	}
+	if path == "" {
+		return nil, os.ErrInvalid
+	}
+
+	bucket, ok := config["bucket"].(string)
+	if !ok {
+		bucket = "bleve"
+	}
+
+	noSync, _ := config["nosync"].(bool)
+
+	fillPercent, ok := config["fillPercent"].(float64)
+	if !ok {
+		fillPercent = bolt.DefaultFillPercent
+	}
+
+	bo := &bolt.Options{}
+	ro, ok := config["read_only"].(bool)
+	if ok {
+		bo.ReadOnly = ro
+	}
+
+	db, err := bolt.Open(path, 0600, bo)
+	if err != nil {
+		return nil, err
+	}
+	db.NoSync = noSync
+
+	if !bo.ReadOnly {
+		err = db.Update(func(tx *bolt.Tx) error {
+			_, err := tx.CreateBucketIfNotExists([]byte(bucket))
+
+			return err
+		})
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	rv := Store{
+		path:        path,
+		bucket:      bucket,
+		db:          db,
+		mo:          mo,
+		noSync:      noSync,
+		fillPercent: fillPercent,
+	}
+	return &rv, nil
+}
+
+func (bs *Store) Close() error {
+	return bs.db.Close()
+}
+
+func (bs *Store) Reader() (store.KVReader, error) {
+	tx, err := bs.db.Begin(false)
+	if err != nil {
+		return nil, err
+	}
+	return &Reader{
+		store:  bs,
+		tx:     tx,
+		bucket: tx.Bucket([]byte(bs.bucket)),
+	}, nil
+}
+
+func (bs *Store) Writer() (store.KVWriter, error) {
+	return &Writer{
+		store: bs,
+	}, nil
+}
+
+func (bs *Store) Stats() json.Marshaler {
+	return &stats{
+		s: bs,
+	}
+}
+
+// CompactWithBatchSize removes DictionaryTerm entries with a count of zero (in batchSize batches)
+// Removing entries is a workaround for github issue #374.
+func (bs *Store) CompactWithBatchSize(batchSize int) error {
+	for {
+		cnt := 0
+		err := bs.db.Batch(func(tx *bolt.Tx) error {
+			c := tx.Bucket([]byte(bs.bucket)).Cursor()
+			prefix := []byte("d")
+
+			for k, v := c.Seek(prefix); bytes.HasPrefix(k, prefix); k, v = c.Next() {
+				if bytes.Equal(v, []byte{0}) {
+					cnt++
+					if err := c.Delete(); err != nil {
+						return err
+					}
+					if cnt == batchSize {
+						break
+					}
+				}
+
+			}
+			return nil
+		})
+		if err != nil {
+			return err
+		}
+
+		if cnt == 0 {
+			break
+		}
+	}
+	return nil
+}
+
+// Compact calls CompactWithBatchSize with a default batch size of 100.  This is a workaround
+// for github issue #374.
+func (bs *Store) Compact() error {
+	return bs.CompactWithBatchSize(defaultCompactBatchSize)
+}
+
+func init() {
+	registry.RegisterKVStore(Name, New)
+}

vendor/github.com/blevesearch/bleve/index/store/boltdb/writer.go

@@ -0,0 +1,95 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package boltdb
+
+import (
+	"fmt"
+
+	"github.com/blevesearch/bleve/index/store"
+)
+
+type Writer struct {
+	store *Store
+}
+
+func (w *Writer) NewBatch() store.KVBatch {
+	return store.NewEmulatedBatch(w.store.mo)
+}
+
+func (w *Writer) NewBatchEx(options store.KVBatchOptions) ([]byte, store.KVBatch, error) {
+	return make([]byte, options.TotalBytes), w.NewBatch(), nil
+}
+
+func (w *Writer) ExecuteBatch(batch store.KVBatch) (err error) {
+
+	emulatedBatch, ok := batch.(*store.EmulatedBatch)
+	if !ok {
+		return fmt.Errorf("wrong type of batch")
+	}
+
+	tx, err := w.store.db.Begin(true)
+	if err != nil {
+		return
+	}
+	// defer function to ensure that once started,
+	// we either Commit tx or Rollback
+	defer func() {
+		// if nothing went wrong, commit
+		if err == nil {
+			// careful to catch error here too
+			err = tx.Commit()
+		} else {
+			// caller should see error that caused abort,
+			// not success or failure of Rollback itself
+			_ = tx.Rollback()
+		}
+	}()
+
+	bucket := tx.Bucket([]byte(w.store.bucket))
+	bucket.FillPercent = w.store.fillPercent
+
+	for k, mergeOps := range emulatedBatch.Merger.Merges {
+		kb := []byte(k)
+		existingVal := bucket.Get(kb)
+		mergedVal, fullMergeOk := w.store.mo.FullMerge(kb, existingVal, mergeOps)
+		if !fullMergeOk {
+			err = fmt.Errorf("merge operator returned failure")
+			return
+		}
+		err = bucket.Put(kb, mergedVal)
+		if err != nil {
+			return
+		}
+	}
+
+	for _, op := range emulatedBatch.Ops {
+		if op.V != nil {
+			err = bucket.Put(op.K, op.V)
+			if err != nil {
+				return
+			}
+		} else {
+			err = bucket.Delete(op.K)
+			if err != nil {
+				return
+			}
+		}
+	}
+	return
+}
+
+func (w *Writer) Close() error {
+	return nil
+}

vendor/github.com/blevesearch/bleve/index/store/gtreap/iterator.go

@@ -0,0 +1,152 @@
+//  Copyright (c) 2015 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package gtreap provides an in-memory implementation of the
+// KVStore interfaces using the gtreap balanced-binary treap,
+// copy-on-write data structure.
+package gtreap
+
+import (
+	"bytes"
+	"sync"
+
+	"github.com/steveyen/gtreap"
+)
+
+type Iterator struct {
+	t *gtreap.Treap
+
+	m        sync.Mutex
+	cancelCh chan struct{}
+	nextCh   chan *Item
+	curr     *Item
+	currOk   bool
+
+	prefix []byte
+	start  []byte
+	end    []byte
+}
+
+func (w *Iterator) Seek(k []byte) {
+	if w.start != nil && bytes.Compare(k, w.start) < 0 {
+		k = w.start
+	}
+	if w.prefix != nil && !bytes.HasPrefix(k, w.prefix) {
+		if bytes.Compare(k, w.prefix) < 0 {
+			k = w.prefix
+		} else {
+			var end []byte
+			for i := len(w.prefix) - 1; i >= 0; i-- {
+				c := w.prefix[i]
+				if c < 0xff {
+					end = make([]byte, i+1)
+					copy(end, w.prefix)
+					end[i] = c + 1
+					break
+				}
+			}
+			k = end
+		}
+	}
+	w.restart(&Item{k: k})
+}
+
+func (w *Iterator) restart(start *Item) *Iterator {
+	cancelCh := make(chan struct{})
+	nextCh := make(chan *Item, 1)
+
+	w.m.Lock()
+	if w.cancelCh != nil {
+		close(w.cancelCh)
+	}
+	w.cancelCh = cancelCh
+	w.nextCh = nextCh
+	w.curr = nil
+	w.currOk = false
+	w.m.Unlock()
+
+	go func() {
+		if start != nil {
+			w.t.VisitAscend(start, func(itm gtreap.Item) bool {
+				select {
+				case <-cancelCh:
+					return false
+				case nextCh <- itm.(*Item):
+					return true
+				}
+			})
+		}
+		close(nextCh)
+	}()
+
+	w.Next()
+
+	return w
+}
+
+func (w *Iterator) Next() {
+	w.m.Lock()
+	nextCh := w.nextCh
+	w.m.Unlock()
+	w.curr, w.currOk = <-nextCh
+}
+
+func (w *Iterator) Current() ([]byte, []byte, bool) {
+	w.m.Lock()
+	defer w.m.Unlock()
+	if !w.currOk || w.curr == nil {
+		return nil, nil, false
+	}
+	if w.prefix != nil && !bytes.HasPrefix(w.curr.k, w.prefix) {
+		return nil, nil, false
+	} else if w.end != nil && bytes.Compare(w.curr.k, w.end) >= 0 {
+		return nil, nil, false
+	}
+	return w.curr.k, w.curr.v, w.currOk
+}
+
+func (w *Iterator) Key() []byte {
+	k, _, ok := w.Current()
+	if !ok {
+		return nil
+	}
+	return k
+}
+
+func (w *Iterator) Value() []byte {
+	_, v, ok := w.Current()
+	if !ok {
+		return nil
+	}
+	return v
+}
+
+func (w *Iterator) Valid() bool {
+	_, _, ok := w.Current()
+	return ok
+}
+
+func (w *Iterator) Close() error {
+	w.m.Lock()
+	if w.cancelCh != nil {
+		close(w.cancelCh)
+	}
+	w.cancelCh = nil
+	w.nextCh = nil
+	w.curr = nil
+	w.currOk = false
+	w.m.Unlock()
+
+	return nil
+}

vendor/github.com/blevesearch/bleve/index/store/gtreap/reader.go

@@ -0,0 +1,66 @@
+//  Copyright (c) 2015 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package gtreap provides an in-memory implementation of the
+// KVStore interfaces using the gtreap balanced-binary treap,
+// copy-on-write data structure.
+package gtreap
+
+import (
+	"github.com/blevesearch/bleve/index/store"
+
+	"github.com/steveyen/gtreap"
+)
+
+type Reader struct {
+	t *gtreap.Treap
+}
+
+func (w *Reader) Get(k []byte) (v []byte, err error) {
+	var rv []byte
+	itm := w.t.Get(&Item{k: k})
+	if itm != nil {
+		rv = make([]byte, len(itm.(*Item).v))
+		copy(rv, itm.(*Item).v)
+		return rv, nil
+	}
+	return nil, nil
+}
+
+func (r *Reader) MultiGet(keys [][]byte) ([][]byte, error) {
+	return store.MultiGet(r, keys)
+}
+
+func (w *Reader) PrefixIterator(k []byte) store.KVIterator {
+	rv := Iterator{
+		t:      w.t,
+		prefix: k,
+	}
+	rv.restart(&Item{k: k})
+	return &rv
+}
+
+func (w *Reader) RangeIterator(start, end []byte) store.KVIterator {
+	rv := Iterator{
+		t:     w.t,
+		start: start,
+		end:   end,
+	}
+	rv.restart(&Item{k: start})
+	return &rv
+}
+
+func (w *Reader) Close() error {
+	return nil
+}

vendor/github.com/blevesearch/bleve/index/store/gtreap/store.go

@@ -0,0 +1,82 @@
+//  Copyright (c) 2015 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package gtreap provides an in-memory implementation of the
+// KVStore interfaces using the gtreap balanced-binary treap,
+// copy-on-write data structure.
+
+package gtreap
+
+import (
+	"bytes"
+	"fmt"
+	"os"
+	"sync"
+
+	"github.com/blevesearch/bleve/index/store"
+	"github.com/blevesearch/bleve/registry"
+	"github.com/steveyen/gtreap"
+)
+
+const Name = "gtreap"
+
+type Store struct {
+	m  sync.Mutex
+	t  *gtreap.Treap
+	mo store.MergeOperator
+}
+
+type Item struct {
+	k []byte
+	v []byte
+}
+
+func itemCompare(a, b interface{}) int {
+	return bytes.Compare(a.(*Item).k, b.(*Item).k)
+}
+
+func New(mo store.MergeOperator, config map[string]interface{}) (store.KVStore, error) {
+	path, ok := config["path"].(string)
+	if !ok {
+		return nil, fmt.Errorf("must specify path")
+	}
+	if path != "" {
+		return nil, os.ErrInvalid
+	}
+
+	rv := Store{
+		t:  gtreap.NewTreap(itemCompare),
+		mo: mo,
+	}
+	return &rv, nil
+}
+
+func (s *Store) Close() error {
+	return nil
+}
+
+func (s *Store) Reader() (store.KVReader, error) {
+	s.m.Lock()
+	t := s.t
+	s.m.Unlock()
+	return &Reader{t: t}, nil
+}
+
+func (s *Store) Writer() (store.KVWriter, error) {
+	return &Writer{s: s}, nil
+}
+
+func init() {
+	registry.RegisterKVStore(Name, New)
+}

vendor/github.com/blevesearch/bleve/index/store/gtreap/writer.go

@@ -0,0 +1,76 @@
+//  Copyright (c) 2015 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package gtreap provides an in-memory implementation of the
+// KVStore interfaces using the gtreap balanced-binary treap,
+// copy-on-write data structure.
+package gtreap
+
+import (
+	"fmt"
+	"math/rand"
+
+	"github.com/blevesearch/bleve/index/store"
+)
+
+type Writer struct {
+	s *Store
+}
+
+func (w *Writer) NewBatch() store.KVBatch {
+	return store.NewEmulatedBatch(w.s.mo)
+}
+
+func (w *Writer) NewBatchEx(options store.KVBatchOptions) ([]byte, store.KVBatch, error) {
+	return make([]byte, options.TotalBytes), w.NewBatch(), nil
+}
+
+func (w *Writer) ExecuteBatch(batch store.KVBatch) error {
+
+	emulatedBatch, ok := batch.(*store.EmulatedBatch)
+	if !ok {
+		return fmt.Errorf("wrong type of batch")
+	}
+
+	w.s.m.Lock()
+	for k, mergeOps := range emulatedBatch.Merger.Merges {
+		kb := []byte(k)
+		var existingVal []byte
+		existingItem := w.s.t.Get(&Item{k: kb})
+		if existingItem != nil {
+			existingVal = w.s.t.Get(&Item{k: kb}).(*Item).v
+		}
+		mergedVal, fullMergeOk := w.s.mo.FullMerge(kb, existingVal, mergeOps)
+		if !fullMergeOk {
+			return fmt.Errorf("merge operator returned failure")
+		}
+		w.s.t = w.s.t.Upsert(&Item{k: kb, v: mergedVal}, rand.Int())
+	}
+
+	for _, op := range emulatedBatch.Ops {
+		if op.V != nil {
+			w.s.t = w.s.t.Upsert(&Item{k: op.K, v: op.V}, rand.Int())
+		} else {
+			w.s.t = w.s.t.Delete(&Item{k: op.K})
+		}
+	}
+	w.s.m.Unlock()
+
+	return nil
+}
+
+func (w *Writer) Close() error {
+	w.s = nil
+	return nil
+}

vendor/github.com/blevesearch/bleve/index/store/kvstore.go

@@ -0,0 +1,174 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package store
+
+import "encoding/json"
+
+// KVStore is an abstraction for working with KV stores.  Note that
+// in order to be used with the bleve.registry, it must also implement
+// a constructor function of the registry.KVStoreConstructor type.
+type KVStore interface {
+
+	// Writer returns a KVWriter which can be used to
+	// make changes to the KVStore.  If a writer cannot
+	// be obtained a non-nil error is returned.
+	Writer() (KVWriter, error)
+
+	// Reader returns a KVReader which can be used to
+	// read data from the KVStore.  If a reader cannot
+	// be obtained a non-nil error is returned.
+	Reader() (KVReader, error)
+
+	// Close closes the KVStore
+	Close() error
+}
+
+// KVReader is an abstraction of an **ISOLATED** reader
+// In this context isolated is defined to mean that
+// writes/deletes made after the KVReader is opened
+// are not observed.
+// Because there is usually a cost associated with
+// keeping isolated readers active, users should
+// close them as soon as they are no longer needed.
+type KVReader interface {
+
+	// Get returns the value associated with the key
+	// If the key does not exist, nil is returned.
+	// The caller owns the bytes returned.
+	Get(key []byte) ([]byte, error)
+
+	// MultiGet retrieves multiple values in one call.
+	MultiGet(keys [][]byte) ([][]byte, error)
+
+	// PrefixIterator returns a KVIterator that will
+	// visit all K/V pairs with the provided prefix
+	PrefixIterator(prefix []byte) KVIterator
+
+	// RangeIterator returns a KVIterator that will
+	// visit all K/V pairs >= start AND < end
+	RangeIterator(start, end []byte) KVIterator
+
+	// Close closes the iterator
+	Close() error
+}
+
+// KVIterator is an abstraction around key iteration
+type KVIterator interface {
+
+	// Seek will advance the iterator to the specified key
+	Seek(key []byte)
+
+	// Next will advance the iterator to the next key
+	Next()
+
+	// Key returns the key pointed to by the iterator
+	// The bytes returned are **ONLY** valid until the next call to Seek/Next/Close
+	// Continued use after that requires that they be copied.
+	Key() []byte
+
+	// Value returns the value pointed to by the iterator
+	// The bytes returned are **ONLY** valid until the next call to Seek/Next/Close
+	// Continued use after that requires that they be copied.
+	Value() []byte
+
+	// Valid returns whether or not the iterator is in a valid state
+	Valid() bool
+
+	// Current returns Key(),Value(),Valid() in a single operation
+	Current() ([]byte, []byte, bool)
+
+	// Close closes the iterator
+	Close() error
+}
+
+// KVWriter is an abstraction for mutating the KVStore
+// KVWriter does **NOT** enforce restrictions of a single writer
+// if the underlying KVStore allows concurrent writes, the
+// KVWriter interface should also do so, it is up to the caller
+// to do this in a way that is safe and makes sense
+type KVWriter interface {
+
+	// NewBatch returns a KVBatch for performing batch operations on this kvstore
+	NewBatch() KVBatch
+
+	// NewBatchEx returns a KVBatch and an associated byte array
+	// that's pre-sized based on the KVBatchOptions.  The caller can
+	// use the returned byte array for keys and values associated with
+	// the batch.  Once the batch is either executed or closed, the
+	// associated byte array should no longer be accessed by the
+	// caller.
+	NewBatchEx(KVBatchOptions) ([]byte, KVBatch, error)
+
+	// ExecuteBatch will execute the KVBatch, the provided KVBatch **MUST** have
+	// been created by the same KVStore (though not necessarily the same KVWriter)
+	// Batch execution is atomic, either all the operations or none will be performed
+	ExecuteBatch(batch KVBatch) error
+
+	// Close closes the writer
+	Close() error
+}
+
+// KVBatchOptions provides the KVWriter.NewBatchEx() method with batch
+// preparation and preallocation information.
+type KVBatchOptions struct {
+	// TotalBytes is the sum of key and value bytes needed by the
+	// caller for the entire batch.  It affects the size of the
+	// returned byte array of KVWrite.NewBatchEx().
+	TotalBytes int
+
+	// NumSets is the number of Set() calls the caller will invoke on
+	// the KVBatch.
+	NumSets int
+
+	// NumDeletes is the number of Delete() calls the caller will invoke
+	// on the KVBatch.
+	NumDeletes int
+
+	// NumMerges is the number of Merge() calls the caller will invoke
+	// on the KVBatch.
+	NumMerges int
+}
+
+// KVBatch is an abstraction for making multiple KV mutations at once
+type KVBatch interface {
+
+	// Set updates the key with the specified value
+	// both key and value []byte may be reused as soon as this call returns
+	Set(key, val []byte)
+
+	// Delete removes the specified key
+	// the key []byte may be reused as soon as this call returns
+	Delete(key []byte)
+
+	// Merge merges old value with the new value at the specified key
+	// as prescribed by the KVStores merge operator
+	// both key and value []byte may be reused as soon as this call returns
+	Merge(key, val []byte)
+
+	// Reset frees resources for this batch and allows reuse
+	Reset()
+
+	// Close frees resources
+	Close() error
+}
+
+// KVStoreStats is an optional interface that KVStores can implement
+// if they're able to report any useful stats
+type KVStoreStats interface {
+	// Stats returns a JSON serializable object representing stats for this KVStore
+	Stats() json.Marshaler
+
+	StatsMap() map[string]interface{}
+}

vendor/github.com/blevesearch/bleve/index/store/merge.go

@@ -0,0 +1,64 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package store
+
+// At the moment this happens to be the same interface as described by
+// RocksDB, but this may not always be the case.
+
+type MergeOperator interface {
+
+	// FullMerge the full sequence of operands on top of the existingValue
+	// if no value currently exists, existingValue is nil
+	// return the merged value, and success/failure
+	FullMerge(key, existingValue []byte, operands [][]byte) ([]byte, bool)
+
+	// Partially merge these two operands.
+	// If partial merge cannot be done, return nil,false, which will defer
+	// all processing until the FullMerge is done.
+	PartialMerge(key, leftOperand, rightOperand []byte) ([]byte, bool)
+
+	// Name returns an identifier for the operator
+	Name() string
+}
+
+type EmulatedMerge struct {
+	Merges map[string][][]byte
+	mo     MergeOperator
+}
+
+func NewEmulatedMerge(mo MergeOperator) *EmulatedMerge {
+	return &EmulatedMerge{
+		Merges: make(map[string][][]byte),
+		mo:     mo,
+	}
+}
+
+func (m *EmulatedMerge) Merge(key, val []byte) {
+	ops, ok := m.Merges[string(key)]
+	if ok && len(ops) > 0 {
+		last := ops[len(ops)-1]
+		mergedVal, partialMergeOk := m.mo.PartialMerge(key, last, val)
+		if partialMergeOk {
+			// replace last entry with the result of the merge
+			ops[len(ops)-1] = mergedVal
+		} else {
+			// could not partial merge, append this to the end
+			ops = append(ops, val)
+		}
+	} else {
+		ops = [][]byte{val}
+	}
+	m.Merges[string(key)] = ops
+}

vendor/github.com/blevesearch/bleve/index/store/multiget.go

@@ -0,0 +1,33 @@
+//  Copyright (c) 2016 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package store
+
+// MultiGet is a helper function to retrieve mutiple keys from a
+// KVReader, and might be used by KVStore implementations that don't
+// have a native multi-get facility.
+func MultiGet(kvreader KVReader, keys [][]byte) ([][]byte, error) {
+	vals := make([][]byte, 0, len(keys))
+
+	for i, key := range keys {
+		val, err := kvreader.Get(key)
+		if err != nil {
+			return nil, err
+		}
+
+		vals[i] = val
+	}
+
+	return vals, nil
+}

vendor/github.com/blevesearch/bleve/index/upsidedown/analysis.go

@@ -0,0 +1,110 @@
+//  Copyright (c) 2015 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package upsidedown
+
+import (
+	"github.com/blevesearch/bleve/analysis"
+	"github.com/blevesearch/bleve/document"
+	"github.com/blevesearch/bleve/index"
+)
+
+func (udc *UpsideDownCouch) Analyze(d *document.Document) *index.AnalysisResult {
+	rv := &index.AnalysisResult{
+		DocID: d.ID,
+		Rows:  make([]index.IndexRow, 0, 100),
+	}
+
+	docIDBytes := []byte(d.ID)
+
+	// track our back index entries
+	backIndexStoredEntries := make([]*BackIndexStoreEntry, 0)
+
+	// information we collate as we merge fields with same name
+	fieldTermFreqs := make(map[uint16]analysis.TokenFrequencies)
+	fieldLengths := make(map[uint16]int)
+	fieldIncludeTermVectors := make(map[uint16]bool)
+	fieldNames := make(map[uint16]string)
+
+	analyzeField := func(field document.Field, storable bool) {
+		fieldIndex, newFieldRow := udc.fieldIndexOrNewRow(field.Name())
+		if newFieldRow != nil {
+			rv.Rows = append(rv.Rows, newFieldRow)
+		}
+		fieldNames[fieldIndex] = field.Name()
+
+		if field.Options().IsIndexed() {
+			fieldLength, tokenFreqs := field.Analyze()
+			existingFreqs := fieldTermFreqs[fieldIndex]
+			if existingFreqs == nil {
+				fieldTermFreqs[fieldIndex] = tokenFreqs
+			} else {
+				existingFreqs.MergeAll(field.Name(), tokenFreqs)
+				fieldTermFreqs[fieldIndex] = existingFreqs
+			}
+			fieldLengths[fieldIndex] += fieldLength
+			fieldIncludeTermVectors[fieldIndex] = field.Options().IncludeTermVectors()
+		}
+
+		if storable && field.Options().IsStored() {
+			rv.Rows, backIndexStoredEntries = udc.storeField(docIDBytes, field, fieldIndex, rv.Rows, backIndexStoredEntries)
+		}
+	}
+
+	// walk all the fields, record stored fields now
+	// place information about indexed fields into map
+	// this collates information across fields with
+	// same names (arrays)
+	for _, field := range d.Fields {
+		analyzeField(field, true)
+	}
+
+	if len(d.CompositeFields) > 0 {
+		for fieldIndex, tokenFreqs := range fieldTermFreqs {
+			// see if any of the composite fields need this
+			for _, compositeField := range d.CompositeFields {
+				compositeField.Compose(fieldNames[fieldIndex], fieldLengths[fieldIndex], tokenFreqs)
+			}
+		}
+
+		for _, compositeField := range d.CompositeFields {
+			analyzeField(compositeField, false)
+		}
+	}
+
+	rowsCapNeeded := len(rv.Rows) + 1
+	for _, tokenFreqs := range fieldTermFreqs {
+		rowsCapNeeded += len(tokenFreqs)
+	}
+
+	rv.Rows = append(make([]index.IndexRow, 0, rowsCapNeeded), rv.Rows...)
+
+	backIndexTermEntries := make([]*BackIndexTermEntry, 0, rowsCapNeeded)
+
+	// walk through the collated information and process
+	// once for each indexed field (unique name)
+	for fieldIndex, tokenFreqs := range fieldTermFreqs {
+		fieldLength := fieldLengths[fieldIndex]
+		includeTermVectors := fieldIncludeTermVectors[fieldIndex]
+
+		// encode this field
+		rv.Rows, backIndexTermEntries = udc.indexField(docIDBytes, includeTermVectors, fieldIndex, fieldLength, tokenFreqs, rv.Rows, backIndexTermEntries)
+	}
+
+	// build the back index row
+	backIndexRow := NewBackIndexRow(docIDBytes, backIndexTermEntries, backIndexStoredEntries)
+	rv.Rows = append(rv.Rows, backIndexRow)
+
+	return rv
+}

vendor/github.com/blevesearch/bleve/index/upsidedown/benchmark_all.sh

@@ -0,0 +1,8 @@
+#!/bin/sh
+
+BENCHMARKS=`grep "func Benchmark" *_test.go  | sed 's/.*func //' | sed s/\(.*{//`
+
+for BENCHMARK in $BENCHMARKS
+do
+	go test -v -run=xxx -bench=^$BENCHMARK$ -benchtime=10s -tags 'forestdb leveldb'  | grep -v ok | grep -v PASS
+done

vendor/github.com/blevesearch/bleve/index/upsidedown/dump.go

@@ -0,0 +1,172 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package upsidedown
+
+import (
+	"bytes"
+	"sort"
+
+	"github.com/blevesearch/bleve/index/store"
+)
+
+// the functions in this file are only intended to be used by
+// the bleve_dump utility and the debug http handlers
+// if your application relies on them, you're doing something wrong
+// they may change or be removed at any time
+
+func dumpPrefix(kvreader store.KVReader, rv chan interface{}, prefix []byte) {
+	start := prefix
+	if start == nil {
+		start = []byte{0}
+	}
+	it := kvreader.PrefixIterator(start)
+	defer func() {
+		cerr := it.Close()
+		if cerr != nil {
+			rv <- cerr
+		}
+	}()
+	key, val, valid := it.Current()
+	for valid {
+		ck := make([]byte, len(key))
+		copy(ck, key)
+		cv := make([]byte, len(val))
+		copy(cv, val)
+		row, err := ParseFromKeyValue(ck, cv)
+		if err != nil {
+			rv <- err
+			return
+		}
+		rv <- row
+
+		it.Next()
+		key, val, valid = it.Current()
+	}
+}
+
+func dumpRange(kvreader store.KVReader, rv chan interface{}, start, end []byte) {
+	it := kvreader.RangeIterator(start, end)
+	defer func() {
+		cerr := it.Close()
+		if cerr != nil {
+			rv <- cerr
+		}
+	}()
+	key, val, valid := it.Current()
+	for valid {
+		ck := make([]byte, len(key))
+		copy(ck, key)
+		cv := make([]byte, len(val))
+		copy(cv, val)
+		row, err := ParseFromKeyValue(ck, cv)
+		if err != nil {
+			rv <- err
+			return
+		}
+		rv <- row
+
+		it.Next()
+		key, val, valid = it.Current()
+	}
+}
+
+func (i *IndexReader) DumpAll() chan interface{} {
+	rv := make(chan interface{})
+	go func() {
+		defer close(rv)
+		dumpRange(i.kvreader, rv, nil, nil)
+	}()
+	return rv
+}
+
+func (i *IndexReader) DumpFields() chan interface{} {
+	rv := make(chan interface{})
+	go func() {
+		defer close(rv)
+		dumpPrefix(i.kvreader, rv, []byte{'f'})
+	}()
+	return rv
+}
+
+type keyset [][]byte
+
+func (k keyset) Len() int           { return len(k) }
+func (k keyset) Swap(i, j int)      { k[i], k[j] = k[j], k[i] }
+func (k keyset) Less(i, j int) bool { return bytes.Compare(k[i], k[j]) < 0 }
+
+// DumpDoc returns all rows in the index related to this doc id
+func (i *IndexReader) DumpDoc(id string) chan interface{} {
+	idBytes := []byte(id)
+
+	rv := make(chan interface{})
+
+	go func() {
+		defer close(rv)
+
+		back, err := backIndexRowForDoc(i.kvreader, []byte(id))
+		if err != nil {
+			rv <- err
+			return
+		}
+
+		// no such doc
+		if back == nil {
+			return
+		}
+		// build sorted list of term keys
+		keys := make(keyset, 0)
+		for _, entry := range back.termEntries {
+			tfr := NewTermFrequencyRow([]byte(*entry.Term), uint16(*entry.Field), idBytes, 0, 0)
+			key := tfr.Key()
+			keys = append(keys, key)
+		}
+		sort.Sort(keys)
+
+		// first add all the stored rows
+		storedRowPrefix := NewStoredRow(idBytes, 0, []uint64{}, 'x', []byte{}).ScanPrefixForDoc()
+		dumpPrefix(i.kvreader, rv, storedRowPrefix)
+
+		// now walk term keys in order and add them as well
+		if len(keys) > 0 {
+			it := i.kvreader.RangeIterator(keys[0], nil)
+			defer func() {
+				cerr := it.Close()
+				if cerr != nil {
+					rv <- cerr
+				}
+			}()
+
+			for _, key := range keys {
+				it.Seek(key)
+				rkey, rval, valid := it.Current()
+				if !valid {
+					break
+				}
+				rck := make([]byte, len(rkey))
+				copy(rck, key)
+				rcv := make([]byte, len(rval))
+				copy(rcv, rval)
+				row, err := ParseFromKeyValue(rck, rcv)
+				if err != nil {
+					rv <- err
+					return
+				}
+				rv <- row
+			}
+		}
+	}()
+
+	return rv
+}

vendor/github.com/blevesearch/bleve/index/upsidedown/field_dict.go

@@ -0,0 +1,78 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package upsidedown
+
+import (
+	"fmt"
+
+	"github.com/blevesearch/bleve/index"
+	"github.com/blevesearch/bleve/index/store"
+)
+
+type UpsideDownCouchFieldDict struct {
+	indexReader *IndexReader
+	iterator    store.KVIterator
+	dictRow     *DictionaryRow
+	dictEntry   *index.DictEntry
+	field       uint16
+}
+
+func newUpsideDownCouchFieldDict(indexReader *IndexReader, field uint16, startTerm, endTerm []byte) (*UpsideDownCouchFieldDict, error) {
+
+	startKey := NewDictionaryRow(startTerm, field, 0).Key()
+	if endTerm == nil {
+		endTerm = []byte{ByteSeparator}
+	} else {
+		endTerm = incrementBytes(endTerm)
+	}
+	endKey := NewDictionaryRow(endTerm, field, 0).Key()
+
+	it := indexReader.kvreader.RangeIterator(startKey, endKey)
+
+	return &UpsideDownCouchFieldDict{
+		indexReader: indexReader,
+		iterator:    it,
+		dictRow:     &DictionaryRow{},   // Pre-alloced, reused row.
+		dictEntry:   &index.DictEntry{}, // Pre-alloced, reused entry.
+		field:       field,
+	}, nil
+
+}
+
+func (r *UpsideDownCouchFieldDict) Next() (*index.DictEntry, error) {
+	key, val, valid := r.iterator.Current()
+	if !valid {
+		return nil, nil
+	}
+
+	err := r.dictRow.parseDictionaryK(key)
+	if err != nil {
+		return nil, fmt.Errorf("unexpected error parsing dictionary row key: %v", err)
+	}
+	err = r.dictRow.parseDictionaryV(val)
+	if err != nil {
+		return nil, fmt.Errorf("unexpected error parsing dictionary row val: %v", err)
+	}
+	r.dictEntry.Term = string(r.dictRow.term)
+	r.dictEntry.Count = r.dictRow.count
+	// advance the iterator to the next term
+	r.iterator.Next()
+	return r.dictEntry, nil
+
+}
+
+func (r *UpsideDownCouchFieldDict) Close() error {
+	return r.iterator.Close()
+}

vendor/github.com/blevesearch/bleve/index/upsidedown/index_reader.go

@@ -0,0 +1,189 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package upsidedown
+
+import (
+	"github.com/blevesearch/bleve/document"
+	"github.com/blevesearch/bleve/index"
+	"github.com/blevesearch/bleve/index/store"
+)
+
+type IndexReader struct {
+	index    *UpsideDownCouch
+	kvreader store.KVReader
+	docCount uint64
+}
+
+func (i *IndexReader) TermFieldReader(term []byte, fieldName string, includeFreq, includeNorm, includeTermVectors bool) (index.TermFieldReader, error) {
+	fieldIndex, fieldExists := i.index.fieldCache.FieldNamed(fieldName, false)
+	if fieldExists {
+		return newUpsideDownCouchTermFieldReader(i, term, uint16(fieldIndex), includeFreq, includeNorm, includeTermVectors)
+	}
+	return newUpsideDownCouchTermFieldReader(i, []byte{ByteSeparator}, ^uint16(0), includeFreq, includeNorm, includeTermVectors)
+}
+
+func (i *IndexReader) FieldDict(fieldName string) (index.FieldDict, error) {
+	return i.FieldDictRange(fieldName, nil, nil)
+}
+
+func (i *IndexReader) FieldDictRange(fieldName string, startTerm []byte, endTerm []byte) (index.FieldDict, error) {
+	fieldIndex, fieldExists := i.index.fieldCache.FieldNamed(fieldName, false)
+	if fieldExists {
+		return newUpsideDownCouchFieldDict(i, uint16(fieldIndex), startTerm, endTerm)
+	}
+	return newUpsideDownCouchFieldDict(i, ^uint16(0), []byte{ByteSeparator}, []byte{})
+}
+
+func (i *IndexReader) FieldDictPrefix(fieldName string, termPrefix []byte) (index.FieldDict, error) {
+	return i.FieldDictRange(fieldName, termPrefix, termPrefix)
+}
+
+func (i *IndexReader) DocIDReaderAll() (index.DocIDReader, error) {
+	return newUpsideDownCouchDocIDReader(i)
+}
+
+func (i *IndexReader) DocIDReaderOnly(ids []string) (index.DocIDReader, error) {
+	return newUpsideDownCouchDocIDReaderOnly(i, ids)
+}
+
+func (i *IndexReader) Document(id string) (doc *document.Document, err error) {
+	// first hit the back index to confirm doc exists
+	var backIndexRow *BackIndexRow
+	backIndexRow, err = backIndexRowForDoc(i.kvreader, []byte(id))
+	if err != nil {
+		return
+	}
+	if backIndexRow == nil {
+		return
+	}
+	doc = document.NewDocument(id)
+	storedRow := NewStoredRow([]byte(id), 0, []uint64{}, 'x', nil)
+	storedRowScanPrefix := storedRow.ScanPrefixForDoc()
+	it := i.kvreader.PrefixIterator(storedRowScanPrefix)
+	defer func() {
+		if cerr := it.Close(); err == nil && cerr != nil {
+			err = cerr
+		}
+	}()
+	key, val, valid := it.Current()
+	for valid {
+		safeVal := make([]byte, len(val))
+		copy(safeVal, val)
+		var row *StoredRow
+		row, err = NewStoredRowKV(key, safeVal)
+		if err != nil {
+			doc = nil
+			return
+		}
+		if row != nil {
+			fieldName := i.index.fieldCache.FieldIndexed(row.field)
+			field := decodeFieldType(row.typ, fieldName, row.arrayPositions, row.value)
+			if field != nil {
+				doc.AddField(field)
+			}
+		}
+
+		it.Next()
+		key, val, valid = it.Current()
+	}
+	return
+}
+
+func (i *IndexReader) DocumentFieldTerms(id index.IndexInternalID, fields []string) (index.FieldTerms, error) {
+	back, err := backIndexRowForDoc(i.kvreader, id)
+	if err != nil {
+		return nil, err
+	}
+	if back == nil {
+		return nil, nil
+	}
+	rv := make(index.FieldTerms, len(fields))
+	fieldsMap := make(map[uint16]string, len(fields))
+	for _, f := range fields {
+		id, ok := i.index.fieldCache.FieldNamed(f, false)
+		if ok {
+			fieldsMap[id] = f
+		}
+	}
+	for _, entry := range back.termEntries {
+		if field, ok := fieldsMap[uint16(*entry.Field)]; ok {
+			rv[field] = append(rv[field], *entry.Term)
+		}
+	}
+	return rv, nil
+}
+
+func (i *IndexReader) Fields() (fields []string, err error) {
+	fields = make([]string, 0)
+	it := i.kvreader.PrefixIterator([]byte{'f'})
+	defer func() {
+		if cerr := it.Close(); err == nil && cerr != nil {
+			err = cerr
+		}
+	}()
+	key, val, valid := it.Current()
+	for valid {
+		var row UpsideDownCouchRow
+		row, err = ParseFromKeyValue(key, val)
+		if err != nil {
+			fields = nil
+			return
+		}
+		if row != nil {
+			fieldRow, ok := row.(*FieldRow)
+			if ok {
+				fields = append(fields, fieldRow.name)
+			}
+		}
+
+		it.Next()
+		key, val, valid = it.Current()
+	}
+	return
+}
+
+func (i *IndexReader) GetInternal(key []byte) ([]byte, error) {
+	internalRow := NewInternalRow(key, nil)
+	return i.kvreader.Get(internalRow.Key())
+}
+
+func (i *IndexReader) DocCount() (uint64, error) {
+	return i.docCount, nil
+}
+
+func (i *IndexReader) Close() error {
+	return i.kvreader.Close()
+}
+
+func (i *IndexReader) ExternalID(id index.IndexInternalID) (string, error) {
+	return string(id), nil
+}
+
+func (i *IndexReader) InternalID(id string) (index.IndexInternalID, error) {
+	return index.IndexInternalID(id), nil
+}
+
+func incrementBytes(in []byte) []byte {
+	rv := make([]byte, len(in))
+	copy(rv, in)
+	for i := len(rv) - 1; i >= 0; i-- {
+		rv[i] = rv[i] + 1
+		if rv[i] != 0 {
+			// didn't overflow, so stop
+			break
+		}
+	}
+	return rv
+}

vendor/github.com/blevesearch/bleve/index/upsidedown/reader.go

@@ -0,0 +1,325 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package upsidedown
+
+import (
+	"bytes"
+	"sort"
+	"sync/atomic"
+
+	"github.com/blevesearch/bleve/index"
+	"github.com/blevesearch/bleve/index/store"
+)
+
+type UpsideDownCouchTermFieldReader struct {
+	count       uint64
+	indexReader *IndexReader
+	iterator    store.KVIterator
+	term        []byte
+	tfrNext     *TermFrequencyRow
+	keyBuf      []byte
+	field       uint16
+}
+
+func newUpsideDownCouchTermFieldReader(indexReader *IndexReader, term []byte, field uint16, includeFreq, includeNorm, includeTermVectors bool) (*UpsideDownCouchTermFieldReader, error) {
+	dictionaryRow := NewDictionaryRow(term, field, 0)
+	val, err := indexReader.kvreader.Get(dictionaryRow.Key())
+	if err != nil {
+		return nil, err
+	}
+	if val == nil {
+		atomic.AddUint64(&indexReader.index.stats.termSearchersStarted, uint64(1))
+		return &UpsideDownCouchTermFieldReader{
+			count:   0,
+			term:    term,
+			tfrNext: &TermFrequencyRow{},
+			field:   field,
+		}, nil
+	}
+
+	err = dictionaryRow.parseDictionaryV(val)
+	if err != nil {
+		return nil, err
+	}
+
+	tfr := NewTermFrequencyRow(term, field, []byte{}, 0, 0)
+	it := indexReader.kvreader.PrefixIterator(tfr.Key())
+
+	atomic.AddUint64(&indexReader.index.stats.termSearchersStarted, uint64(1))
+	return &UpsideDownCouchTermFieldReader{
+		indexReader: indexReader,
+		iterator:    it,
+		count:       dictionaryRow.count,
+		term:        term,
+		field:       field,
+	}, nil
+}
+
+func (r *UpsideDownCouchTermFieldReader) Count() uint64 {
+	return r.count
+}
+
+func (r *UpsideDownCouchTermFieldReader) Next(preAlloced *index.TermFieldDoc) (*index.TermFieldDoc, error) {
+	if r.iterator != nil {
+		// We treat tfrNext also like an initialization flag, which
+		// tells us whether we need to invoke the underlying
+		// iterator.Next().  The first time, don't call iterator.Next().
+		if r.tfrNext != nil {
+			r.iterator.Next()
+		} else {
+			r.tfrNext = &TermFrequencyRow{}
+		}
+		key, val, valid := r.iterator.Current()
+		if valid {
+			tfr := r.tfrNext
+			err := tfr.parseKDoc(key, r.term)
+			if err != nil {
+				return nil, err
+			}
+			err = tfr.parseV(val)
+			if err != nil {
+				return nil, err
+			}
+			rv := preAlloced
+			if rv == nil {
+				rv = &index.TermFieldDoc{}
+			}
+			rv.ID = append(rv.ID, tfr.doc...)
+			rv.Freq = tfr.freq
+			rv.Norm = float64(tfr.norm)
+			if tfr.vectors != nil {
+				rv.Vectors = r.indexReader.index.termFieldVectorsFromTermVectors(tfr.vectors)
+			}
+			return rv, nil
+		}
+	}
+	return nil, nil
+}
+
+func (r *UpsideDownCouchTermFieldReader) Advance(docID index.IndexInternalID, preAlloced *index.TermFieldDoc) (rv *index.TermFieldDoc, err error) {
+	if r.iterator != nil {
+		if r.tfrNext == nil {
+			r.tfrNext = &TermFrequencyRow{}
+		}
+		tfr := InitTermFrequencyRow(r.tfrNext, r.term, r.field, docID, 0, 0)
+		r.keyBuf, err = tfr.KeyAppendTo(r.keyBuf[:0])
+		if err != nil {
+			return nil, err
+		}
+		r.iterator.Seek(r.keyBuf)
+		key, val, valid := r.iterator.Current()
+		if valid {
+			err := tfr.parseKDoc(key, r.term)
+			if err != nil {
+				return nil, err
+			}
+			err = tfr.parseV(val)
+			if err != nil {
+				return nil, err
+			}
+			rv = preAlloced
+			if rv == nil {
+				rv = &index.TermFieldDoc{}
+			}
+			rv.ID = append(rv.ID, tfr.doc...)
+			rv.Freq = tfr.freq
+			rv.Norm = float64(tfr.norm)
+			if tfr.vectors != nil {
+				rv.Vectors = r.indexReader.index.termFieldVectorsFromTermVectors(tfr.vectors)
+			}
+			return rv, nil
+		}
+	}
+	return nil, nil
+}
+
+func (r *UpsideDownCouchTermFieldReader) Close() error {
+	if r.indexReader != nil {
+		atomic.AddUint64(&r.indexReader.index.stats.termSearchersFinished, uint64(1))
+	}
+	if r.iterator != nil {
+		return r.iterator.Close()
+	}
+	return nil
+}
+
+type UpsideDownCouchDocIDReader struct {
+	indexReader *IndexReader
+	iterator    store.KVIterator
+	only        []string
+	onlyPos     int
+	onlyMode    bool
+}
+
+func newUpsideDownCouchDocIDReader(indexReader *IndexReader) (*UpsideDownCouchDocIDReader, error) {
+
+	startBytes := []byte{0x0}
+	endBytes := []byte{0xff}
+
+	bisr := NewBackIndexRow(startBytes, nil, nil)
+	bier := NewBackIndexRow(endBytes, nil, nil)
+	it := indexReader.kvreader.RangeIterator(bisr.Key(), bier.Key())
+
+	return &UpsideDownCouchDocIDReader{
+		indexReader: indexReader,
+		iterator:    it,
+	}, nil
+}
+
+func newUpsideDownCouchDocIDReaderOnly(indexReader *IndexReader, ids []string) (*UpsideDownCouchDocIDReader, error) {
+	// ensure ids are sorted
+	sort.Strings(ids)
+	startBytes := []byte{0x0}
+	if len(ids) > 0 {
+		startBytes = []byte(ids[0])
+	}
+	endBytes := []byte{0xff}
+	if len(ids) > 0 {
+		endBytes = incrementBytes([]byte(ids[len(ids)-1]))
+	}
+	bisr := NewBackIndexRow(startBytes, nil, nil)
+	bier := NewBackIndexRow(endBytes, nil, nil)
+	it := indexReader.kvreader.RangeIterator(bisr.Key(), bier.Key())
+
+	return &UpsideDownCouchDocIDReader{
+		indexReader: indexReader,
+		iterator:    it,
+		only:        ids,
+		onlyMode:    true,
+	}, nil
+}
+
+func (r *UpsideDownCouchDocIDReader) Next() (index.IndexInternalID, error) {
+	key, val, valid := r.iterator.Current()
+
+	if r.onlyMode {
+		var rv index.IndexInternalID
+		for valid && r.onlyPos < len(r.only) {
+			br, err := NewBackIndexRowKV(key, val)
+			if err != nil {
+				return nil, err
+			}
+			if !bytes.Equal(br.doc, []byte(r.only[r.onlyPos])) {
+				ok := r.nextOnly()
+				if !ok {
+					return nil, nil
+				}
+				r.iterator.Seek(NewBackIndexRow([]byte(r.only[r.onlyPos]), nil, nil).Key())
+				key, val, valid = r.iterator.Current()
+				continue
+			} else {
+				rv = append([]byte(nil), br.doc...)
+				break
+			}
+		}
+		if valid && r.onlyPos < len(r.only) {
+			ok := r.nextOnly()
+			if ok {
+				r.iterator.Seek(NewBackIndexRow([]byte(r.only[r.onlyPos]), nil, nil).Key())
+			}
+			return rv, nil
+		}
+
+	} else {
+		if valid {
+			br, err := NewBackIndexRowKV(key, val)
+			if err != nil {
+				return nil, err
+			}
+			rv := append([]byte(nil), br.doc...)
+			r.iterator.Next()
+			return rv, nil
+		}
+	}
+	return nil, nil
+}
+
+func (r *UpsideDownCouchDocIDReader) Advance(docID index.IndexInternalID) (index.IndexInternalID, error) {
+
+	if r.onlyMode {
+		r.onlyPos = sort.SearchStrings(r.only, string(docID))
+		if r.onlyPos >= len(r.only) {
+			// advanced to key after our last only key
+			return nil, nil
+		}
+		r.iterator.Seek(NewBackIndexRow([]byte(r.only[r.onlyPos]), nil, nil).Key())
+		key, val, valid := r.iterator.Current()
+
+		var rv index.IndexInternalID
+		for valid && r.onlyPos < len(r.only) {
+			br, err := NewBackIndexRowKV(key, val)
+			if err != nil {
+				return nil, err
+			}
+			if !bytes.Equal(br.doc, []byte(r.only[r.onlyPos])) {
+				// the only key we seek'd to didn't exist
+				// now look for the closest key that did exist in only
+				r.onlyPos = sort.SearchStrings(r.only, string(br.doc))
+				if r.onlyPos >= len(r.only) {
+					// advanced to key after our last only key
+					return nil, nil
+				}
+				// now seek to this new only key
+				r.iterator.Seek(NewBackIndexRow([]byte(r.only[r.onlyPos]), nil, nil).Key())
+				key, val, valid = r.iterator.Current()
+				continue
+			} else {
+				rv = append([]byte(nil), br.doc...)
+				break
+			}
+		}
+		if valid && r.onlyPos < len(r.only) {
+			ok := r.nextOnly()
+			if ok {
+				r.iterator.Seek(NewBackIndexRow([]byte(r.only[r.onlyPos]), nil, nil).Key())
+			}
+			return rv, nil
+		}
+	} else {
+		bir := NewBackIndexRow(docID, nil, nil)
+		r.iterator.Seek(bir.Key())
+		key, val, valid := r.iterator.Current()
+		if valid {
+			br, err := NewBackIndexRowKV(key, val)
+			if err != nil {
+				return nil, err
+			}
+			rv := append([]byte(nil), br.doc...)
+			r.iterator.Next()
+			return rv, nil
+		}
+	}
+	return nil, nil
+}
+
+func (r *UpsideDownCouchDocIDReader) Close() error {
+	return r.iterator.Close()
+}
+
+// move the r.only pos forward one, skipping duplicates
+// return true if there is more data, or false if we got to the end of the list
+func (r *UpsideDownCouchDocIDReader) nextOnly() bool {
+
+	// advance 1 position, until we see a different key
+	//   it's already sorted, so this skips duplicates
+	start := r.onlyPos
+	r.onlyPos++
+	for r.onlyPos < len(r.only) && r.only[r.onlyPos] == r.only[start] {
+		start = r.onlyPos
+		r.onlyPos++
+	}
+	// inidicate if we got to the end of the list
+	return r.onlyPos < len(r.only)
+}

vendor/github.com/blevesearch/bleve/index/upsidedown/row.go

@@ -0,0 +1,853 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package upsidedown
+
+import (
+	"bytes"
+	"encoding/binary"
+	"fmt"
+	"io"
+	"math"
+
+	"github.com/golang/protobuf/proto"
+)
+
+const ByteSeparator byte = 0xff
+
+type UpsideDownCouchRowStream chan UpsideDownCouchRow
+
+type UpsideDownCouchRow interface {
+	KeySize() int
+	KeyTo([]byte) (int, error)
+	Key() []byte
+	Value() []byte
+	ValueSize() int
+	ValueTo([]byte) (int, error)
+}
+
+func ParseFromKeyValue(key, value []byte) (UpsideDownCouchRow, error) {
+	if len(key) > 0 {
+		switch key[0] {
+		case 'v':
+			return NewVersionRowKV(key, value)
+		case 'f':
+			return NewFieldRowKV(key, value)
+		case 'd':
+			return NewDictionaryRowKV(key, value)
+		case 't':
+			return NewTermFrequencyRowKV(key, value)
+		case 'b':
+			return NewBackIndexRowKV(key, value)
+		case 's':
+			return NewStoredRowKV(key, value)
+		case 'i':
+			return NewInternalRowKV(key, value)
+		}
+		return nil, fmt.Errorf("Unknown field type '%s'", string(key[0]))
+	}
+	return nil, fmt.Errorf("Invalid empty key")
+}
+
+// VERSION
+
+type VersionRow struct {
+	version uint8
+}
+
+func (v *VersionRow) Key() []byte {
+	return []byte{'v'}
+}
+
+func (v *VersionRow) KeySize() int {
+	return 1
+}
+
+func (v *VersionRow) KeyTo(buf []byte) (int, error) {
+	buf[0] = 'v'
+	return 1, nil
+}
+
+func (v *VersionRow) Value() []byte {
+	return []byte{byte(v.version)}
+}
+
+func (v *VersionRow) ValueSize() int {
+	return 1
+}
+
+func (v *VersionRow) ValueTo(buf []byte) (int, error) {
+	buf[0] = v.version
+	return 1, nil
+}
+
+func (v *VersionRow) String() string {
+	return fmt.Sprintf("Version: %d", v.version)
+}
+
+func NewVersionRow(version uint8) *VersionRow {
+	return &VersionRow{
+		version: version,
+	}
+}
+
+func NewVersionRowKV(key, value []byte) (*VersionRow, error) {
+	rv := VersionRow{}
+	buf := bytes.NewBuffer(value)
+	err := binary.Read(buf, binary.LittleEndian, &rv.version)
+	if err != nil {
+		return nil, err
+	}
+	return &rv, nil
+}
+
+// INTERNAL STORAGE
+
+type InternalRow struct {
+	key []byte
+	val []byte
+}
+
+func (i *InternalRow) Key() []byte {
+	buf := make([]byte, i.KeySize())
+	size, _ := i.KeyTo(buf)
+	return buf[:size]
+}
+
+func (i *InternalRow) KeySize() int {
+	return len(i.key) + 1
+}
+
+func (i *InternalRow) KeyTo(buf []byte) (int, error) {
+	buf[0] = 'i'
+	actual := copy(buf[1:], i.key)
+	return 1 + actual, nil
+}
+
+func (i *InternalRow) Value() []byte {
+	return i.val
+}
+
+func (i *InternalRow) ValueSize() int {
+	return len(i.val)
+}
+
+func (i *InternalRow) ValueTo(buf []byte) (int, error) {
+	actual := copy(buf, i.val)
+	return actual, nil
+}
+
+func (i *InternalRow) String() string {
+	return fmt.Sprintf("InternalStore - Key: %s (% x) Val: %s (% x)", i.key, i.key, i.val, i.val)
+}
+
+func NewInternalRow(key, val []byte) *InternalRow {
+	return &InternalRow{
+		key: key,
+		val: val,
+	}
+}
+
+func NewInternalRowKV(key, value []byte) (*InternalRow, error) {
+	rv := InternalRow{}
+	rv.key = key[1:]
+	rv.val = value
+	return &rv, nil
+}
+
+// FIELD definition
+
+type FieldRow struct {
+	index uint16
+	name  string
+}
+
+func (f *FieldRow) Key() []byte {
+	buf := make([]byte, f.KeySize())
+	size, _ := f.KeyTo(buf)
+	return buf[:size]
+}
+
+func (f *FieldRow) KeySize() int {
+	return 3
+}
+
+func (f *FieldRow) KeyTo(buf []byte) (int, error) {
+	buf[0] = 'f'
+	binary.LittleEndian.PutUint16(buf[1:3], f.index)
+	return 3, nil
+}
+
+func (f *FieldRow) Value() []byte {
+	return append([]byte(f.name), ByteSeparator)
+}
+
+func (f *FieldRow) ValueSize() int {
+	return len(f.name) + 1
+}
+
+func (f *FieldRow) ValueTo(buf []byte) (int, error) {
+	size := copy(buf, f.name)
+	buf[size] = ByteSeparator
+	return size + 1, nil
+}
+
+func (f *FieldRow) String() string {
+	return fmt.Sprintf("Field: %d Name: %s", f.index, f.name)
+}
+
+func NewFieldRow(index uint16, name string) *FieldRow {
+	return &FieldRow{
+		index: index,
+		name:  name,
+	}
+}
+
+func NewFieldRowKV(key, value []byte) (*FieldRow, error) {
+	rv := FieldRow{}
+
+	buf := bytes.NewBuffer(key)
+	_, err := buf.ReadByte() // type
+	if err != nil {
+		return nil, err
+	}
+	err = binary.Read(buf, binary.LittleEndian, &rv.index)
+	if err != nil {
+		return nil, err
+	}
+
+	buf = bytes.NewBuffer(value)
+	rv.name, err = buf.ReadString(ByteSeparator)
+	if err != nil {
+		return nil, err
+	}
+	rv.name = rv.name[:len(rv.name)-1] // trim off separator byte
+
+	return &rv, nil
+}
+
+// DICTIONARY
+
+const DictionaryRowMaxValueSize = binary.MaxVarintLen64
+
+type DictionaryRow struct {
+	term  []byte
+	count uint64
+	field uint16
+}
+
+func (dr *DictionaryRow) Key() []byte {
+	buf := make([]byte, dr.KeySize())
+	size, _ := dr.KeyTo(buf)
+	return buf[:size]
+}
+
+func (dr *DictionaryRow) KeySize() int {
+	return len(dr.term) + 3
+}
+
+func (dr *DictionaryRow) KeyTo(buf []byte) (int, error) {
+	buf[0] = 'd'
+	binary.LittleEndian.PutUint16(buf[1:3], dr.field)
+	size := copy(buf[3:], dr.term)
+	return size + 3, nil
+}
+
+func (dr *DictionaryRow) Value() []byte {
+	buf := make([]byte, dr.ValueSize())
+	size, _ := dr.ValueTo(buf)
+	return buf[:size]
+}
+
+func (dr *DictionaryRow) ValueSize() int {
+	return DictionaryRowMaxValueSize
+}
+
+func (dr *DictionaryRow) ValueTo(buf []byte) (int, error) {
+	used := binary.PutUvarint(buf, dr.count)
+	return used, nil
+}
+
+func (dr *DictionaryRow) String() string {
+	return fmt.Sprintf("Dictionary Term: `%s` Field: %d Count: %d ", string(dr.term), dr.field, dr.count)
+}
+
+func NewDictionaryRow(term []byte, field uint16, count uint64) *DictionaryRow {
+	return &DictionaryRow{
+		term:  term,
+		field: field,
+		count: count,
+	}
+}
+
+func NewDictionaryRowKV(key, value []byte) (*DictionaryRow, error) {
+	rv, err := NewDictionaryRowK(key)
+	if err != nil {
+		return nil, err
+	}
+
+	err = rv.parseDictionaryV(value)
+	if err != nil {
+		return nil, err
+	}
+	return rv, nil
+
+}
+
+func NewDictionaryRowK(key []byte) (*DictionaryRow, error) {
+	rv := &DictionaryRow{}
+	err := rv.parseDictionaryK(key)
+	if err != nil {
+		return nil, err
+	}
+	return rv, nil
+}
+
+func (dr *DictionaryRow) parseDictionaryK(key []byte) error {
+	dr.field = binary.LittleEndian.Uint16(key[1:3])
+	if dr.term != nil {
+		dr.term = dr.term[:0]
+	}
+	dr.term = append(dr.term, key[3:]...)
+	return nil
+}
+
+func (dr *DictionaryRow) parseDictionaryV(value []byte) error {
+	count, nread := binary.Uvarint(value)
+	if nread <= 0 {
+		return fmt.Errorf("DictionaryRow parse Uvarint error, nread: %d", nread)
+	}
+	dr.count = count
+	return nil
+}
+
+// TERM FIELD FREQUENCY
+
+type TermVector struct {
+	field          uint16
+	arrayPositions []uint64
+	pos            uint64
+	start          uint64
+	end            uint64
+}
+
+func (tv *TermVector) String() string {
+	return fmt.Sprintf("Field: %d Pos: %d Start: %d End %d ArrayPositions: %#v", tv.field, tv.pos, tv.start, tv.end, tv.arrayPositions)
+}
+
+type TermFrequencyRow struct {
+	term    []byte
+	doc     []byte
+	freq    uint64
+	vectors []*TermVector
+	norm    float32
+	field   uint16
+}
+
+func (tfr *TermFrequencyRow) Term() []byte {
+	return tfr.term
+}
+
+func (tfr *TermFrequencyRow) Freq() uint64 {
+	return tfr.freq
+}
+
+func (tfr *TermFrequencyRow) ScanPrefixForField() []byte {
+	buf := make([]byte, 3)
+	buf[0] = 't'
+	binary.LittleEndian.PutUint16(buf[1:3], tfr.field)
+	return buf
+}
+
+func (tfr *TermFrequencyRow) ScanPrefixForFieldTermPrefix() []byte {
+	buf := make([]byte, 3+len(tfr.term))
+	buf[0] = 't'
+	binary.LittleEndian.PutUint16(buf[1:3], tfr.field)
+	copy(buf[3:], tfr.term)
+	return buf
+}
+
+func (tfr *TermFrequencyRow) ScanPrefixForFieldTerm() []byte {
+	buf := make([]byte, 3+len(tfr.term)+1)
+	buf[0] = 't'
+	binary.LittleEndian.PutUint16(buf[1:3], tfr.field)
+	termLen := copy(buf[3:], tfr.term)
+	buf[3+termLen] = ByteSeparator
+	return buf
+}
+
+func (tfr *TermFrequencyRow) Key() []byte {
+	buf := make([]byte, tfr.KeySize())
+	size, _ := tfr.KeyTo(buf)
+	return buf[:size]
+}
+
+func (tfr *TermFrequencyRow) KeySize() int {
+	return 3 + len(tfr.term) + 1 + len(tfr.doc)
+}
+
+func (tfr *TermFrequencyRow) KeyTo(buf []byte) (int, error) {
+	buf[0] = 't'
+	binary.LittleEndian.PutUint16(buf[1:3], tfr.field)
+	termLen := copy(buf[3:], tfr.term)
+	buf[3+termLen] = ByteSeparator
+	docLen := copy(buf[3+termLen+1:], tfr.doc)
+	return 3 + termLen + 1 + docLen, nil
+}
+
+func (tfr *TermFrequencyRow) KeyAppendTo(buf []byte) ([]byte, error) {
+	keySize := tfr.KeySize()
+	if cap(buf) < keySize {
+		buf = make([]byte, keySize)
+	}
+	actualSize, err := tfr.KeyTo(buf[0:keySize])
+	return buf[0:actualSize], err
+}
+
+func (tfr *TermFrequencyRow) DictionaryRowKey() []byte {
+	dr := NewDictionaryRow(tfr.term, tfr.field, 0)
+	return dr.Key()
+}
+
+func (tfr *TermFrequencyRow) DictionaryRowKeySize() int {
+	dr := NewDictionaryRow(tfr.term, tfr.field, 0)
+	return dr.KeySize()
+}
+
+func (tfr *TermFrequencyRow) DictionaryRowKeyTo(buf []byte) (int, error) {
+	dr := NewDictionaryRow(tfr.term, tfr.field, 0)
+	return dr.KeyTo(buf)
+}
+
+func (tfr *TermFrequencyRow) Value() []byte {
+	buf := make([]byte, tfr.ValueSize())
+	size, _ := tfr.ValueTo(buf)
+	return buf[:size]
+}
+
+func (tfr *TermFrequencyRow) ValueSize() int {
+	bufLen := binary.MaxVarintLen64 + binary.MaxVarintLen64
+	for _, vector := range tfr.vectors {
+		bufLen += (binary.MaxVarintLen64 * 4) + (1+len(vector.arrayPositions))*binary.MaxVarintLen64
+	}
+	return bufLen
+}
+
+func (tfr *TermFrequencyRow) ValueTo(buf []byte) (int, error) {
+	used := binary.PutUvarint(buf[:binary.MaxVarintLen64], tfr.freq)
+
+	normuint32 := math.Float32bits(tfr.norm)
+	newbuf := buf[used : used+binary.MaxVarintLen64]
+	used += binary.PutUvarint(newbuf, uint64(normuint32))
+
+	for _, vector := range tfr.vectors {
+		used += binary.PutUvarint(buf[used:used+binary.MaxVarintLen64], uint64(vector.field))
+		used += binary.PutUvarint(buf[used:used+binary.MaxVarintLen64], vector.pos)
+		used += binary.PutUvarint(buf[used:used+binary.MaxVarintLen64], vector.start)
+		used += binary.PutUvarint(buf[used:used+binary.MaxVarintLen64], vector.end)
+		used += binary.PutUvarint(buf[used:used+binary.MaxVarintLen64], uint64(len(vector.arrayPositions)))
+		for _, arrayPosition := range vector.arrayPositions {
+			used += binary.PutUvarint(buf[used:used+binary.MaxVarintLen64], arrayPosition)
+		}
+	}
+	return used, nil
+}
+
+func (tfr *TermFrequencyRow) String() string {
+	return fmt.Sprintf("Term: `%s` Field: %d DocId: `%s` Frequency: %d Norm: %f Vectors: %v", string(tfr.term), tfr.field, string(tfr.doc), tfr.freq, tfr.norm, tfr.vectors)
+}
+
+func InitTermFrequencyRow(tfr *TermFrequencyRow, term []byte, field uint16, docID []byte, freq uint64, norm float32) *TermFrequencyRow {
+	tfr.term = term
+	tfr.field = field
+	tfr.doc = docID
+	tfr.freq = freq
+	tfr.norm = norm
+	return tfr
+}
+
+func NewTermFrequencyRow(term []byte, field uint16, docID []byte, freq uint64, norm float32) *TermFrequencyRow {
+	return &TermFrequencyRow{
+		term:  term,
+		field: field,
+		doc:   docID,
+		freq:  freq,
+		norm:  norm,
+	}
+}
+
+func NewTermFrequencyRowWithTermVectors(term []byte, field uint16, docID []byte, freq uint64, norm float32, vectors []*TermVector) *TermFrequencyRow {
+	return &TermFrequencyRow{
+		term:    term,
+		field:   field,
+		doc:     docID,
+		freq:    freq,
+		norm:    norm,
+		vectors: vectors,
+	}
+}
+
+func NewTermFrequencyRowK(key []byte) (*TermFrequencyRow, error) {
+	rv := &TermFrequencyRow{}
+	err := rv.parseK(key)
+	if err != nil {
+		return nil, err
+	}
+	return rv, nil
+}
+
+func (tfr *TermFrequencyRow) parseK(key []byte) error {
+	keyLen := len(key)
+	if keyLen < 3 {
+		return fmt.Errorf("invalid term frequency key, no valid field")
+	}
+	tfr.field = binary.LittleEndian.Uint16(key[1:3])
+
+	termEndPos := bytes.IndexByte(key[3:], ByteSeparator)
+	if termEndPos < 0 {
+		return fmt.Errorf("invalid term frequency key, no byte separator terminating term")
+	}
+	tfr.term = key[3 : 3+termEndPos]
+
+	docLen := keyLen - (3 + termEndPos + 1)
+	if docLen < 1 {
+		return fmt.Errorf("invalid term frequency key, empty docid")
+	}
+	tfr.doc = key[3+termEndPos+1:]
+
+	return nil
+}
+
+func (tfr *TermFrequencyRow) parseKDoc(key []byte, term []byte) error {
+	tfr.doc = key[3+len(term)+1:]
+	if len(tfr.doc) <= 0 {
+		return fmt.Errorf("invalid term frequency key, empty docid")
+	}
+
+	return nil
+}
+
+func (tfr *TermFrequencyRow) parseV(value []byte) error {
+	var bytesRead int
+	tfr.freq, bytesRead = binary.Uvarint(value)
+	if bytesRead <= 0 {
+		return fmt.Errorf("invalid term frequency value, invalid frequency")
+	}
+	currOffset := bytesRead
+
+	var norm uint64
+	norm, bytesRead = binary.Uvarint(value[currOffset:])
+	if bytesRead <= 0 {
+		return fmt.Errorf("invalid term frequency value, no norm")
+	}
+	currOffset += bytesRead
+
+	tfr.norm = math.Float32frombits(uint32(norm))
+
+	tfr.vectors = nil
+	var field uint64
+	field, bytesRead = binary.Uvarint(value[currOffset:])
+	for bytesRead > 0 {
+		currOffset += bytesRead
+		tv := TermVector{}
+		tv.field = uint16(field)
+		// at this point we expect at least one term vector
+		if tfr.vectors == nil {
+			tfr.vectors = make([]*TermVector, 0)
+		}
+
+		tv.pos, bytesRead = binary.Uvarint(value[currOffset:])
+		if bytesRead <= 0 {
+			return fmt.Errorf("invalid term frequency value, vector contains no position")
+		}
+		currOffset += bytesRead
+
+		tv.start, bytesRead = binary.Uvarint(value[currOffset:])
+		if bytesRead <= 0 {
+			return fmt.Errorf("invalid term frequency value, vector contains no start")
+		}
+		currOffset += bytesRead
+
+		tv.end, bytesRead = binary.Uvarint(value[currOffset:])
+		if bytesRead <= 0 {
+			return fmt.Errorf("invalid term frequency value, vector contains no end")
+		}
+		currOffset += bytesRead
+
+		var arrayPositionsLen uint64 = 0
+		arrayPositionsLen, bytesRead = binary.Uvarint(value[currOffset:])
+		if bytesRead <= 0 {
+			return fmt.Errorf("invalid term frequency value, vector contains no arrayPositionLen")
+		}
+		currOffset += bytesRead
+
+		if arrayPositionsLen > 0 {
+			tv.arrayPositions = make([]uint64, arrayPositionsLen)
+			for i := 0; uint64(i) < arrayPositionsLen; i++ {
+				tv.arrayPositions[i], bytesRead = binary.Uvarint(value[currOffset:])
+				if bytesRead <= 0 {
+					return fmt.Errorf("invalid term frequency value, vector contains no arrayPosition of index %d", i)
+				}
+				currOffset += bytesRead
+			}
+		}
+
+		tfr.vectors = append(tfr.vectors, &tv)
+		// try to read next record (may not exist)
+		field, bytesRead = binary.Uvarint(value[currOffset:])
+	}
+	if len(value[currOffset:]) > 0 && bytesRead <= 0 {
+		return fmt.Errorf("invalid term frequency value, vector field invalid")
+	}
+
+	return nil
+}
+
+func NewTermFrequencyRowKV(key, value []byte) (*TermFrequencyRow, error) {
+	rv, err := NewTermFrequencyRowK(key)
+	if err != nil {
+		return nil, err
+	}
+
+	err = rv.parseV(value)
+	if err != nil {
+		return nil, err
+	}
+	return rv, nil
+
+}
+
+type BackIndexRow struct {
+	doc           []byte
+	termEntries   []*BackIndexTermEntry
+	storedEntries []*BackIndexStoreEntry
+}
+
+func (br *BackIndexRow) AllTermKeys() [][]byte {
+	if br == nil {
+		return nil
+	}
+	rv := make([][]byte, len(br.termEntries))
+	for i, termEntry := range br.termEntries {
+		termRow := NewTermFrequencyRow([]byte(termEntry.GetTerm()), uint16(termEntry.GetField()), br.doc, 0, 0)
+		rv[i] = termRow.Key()
+	}
+	return rv
+}
+
+func (br *BackIndexRow) AllStoredKeys() [][]byte {
+	if br == nil {
+		return nil
+	}
+	rv := make([][]byte, len(br.storedEntries))
+	for i, storedEntry := range br.storedEntries {
+		storedRow := NewStoredRow(br.doc, uint16(storedEntry.GetField()), storedEntry.GetArrayPositions(), 'x', []byte{})
+		rv[i] = storedRow.Key()
+	}
+	return rv
+}
+
+func (br *BackIndexRow) Key() []byte {
+	buf := make([]byte, br.KeySize())
+	size, _ := br.KeyTo(buf)
+	return buf[:size]
+}
+
+func (br *BackIndexRow) KeySize() int {
+	return len(br.doc) + 1
+}
+
+func (br *BackIndexRow) KeyTo(buf []byte) (int, error) {
+	buf[0] = 'b'
+	used := copy(buf[1:], br.doc)
+	return used + 1, nil
+}
+
+func (br *BackIndexRow) Value() []byte {
+	buf := make([]byte, br.ValueSize())
+	size, _ := br.ValueTo(buf)
+	return buf[:size]
+}
+
+func (br *BackIndexRow) ValueSize() int {
+	birv := &BackIndexRowValue{
+		TermEntries:   br.termEntries,
+		StoredEntries: br.storedEntries,
+	}
+	return birv.Size()
+}
+
+func (br *BackIndexRow) ValueTo(buf []byte) (int, error) {
+	birv := &BackIndexRowValue{
+		TermEntries:   br.termEntries,
+		StoredEntries: br.storedEntries,
+	}
+	return birv.MarshalTo(buf)
+}
+
+func (br *BackIndexRow) String() string {
+	return fmt.Sprintf("Backindex DocId: `%s` Term Entries: %v, Stored Entries: %v", string(br.doc), br.termEntries, br.storedEntries)
+}
+
+func NewBackIndexRow(docID []byte, entries []*BackIndexTermEntry, storedFields []*BackIndexStoreEntry) *BackIndexRow {
+	return &BackIndexRow{
+		doc:           docID,
+		termEntries:   entries,
+		storedEntries: storedFields,
+	}
+}
+
+func NewBackIndexRowKV(key, value []byte) (*BackIndexRow, error) {
+	rv := BackIndexRow{}
+
+	buf := bytes.NewBuffer(key)
+	_, err := buf.ReadByte() // type
+	if err != nil {
+		return nil, err
+	}
+
+	rv.doc, err = buf.ReadBytes(ByteSeparator)
+	if err == io.EOF && len(rv.doc) < 1 {
+		err = fmt.Errorf("invalid doc length 0 - % x", key)
+	}
+	if err != nil && err != io.EOF {
+		return nil, err
+	} else if err == nil {
+		rv.doc = rv.doc[:len(rv.doc)-1] // trim off separator byte
+	}
+
+	var birv BackIndexRowValue
+	err = proto.Unmarshal(value, &birv)
+	if err != nil {
+		return nil, err
+	}
+	rv.termEntries = birv.TermEntries
+	rv.storedEntries = birv.StoredEntries
+
+	return &rv, nil
+}
+
+// STORED
+
+type StoredRow struct {
+	doc            []byte
+	field          uint16
+	arrayPositions []uint64
+	typ            byte
+	value          []byte
+}
+
+func (s *StoredRow) Key() []byte {
+	buf := make([]byte, s.KeySize())
+	size, _ := s.KeyTo(buf)
+	return buf[0:size]
+}
+
+func (s *StoredRow) KeySize() int {
+	return 1 + len(s.doc) + 1 + 2 + (binary.MaxVarintLen64 * len(s.arrayPositions))
+}
+
+func (s *StoredRow) KeyTo(buf []byte) (int, error) {
+	docLen := len(s.doc)
+	buf[0] = 's'
+	copy(buf[1:], s.doc)
+	buf[1+docLen] = ByteSeparator
+	binary.LittleEndian.PutUint16(buf[1+docLen+1:], s.field)
+	bytesUsed := 1 + docLen + 1 + 2
+	for _, arrayPosition := range s.arrayPositions {
+		varbytes := binary.PutUvarint(buf[bytesUsed:], arrayPosition)
+		bytesUsed += varbytes
+	}
+	return bytesUsed, nil
+}
+
+func (s *StoredRow) Value() []byte {
+	buf := make([]byte, s.ValueSize())
+	size, _ := s.ValueTo(buf)
+	return buf[:size]
+}
+
+func (s *StoredRow) ValueSize() int {
+	return len(s.value) + 1
+}
+
+func (s *StoredRow) ValueTo(buf []byte) (int, error) {
+	buf[0] = s.typ
+	used := copy(buf[1:], s.value)
+	return used + 1, nil
+}
+
+func (s *StoredRow) String() string {
+	return fmt.Sprintf("Document: %s Field %d, Array Positions: %v, Type: %s Value: %s", s.doc, s.field, s.arrayPositions, string(s.typ), s.value)
+}
+
+func (s *StoredRow) ScanPrefixForDoc() []byte {
+	docLen := len(s.doc)
+	buf := make([]byte, 1+docLen+1)
+	buf[0] = 's'
+	copy(buf[1:], s.doc)
+	buf[1+docLen] = ByteSeparator
+	return buf
+}
+
+func NewStoredRow(docID []byte, field uint16, arrayPositions []uint64, typ byte, value []byte) *StoredRow {
+	return &StoredRow{
+		doc:            docID,
+		field:          field,
+		arrayPositions: arrayPositions,
+		typ:            typ,
+		value:          value,
+	}
+}
+
+func NewStoredRowK(key []byte) (*StoredRow, error) {
+	rv := StoredRow{}
+
+	buf := bytes.NewBuffer(key)
+	_, err := buf.ReadByte() // type
+	if err != nil {
+		return nil, err
+	}
+
+	rv.doc, err = buf.ReadBytes(ByteSeparator)
+	if len(rv.doc) < 2 { // 1 for min doc id length, 1 for separator
+		err = fmt.Errorf("invalid doc length 0")
+		return nil, err
+	}
+
+	rv.doc = rv.doc[:len(rv.doc)-1] // trim off separator byte
+
+	err = binary.Read(buf, binary.LittleEndian, &rv.field)
+	if err != nil {
+		return nil, err
+	}
+
+	rv.arrayPositions = make([]uint64, 0)
+	nextArrayPos, err := binary.ReadUvarint(buf)
+	for err == nil {
+		rv.arrayPositions = append(rv.arrayPositions, nextArrayPos)
+		nextArrayPos, err = binary.ReadUvarint(buf)
+	}
+	return &rv, nil
+}
+
+func NewStoredRowKV(key, value []byte) (*StoredRow, error) {
+	rv, err := NewStoredRowK(key)
+	if err != nil {
+		return nil, err
+	}
+	rv.typ = value[0]
+	rv.value = value[1:]
+	return rv, nil
+}

vendor/github.com/blevesearch/bleve/index/upsidedown/row_merge.go

@@ -0,0 +1,76 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package upsidedown
+
+import (
+	"encoding/binary"
+)
+
+var mergeOperator upsideDownMerge
+
+var dictionaryTermIncr []byte
+var dictionaryTermDecr []byte
+
+func init() {
+	dictionaryTermIncr = make([]byte, 8)
+	binary.LittleEndian.PutUint64(dictionaryTermIncr, uint64(1))
+	dictionaryTermDecr = make([]byte, 8)
+	var negOne = int64(-1)
+	binary.LittleEndian.PutUint64(dictionaryTermDecr, uint64(negOne))
+}
+
+type upsideDownMerge struct{}
+
+func (m *upsideDownMerge) FullMerge(key, existingValue []byte, operands [][]byte) ([]byte, bool) {
+	// set up record based on key
+	dr, err := NewDictionaryRowK(key)
+	if err != nil {
+		return nil, false
+	}
+	if len(existingValue) > 0 {
+		// if existing value, parse it
+		err = dr.parseDictionaryV(existingValue)
+		if err != nil {
+			return nil, false
+		}
+	}
+
+	// now process operands
+	for _, operand := range operands {
+		next := int64(binary.LittleEndian.Uint64(operand))
+		if next < 0 && uint64(-next) > dr.count {
+			// subtracting next from existing would overflow
+			dr.count = 0
+		} else if next < 0 {
+			dr.count -= uint64(-next)
+		} else {
+			dr.count += uint64(next)
+		}
+	}
+
+	return dr.Value(), true
+}
+
+func (m *upsideDownMerge) PartialMerge(key, leftOperand, rightOperand []byte) ([]byte, bool) {
+	left := int64(binary.LittleEndian.Uint64(leftOperand))
+	right := int64(binary.LittleEndian.Uint64(rightOperand))
+	rv := make([]byte, 8)
+	binary.LittleEndian.PutUint64(rv, uint64(left+right))
+	return rv, true
+}
+
+func (m *upsideDownMerge) Name() string {
+	return "upsideDownMerge"
+}

vendor/github.com/blevesearch/bleve/index/upsidedown/stats.go

@@ -0,0 +1,55 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package upsidedown
+
+import (
+	"encoding/json"
+	"sync/atomic"
+
+	"github.com/blevesearch/bleve/index/store"
+)
+
+type indexStat struct {
+	updates, deletes, batches, errors uint64
+	analysisTime, indexTime           uint64
+	termSearchersStarted              uint64
+	termSearchersFinished             uint64
+	numPlainTextBytesIndexed          uint64
+	i                                 *UpsideDownCouch
+}
+
+func (i *indexStat) statsMap() map[string]interface{} {
+	m := map[string]interface{}{}
+	m["updates"] = atomic.LoadUint64(&i.updates)
+	m["deletes"] = atomic.LoadUint64(&i.deletes)
+	m["batches"] = atomic.LoadUint64(&i.batches)
+	m["errors"] = atomic.LoadUint64(&i.errors)
+	m["analysis_time"] = atomic.LoadUint64(&i.analysisTime)
+	m["index_time"] = atomic.LoadUint64(&i.indexTime)
+	m["term_searchers_started"] = atomic.LoadUint64(&i.termSearchersStarted)
+	m["term_searchers_finished"] = atomic.LoadUint64(&i.termSearchersFinished)
+	m["num_plain_text_bytes_indexed"] = atomic.LoadUint64(&i.numPlainTextBytesIndexed)
+
+	if o, ok := i.i.store.(store.KVStoreStats); ok {
+		m["kv"] = o.StatsMap()
+	}
+
+	return m
+}
+
+func (i *indexStat) MarshalJSON() ([]byte, error) {
+	m := i.statsMap()
+	return json.Marshal(m)
+}

vendor/github.com/blevesearch/bleve/index/upsidedown/upsidedown.pb.go

@@ -0,0 +1,684 @@
+// Code generated by protoc-gen-gogo.
+// source: upsidedown.proto
+// DO NOT EDIT!
+
+/*
+Package upsidedown is a generated protocol buffer package.
+
+It is generated from these files:
+	upsidedown.proto
+
+It has these top-level messages:
+	BackIndexTermEntry
+	BackIndexStoreEntry
+	BackIndexRowValue
+*/
+package upsidedown
+
+import proto "github.com/golang/protobuf/proto"
+import math "math"
+
+import io "io"
+import fmt "fmt"
+import github_com_golang_protobuf_proto "github.com/golang/protobuf/proto"
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = math.Inf
+
+type BackIndexTermEntry struct {
+	Term             *string `protobuf:"bytes,1,req,name=term" json:"term,omitempty"`
+	Field            *uint32 `protobuf:"varint,2,req,name=field" json:"field,omitempty"`
+	XXX_unrecognized []byte  `json:"-"`
+}
+
+func (m *BackIndexTermEntry) Reset()         { *m = BackIndexTermEntry{} }
+func (m *BackIndexTermEntry) String() string { return proto.CompactTextString(m) }
+func (*BackIndexTermEntry) ProtoMessage()    {}
+
+func (m *BackIndexTermEntry) GetTerm() string {
+	if m != nil && m.Term != nil {
+		return *m.Term
+	}
+	return ""
+}
+
+func (m *BackIndexTermEntry) GetField() uint32 {
+	if m != nil && m.Field != nil {
+		return *m.Field
+	}
+	return 0
+}
+
+type BackIndexStoreEntry struct {
+	Field            *uint32  `protobuf:"varint,1,req,name=field" json:"field,omitempty"`
+	ArrayPositions   []uint64 `protobuf:"varint,2,rep,name=arrayPositions" json:"arrayPositions,omitempty"`
+	XXX_unrecognized []byte   `json:"-"`
+}
+
+func (m *BackIndexStoreEntry) Reset()         { *m = BackIndexStoreEntry{} }
+func (m *BackIndexStoreEntry) String() string { return proto.CompactTextString(m) }
+func (*BackIndexStoreEntry) ProtoMessage()    {}
+
+func (m *BackIndexStoreEntry) GetField() uint32 {
+	if m != nil && m.Field != nil {
+		return *m.Field
+	}
+	return 0
+}
+
+func (m *BackIndexStoreEntry) GetArrayPositions() []uint64 {
+	if m != nil {
+		return m.ArrayPositions
+	}
+	return nil
+}
+
+type BackIndexRowValue struct {
+	TermEntries      []*BackIndexTermEntry  `protobuf:"bytes,1,rep,name=termEntries" json:"termEntries,omitempty"`
+	StoredEntries    []*BackIndexStoreEntry `protobuf:"bytes,2,rep,name=storedEntries" json:"storedEntries,omitempty"`
+	XXX_unrecognized []byte                 `json:"-"`
+}
+
+func (m *BackIndexRowValue) Reset()         { *m = BackIndexRowValue{} }
+func (m *BackIndexRowValue) String() string { return proto.CompactTextString(m) }
+func (*BackIndexRowValue) ProtoMessage()    {}
+
+func (m *BackIndexRowValue) GetTermEntries() []*BackIndexTermEntry {
+	if m != nil {
+		return m.TermEntries
+	}
+	return nil
+}
+
+func (m *BackIndexRowValue) GetStoredEntries() []*BackIndexStoreEntry {
+	if m != nil {
+		return m.StoredEntries
+	}
+	return nil
+}
+
+func (m *BackIndexTermEntry) Unmarshal(data []byte) error {
+	var hasFields [1]uint64
+	l := len(data)
+	iNdEx := 0
+	for iNdEx < l {
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if iNdEx >= l {
+				return io.ErrUnexpectedEOF
+			}
+			b := data[iNdEx]
+			iNdEx++
+			wire |= (uint64(b) & 0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		fieldNum := int32(wire >> 3)
+		wireType := int(wire & 0x7)
+		switch fieldNum {
+		case 1:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Term", wireType)
+			}
+			var stringLen uint64
+			for shift := uint(0); ; shift += 7 {
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := data[iNdEx]
+				iNdEx++
+				stringLen |= (uint64(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			postIndex := iNdEx + int(stringLen)
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			s := string(data[iNdEx:postIndex])
+			m.Term = &s
+			iNdEx = postIndex
+			hasFields[0] |= uint64(0x00000001)
+		case 2:
+			if wireType != 0 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Field", wireType)
+			}
+			var v uint32
+			for shift := uint(0); ; shift += 7 {
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := data[iNdEx]
+				iNdEx++
+				v |= (uint32(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			m.Field = &v
+			hasFields[0] |= uint64(0x00000002)
+		default:
+			var sizeOfWire int
+			for {
+				sizeOfWire++
+				wire >>= 7
+				if wire == 0 {
+					break
+				}
+			}
+			iNdEx -= sizeOfWire
+			skippy, err := skipUpsidedown(data[iNdEx:])
+			if err != nil {
+				return err
+			}
+			if skippy < 0 {
+				return ErrInvalidLengthUpsidedown
+			}
+			if (iNdEx + skippy) > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.XXX_unrecognized = append(m.XXX_unrecognized, data[iNdEx:iNdEx+skippy]...)
+			iNdEx += skippy
+		}
+	}
+	if hasFields[0]&uint64(0x00000001) == 0 {
+		return new(github_com_golang_protobuf_proto.RequiredNotSetError)
+	}
+	if hasFields[0]&uint64(0x00000002) == 0 {
+		return new(github_com_golang_protobuf_proto.RequiredNotSetError)
+	}
+
+	return nil
+}
+func (m *BackIndexStoreEntry) Unmarshal(data []byte) error {
+	var hasFields [1]uint64
+	l := len(data)
+	iNdEx := 0
+	for iNdEx < l {
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if iNdEx >= l {
+				return io.ErrUnexpectedEOF
+			}
+			b := data[iNdEx]
+			iNdEx++
+			wire |= (uint64(b) & 0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		fieldNum := int32(wire >> 3)
+		wireType := int(wire & 0x7)
+		switch fieldNum {
+		case 1:
+			if wireType != 0 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Field", wireType)
+			}
+			var v uint32
+			for shift := uint(0); ; shift += 7 {
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := data[iNdEx]
+				iNdEx++
+				v |= (uint32(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			m.Field = &v
+			hasFields[0] |= uint64(0x00000001)
+		case 2:
+			if wireType != 0 {
+				return fmt.Errorf("proto: wrong wireType = %d for field ArrayPositions", wireType)
+			}
+			var v uint64
+			for shift := uint(0); ; shift += 7 {
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := data[iNdEx]
+				iNdEx++
+				v |= (uint64(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			m.ArrayPositions = append(m.ArrayPositions, v)
+		default:
+			var sizeOfWire int
+			for {
+				sizeOfWire++
+				wire >>= 7
+				if wire == 0 {
+					break
+				}
+			}
+			iNdEx -= sizeOfWire
+			skippy, err := skipUpsidedown(data[iNdEx:])
+			if err != nil {
+				return err
+			}
+			if skippy < 0 {
+				return ErrInvalidLengthUpsidedown
+			}
+			if (iNdEx + skippy) > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.XXX_unrecognized = append(m.XXX_unrecognized, data[iNdEx:iNdEx+skippy]...)
+			iNdEx += skippy
+		}
+	}
+	if hasFields[0]&uint64(0x00000001) == 0 {
+		return new(github_com_golang_protobuf_proto.RequiredNotSetError)
+	}
+
+	return nil
+}
+func (m *BackIndexRowValue) Unmarshal(data []byte) error {
+	l := len(data)
+	iNdEx := 0
+	for iNdEx < l {
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if iNdEx >= l {
+				return io.ErrUnexpectedEOF
+			}
+			b := data[iNdEx]
+			iNdEx++
+			wire |= (uint64(b) & 0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		fieldNum := int32(wire >> 3)
+		wireType := int(wire & 0x7)
+		switch fieldNum {
+		case 1:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field TermEntries", wireType)
+			}
+			var msglen int
+			for shift := uint(0); ; shift += 7 {
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := data[iNdEx]
+				iNdEx++
+				msglen |= (int(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			postIndex := iNdEx + msglen
+			if msglen < 0 {
+				return ErrInvalidLengthUpsidedown
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.TermEntries = append(m.TermEntries, &BackIndexTermEntry{})
+			if err := m.TermEntries[len(m.TermEntries)-1].Unmarshal(data[iNdEx:postIndex]); err != nil {
+				return err
+			}
+			iNdEx = postIndex
+		case 2:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field StoredEntries", wireType)
+			}
+			var msglen int
+			for shift := uint(0); ; shift += 7 {
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := data[iNdEx]
+				iNdEx++
+				msglen |= (int(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			postIndex := iNdEx + msglen
+			if msglen < 0 {
+				return ErrInvalidLengthUpsidedown
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.StoredEntries = append(m.StoredEntries, &BackIndexStoreEntry{})
+			if err := m.StoredEntries[len(m.StoredEntries)-1].Unmarshal(data[iNdEx:postIndex]); err != nil {
+				return err
+			}
+			iNdEx = postIndex
+		default:
+			var sizeOfWire int
+			for {
+				sizeOfWire++
+				wire >>= 7
+				if wire == 0 {
+					break
+				}
+			}
+			iNdEx -= sizeOfWire
+			skippy, err := skipUpsidedown(data[iNdEx:])
+			if err != nil {
+				return err
+			}
+			if skippy < 0 {
+				return ErrInvalidLengthUpsidedown
+			}
+			if (iNdEx + skippy) > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.XXX_unrecognized = append(m.XXX_unrecognized, data[iNdEx:iNdEx+skippy]...)
+			iNdEx += skippy
+		}
+	}
+
+	return nil
+}
+func skipUpsidedown(data []byte) (n int, err error) {
+	l := len(data)
+	iNdEx := 0
+	for iNdEx < l {
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if iNdEx >= l {
+				return 0, io.ErrUnexpectedEOF
+			}
+			b := data[iNdEx]
+			iNdEx++
+			wire |= (uint64(b) & 0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		wireType := int(wire & 0x7)
+		switch wireType {
+		case 0:
+			for {
+				if iNdEx >= l {
+					return 0, io.ErrUnexpectedEOF
+				}
+				iNdEx++
+				if data[iNdEx-1] < 0x80 {
+					break
+				}
+			}
+			return iNdEx, nil
+		case 1:
+			iNdEx += 8
+			return iNdEx, nil
+		case 2:
+			var length int
+			for shift := uint(0); ; shift += 7 {
+				if iNdEx >= l {
+					return 0, io.ErrUnexpectedEOF
+				}
+				b := data[iNdEx]
+				iNdEx++
+				length |= (int(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			iNdEx += length
+			if length < 0 {
+				return 0, ErrInvalidLengthUpsidedown
+			}
+			return iNdEx, nil
+		case 3:
+			for {
+				var innerWire uint64
+				var start int = iNdEx
+				for shift := uint(0); ; shift += 7 {
+					if iNdEx >= l {
+						return 0, io.ErrUnexpectedEOF
+					}
+					b := data[iNdEx]
+					iNdEx++
+					innerWire |= (uint64(b) & 0x7F) << shift
+					if b < 0x80 {
+						break
+					}
+				}
+				innerWireType := int(innerWire & 0x7)
+				if innerWireType == 4 {
+					break
+				}
+				next, err := skipUpsidedown(data[start:])
+				if err != nil {
+					return 0, err
+				}
+				iNdEx = start + next
+			}
+			return iNdEx, nil
+		case 4:
+			return iNdEx, nil
+		case 5:
+			iNdEx += 4
+			return iNdEx, nil
+		default:
+			return 0, fmt.Errorf("proto: illegal wireType %d", wireType)
+		}
+	}
+	panic("unreachable")
+}
+
+var (
+	ErrInvalidLengthUpsidedown = fmt.Errorf("proto: negative length found during unmarshaling")
+)
+
+func (m *BackIndexTermEntry) Size() (n int) {
+	var l int
+	_ = l
+	if m.Term != nil {
+		l = len(*m.Term)
+		n += 1 + l + sovUpsidedown(uint64(l))
+	}
+	if m.Field != nil {
+		n += 1 + sovUpsidedown(uint64(*m.Field))
+	}
+	if m.XXX_unrecognized != nil {
+		n += len(m.XXX_unrecognized)
+	}
+	return n
+}
+
+func (m *BackIndexStoreEntry) Size() (n int) {
+	var l int
+	_ = l
+	if m.Field != nil {
+		n += 1 + sovUpsidedown(uint64(*m.Field))
+	}
+	if len(m.ArrayPositions) > 0 {
+		for _, e := range m.ArrayPositions {
+			n += 1 + sovUpsidedown(uint64(e))
+		}
+	}
+	if m.XXX_unrecognized != nil {
+		n += len(m.XXX_unrecognized)
+	}
+	return n
+}
+
+func (m *BackIndexRowValue) Size() (n int) {
+	var l int
+	_ = l
+	if len(m.TermEntries) > 0 {
+		for _, e := range m.TermEntries {
+			l = e.Size()
+			n += 1 + l + sovUpsidedown(uint64(l))
+		}
+	}
+	if len(m.StoredEntries) > 0 {
+		for _, e := range m.StoredEntries {
+			l = e.Size()
+			n += 1 + l + sovUpsidedown(uint64(l))
+		}
+	}
+	if m.XXX_unrecognized != nil {
+		n += len(m.XXX_unrecognized)
+	}
+	return n
+}
+
+func sovUpsidedown(x uint64) (n int) {
+	for {
+		n++
+		x >>= 7
+		if x == 0 {
+			break
+		}
+	}
+	return n
+}
+func sozUpsidedown(x uint64) (n int) {
+	return sovUpsidedown(uint64((x << 1) ^ uint64((int64(x) >> 63))))
+}
+func (m *BackIndexTermEntry) Marshal() (data []byte, err error) {
+	size := m.Size()
+	data = make([]byte, size)
+	n, err := m.MarshalTo(data)
+	if err != nil {
+		return nil, err
+	}
+	return data[:n], nil
+}
+
+func (m *BackIndexTermEntry) MarshalTo(data []byte) (n int, err error) {
+	var i int
+	_ = i
+	var l int
+	_ = l
+	if m.Term == nil {
+		return 0, new(github_com_golang_protobuf_proto.RequiredNotSetError)
+	} else {
+		data[i] = 0xa
+		i++
+		i = encodeVarintUpsidedown(data, i, uint64(len(*m.Term)))
+		i += copy(data[i:], *m.Term)
+	}
+	if m.Field == nil {
+		return 0, new(github_com_golang_protobuf_proto.RequiredNotSetError)
+	} else {
+		data[i] = 0x10
+		i++
+		i = encodeVarintUpsidedown(data, i, uint64(*m.Field))
+	}
+	if m.XXX_unrecognized != nil {
+		i += copy(data[i:], m.XXX_unrecognized)
+	}
+	return i, nil
+}
+
+func (m *BackIndexStoreEntry) Marshal() (data []byte, err error) {
+	size := m.Size()
+	data = make([]byte, size)
+	n, err := m.MarshalTo(data)
+	if err != nil {
+		return nil, err
+	}
+	return data[:n], nil
+}
+
+func (m *BackIndexStoreEntry) MarshalTo(data []byte) (n int, err error) {
+	var i int
+	_ = i
+	var l int
+	_ = l
+	if m.Field == nil {
+		return 0, new(github_com_golang_protobuf_proto.RequiredNotSetError)
+	} else {
+		data[i] = 0x8
+		i++
+		i = encodeVarintUpsidedown(data, i, uint64(*m.Field))
+	}
+	if len(m.ArrayPositions) > 0 {
+		for _, num := range m.ArrayPositions {
+			data[i] = 0x10
+			i++
+			i = encodeVarintUpsidedown(data, i, uint64(num))
+		}
+	}
+	if m.XXX_unrecognized != nil {
+		i += copy(data[i:], m.XXX_unrecognized)
+	}
+	return i, nil
+}
+
+func (m *BackIndexRowValue) Marshal() (data []byte, err error) {
+	size := m.Size()
+	data = make([]byte, size)
+	n, err := m.MarshalTo(data)
+	if err != nil {
+		return nil, err
+	}
+	return data[:n], nil
+}
+
+func (m *BackIndexRowValue) MarshalTo(data []byte) (n int, err error) {
+	var i int
+	_ = i
+	var l int
+	_ = l
+	if len(m.TermEntries) > 0 {
+		for _, msg := range m.TermEntries {
+			data[i] = 0xa
+			i++
+			i = encodeVarintUpsidedown(data, i, uint64(msg.Size()))
+			n, err := msg.MarshalTo(data[i:])
+			if err != nil {
+				return 0, err
+			}
+			i += n
+		}
+	}
+	if len(m.StoredEntries) > 0 {
+		for _, msg := range m.StoredEntries {
+			data[i] = 0x12
+			i++
+			i = encodeVarintUpsidedown(data, i, uint64(msg.Size()))
+			n, err := msg.MarshalTo(data[i:])
+			if err != nil {
+				return 0, err
+			}
+			i += n
+		}
+	}
+	if m.XXX_unrecognized != nil {
+		i += copy(data[i:], m.XXX_unrecognized)
+	}
+	return i, nil
+}
+
+func encodeFixed64Upsidedown(data []byte, offset int, v uint64) int {
+	data[offset] = uint8(v)
+	data[offset+1] = uint8(v >> 8)
+	data[offset+2] = uint8(v >> 16)
+	data[offset+3] = uint8(v >> 24)
+	data[offset+4] = uint8(v >> 32)
+	data[offset+5] = uint8(v >> 40)
+	data[offset+6] = uint8(v >> 48)
+	data[offset+7] = uint8(v >> 56)
+	return offset + 8
+}
+func encodeFixed32Upsidedown(data []byte, offset int, v uint32) int {
+	data[offset] = uint8(v)
+	data[offset+1] = uint8(v >> 8)
+	data[offset+2] = uint8(v >> 16)
+	data[offset+3] = uint8(v >> 24)
+	return offset + 4
+}
+func encodeVarintUpsidedown(data []byte, offset int, v uint64) int {
+	for v >= 1<<7 {
+		data[offset] = uint8(v&0x7f | 0x80)
+		v >>= 7
+		offset++
+	}
+	data[offset] = uint8(v)
+	return offset + 1
+}

vendor/github.com/blevesearch/bleve/index/upsidedown/upsidedown.proto

@@ -0,0 +1,14 @@
+message BackIndexTermEntry {
+	required string term = 1;
+	required uint32 field = 2;
+}
+
+message BackIndexStoreEntry {
+	required uint32 field = 1;
+	repeated uint64 arrayPositions = 2;
+}
+
+message BackIndexRowValue {
+	repeated BackIndexTermEntry termEntries = 1;
+	repeated BackIndexStoreEntry storedEntries = 2;
+}

vendor/github.com/blevesearch/bleve/index_alias.go

@@ -0,0 +1,37 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package bleve
+
+// An IndexAlias is a wrapper around one or more
+// Index objects.  It has two distinct modes of
+// operation.
+// 1.  When it points to a single index, ALL index
+// operations are valid and will be passed through
+// to the underlying index.
+// 2.  When it points to more than one index, the only
+// valid operation is Search.  In this case the
+// search will be performed across all the
+// underlying indexes and the results merged.
+// Calls to Add/Remove/Swap the underlying indexes
+// are atomic, so you can safely change the
+// underlying Index objects while other components
+// are performing operations.
+type IndexAlias interface {
+	Index
+
+	Add(i ...Index)
+	Remove(i ...Index)
+	Swap(in, out []Index)
+}

vendor/github.com/blevesearch/bleve/index_alias_impl.go

@@ -0,0 +1,605 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package bleve
+
+import (
+	"sort"
+	"sync"
+	"time"
+
+	"golang.org/x/net/context"
+
+	"github.com/blevesearch/bleve/document"
+	"github.com/blevesearch/bleve/index"
+	"github.com/blevesearch/bleve/index/store"
+	"github.com/blevesearch/bleve/mapping"
+	"github.com/blevesearch/bleve/search"
+)
+
+type indexAliasImpl struct {
+	name    string
+	indexes []Index
+	mutex   sync.RWMutex
+	open    bool
+}
+
+// NewIndexAlias creates a new IndexAlias over the provided
+// Index objects.
+func NewIndexAlias(indexes ...Index) *indexAliasImpl {
+	return &indexAliasImpl{
+		name:    "alias",
+		indexes: indexes,
+		open:    true,
+	}
+}
+
+func (i *indexAliasImpl) isAliasToSingleIndex() error {
+	if len(i.indexes) < 1 {
+		return ErrorAliasEmpty
+	} else if len(i.indexes) > 1 {
+		return ErrorAliasMulti
+	}
+	return nil
+}
+
+func (i *indexAliasImpl) Index(id string, data interface{}) error {
+	i.mutex.RLock()
+	defer i.mutex.RUnlock()
+
+	if !i.open {
+		return ErrorIndexClosed
+	}
+
+	err := i.isAliasToSingleIndex()
+	if err != nil {
+		return err
+	}
+
+	return i.indexes[0].Index(id, data)
+}
+
+func (i *indexAliasImpl) Delete(id string) error {
+	i.mutex.RLock()
+	defer i.mutex.RUnlock()
+
+	if !i.open {
+		return ErrorIndexClosed
+	}
+
+	err := i.isAliasToSingleIndex()
+	if err != nil {
+		return err
+	}
+
+	return i.indexes[0].Delete(id)
+}
+
+func (i *indexAliasImpl) Batch(b *Batch) error {
+	i.mutex.RLock()
+	defer i.mutex.RUnlock()
+
+	if !i.open {
+		return ErrorIndexClosed
+	}
+
+	err := i.isAliasToSingleIndex()
+	if err != nil {
+		return err
+	}
+
+	return i.indexes[0].Batch(b)
+}
+
+func (i *indexAliasImpl) Document(id string) (*document.Document, error) {
+	i.mutex.RLock()
+	defer i.mutex.RUnlock()
+
+	if !i.open {
+		return nil, ErrorIndexClosed
+	}
+
+	err := i.isAliasToSingleIndex()
+	if err != nil {
+		return nil, err
+	}
+
+	return i.indexes[0].Document(id)
+}
+
+func (i *indexAliasImpl) DocCount() (uint64, error) {
+	i.mutex.RLock()
+	defer i.mutex.RUnlock()
+
+	rv := uint64(0)
+
+	if !i.open {
+		return 0, ErrorIndexClosed
+	}
+
+	for _, index := range i.indexes {
+		otherCount, err := index.DocCount()
+		if err == nil {
+			rv += otherCount
+		}
+		// tolerate errors to produce partial counts
+	}
+
+	return rv, nil
+}
+
+func (i *indexAliasImpl) Search(req *SearchRequest) (*SearchResult, error) {
+	return i.SearchInContext(context.Background(), req)
+}
+
+func (i *indexAliasImpl) SearchInContext(ctx context.Context, req *SearchRequest) (*SearchResult, error) {
+	i.mutex.RLock()
+	defer i.mutex.RUnlock()
+
+	if !i.open {
+		return nil, ErrorIndexClosed
+	}
+
+	if len(i.indexes) < 1 {
+		return nil, ErrorAliasEmpty
+	}
+
+	// short circuit the simple case
+	if len(i.indexes) == 1 {
+		return i.indexes[0].SearchInContext(ctx, req)
+	}
+
+	return MultiSearch(ctx, req, i.indexes...)
+}
+
+func (i *indexAliasImpl) Fields() ([]string, error) {
+	i.mutex.RLock()
+	defer i.mutex.RUnlock()
+
+	if !i.open {
+		return nil, ErrorIndexClosed
+	}
+
+	err := i.isAliasToSingleIndex()
+	if err != nil {
+		return nil, err
+	}
+
+	return i.indexes[0].Fields()
+}
+
+func (i *indexAliasImpl) FieldDict(field string) (index.FieldDict, error) {
+	i.mutex.RLock()
+
+	if !i.open {
+		i.mutex.RUnlock()
+		return nil, ErrorIndexClosed
+	}
+
+	err := i.isAliasToSingleIndex()
+	if err != nil {
+		i.mutex.RUnlock()
+		return nil, err
+	}
+
+	fieldDict, err := i.indexes[0].FieldDict(field)
+	if err != nil {
+		i.mutex.RUnlock()
+		return nil, err
+	}
+
+	return &indexAliasImplFieldDict{
+		index:     i,
+		fieldDict: fieldDict,
+	}, nil
+}
+
+func (i *indexAliasImpl) FieldDictRange(field string, startTerm []byte, endTerm []byte) (index.FieldDict, error) {
+	i.mutex.RLock()
+
+	if !i.open {
+		i.mutex.RUnlock()
+		return nil, ErrorIndexClosed
+	}
+
+	err := i.isAliasToSingleIndex()
+	if err != nil {
+		i.mutex.RUnlock()
+		return nil, err
+	}
+
+	fieldDict, err := i.indexes[0].FieldDictRange(field, startTerm, endTerm)
+	if err != nil {
+		i.mutex.RUnlock()
+		return nil, err
+	}
+
+	return &indexAliasImplFieldDict{
+		index:     i,
+		fieldDict: fieldDict,
+	}, nil
+}
+
+func (i *indexAliasImpl) FieldDictPrefix(field string, termPrefix []byte) (index.FieldDict, error) {
+	i.mutex.RLock()
+
+	if !i.open {
+		i.mutex.RUnlock()
+		return nil, ErrorIndexClosed
+	}
+
+	err := i.isAliasToSingleIndex()
+	if err != nil {
+		i.mutex.RUnlock()
+		return nil, err
+	}
+
+	fieldDict, err := i.indexes[0].FieldDictPrefix(field, termPrefix)
+	if err != nil {
+		i.mutex.RUnlock()
+		return nil, err
+	}
+
+	return &indexAliasImplFieldDict{
+		index:     i,
+		fieldDict: fieldDict,
+	}, nil
+}
+
+func (i *indexAliasImpl) Close() error {
+	i.mutex.Lock()
+	defer i.mutex.Unlock()
+
+	i.open = false
+	return nil
+}
+
+func (i *indexAliasImpl) Mapping() mapping.IndexMapping {
+	i.mutex.RLock()
+	defer i.mutex.RUnlock()
+
+	if !i.open {
+		return nil
+	}
+
+	err := i.isAliasToSingleIndex()
+	if err != nil {
+		return nil
+	}
+
+	return i.indexes[0].Mapping()
+}
+
+func (i *indexAliasImpl) Stats() *IndexStat {
+	i.mutex.RLock()
+	defer i.mutex.RUnlock()
+
+	if !i.open {
+		return nil
+	}
+
+	err := i.isAliasToSingleIndex()
+	if err != nil {
+		return nil
+	}
+
+	return i.indexes[0].Stats()
+}
+
+func (i *indexAliasImpl) StatsMap() map[string]interface{} {
+	i.mutex.RLock()
+	defer i.mutex.RUnlock()
+
+	if !i.open {
+		return nil
+	}
+
+	err := i.isAliasToSingleIndex()
+	if err != nil {
+		return nil
+	}
+
+	return i.indexes[0].StatsMap()
+}
+
+func (i *indexAliasImpl) GetInternal(key []byte) ([]byte, error) {
+	i.mutex.RLock()
+	defer i.mutex.RUnlock()
+
+	if !i.open {
+		return nil, ErrorIndexClosed
+	}
+
+	err := i.isAliasToSingleIndex()
+	if err != nil {
+		return nil, err
+	}
+
+	return i.indexes[0].GetInternal(key)
+}
+
+func (i *indexAliasImpl) SetInternal(key, val []byte) error {
+	i.mutex.RLock()
+	defer i.mutex.RUnlock()
+
+	if !i.open {
+		return ErrorIndexClosed
+	}
+
+	err := i.isAliasToSingleIndex()
+	if err != nil {
+		return err
+	}
+
+	return i.indexes[0].SetInternal(key, val)
+}
+
+func (i *indexAliasImpl) DeleteInternal(key []byte) error {
+	i.mutex.RLock()
+	defer i.mutex.RUnlock()
+
+	if !i.open {
+		return ErrorIndexClosed
+	}
+
+	err := i.isAliasToSingleIndex()
+	if err != nil {
+		return err
+	}
+
+	return i.indexes[0].DeleteInternal(key)
+}
+
+func (i *indexAliasImpl) Advanced() (index.Index, store.KVStore, error) {
+	i.mutex.RLock()
+	defer i.mutex.RUnlock()
+
+	if !i.open {
+		return nil, nil, ErrorIndexClosed
+	}
+
+	err := i.isAliasToSingleIndex()
+	if err != nil {
+		return nil, nil, err
+	}
+
+	return i.indexes[0].Advanced()
+}
+
+func (i *indexAliasImpl) Add(indexes ...Index) {
+	i.mutex.Lock()
+	defer i.mutex.Unlock()
+
+	i.indexes = append(i.indexes, indexes...)
+}
+
+func (i *indexAliasImpl) removeSingle(index Index) {
+	for pos, in := range i.indexes {
+		if in == index {
+			i.indexes = append(i.indexes[:pos], i.indexes[pos+1:]...)
+			break
+		}
+	}
+}
+
+func (i *indexAliasImpl) Remove(indexes ...Index) {
+	i.mutex.Lock()
+	defer i.mutex.Unlock()
+
+	for _, in := range indexes {
+		i.removeSingle(in)
+	}
+}
+
+func (i *indexAliasImpl) Swap(in, out []Index) {
+	i.mutex.Lock()
+	defer i.mutex.Unlock()
+
+	// add
+	i.indexes = append(i.indexes, in...)
+
+	// delete
+	for _, ind := range out {
+		i.removeSingle(ind)
+	}
+}
+
+// createChildSearchRequest creates a separate
+// request from the original
+// For now, avoid data race on req structure.
+// TODO disable highlight/field load on child
+// requests, and add code to do this only on
+// the actual final results.
+// Perhaps that part needs to be optional,
+// could be slower in remote usages.
+func createChildSearchRequest(req *SearchRequest) *SearchRequest {
+	rv := SearchRequest{
+		Query:     req.Query,
+		Size:      req.Size + req.From,
+		From:      0,
+		Highlight: req.Highlight,
+		Fields:    req.Fields,
+		Facets:    req.Facets,
+		Explain:   req.Explain,
+		Sort:      req.Sort,
+	}
+	return &rv
+}
+
+type asyncSearchResult struct {
+	Name   string
+	Result *SearchResult
+	Err    error
+}
+
+// MultiSearch executes a SearchRequest across multiple Index objects,
+// then merges the results.  The indexes must honor any ctx deadline.
+func MultiSearch(ctx context.Context, req *SearchRequest, indexes ...Index) (*SearchResult, error) {
+
+	searchStart := time.Now()
+	asyncResults := make(chan *asyncSearchResult, len(indexes))
+
+	// run search on each index in separate go routine
+	var waitGroup sync.WaitGroup
+
+	var searchChildIndex = func(in Index, childReq *SearchRequest) {
+		rv := asyncSearchResult{Name: in.Name()}
+		rv.Result, rv.Err = in.SearchInContext(ctx, childReq)
+		asyncResults <- &rv
+		waitGroup.Done()
+	}
+
+	waitGroup.Add(len(indexes))
+	for _, in := range indexes {
+		go searchChildIndex(in, createChildSearchRequest(req))
+	}
+
+	// on another go routine, close after finished
+	go func() {
+		waitGroup.Wait()
+		close(asyncResults)
+	}()
+
+	var sr *SearchResult
+	indexErrors := make(map[string]error)
+
+	for asr := range asyncResults {
+		if asr.Err == nil {
+			if sr == nil {
+				// first result
+				sr = asr.Result
+			} else {
+				// merge with previous
+				sr.Merge(asr.Result)
+			}
+		} else {
+			indexErrors[asr.Name] = asr.Err
+		}
+	}
+
+	// merge just concatenated all the hits
+	// now lets clean it up
+
+	// handle case where no results were successful
+	if sr == nil {
+		sr = &SearchResult{
+			Status: &SearchStatus{
+				Errors: make(map[string]error),
+			},
+		}
+	}
+
+	// sort all hits with the requested order
+	if len(req.Sort) > 0 {
+		sorter := newMultiSearchHitSorter(req.Sort, sr.Hits)
+		sort.Sort(sorter)
+	}
+
+	// now skip over the correct From
+	if req.From > 0 && len(sr.Hits) > req.From {
+		sr.Hits = sr.Hits[req.From:]
+	} else if req.From > 0 {
+		sr.Hits = search.DocumentMatchCollection{}
+	}
+
+	// now trim to the correct size
+	if req.Size > 0 && len(sr.Hits) > req.Size {
+		sr.Hits = sr.Hits[0:req.Size]
+	}
+
+	// fix up facets
+	for name, fr := range req.Facets {
+		sr.Facets.Fixup(name, fr.Size)
+	}
+
+	// fix up original request
+	sr.Request = req
+	searchDuration := time.Since(searchStart)
+	sr.Took = searchDuration
+
+	// fix up errors
+	if len(indexErrors) > 0 {
+		if sr.Status.Errors == nil {
+			sr.Status.Errors = make(map[string]error)
+		}
+		for indexName, indexErr := range indexErrors {
+			sr.Status.Errors[indexName] = indexErr
+			sr.Status.Total++
+			sr.Status.Failed++
+		}
+	}
+
+	return sr, nil
+}
+
+func (i *indexAliasImpl) NewBatch() *Batch {
+	i.mutex.RLock()
+	defer i.mutex.RUnlock()
+
+	if !i.open {
+		return nil
+	}
+
+	err := i.isAliasToSingleIndex()
+	if err != nil {
+		return nil
+	}
+
+	return i.indexes[0].NewBatch()
+}
+
+func (i *indexAliasImpl) Name() string {
+	return i.name
+}
+
+func (i *indexAliasImpl) SetName(name string) {
+	i.name = name
+}
+
+type indexAliasImplFieldDict struct {
+	index     *indexAliasImpl
+	fieldDict index.FieldDict
+}
+
+func (f *indexAliasImplFieldDict) Next() (*index.DictEntry, error) {
+	return f.fieldDict.Next()
+}
+
+func (f *indexAliasImplFieldDict) Close() error {
+	defer f.index.mutex.RUnlock()
+	return f.fieldDict.Close()
+}
+
+type multiSearchHitSorter struct {
+	hits          search.DocumentMatchCollection
+	sort          search.SortOrder
+	cachedScoring []bool
+	cachedDesc    []bool
+}
+
+func newMultiSearchHitSorter(sort search.SortOrder, hits search.DocumentMatchCollection) *multiSearchHitSorter {
+	return &multiSearchHitSorter{
+		sort:          sort,
+		hits:          hits,
+		cachedScoring: sort.CacheIsScore(),
+		cachedDesc:    sort.CacheDescending(),
+	}
+}
+
+func (m *multiSearchHitSorter) Len() int      { return len(m.hits) }
+func (m *multiSearchHitSorter) Swap(i, j int) { m.hits[i], m.hits[j] = m.hits[j], m.hits[i] }
+func (m *multiSearchHitSorter) Less(i, j int) bool {
+	c := m.sort.Compare(m.cachedScoring, m.cachedDesc, m.hits[i], m.hits[j])
+	return c < 0
+}

vendor/github.com/blevesearch/bleve/index_impl.go

@@ -0,0 +1,729 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package bleve
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+	"sync"
+	"sync/atomic"
+	"time"
+
+	"golang.org/x/net/context"
+
+	"github.com/blevesearch/bleve/document"
+	"github.com/blevesearch/bleve/index"
+	"github.com/blevesearch/bleve/index/store"
+	"github.com/blevesearch/bleve/index/upsidedown"
+	"github.com/blevesearch/bleve/mapping"
+	"github.com/blevesearch/bleve/registry"
+	"github.com/blevesearch/bleve/search"
+	"github.com/blevesearch/bleve/search/collector"
+	"github.com/blevesearch/bleve/search/facet"
+	"github.com/blevesearch/bleve/search/highlight"
+)
+
+type indexImpl struct {
+	path  string
+	name  string
+	meta  *indexMeta
+	i     index.Index
+	m     mapping.IndexMapping
+	mutex sync.RWMutex
+	open  bool
+	stats *IndexStat
+}
+
+const storePath = "store"
+
+var mappingInternalKey = []byte("_mapping")
+
+func indexStorePath(path string) string {
+	return path + string(os.PathSeparator) + storePath
+}
+
+func newIndexUsing(path string, mapping mapping.IndexMapping, indexType string, kvstore string, kvconfig map[string]interface{}) (*indexImpl, error) {
+	// first validate the mapping
+	err := mapping.Validate()
+	if err != nil {
+		return nil, err
+	}
+
+	if kvconfig == nil {
+		kvconfig = map[string]interface{}{}
+	}
+
+	if kvstore == "" {
+		return nil, fmt.Errorf("bleve not configured for file based indexing")
+	}
+
+	rv := indexImpl{
+		path: path,
+		name: path,
+		m:    mapping,
+		meta: newIndexMeta(indexType, kvstore, kvconfig),
+	}
+	rv.stats = &IndexStat{i: &rv}
+	// at this point there is hope that we can be successful, so save index meta
+	if path != "" {
+		err = rv.meta.Save(path)
+		if err != nil {
+			return nil, err
+		}
+		kvconfig["create_if_missing"] = true
+		kvconfig["error_if_exists"] = true
+		kvconfig["path"] = indexStorePath(path)
+	} else {
+		kvconfig["path"] = ""
+	}
+
+	// open the index
+	indexTypeConstructor := registry.IndexTypeConstructorByName(rv.meta.IndexType)
+	if indexTypeConstructor == nil {
+		return nil, ErrorUnknownIndexType
+	}
+
+	rv.i, err = indexTypeConstructor(rv.meta.Storage, kvconfig, Config.analysisQueue)
+	if err != nil {
+		return nil, err
+	}
+	err = rv.i.Open()
+	if err != nil {
+		if err == index.ErrorUnknownStorageType {
+			return nil, ErrorUnknownStorageType
+		}
+		return nil, err
+	}
+
+	// now persist the mapping
+	mappingBytes, err := json.Marshal(mapping)
+	if err != nil {
+		return nil, err
+	}
+	err = rv.i.SetInternal(mappingInternalKey, mappingBytes)
+	if err != nil {
+		return nil, err
+	}
+
+	// mark the index as open
+	rv.mutex.Lock()
+	defer rv.mutex.Unlock()
+	rv.open = true
+	indexStats.Register(&rv)
+	return &rv, nil
+}
+
+func openIndexUsing(path string, runtimeConfig map[string]interface{}) (rv *indexImpl, err error) {
+	rv = &indexImpl{
+		path: path,
+		name: path,
+	}
+	rv.stats = &IndexStat{i: rv}
+
+	rv.meta, err = openIndexMeta(path)
+	if err != nil {
+		return nil, err
+	}
+
+	// backwards compatibility if index type is missing
+	if rv.meta.IndexType == "" {
+		rv.meta.IndexType = upsidedown.Name
+	}
+
+	storeConfig := rv.meta.Config
+	if storeConfig == nil {
+		storeConfig = map[string]interface{}{}
+	}
+
+	storeConfig["path"] = indexStorePath(path)
+	storeConfig["create_if_missing"] = false
+	storeConfig["error_if_exists"] = false
+	for rck, rcv := range runtimeConfig {
+		storeConfig[rck] = rcv
+	}
+
+	// open the index
+	indexTypeConstructor := registry.IndexTypeConstructorByName(rv.meta.IndexType)
+	if indexTypeConstructor == nil {
+		return nil, ErrorUnknownIndexType
+	}
+
+	rv.i, err = indexTypeConstructor(rv.meta.Storage, storeConfig, Config.analysisQueue)
+	if err != nil {
+		return nil, err
+	}
+	err = rv.i.Open()
+	if err != nil {
+		if err == index.ErrorUnknownStorageType {
+			return nil, ErrorUnknownStorageType
+		}
+		return nil, err
+	}
+
+	// now load the mapping
+	indexReader, err := rv.i.Reader()
+	if err != nil {
+		return nil, err
+	}
+	defer func() {
+		if cerr := indexReader.Close(); cerr != nil && err == nil {
+			err = cerr
+		}
+	}()
+
+	mappingBytes, err := indexReader.GetInternal(mappingInternalKey)
+	if err != nil {
+		return nil, err
+	}
+
+	var im *mapping.IndexMappingImpl
+	err = json.Unmarshal(mappingBytes, &im)
+	if err != nil {
+		return nil, fmt.Errorf("error parsing mapping JSON: %v\nmapping contents:\n%s", err, string(mappingBytes))
+	}
+
+	// mark the index as open
+	rv.mutex.Lock()
+	defer rv.mutex.Unlock()
+	rv.open = true
+
+	// validate the mapping
+	err = im.Validate()
+	if err != nil {
+		// note even if the mapping is invalid
+		// we still return an open usable index
+		return rv, err
+	}
+
+	rv.m = im
+	indexStats.Register(rv)
+	return rv, err
+}
+
+// Advanced returns implementation internals
+// necessary ONLY for advanced usage.
+func (i *indexImpl) Advanced() (index.Index, store.KVStore, error) {
+	s, err := i.i.Advanced()
+	if err != nil {
+		return nil, nil, err
+	}
+	return i.i, s, nil
+}
+
+// Mapping returns the IndexMapping in use by this
+// Index.
+func (i *indexImpl) Mapping() mapping.IndexMapping {
+	return i.m
+}
+
+// Index the object with the specified identifier.
+// The IndexMapping for this index will determine
+// how the object is indexed.
+func (i *indexImpl) Index(id string, data interface{}) (err error) {
+	if id == "" {
+		return ErrorEmptyID
+	}
+
+	i.mutex.RLock()
+	defer i.mutex.RUnlock()
+
+	if !i.open {
+		return ErrorIndexClosed
+	}
+
+	doc := document.NewDocument(id)
+	err = i.m.MapDocument(doc, data)
+	if err != nil {
+		return
+	}
+	err = i.i.Update(doc)
+	return
+}
+
+// Delete entries for the specified identifier from
+// the index.
+func (i *indexImpl) Delete(id string) (err error) {
+	if id == "" {
+		return ErrorEmptyID
+	}
+
+	i.mutex.RLock()
+	defer i.mutex.RUnlock()
+
+	if !i.open {
+		return ErrorIndexClosed
+	}
+
+	err = i.i.Delete(id)
+	return
+}
+
+// Batch executes multiple Index and Delete
+// operations at the same time.  There are often
+// significant performance benefits when performing
+// operations in a batch.
+func (i *indexImpl) Batch(b *Batch) error {
+	i.mutex.RLock()
+	defer i.mutex.RUnlock()
+
+	if !i.open {
+		return ErrorIndexClosed
+	}
+
+	return i.i.Batch(b.internal)
+}
+
+// Document is used to find the values of all the
+// stored fields for a document in the index.  These
+// stored fields are put back into a Document object
+// and returned.
+func (i *indexImpl) Document(id string) (doc *document.Document, err error) {
+	i.mutex.RLock()
+	defer i.mutex.RUnlock()
+
+	if !i.open {
+		return nil, ErrorIndexClosed
+	}
+	indexReader, err := i.i.Reader()
+	if err != nil {
+		return nil, err
+	}
+	defer func() {
+		if cerr := indexReader.Close(); err == nil && cerr != nil {
+			err = cerr
+		}
+	}()
+
+	doc, err = indexReader.Document(id)
+	if err != nil {
+		return nil, err
+	}
+	return doc, nil
+}
+
+// DocCount returns the number of documents in the
+// index.
+func (i *indexImpl) DocCount() (count uint64, err error) {
+	i.mutex.RLock()
+	defer i.mutex.RUnlock()
+
+	if !i.open {
+		return 0, ErrorIndexClosed
+	}
+
+	// open a reader for this search
+	indexReader, err := i.i.Reader()
+	if err != nil {
+		return 0, fmt.Errorf("error opening index reader %v", err)
+	}
+	defer func() {
+		if cerr := indexReader.Close(); err == nil && cerr != nil {
+			err = cerr
+		}
+	}()
+
+	count, err = indexReader.DocCount()
+	return
+}
+
+// Search executes a search request operation.
+// Returns a SearchResult object or an error.
+func (i *indexImpl) Search(req *SearchRequest) (sr *SearchResult, err error) {
+	return i.SearchInContext(context.Background(), req)
+}
+
+// SearchInContext executes a search request operation within the provided
+// Context.  Returns a SearchResult object or an error.
+func (i *indexImpl) SearchInContext(ctx context.Context, req *SearchRequest) (sr *SearchResult, err error) {
+	i.mutex.RLock()
+	defer i.mutex.RUnlock()
+
+	searchStart := time.Now()
+
+	if !i.open {
+		return nil, ErrorIndexClosed
+	}
+
+	collector := collector.NewTopNCollector(req.Size, req.From, req.Sort)
+
+	// open a reader for this search
+	indexReader, err := i.i.Reader()
+	if err != nil {
+		return nil, fmt.Errorf("error opening index reader %v", err)
+	}
+	defer func() {
+		if cerr := indexReader.Close(); err == nil && cerr != nil {
+			err = cerr
+		}
+	}()
+
+	searcher, err := req.Query.Searcher(indexReader, i.m, req.Explain)
+	if err != nil {
+		return nil, err
+	}
+	defer func() {
+		if serr := searcher.Close(); err == nil && serr != nil {
+			err = serr
+		}
+	}()
+
+	if req.Facets != nil {
+		facetsBuilder := search.NewFacetsBuilder(indexReader)
+		for facetName, facetRequest := range req.Facets {
+			if facetRequest.NumericRanges != nil {
+				// build numeric range facet
+				facetBuilder := facet.NewNumericFacetBuilder(facetRequest.Field, facetRequest.Size)
+				for _, nr := range facetRequest.NumericRanges {
+					facetBuilder.AddRange(nr.Name, nr.Min, nr.Max)
+				}
+				facetsBuilder.Add(facetName, facetBuilder)
+			} else if facetRequest.DateTimeRanges != nil {
+				// build date range facet
+				facetBuilder := facet.NewDateTimeFacetBuilder(facetRequest.Field, facetRequest.Size)
+				dateTimeParser := i.m.DateTimeParserNamed("")
+				for _, dr := range facetRequest.DateTimeRanges {
+					start, end := dr.ParseDates(dateTimeParser)
+					facetBuilder.AddRange(dr.Name, start, end)
+				}
+				facetsBuilder.Add(facetName, facetBuilder)
+			} else {
+				// build terms facet
+				facetBuilder := facet.NewTermsFacetBuilder(facetRequest.Field, facetRequest.Size)
+				facetsBuilder.Add(facetName, facetBuilder)
+			}
+		}
+		collector.SetFacetsBuilder(facetsBuilder)
+	}
+
+	err = collector.Collect(ctx, searcher, indexReader)
+	if err != nil {
+		return nil, err
+	}
+
+	hits := collector.Results()
+
+	var highlighter highlight.Highlighter
+
+	if req.Highlight != nil {
+		// get the right highlighter
+		highlighter, err = Config.Cache.HighlighterNamed(Config.DefaultHighlighter)
+		if err != nil {
+			return nil, err
+		}
+		if req.Highlight.Style != nil {
+			highlighter, err = Config.Cache.HighlighterNamed(*req.Highlight.Style)
+			if err != nil {
+				return nil, err
+			}
+		}
+		if highlighter == nil {
+			return nil, fmt.Errorf("no highlighter named `%s` registered", *req.Highlight.Style)
+		}
+	}
+
+	for _, hit := range hits {
+		if len(req.Fields) > 0 || highlighter != nil {
+			doc, err := indexReader.Document(hit.ID)
+			if err == nil && doc != nil {
+				if len(req.Fields) > 0 {
+					for _, f := range req.Fields {
+						for _, docF := range doc.Fields {
+							if f == "*" || docF.Name() == f {
+								var value interface{}
+								switch docF := docF.(type) {
+								case *document.TextField:
+									value = string(docF.Value())
+								case *document.NumericField:
+									num, err := docF.Number()
+									if err == nil {
+										value = num
+									}
+								case *document.DateTimeField:
+									datetime, err := docF.DateTime()
+									if err == nil {
+										value = datetime.Format(time.RFC3339)
+									}
+								case *document.BooleanField:
+									boolean, err := docF.Boolean()
+									if err == nil {
+										value = boolean
+									}
+								}
+								if value != nil {
+									hit.AddFieldValue(docF.Name(), value)
+								}
+							}
+						}
+					}
+				}
+				if highlighter != nil {
+					highlightFields := req.Highlight.Fields
+					if highlightFields == nil {
+						// add all fields with matches
+						highlightFields = make([]string, 0, len(hit.Locations))
+						for k := range hit.Locations {
+							highlightFields = append(highlightFields, k)
+						}
+					}
+					for _, hf := range highlightFields {
+						highlighter.BestFragmentsInField(hit, doc, hf, 1)
+					}
+				}
+			} else if doc == nil {
+				// unexpected case, a doc ID that was found as a search hit
+				// was unable to be found during document lookup
+				return nil, ErrorIndexReadInconsistency
+			}
+		}
+		if i.name != "" {
+			hit.Index = i.name
+		}
+	}
+
+	atomic.AddUint64(&i.stats.searches, 1)
+	searchDuration := time.Since(searchStart)
+	atomic.AddUint64(&i.stats.searchTime, uint64(searchDuration))
+
+	if Config.SlowSearchLogThreshold > 0 &&
+		searchDuration > Config.SlowSearchLogThreshold {
+		logger.Printf("slow search took %s - %v", searchDuration, req)
+	}
+
+	return &SearchResult{
+		Status: &SearchStatus{
+			Total:      1,
+			Failed:     0,
+			Successful: 1,
+			Errors:     make(map[string]error),
+		},
+		Request:  req,
+		Hits:     hits,
+		Total:    collector.Total(),
+		MaxScore: collector.MaxScore(),
+		Took:     searchDuration,
+		Facets:   collector.FacetResults(),
+	}, nil
+}
+
+// Fields returns the name of all the fields this
+// Index has operated on.
+func (i *indexImpl) Fields() (fields []string, err error) {
+	i.mutex.RLock()
+	defer i.mutex.RUnlock()
+
+	if !i.open {
+		return nil, ErrorIndexClosed
+	}
+
+	indexReader, err := i.i.Reader()
+	if err != nil {
+		return nil, err
+	}
+	defer func() {
+		if cerr := indexReader.Close(); err == nil && cerr != nil {
+			err = cerr
+		}
+	}()
+
+	fields, err = indexReader.Fields()
+	if err != nil {
+		return nil, err
+	}
+	return fields, nil
+}
+
+func (i *indexImpl) FieldDict(field string) (index.FieldDict, error) {
+	i.mutex.RLock()
+
+	if !i.open {
+		i.mutex.RUnlock()
+		return nil, ErrorIndexClosed
+	}
+
+	indexReader, err := i.i.Reader()
+	if err != nil {
+		i.mutex.RUnlock()
+		return nil, err
+	}
+
+	fieldDict, err := indexReader.FieldDict(field)
+	if err != nil {
+		i.mutex.RUnlock()
+		return nil, err
+	}
+
+	return &indexImplFieldDict{
+		index:       i,
+		indexReader: indexReader,
+		fieldDict:   fieldDict,
+	}, nil
+}
+
+func (i *indexImpl) FieldDictRange(field string, startTerm []byte, endTerm []byte) (index.FieldDict, error) {
+	i.mutex.RLock()
+
+	if !i.open {
+		i.mutex.RUnlock()
+		return nil, ErrorIndexClosed
+	}
+
+	indexReader, err := i.i.Reader()
+	if err != nil {
+		i.mutex.RUnlock()
+		return nil, err
+	}
+
+	fieldDict, err := indexReader.FieldDictRange(field, startTerm, endTerm)
+	if err != nil {
+		i.mutex.RUnlock()
+		return nil, err
+	}
+
+	return &indexImplFieldDict{
+		index:       i,
+		indexReader: indexReader,
+		fieldDict:   fieldDict,
+	}, nil
+}
+
+func (i *indexImpl) FieldDictPrefix(field string, termPrefix []byte) (index.FieldDict, error) {
+	i.mutex.RLock()
+
+	if !i.open {
+		i.mutex.RUnlock()
+		return nil, ErrorIndexClosed
+	}
+
+	indexReader, err := i.i.Reader()
+	if err != nil {
+		i.mutex.RUnlock()
+		return nil, err
+	}
+
+	fieldDict, err := indexReader.FieldDictPrefix(field, termPrefix)
+	if err != nil {
+		i.mutex.RUnlock()
+		return nil, err
+	}
+
+	return &indexImplFieldDict{
+		index:       i,
+		indexReader: indexReader,
+		fieldDict:   fieldDict,
+	}, nil
+}
+
+func (i *indexImpl) Close() error {
+	i.mutex.Lock()
+	defer i.mutex.Unlock()
+
+	indexStats.UnRegister(i)
+
+	i.open = false
+	return i.i.Close()
+}
+
+func (i *indexImpl) Stats() *IndexStat {
+	return i.stats
+}
+
+func (i *indexImpl) StatsMap() map[string]interface{} {
+	return i.stats.statsMap()
+}
+
+func (i *indexImpl) GetInternal(key []byte) (val []byte, err error) {
+	i.mutex.RLock()
+	defer i.mutex.RUnlock()
+
+	if !i.open {
+		return nil, ErrorIndexClosed
+	}
+
+	reader, err := i.i.Reader()
+	if err != nil {
+		return nil, err
+	}
+	defer func() {
+		if cerr := reader.Close(); err == nil && cerr != nil {
+			err = cerr
+		}
+	}()
+
+	val, err = reader.GetInternal(key)
+	if err != nil {
+		return nil, err
+	}
+	return val, nil
+}
+
+func (i *indexImpl) SetInternal(key, val []byte) error {
+	i.mutex.RLock()
+	defer i.mutex.RUnlock()
+
+	if !i.open {
+		return ErrorIndexClosed
+	}
+
+	return i.i.SetInternal(key, val)
+}
+
+func (i *indexImpl) DeleteInternal(key []byte) error {
+	i.mutex.RLock()
+	defer i.mutex.RUnlock()
+
+	if !i.open {
+		return ErrorIndexClosed
+	}
+
+	return i.i.DeleteInternal(key)
+}
+
+// NewBatch creates a new empty batch.
+func (i *indexImpl) NewBatch() *Batch {
+	return &Batch{
+		index:    i,
+		internal: index.NewBatch(),
+	}
+}
+
+func (i *indexImpl) Name() string {
+	return i.name
+}
+
+func (i *indexImpl) SetName(name string) {
+	indexStats.UnRegister(i)
+	i.name = name
+	indexStats.Register(i)
+}
+
+type indexImplFieldDict struct {
+	index       *indexImpl
+	indexReader index.IndexReader
+	fieldDict   index.FieldDict
+}
+
+func (f *indexImplFieldDict) Next() (*index.DictEntry, error) {
+	return f.fieldDict.Next()
+}
+
+func (f *indexImplFieldDict) Close() error {
+	defer f.index.mutex.RUnlock()
+	err := f.fieldDict.Close()
+	if err != nil {
+		return err
+	}
+	return f.indexReader.Close()
+}

vendor/github.com/blevesearch/bleve/index_meta.go

@@ -0,0 +1,96 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package bleve
+
+import (
+	"encoding/json"
+	"io/ioutil"
+	"os"
+
+	"github.com/blevesearch/bleve/index/upsidedown"
+)
+
+const metaFilename = "index_meta.json"
+
+type indexMeta struct {
+	Storage   string                 `json:"storage"`
+	IndexType string                 `json:"index_type"`
+	Config    map[string]interface{} `json:"config,omitempty"`
+}
+
+func newIndexMeta(indexType string, storage string, config map[string]interface{}) *indexMeta {
+	return &indexMeta{
+		IndexType: indexType,
+		Storage:   storage,
+		Config:    config,
+	}
+}
+
+func openIndexMeta(path string) (*indexMeta, error) {
+	if _, err := os.Stat(path); os.IsNotExist(err) {
+		return nil, ErrorIndexPathDoesNotExist
+	}
+	indexMetaPath := indexMetaPath(path)
+	metaBytes, err := ioutil.ReadFile(indexMetaPath)
+	if err != nil {
+		return nil, ErrorIndexMetaMissing
+	}
+	var im indexMeta
+	err = json.Unmarshal(metaBytes, &im)
+	if err != nil {
+		return nil, ErrorIndexMetaCorrupt
+	}
+	if im.IndexType == "" {
+		im.IndexType = upsidedown.Name
+	}
+	return &im, nil
+}
+
+func (i *indexMeta) Save(path string) (err error) {
+	indexMetaPath := indexMetaPath(path)
+	// ensure any necessary parent directories exist
+	err = os.MkdirAll(path, 0700)
+	if err != nil {
+		if os.IsExist(err) {
+			return ErrorIndexPathExists
+		}
+		return err
+	}
+	metaBytes, err := json.Marshal(i)
+	if err != nil {
+		return err
+	}
+	indexMetaFile, err := os.OpenFile(indexMetaPath, os.O_RDWR|os.O_CREATE|os.O_EXCL, 0666)
+	if err != nil {
+		if os.IsExist(err) {
+			return ErrorIndexPathExists
+		}
+		return err
+	}
+	defer func() {
+		if ierr := indexMetaFile.Close(); err == nil && ierr != nil {
+			err = ierr
+		}
+	}()
+	_, err = indexMetaFile.Write(metaBytes)
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+func indexMetaPath(path string) string {
+	return path + string(os.PathSeparator) + metaFilename
+}

vendor/github.com/blevesearch/bleve/index_stats.go

@@ -0,0 +1,75 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package bleve
+
+import (
+	"encoding/json"
+	"sync"
+	"sync/atomic"
+)
+
+type IndexStat struct {
+	searches   uint64
+	searchTime uint64
+	i          *indexImpl
+}
+
+func (is *IndexStat) statsMap() map[string]interface{} {
+	m := map[string]interface{}{}
+	m["index"] = is.i.i.StatsMap()
+	m["searches"] = atomic.LoadUint64(&is.searches)
+	m["search_time"] = atomic.LoadUint64(&is.searchTime)
+	return m
+}
+
+func (is *IndexStat) MarshalJSON() ([]byte, error) {
+	m := is.statsMap()
+	return json.Marshal(m)
+}
+
+type IndexStats struct {
+	indexes map[string]*IndexStat
+	mutex   sync.RWMutex
+}
+
+func NewIndexStats() *IndexStats {
+	return &IndexStats{
+		indexes: make(map[string]*IndexStat),
+	}
+}
+
+func (i *IndexStats) Register(index Index) {
+	i.mutex.Lock()
+	defer i.mutex.Unlock()
+	i.indexes[index.Name()] = index.Stats()
+}
+
+func (i *IndexStats) UnRegister(index Index) {
+	i.mutex.Lock()
+	defer i.mutex.Unlock()
+	delete(i.indexes, index.Name())
+}
+
+func (i *IndexStats) String() string {
+	i.mutex.RLock()
+	defer i.mutex.RUnlock()
+	bytes, err := json.Marshal(i.indexes)
+	if err != nil {
+		return "error marshaling stats"
+	}
+	return string(bytes)
+}
+
+var indexStats *IndexStats

vendor/github.com/blevesearch/bleve/mapping.go

@@ -0,0 +1,61 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package bleve
+
+import "github.com/blevesearch/bleve/mapping"
+
+// NewIndexMapping creates a new IndexMapping that will use all the default indexing rules
+func NewIndexMapping() *mapping.IndexMappingImpl {
+	return mapping.NewIndexMapping()
+}
+
+// NewDocumentMapping returns a new document mapping
+// with all the default values.
+func NewDocumentMapping() *mapping.DocumentMapping {
+	return mapping.NewDocumentMapping()
+}
+
+// NewDocumentStaticMapping returns a new document
+// mapping that will not automatically index parts
+// of a document without an explicit mapping.
+func NewDocumentStaticMapping() *mapping.DocumentMapping {
+	return mapping.NewDocumentStaticMapping()
+}
+
+// NewDocumentDisabledMapping returns a new document
+// mapping that will not perform any indexing.
+func NewDocumentDisabledMapping() *mapping.DocumentMapping {
+	return mapping.NewDocumentDisabledMapping()
+}
+
+// NewTextFieldMapping returns a default field mapping for text
+func NewTextFieldMapping() *mapping.FieldMapping {
+	return mapping.NewTextFieldMapping()
+}
+
+// NewNumericFieldMapping returns a default field mapping for numbers
+func NewNumericFieldMapping() *mapping.FieldMapping {
+	return mapping.NewNumericFieldMapping()
+}
+
+// NewDateTimeFieldMapping returns a default field mapping for dates
+func NewDateTimeFieldMapping() *mapping.FieldMapping {
+	return mapping.NewDateTimeFieldMapping()
+}
+
+// NewBooleanFieldMapping returns a default field mapping for booleans
+func NewBooleanFieldMapping() *mapping.FieldMapping {
+	return mapping.NewBooleanFieldMapping()
+}

vendor/github.com/blevesearch/bleve/mapping/analysis.go

@@ -0,0 +1,99 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package mapping
+
+type customAnalysis struct {
+	CharFilters     map[string]map[string]interface{} `json:"char_filters,omitempty"`
+	Tokenizers      map[string]map[string]interface{} `json:"tokenizers,omitempty"`
+	TokenMaps       map[string]map[string]interface{} `json:"token_maps,omitempty"`
+	TokenFilters    map[string]map[string]interface{} `json:"token_filters,omitempty"`
+	Analyzers       map[string]map[string]interface{} `json:"analyzers,omitempty"`
+	DateTimeParsers map[string]map[string]interface{} `json:"date_time_parsers,omitempty"`
+}
+
+func (c *customAnalysis) registerAll(i *IndexMappingImpl) error {
+	for name, config := range c.CharFilters {
+		_, err := i.cache.DefineCharFilter(name, config)
+		if err != nil {
+			return err
+		}
+	}
+
+	if len(c.Tokenizers) > 0 {
+		// put all the names in map tracking work to do
+		todo := map[string]struct{}{}
+		for name := range c.Tokenizers {
+			todo[name] = struct{}{}
+		}
+		registered := 1
+		errs := []error{}
+		// as long as we keep making progress, keep going
+		for len(todo) > 0 && registered > 0 {
+			registered = 0
+			errs = []error{}
+			for name := range todo {
+				config := c.Tokenizers[name]
+				_, err := i.cache.DefineTokenizer(name, config)
+				if err != nil {
+					errs = append(errs, err)
+				} else {
+					delete(todo, name)
+					registered++
+				}
+			}
+		}
+
+		if len(errs) > 0 {
+			return errs[0]
+		}
+	}
+	for name, config := range c.TokenMaps {
+		_, err := i.cache.DefineTokenMap(name, config)
+		if err != nil {
+			return err
+		}
+	}
+	for name, config := range c.TokenFilters {
+		_, err := i.cache.DefineTokenFilter(name, config)
+		if err != nil {
+			return err
+		}
+	}
+	for name, config := range c.Analyzers {
+		_, err := i.cache.DefineAnalyzer(name, config)
+		if err != nil {
+			return err
+		}
+	}
+	for name, config := range c.DateTimeParsers {
+		_, err := i.cache.DefineDateTimeParser(name, config)
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func newCustomAnalysis() *customAnalysis {
+	rv := customAnalysis{
+		CharFilters:     make(map[string]map[string]interface{}),
+		Tokenizers:      make(map[string]map[string]interface{}),
+		TokenMaps:       make(map[string]map[string]interface{}),
+		TokenFilters:    make(map[string]map[string]interface{}),
+		Analyzers:       make(map[string]map[string]interface{}),
+		DateTimeParsers: make(map[string]map[string]interface{}),
+	}
+	return &rv
+}

vendor/github.com/blevesearch/bleve/mapping/document.go

@@ -0,0 +1,490 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package mapping
+
+import (
+	"encoding/json"
+	"fmt"
+	"reflect"
+	"time"
+
+	"github.com/blevesearch/bleve/registry"
+)
+
+// A DocumentMapping describes how a type of document
+// should be indexed.
+// As documents can be hierarchical, named sub-sections
+// of documents are mapped using the same structure in
+// the Properties field.
+// Each value inside a document can be indexed 0 or more
+// ways.  These index entries are called fields and
+// are stored in the Fields field.
+// Entire sections of a document can be ignored or
+// excluded by setting Enabled to false.
+// If not explicitly mapped, default mapping operations
+// are used.  To disable this automatic handling, set
+// Dynamic to false.
+type DocumentMapping struct {
+	Enabled         bool                        `json:"enabled"`
+	Dynamic         bool                        `json:"dynamic"`
+	Properties      map[string]*DocumentMapping `json:"properties,omitempty"`
+	Fields          []*FieldMapping             `json:"fields,omitempty"`
+	DefaultAnalyzer string                      `json:"default_analyzer"`
+
+	// StructTagKey overrides "json" when looking for field names in struct tags
+	StructTagKey string `json:"struct_tag_key,omitempty"`
+}
+
+func (dm *DocumentMapping) Validate(cache *registry.Cache) error {
+	var err error
+	if dm.DefaultAnalyzer != "" {
+		_, err := cache.AnalyzerNamed(dm.DefaultAnalyzer)
+		if err != nil {
+			return err
+		}
+	}
+	for _, property := range dm.Properties {
+		err = property.Validate(cache)
+		if err != nil {
+			return err
+		}
+	}
+	for _, field := range dm.Fields {
+		if field.Analyzer != "" {
+			_, err = cache.AnalyzerNamed(field.Analyzer)
+			if err != nil {
+				return err
+			}
+		}
+		if field.DateFormat != "" {
+			_, err = cache.DateTimeParserNamed(field.DateFormat)
+			if err != nil {
+				return err
+			}
+		}
+		switch field.Type {
+		case "text", "datetime", "number", "boolean":
+		default:
+			return fmt.Errorf("unknown field type: '%s'", field.Type)
+		}
+	}
+	return nil
+}
+
+// analyzerNameForPath attempts to first find the field
+// described by this path, then returns the analyzer
+// configured for that field
+func (dm *DocumentMapping) analyzerNameForPath(path string) string {
+	field := dm.fieldDescribedByPath(path)
+	if field != nil {
+		return field.Analyzer
+	}
+	return ""
+}
+
+func (dm *DocumentMapping) fieldDescribedByPath(path string) *FieldMapping {
+	pathElements := decodePath(path)
+	if len(pathElements) > 1 {
+		// easy case, there is more than 1 path element remaining
+		// the next path element must match a property name
+		// at this level
+		for propName, subDocMapping := range dm.Properties {
+			if propName == pathElements[0] {
+				return subDocMapping.fieldDescribedByPath(encodePath(pathElements[1:]))
+			}
+		}
+	} else {
+		// just 1 path elememnt
+		// first look for property name with empty field
+		for propName, subDocMapping := range dm.Properties {
+			if propName == pathElements[0] {
+				// found property name match, now look at its fields
+				for _, field := range subDocMapping.Fields {
+					if field.Name == "" || field.Name == pathElements[0] {
+						// match
+						return field
+					}
+				}
+			}
+		}
+		// next, walk the properties again, looking for field overriding the name
+		for propName, subDocMapping := range dm.Properties {
+			if propName != pathElements[0] {
+				// property name isn't a match, but field name could override it
+				for _, field := range subDocMapping.Fields {
+					if field.Name == pathElements[0] {
+						return field
+					}
+				}
+			}
+		}
+	}
+
+	return nil
+}
+
+// documentMappingForPath only returns EXACT matches for a sub document
+// or for an explicitly mapped field, if you want to find the
+// closest document mapping to a field not explicitly mapped
+// use closestDocMapping
+func (dm *DocumentMapping) documentMappingForPath(path string) *DocumentMapping {
+	pathElements := decodePath(path)
+	current := dm
+OUTER:
+	for i, pathElement := range pathElements {
+		for name, subDocMapping := range current.Properties {
+			if name == pathElement {
+				current = subDocMapping
+				continue OUTER
+			}
+		}
+		// no subDocMapping matches this pathElement
+		// only if this is the last element check for field name
+		if i == len(pathElements)-1 {
+			for _, field := range current.Fields {
+				if field.Name == pathElement {
+					break
+				}
+			}
+		}
+
+		return nil
+	}
+	return current
+}
+
+// closestDocMapping findest the most specific document mapping that matches
+// part of the provided path
+func (dm *DocumentMapping) closestDocMapping(path string) *DocumentMapping {
+	pathElements := decodePath(path)
+	current := dm
+OUTER:
+	for _, pathElement := range pathElements {
+		for name, subDocMapping := range current.Properties {
+			if name == pathElement {
+				current = subDocMapping
+				continue OUTER
+			}
+		}
+	}
+	return current
+}
+
+// NewDocumentMapping returns a new document mapping
+// with all the default values.
+func NewDocumentMapping() *DocumentMapping {
+	return &DocumentMapping{
+		Enabled: true,
+		Dynamic: true,
+	}
+}
+
+// NewDocumentStaticMapping returns a new document
+// mapping that will not automatically index parts
+// of a document without an explicit mapping.
+func NewDocumentStaticMapping() *DocumentMapping {
+	return &DocumentMapping{
+		Enabled: true,
+	}
+}
+
+// NewDocumentDisabledMapping returns a new document
+// mapping that will not perform any indexing.
+func NewDocumentDisabledMapping() *DocumentMapping {
+	return &DocumentMapping{}
+}
+
+// AddSubDocumentMapping adds the provided DocumentMapping as a sub-mapping
+// for the specified named subsection.
+func (dm *DocumentMapping) AddSubDocumentMapping(property string, sdm *DocumentMapping) {
+	if dm.Properties == nil {
+		dm.Properties = make(map[string]*DocumentMapping)
+	}
+	dm.Properties[property] = sdm
+}
+
+// AddFieldMappingsAt adds one or more FieldMappings
+// at the named sub-document.  If the named sub-document
+// doesn't yet exist it is created for you.
+// This is a convenience function to make most common
+// mappings more concise.
+// Otherwise, you would:
+//     subMapping := NewDocumentMapping()
+//     subMapping.AddFieldMapping(fieldMapping)
+//     parentMapping.AddSubDocumentMapping(property, subMapping)
+func (dm *DocumentMapping) AddFieldMappingsAt(property string, fms ...*FieldMapping) {
+	if dm.Properties == nil {
+		dm.Properties = make(map[string]*DocumentMapping)
+	}
+	sdm, ok := dm.Properties[property]
+	if !ok {
+		sdm = NewDocumentMapping()
+	}
+	for _, fm := range fms {
+		sdm.AddFieldMapping(fm)
+	}
+	dm.Properties[property] = sdm
+}
+
+// AddFieldMapping adds the provided FieldMapping for this section
+// of the document.
+func (dm *DocumentMapping) AddFieldMapping(fm *FieldMapping) {
+	if dm.Fields == nil {
+		dm.Fields = make([]*FieldMapping, 0)
+	}
+	dm.Fields = append(dm.Fields, fm)
+}
+
+// UnmarshalJSON offers custom unmarshaling with optional strict validation
+func (dm *DocumentMapping) UnmarshalJSON(data []byte) error {
+
+	var tmp map[string]json.RawMessage
+	err := json.Unmarshal(data, &tmp)
+	if err != nil {
+		return err
+	}
+
+	// set defaults for fields which might have been omitted
+	dm.Enabled = true
+	dm.Dynamic = true
+
+	var invalidKeys []string
+	for k, v := range tmp {
+		switch k {
+		case "enabled":
+			err := json.Unmarshal(v, &dm.Enabled)
+			if err != nil {
+				return err
+			}
+		case "dynamic":
+			err := json.Unmarshal(v, &dm.Dynamic)
+			if err != nil {
+				return err
+			}
+		case "default_analyzer":
+			err := json.Unmarshal(v, &dm.DefaultAnalyzer)
+			if err != nil {
+				return err
+			}
+		case "properties":
+			err := json.Unmarshal(v, &dm.Properties)
+			if err != nil {
+				return err
+			}
+		case "fields":
+			err := json.Unmarshal(v, &dm.Fields)
+			if err != nil {
+				return err
+			}
+		case "struct_tag_key":
+			err := json.Unmarshal(v, &dm.StructTagKey)
+			if err != nil {
+				return err
+			}
+		default:
+			invalidKeys = append(invalidKeys, k)
+		}
+	}
+
+	if MappingJSONStrict && len(invalidKeys) > 0 {
+		return fmt.Errorf("document mapping contains invalid keys: %v", invalidKeys)
+	}
+
+	return nil
+}
+
+func (dm *DocumentMapping) defaultAnalyzerName(path []string) string {
+	rv := ""
+	current := dm
+	for _, pathElement := range path {
+		var ok bool
+		current, ok = current.Properties[pathElement]
+		if !ok {
+			break
+		}
+		if current.DefaultAnalyzer != "" {
+			rv = current.DefaultAnalyzer
+		}
+	}
+	return rv
+}
+
+func (dm *DocumentMapping) walkDocument(data interface{}, path []string, indexes []uint64, context *walkContext) {
+	// allow default "json" tag to be overriden
+	structTagKey := dm.StructTagKey
+	if structTagKey == "" {
+		structTagKey = "json"
+	}
+
+	val := reflect.ValueOf(data)
+	typ := val.Type()
+	switch typ.Kind() {
+	case reflect.Map:
+		// FIXME can add support for other map keys in the future
+		if typ.Key().Kind() == reflect.String {
+			for _, key := range val.MapKeys() {
+				fieldName := key.String()
+				fieldVal := val.MapIndex(key).Interface()
+				dm.processProperty(fieldVal, append(path, fieldName), indexes, context)
+			}
+		}
+	case reflect.Struct:
+		for i := 0; i < val.NumField(); i++ {
+			field := typ.Field(i)
+			fieldName := field.Name
+			// anonymous fields of type struct can elide the type name
+			if field.Anonymous && field.Type.Kind() == reflect.Struct {
+				fieldName = ""
+			}
+
+			// if the field has a name under the specified tag, prefer that
+			tag := field.Tag.Get(structTagKey)
+			tagFieldName := parseTagName(tag)
+			if tagFieldName == "-" {
+				continue
+			}
+			// allow tag to set field name to empty, only if anonymous
+			if field.Tag != "" && (tagFieldName != "" || field.Anonymous) {
+				fieldName = tagFieldName
+			}
+
+			if val.Field(i).CanInterface() {
+				fieldVal := val.Field(i).Interface()
+				newpath := path
+				if fieldName != "" {
+					newpath = append(path, fieldName)
+				}
+				dm.processProperty(fieldVal, newpath, indexes, context)
+			}
+		}
+	case reflect.Slice, reflect.Array:
+		for i := 0; i < val.Len(); i++ {
+			if val.Index(i).CanInterface() {
+				fieldVal := val.Index(i).Interface()
+				dm.processProperty(fieldVal, path, append(indexes, uint64(i)), context)
+			}
+		}
+	case reflect.Ptr:
+		ptrElem := val.Elem()
+		if ptrElem.IsValid() && ptrElem.CanInterface() {
+			dm.processProperty(ptrElem.Interface(), path, indexes, context)
+		}
+	case reflect.String:
+		dm.processProperty(val.String(), path, indexes, context)
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		dm.processProperty(float64(val.Int()), path, indexes, context)
+	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
+		dm.processProperty(float64(val.Uint()), path, indexes, context)
+	case reflect.Float32, reflect.Float64:
+		dm.processProperty(float64(val.Float()), path, indexes, context)
+	case reflect.Bool:
+		dm.processProperty(val.Bool(), path, indexes, context)
+	}
+
+}
+
+func (dm *DocumentMapping) processProperty(property interface{}, path []string, indexes []uint64, context *walkContext) {
+	pathString := encodePath(path)
+	// look to see if there is a mapping for this field
+	subDocMapping := dm.documentMappingForPath(pathString)
+	closestDocMapping := dm.closestDocMapping(pathString)
+
+	// check to see if we even need to do further processing
+	if subDocMapping != nil && !subDocMapping.Enabled {
+		return
+	}
+
+	propertyValue := reflect.ValueOf(property)
+	if !propertyValue.IsValid() {
+		// cannot do anything with the zero value
+		return
+	}
+	propertyType := propertyValue.Type()
+	switch propertyType.Kind() {
+	case reflect.String:
+		propertyValueString := propertyValue.String()
+		if subDocMapping != nil {
+			// index by explicit mapping
+			for _, fieldMapping := range subDocMapping.Fields {
+				fieldMapping.processString(propertyValueString, pathString, path, indexes, context)
+			}
+		} else if closestDocMapping.Dynamic {
+			// automatic indexing behavior
+
+			// first see if it can be parsed by the default date parser
+			dateTimeParser := context.im.DateTimeParserNamed(context.im.DefaultDateTimeParser)
+			if dateTimeParser != nil {
+				parsedDateTime, err := dateTimeParser.ParseDateTime(propertyValueString)
+				if err != nil {
+					// index as text
+					fieldMapping := newTextFieldMappingDynamic(context.im)
+					fieldMapping.processString(propertyValueString, pathString, path, indexes, context)
+				} else {
+					// index as datetime
+					fieldMapping := newDateTimeFieldMappingDynamic(context.im)
+					fieldMapping.processTime(parsedDateTime, pathString, path, indexes, context)
+				}
+			}
+		}
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		dm.processProperty(float64(propertyValue.Int()), path, indexes, context)
+		return
+	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
+		dm.processProperty(float64(propertyValue.Uint()), path, indexes, context)
+		return
+	case reflect.Float64, reflect.Float32:
+		propertyValFloat := propertyValue.Float()
+		if subDocMapping != nil {
+			// index by explicit mapping
+			for _, fieldMapping := range subDocMapping.Fields {
+				fieldMapping.processFloat64(propertyValFloat, pathString, path, indexes, context)
+			}
+		} else if closestDocMapping.Dynamic {
+			// automatic indexing behavior
+			fieldMapping := newNumericFieldMappingDynamic(context.im)
+			fieldMapping.processFloat64(propertyValFloat, pathString, path, indexes, context)
+		}
+	case reflect.Bool:
+		propertyValBool := propertyValue.Bool()
+		if subDocMapping != nil {
+			// index by explicit mapping
+			for _, fieldMapping := range subDocMapping.Fields {
+				fieldMapping.processBoolean(propertyValBool, pathString, path, indexes, context)
+			}
+		} else if closestDocMapping.Dynamic {
+			// automatic indexing behavior
+			fieldMapping := newBooleanFieldMappingDynamic(context.im)
+			fieldMapping.processBoolean(propertyValBool, pathString, path, indexes, context)
+		}
+	case reflect.Struct:
+		switch property := property.(type) {
+		case time.Time:
+			// don't descend into the time struct
+			if subDocMapping != nil {
+				// index by explicit mapping
+				for _, fieldMapping := range subDocMapping.Fields {
+					fieldMapping.processTime(property, pathString, path, indexes, context)
+				}
+			} else if closestDocMapping.Dynamic {
+				fieldMapping := newDateTimeFieldMappingDynamic(context.im)
+				fieldMapping.processTime(property, pathString, path, indexes, context)
+			}
+		default:
+			dm.walkDocument(property, path, indexes, context)
+		}
+	default:
+		dm.walkDocument(property, path, indexes, context)
+	}
+}

vendor/github.com/blevesearch/bleve/mapping/field.go

@@ -0,0 +1,296 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package mapping
+
+import (
+	"encoding/json"
+	"fmt"
+	"time"
+
+	"github.com/blevesearch/bleve/analysis"
+	"github.com/blevesearch/bleve/document"
+)
+
+// control the default behavior for dynamic fields (those not explicitly mapped)
+var (
+	IndexDynamic = true
+	StoreDynamic = true
+)
+
+// A FieldMapping describes how a specific item
+// should be put into the index.
+type FieldMapping struct {
+	Name string `json:"name,omitempty"`
+	Type string `json:"type,omitempty"`
+
+	// Analyzer specifies the name of the analyzer to use for this field.  If
+	// Analyzer is empty, traverse the DocumentMapping tree toward the root and
+	// pick the first non-empty DefaultAnalyzer found. If there is none, use
+	// the IndexMapping.DefaultAnalyzer.
+	Analyzer string `json:"analyzer,omitempty"`
+
+	// Store indicates whether to store field values in the index. Stored
+	// values can be retrieved from search results using SearchRequest.Fields.
+	Store bool `json:"store,omitempty"`
+	Index bool `json:"index,omitempty"`
+
+	// IncludeTermVectors, if true, makes terms occurrences to be recorded for
+	// this field. It includes the term position within the terms sequence and
+	// the term offsets in the source document field. Term vectors are required
+	// to perform phrase queries or terms highlighting in source documents.
+	IncludeTermVectors bool   `json:"include_term_vectors,omitempty"`
+	IncludeInAll       bool   `json:"include_in_all,omitempty"`
+	DateFormat         string `json:"date_format,omitempty"`
+}
+
+// NewTextFieldMapping returns a default field mapping for text
+func NewTextFieldMapping() *FieldMapping {
+	return &FieldMapping{
+		Type:               "text",
+		Store:              true,
+		Index:              true,
+		IncludeTermVectors: true,
+		IncludeInAll:       true,
+	}
+}
+
+func newTextFieldMappingDynamic(im *IndexMappingImpl) *FieldMapping {
+	rv := NewTextFieldMapping()
+	rv.Store = im.StoreDynamic
+	rv.Index = im.IndexDynamic
+	return rv
+}
+
+// NewNumericFieldMapping returns a default field mapping for numbers
+func NewNumericFieldMapping() *FieldMapping {
+	return &FieldMapping{
+		Type:         "number",
+		Store:        true,
+		Index:        true,
+		IncludeInAll: true,
+	}
+}
+
+func newNumericFieldMappingDynamic(im *IndexMappingImpl) *FieldMapping {
+	rv := NewNumericFieldMapping()
+	rv.Store = im.StoreDynamic
+	rv.Index = im.IndexDynamic
+	return rv
+}
+
+// NewDateTimeFieldMapping returns a default field mapping for dates
+func NewDateTimeFieldMapping() *FieldMapping {
+	return &FieldMapping{
+		Type:         "datetime",
+		Store:        true,
+		Index:        true,
+		IncludeInAll: true,
+	}
+}
+
+func newDateTimeFieldMappingDynamic(im *IndexMappingImpl) *FieldMapping {
+	rv := NewDateTimeFieldMapping()
+	rv.Store = im.StoreDynamic
+	rv.Index = im.IndexDynamic
+	return rv
+}
+
+// NewBooleanFieldMapping returns a default field mapping for booleans
+func NewBooleanFieldMapping() *FieldMapping {
+	return &FieldMapping{
+		Type:         "boolean",
+		Store:        true,
+		Index:        true,
+		IncludeInAll: true,
+	}
+}
+
+func newBooleanFieldMappingDynamic(im *IndexMappingImpl) *FieldMapping {
+	rv := NewBooleanFieldMapping()
+	rv.Store = im.StoreDynamic
+	rv.Index = im.IndexDynamic
+	return rv
+}
+
+// Options returns the indexing options for this field.
+func (fm *FieldMapping) Options() document.IndexingOptions {
+	var rv document.IndexingOptions
+	if fm.Store {
+		rv |= document.StoreField
+	}
+	if fm.Index {
+		rv |= document.IndexField
+	}
+	if fm.IncludeTermVectors {
+		rv |= document.IncludeTermVectors
+	}
+	return rv
+}
+
+func (fm *FieldMapping) processString(propertyValueString string, pathString string, path []string, indexes []uint64, context *walkContext) {
+	fieldName := getFieldName(pathString, path, fm)
+	options := fm.Options()
+	if fm.Type == "text" {
+		analyzer := fm.analyzerForField(path, context)
+		field := document.NewTextFieldCustom(fieldName, indexes, []byte(propertyValueString), options, analyzer)
+		context.doc.AddField(field)
+
+		if !fm.IncludeInAll {
+			context.excludedFromAll = append(context.excludedFromAll, fieldName)
+		}
+	} else if fm.Type == "datetime" {
+		dateTimeFormat := context.im.DefaultDateTimeParser
+		if fm.DateFormat != "" {
+			dateTimeFormat = fm.DateFormat
+		}
+		dateTimeParser := context.im.DateTimeParserNamed(dateTimeFormat)
+		if dateTimeParser != nil {
+			parsedDateTime, err := dateTimeParser.ParseDateTime(propertyValueString)
+			if err == nil {
+				fm.processTime(parsedDateTime, pathString, path, indexes, context)
+			}
+		}
+	}
+}
+
+func (fm *FieldMapping) processFloat64(propertyValFloat float64, pathString string, path []string, indexes []uint64, context *walkContext) {
+	fieldName := getFieldName(pathString, path, fm)
+	if fm.Type == "number" {
+		options := fm.Options()
+		field := document.NewNumericFieldWithIndexingOptions(fieldName, indexes, propertyValFloat, options)
+		context.doc.AddField(field)
+
+		if !fm.IncludeInAll {
+			context.excludedFromAll = append(context.excludedFromAll, fieldName)
+		}
+	}
+}
+
+func (fm *FieldMapping) processTime(propertyValueTime time.Time, pathString string, path []string, indexes []uint64, context *walkContext) {
+	fieldName := getFieldName(pathString, path, fm)
+	if fm.Type == "datetime" {
+		options := fm.Options()
+		field, err := document.NewDateTimeFieldWithIndexingOptions(fieldName, indexes, propertyValueTime, options)
+		if err == nil {
+			context.doc.AddField(field)
+		} else {
+			logger.Printf("could not build date %v", err)
+		}
+
+		if !fm.IncludeInAll {
+			context.excludedFromAll = append(context.excludedFromAll, fieldName)
+		}
+	}
+}
+
+func (fm *FieldMapping) processBoolean(propertyValueBool bool, pathString string, path []string, indexes []uint64, context *walkContext) {
+	fieldName := getFieldName(pathString, path, fm)
+	if fm.Type == "boolean" {
+		options := fm.Options()
+		field := document.NewBooleanFieldWithIndexingOptions(fieldName, indexes, propertyValueBool, options)
+		context.doc.AddField(field)
+
+		if !fm.IncludeInAll {
+			context.excludedFromAll = append(context.excludedFromAll, fieldName)
+		}
+	}
+}
+
+func (fm *FieldMapping) analyzerForField(path []string, context *walkContext) *analysis.Analyzer {
+	analyzerName := fm.Analyzer
+	if analyzerName == "" {
+		analyzerName = context.dm.defaultAnalyzerName(path)
+		if analyzerName == "" {
+			analyzerName = context.im.DefaultAnalyzer
+		}
+	}
+	return context.im.AnalyzerNamed(analyzerName)
+}
+
+func getFieldName(pathString string, path []string, fieldMapping *FieldMapping) string {
+	fieldName := pathString
+	if fieldMapping.Name != "" {
+		parentName := ""
+		if len(path) > 1 {
+			parentName = encodePath(path[:len(path)-1]) + pathSeparator
+		}
+		fieldName = parentName + fieldMapping.Name
+	}
+	return fieldName
+}
+
+// UnmarshalJSON offers custom unmarshaling with optional strict validation
+func (fm *FieldMapping) UnmarshalJSON(data []byte) error {
+
+	var tmp map[string]json.RawMessage
+	err := json.Unmarshal(data, &tmp)
+	if err != nil {
+		return err
+	}
+
+	var invalidKeys []string
+	for k, v := range tmp {
+		switch k {
+		case "name":
+			err := json.Unmarshal(v, &fm.Name)
+			if err != nil {
+				return err
+			}
+		case "type":
+			err := json.Unmarshal(v, &fm.Type)
+			if err != nil {
+				return err
+			}
+		case "analyzer":
+			err := json.Unmarshal(v, &fm.Analyzer)
+			if err != nil {
+				return err
+			}
+		case "store":
+			err := json.Unmarshal(v, &fm.Store)
+			if err != nil {
+				return err
+			}
+		case "index":
+			err := json.Unmarshal(v, &fm.Index)
+			if err != nil {
+				return err
+			}
+		case "include_term_vectors":
+			err := json.Unmarshal(v, &fm.IncludeTermVectors)
+			if err != nil {
+				return err
+			}
+		case "include_in_all":
+			err := json.Unmarshal(v, &fm.IncludeInAll)
+			if err != nil {
+				return err
+			}
+		case "date_format":
+			err := json.Unmarshal(v, &fm.DateFormat)
+			if err != nil {
+				return err
+			}
+		default:
+			invalidKeys = append(invalidKeys, k)
+		}
+	}
+
+	if MappingJSONStrict && len(invalidKeys) > 0 {
+		return fmt.Errorf("field mapping contains invalid keys: %v", invalidKeys)
+	}
+
+	return nil
+}

vendor/github.com/blevesearch/bleve/mapping/index.go

@@ -0,0 +1,430 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package mapping
+
+import (
+	"encoding/json"
+	"fmt"
+
+	"github.com/blevesearch/bleve/analysis"
+	"github.com/blevesearch/bleve/analysis/analyzer/standard"
+	"github.com/blevesearch/bleve/analysis/datetime/optional"
+	"github.com/blevesearch/bleve/document"
+	"github.com/blevesearch/bleve/registry"
+)
+
+var MappingJSONStrict = false
+
+const defaultTypeField = "_type"
+const defaultType = "_default"
+const defaultField = "_all"
+const defaultAnalyzer = standard.Name
+const defaultDateTimeParser = optional.Name
+
+// An IndexMappingImpl controls how objects are placed
+// into an index.
+// First the type of the object is determined.
+// Once the type is know, the appropriate
+// DocumentMapping is selected by the type.
+// If no mapping was determined for that type,
+// a DefaultMapping will be used.
+type IndexMappingImpl struct {
+	TypeMapping           map[string]*DocumentMapping `json:"types,omitempty"`
+	DefaultMapping        *DocumentMapping            `json:"default_mapping"`
+	TypeField             string                      `json:"type_field"`
+	DefaultType           string                      `json:"default_type"`
+	DefaultAnalyzer       string                      `json:"default_analyzer"`
+	DefaultDateTimeParser string                      `json:"default_datetime_parser"`
+	DefaultField          string                      `json:"default_field"`
+	StoreDynamic          bool                        `json:"store_dynamic"`
+	IndexDynamic          bool                        `json:"index_dynamic"`
+	CustomAnalysis        *customAnalysis             `json:"analysis,omitempty"`
+	cache                 *registry.Cache
+}
+
+// AddCustomCharFilter defines a custom char filter for use in this mapping
+func (im *IndexMappingImpl) AddCustomCharFilter(name string, config map[string]interface{}) error {
+	_, err := im.cache.DefineCharFilter(name, config)
+	if err != nil {
+		return err
+	}
+	im.CustomAnalysis.CharFilters[name] = config
+	return nil
+}
+
+// AddCustomTokenizer defines a custom tokenizer for use in this mapping
+func (im *IndexMappingImpl) AddCustomTokenizer(name string, config map[string]interface{}) error {
+	_, err := im.cache.DefineTokenizer(name, config)
+	if err != nil {
+		return err
+	}
+	im.CustomAnalysis.Tokenizers[name] = config
+	return nil
+}
+
+// AddCustomTokenMap defines a custom token map for use in this mapping
+func (im *IndexMappingImpl) AddCustomTokenMap(name string, config map[string]interface{}) error {
+	_, err := im.cache.DefineTokenMap(name, config)
+	if err != nil {
+		return err
+	}
+	im.CustomAnalysis.TokenMaps[name] = config
+	return nil
+}
+
+// AddCustomTokenFilter defines a custom token filter for use in this mapping
+func (im *IndexMappingImpl) AddCustomTokenFilter(name string, config map[string]interface{}) error {
+	_, err := im.cache.DefineTokenFilter(name, config)
+	if err != nil {
+		return err
+	}
+	im.CustomAnalysis.TokenFilters[name] = config
+	return nil
+}
+
+// AddCustomAnalyzer defines a custom analyzer for use in this mapping. The
+// config map must have a "type" string entry to resolve the analyzer
+// constructor. The constructor is invoked with the remaining entries and
+// returned analyzer is registered in the IndexMapping.
+//
+// bleve comes with predefined analyzers, like
+// github.com/blevesearch/bleve/analysis/analyzers/custom_analyzer. They are
+// available only if their package is imported by client code. To achieve this,
+// use their metadata to fill configuration entries:
+//
+//   import (
+//       "github.com/blevesearch/bleve/analysis/analyzers/custom_analyzer"
+//       "github.com/blevesearch/bleve/analysis/char_filters/html_char_filter"
+//       "github.com/blevesearch/bleve/analysis/token_filters/lower_case_filter"
+//       "github.com/blevesearch/bleve/analysis/tokenizers/unicode"
+//   )
+//
+//   m := bleve.NewIndexMapping()
+//   err := m.AddCustomAnalyzer("html", map[string]interface{}{
+//       "type": custom_analyzer.Name,
+//       "char_filters": []string{
+//           html_char_filter.Name,
+//       },
+//       "tokenizer":     unicode.Name,
+//       "token_filters": []string{
+//           lower_case_filter.Name,
+//           ...
+//       },
+//   })
+func (im *IndexMappingImpl) AddCustomAnalyzer(name string, config map[string]interface{}) error {
+	_, err := im.cache.DefineAnalyzer(name, config)
+	if err != nil {
+		return err
+	}
+	im.CustomAnalysis.Analyzers[name] = config
+	return nil
+}
+
+// AddCustomDateTimeParser defines a custom date time parser for use in this mapping
+func (im *IndexMappingImpl) AddCustomDateTimeParser(name string, config map[string]interface{}) error {
+	_, err := im.cache.DefineDateTimeParser(name, config)
+	if err != nil {
+		return err
+	}
+	im.CustomAnalysis.DateTimeParsers[name] = config
+	return nil
+}
+
+// NewIndexMapping creates a new IndexMapping that will use all the default indexing rules
+func NewIndexMapping() *IndexMappingImpl {
+	return &IndexMappingImpl{
+		TypeMapping:           make(map[string]*DocumentMapping),
+		DefaultMapping:        NewDocumentMapping(),
+		TypeField:             defaultTypeField,
+		DefaultType:           defaultType,
+		DefaultAnalyzer:       defaultAnalyzer,
+		DefaultDateTimeParser: defaultDateTimeParser,
+		DefaultField:          defaultField,
+		IndexDynamic:          IndexDynamic,
+		StoreDynamic:          StoreDynamic,
+		CustomAnalysis:        newCustomAnalysis(),
+		cache:                 registry.NewCache(),
+	}
+}
+
+// Validate will walk the entire structure ensuring the following
+// explicitly named and default analyzers can be built
+func (im *IndexMappingImpl) Validate() error {
+	_, err := im.cache.AnalyzerNamed(im.DefaultAnalyzer)
+	if err != nil {
+		return err
+	}
+	_, err = im.cache.DateTimeParserNamed(im.DefaultDateTimeParser)
+	if err != nil {
+		return err
+	}
+	err = im.DefaultMapping.Validate(im.cache)
+	if err != nil {
+		return err
+	}
+	for _, docMapping := range im.TypeMapping {
+		err = docMapping.Validate(im.cache)
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// AddDocumentMapping sets a custom document mapping for the specified type
+func (im *IndexMappingImpl) AddDocumentMapping(doctype string, dm *DocumentMapping) {
+	im.TypeMapping[doctype] = dm
+}
+
+func (im *IndexMappingImpl) mappingForType(docType string) *DocumentMapping {
+	docMapping := im.TypeMapping[docType]
+	if docMapping == nil {
+		docMapping = im.DefaultMapping
+	}
+	return docMapping
+}
+
+// UnmarshalJSON offers custom unmarshaling with optional strict validation
+func (im *IndexMappingImpl) UnmarshalJSON(data []byte) error {
+
+	var tmp map[string]json.RawMessage
+	err := json.Unmarshal(data, &tmp)
+	if err != nil {
+		return err
+	}
+
+	// set defaults for fields which might have been omitted
+	im.cache = registry.NewCache()
+	im.CustomAnalysis = newCustomAnalysis()
+	im.TypeField = defaultTypeField
+	im.DefaultType = defaultType
+	im.DefaultAnalyzer = defaultAnalyzer
+	im.DefaultDateTimeParser = defaultDateTimeParser
+	im.DefaultField = defaultField
+	im.DefaultMapping = NewDocumentMapping()
+	im.TypeMapping = make(map[string]*DocumentMapping)
+	im.StoreDynamic = StoreDynamic
+	im.IndexDynamic = IndexDynamic
+
+	var invalidKeys []string
+	for k, v := range tmp {
+		switch k {
+		case "analysis":
+			err := json.Unmarshal(v, &im.CustomAnalysis)
+			if err != nil {
+				return err
+			}
+		case "type_field":
+			err := json.Unmarshal(v, &im.TypeField)
+			if err != nil {
+				return err
+			}
+		case "default_type":
+			err := json.Unmarshal(v, &im.DefaultType)
+			if err != nil {
+				return err
+			}
+		case "default_analyzer":
+			err := json.Unmarshal(v, &im.DefaultAnalyzer)
+			if err != nil {
+				return err
+			}
+		case "default_datetime_parser":
+			err := json.Unmarshal(v, &im.DefaultDateTimeParser)
+			if err != nil {
+				return err
+			}
+		case "default_field":
+			err := json.Unmarshal(v, &im.DefaultField)
+			if err != nil {
+				return err
+			}
+		case "default_mapping":
+			err := json.Unmarshal(v, &im.DefaultMapping)
+			if err != nil {
+				return err
+			}
+		case "types":
+			err := json.Unmarshal(v, &im.TypeMapping)
+			if err != nil {
+				return err
+			}
+		case "store_dynamic":
+			err := json.Unmarshal(v, &im.StoreDynamic)
+			if err != nil {
+				return err
+			}
+		case "index_dynamic":
+			err := json.Unmarshal(v, &im.IndexDynamic)
+			if err != nil {
+				return err
+			}
+		default:
+			invalidKeys = append(invalidKeys, k)
+		}
+	}
+
+	if MappingJSONStrict && len(invalidKeys) > 0 {
+		return fmt.Errorf("index mapping contains invalid keys: %v", invalidKeys)
+	}
+
+	err = im.CustomAnalysis.registerAll(im)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func (im *IndexMappingImpl) determineType(data interface{}) string {
+	// first see if the object implements Classifier
+	classifier, ok := data.(Classifier)
+	if ok {
+		return classifier.Type()
+	}
+
+	// now see if we can find a type using the mapping
+	typ, ok := mustString(lookupPropertyPath(data, im.TypeField))
+	if ok {
+		return typ
+	}
+
+	return im.DefaultType
+}
+
+func (im *IndexMappingImpl) MapDocument(doc *document.Document, data interface{}) error {
+	docType := im.determineType(data)
+	docMapping := im.mappingForType(docType)
+	walkContext := im.newWalkContext(doc, docMapping)
+	if docMapping.Enabled {
+		docMapping.walkDocument(data, []string{}, []uint64{}, walkContext)
+
+		// see if the _all field was disabled
+		allMapping := docMapping.documentMappingForPath("_all")
+		if allMapping == nil || (allMapping.Enabled != false) {
+			field := document.NewCompositeFieldWithIndexingOptions("_all", true, []string{}, walkContext.excludedFromAll, document.IndexField|document.IncludeTermVectors)
+			doc.AddField(field)
+		}
+	}
+
+	return nil
+}
+
+type walkContext struct {
+	doc             *document.Document
+	im              *IndexMappingImpl
+	dm              *DocumentMapping
+	excludedFromAll []string
+}
+
+func (im *IndexMappingImpl) newWalkContext(doc *document.Document, dm *DocumentMapping) *walkContext {
+	return &walkContext{
+		doc:             doc,
+		im:              im,
+		dm:              dm,
+		excludedFromAll: []string{},
+	}
+}
+
+// AnalyzerNameForPath attempts to find the best analyzer to use with only a
+// field name will walk all the document types, look for field mappings at the
+// provided path, if one exists and it has an explicit analyzer that is
+// returned.
+func (im *IndexMappingImpl) AnalyzerNameForPath(path string) string {
+	// first we look for explicit mapping on the field
+	for _, docMapping := range im.TypeMapping {
+		analyzerName := docMapping.analyzerNameForPath(path)
+		if analyzerName != "" {
+			return analyzerName
+		}
+	}
+	// now try the default mapping
+	pathMapping := im.DefaultMapping.documentMappingForPath(path)
+	if pathMapping != nil {
+		if len(pathMapping.Fields) > 0 {
+			if pathMapping.Fields[0].Analyzer != "" {
+				return pathMapping.Fields[0].Analyzer
+			}
+		}
+	}
+
+	// next we will try default analyzers for the path
+	pathDecoded := decodePath(path)
+	for _, docMapping := range im.TypeMapping {
+		rv := docMapping.defaultAnalyzerName(pathDecoded)
+		if rv != "" {
+			return rv
+		}
+	}
+
+	return im.DefaultAnalyzer
+}
+
+func (im *IndexMappingImpl) AnalyzerNamed(name string) *analysis.Analyzer {
+	analyzer, err := im.cache.AnalyzerNamed(name)
+	if err != nil {
+		logger.Printf("error using analyzer named: %s", name)
+		return nil
+	}
+	return analyzer
+}
+
+func (im *IndexMappingImpl) DateTimeParserNamed(name string) analysis.DateTimeParser {
+	if name == "" {
+		name = im.DefaultDateTimeParser
+	}
+	dateTimeParser, err := im.cache.DateTimeParserNamed(name)
+	if err != nil {
+		logger.Printf("error using datetime parser named: %s", name)
+		return nil
+	}
+	return dateTimeParser
+}
+
+func (im *IndexMappingImpl) datetimeParserNameForPath(path string) string {
+
+	// first we look for explicit mapping on the field
+	for _, docMapping := range im.TypeMapping {
+		pathMapping := docMapping.documentMappingForPath(path)
+		if pathMapping != nil {
+			if len(pathMapping.Fields) > 0 {
+				if pathMapping.Fields[0].Analyzer != "" {
+					return pathMapping.Fields[0].Analyzer
+				}
+			}
+		}
+	}
+
+	return im.DefaultDateTimeParser
+}
+
+func (im *IndexMappingImpl) AnalyzeText(analyzerName string, text []byte) (analysis.TokenStream, error) {
+	analyzer, err := im.cache.AnalyzerNamed(analyzerName)
+	if err != nil {
+		return nil, err
+	}
+	return analyzer.Analyze(text), nil
+}
+
+// FieldAnalyzer returns the name of the analyzer used on a field.
+func (im *IndexMappingImpl) FieldAnalyzer(field string) string {
+	return im.AnalyzerNameForPath(field)
+}
+
+// wrapper to satisfy new interface
+
+func (im *IndexMappingImpl) DefaultSearchField() string {
+	return im.DefaultField
+}

vendor/github.com/blevesearch/bleve/mapping/mapping.go

@@ -0,0 +1,49 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package mapping
+
+import (
+	"io/ioutil"
+	"log"
+
+	"github.com/blevesearch/bleve/analysis"
+	"github.com/blevesearch/bleve/document"
+)
+
+// A Classifier is an interface describing any object
+// which knows how to identify its own type.
+type Classifier interface {
+	Type() string
+}
+
+var logger = log.New(ioutil.Discard, "bleve mapping ", log.LstdFlags)
+
+// SetLog sets the logger used for logging
+// by default log messages are sent to ioutil.Discard
+func SetLog(l *log.Logger) {
+	logger = l
+}
+
+type IndexMapping interface {
+	MapDocument(doc *document.Document, data interface{}) error
+	Validate() error
+
+	DateTimeParserNamed(name string) analysis.DateTimeParser
+
+	DefaultSearchField() string
+
+	AnalyzerNameForPath(path string) string
+	AnalyzerNamed(name string) *analysis.Analyzer
+}

vendor/github.com/blevesearch/bleve/mapping/reflect.go

@@ -0,0 +1,89 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package mapping
+
+import (
+	"reflect"
+	"strings"
+)
+
+func lookupPropertyPath(data interface{}, path string) interface{} {
+	pathParts := decodePath(path)
+
+	current := data
+	for _, part := range pathParts {
+		current = lookupPropertyPathPart(current, part)
+		if current == nil {
+			break
+		}
+	}
+
+	return current
+}
+
+func lookupPropertyPathPart(data interface{}, part string) interface{} {
+	val := reflect.ValueOf(data)
+	typ := val.Type()
+	switch typ.Kind() {
+	case reflect.Map:
+		// FIXME can add support for other map keys in the future
+		if typ.Key().Kind() == reflect.String {
+			key := reflect.ValueOf(part)
+			entry := val.MapIndex(key)
+			if entry.IsValid() {
+				return entry.Interface()
+			}
+		}
+	case reflect.Struct:
+		field := val.FieldByName(part)
+		if field.IsValid() && field.CanInterface() {
+			return field.Interface()
+		}
+	case reflect.Ptr:
+		ptrElem := val.Elem()
+		if ptrElem.IsValid() && ptrElem.CanInterface() {
+			return lookupPropertyPathPart(ptrElem.Interface(), part)
+		}
+	}
+	return nil
+}
+
+const pathSeparator = "."
+
+func decodePath(path string) []string {
+	return strings.Split(path, pathSeparator)
+}
+
+func encodePath(pathElements []string) string {
+	return strings.Join(pathElements, pathSeparator)
+}
+
+func mustString(data interface{}) (string, bool) {
+	if data != nil {
+		str, ok := data.(string)
+		if ok {
+			return str, true
+		}
+	}
+	return "", false
+}
+
+// parseTagName extracts the field name from a struct tag
+func parseTagName(tag string) string {
+	if idx := strings.Index(tag, ","); idx != -1 {
+		return tag[:idx]
+	}
+	return tag
+}

vendor/github.com/blevesearch/bleve/numeric/float.go

@@ -0,0 +1,34 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package numeric
+
+import (
+	"math"
+)
+
+func Float64ToInt64(f float64) int64 {
+	fasint := int64(math.Float64bits(f))
+	if fasint < 0 {
+		fasint = fasint ^ 0x7fffffffffffffff
+	}
+	return fasint
+}
+
+func Int64ToFloat64(i int64) float64 {
+	if i < 0 {
+		i ^= 0x7fffffffffffffff
+	}
+	return math.Float64frombits(uint64(i))
+}

vendor/github.com/blevesearch/bleve/numeric/prefix_coded.go

@@ -0,0 +1,92 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package numeric
+
+import "fmt"
+
+const ShiftStartInt64 byte = 0x20
+
+// PrefixCoded is a byte array encoding of
+// 64-bit numeric values shifted by 0-63 bits
+type PrefixCoded []byte
+
+func NewPrefixCodedInt64(in int64, shift uint) (PrefixCoded, error) {
+	if shift > 63 {
+		return nil, fmt.Errorf("cannot shift %d, must be between 0 and 63", shift)
+	}
+
+	nChars := ((63 - shift) / 7) + 1
+	rv := make(PrefixCoded, nChars+1)
+	rv[0] = ShiftStartInt64 + byte(shift)
+
+	sortableBits := int64(uint64(in) ^ 0x8000000000000000)
+	sortableBits = int64(uint64(sortableBits) >> shift)
+	for nChars > 0 {
+		// Store 7 bits per byte for compatibility
+		// with UTF-8 encoding of terms
+		rv[nChars] = byte(sortableBits & 0x7f)
+		nChars--
+		sortableBits = int64(uint64(sortableBits) >> 7)
+	}
+	return rv, nil
+}
+
+func MustNewPrefixCodedInt64(in int64, shift uint) PrefixCoded {
+	rv, err := NewPrefixCodedInt64(in, shift)
+	if err != nil {
+		panic(err)
+	}
+	return rv
+}
+
+// Shift returns the number of bits shifted
+// returns 0 if in uninitialized state
+func (p PrefixCoded) Shift() (uint, error) {
+	if len(p) > 0 {
+		shift := p[0] - ShiftStartInt64
+		if shift < 0 || shift < 63 {
+			return uint(shift), nil
+		}
+	}
+	return 0, fmt.Errorf("invalid prefix coded value")
+}
+
+func (p PrefixCoded) Int64() (int64, error) {
+	shift, err := p.Shift()
+	if err != nil {
+		return 0, err
+	}
+	var sortableBits int64
+	for _, inbyte := range p[1:] {
+		sortableBits <<= 7
+		sortableBits |= int64(inbyte)
+	}
+	return int64(uint64((sortableBits << shift)) ^ 0x8000000000000000), nil
+}
+
+func ValidPrefixCodedTerm(p string) (bool, int) {
+	if len(p) > 0 {
+		if p[0] < ShiftStartInt64 || p[0] > ShiftStartInt64+63 {
+			return false, 0
+		}
+		shift := p[0] - ShiftStartInt64
+		nChars := ((63 - int(shift)) / 7) + 1
+		if len(p) != nChars+1 {
+			return false, 0
+		}
+		return true, int(shift)
+	}
+	return false, 0
+}

vendor/github.com/blevesearch/bleve/query.go

@@ -0,0 +1,186 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package bleve
+
+import (
+	"time"
+
+	"github.com/blevesearch/bleve/search/query"
+)
+
+// NewBoolFieldQuery creates a new Query for boolean fields
+func NewBoolFieldQuery(val bool) *query.BoolFieldQuery {
+	return query.NewBoolFieldQuery(val)
+}
+
+// NewBooleanQuery creates a compound Query composed
+// of several other Query objects.
+// These other query objects are added using the
+// AddMust() AddShould() and AddMustNot() methods.
+// Result documents must satisfy ALL of the
+// must Queries.
+// Result documents must satisfy NONE of the must not
+// Queries.
+// Result documents that ALSO satisfy any of the should
+// Queries will score higher.
+func NewBooleanQuery() *query.BooleanQuery {
+	return query.NewBooleanQuery(nil, nil, nil)
+}
+
+// NewConjunctionQuery creates a new compound Query.
+// Result documents must satisfy all of the queries.
+func NewConjunctionQuery(conjuncts ...query.Query) *query.ConjunctionQuery {
+	return query.NewConjunctionQuery(conjuncts)
+}
+
+// NewDateRangeQuery creates a new Query for ranges
+// of date values.
+// Date strings are parsed using the DateTimeParser configured in the
+//  top-level config.QueryDateTimeParser
+// Either, but not both endpoints can be nil.
+func NewDateRangeQuery(start, end time.Time) *query.DateRangeQuery {
+	return query.NewDateRangeQuery(start, end)
+}
+
+// NewDateRangeInclusiveQuery creates a new Query for ranges
+// of date values.
+// Date strings are parsed using the DateTimeParser configured in the
+//  top-level config.QueryDateTimeParser
+// Either, but not both endpoints can be nil.
+// startInclusive and endInclusive control inclusion of the endpoints.
+func NewDateRangeInclusiveQuery(start, end time.Time, startInclusive, endInclusive *bool) *query.DateRangeQuery {
+	return query.NewDateRangeInclusiveQuery(start, end, startInclusive, endInclusive)
+}
+
+// NewDisjunctionQuery creates a new compound Query.
+// Result documents satisfy at least one Query.
+func NewDisjunctionQuery(disjuncts ...query.Query) *query.DisjunctionQuery {
+	return query.NewDisjunctionQuery(disjuncts)
+}
+
+// NewDocIDQuery creates a new Query object returning indexed documents among
+// the specified set. Combine it with ConjunctionQuery to restrict the scope of
+// other queries output.
+func NewDocIDQuery(ids []string) *query.DocIDQuery {
+	return query.NewDocIDQuery(ids)
+}
+
+// NewFuzzyQuery creates a new Query which finds
+// documents containing terms within a specific
+// fuzziness of the specified term.
+// The default fuzziness is 1.
+//
+// The current implementation uses Levenshtein edit
+// distance as the fuzziness metric.
+func NewFuzzyQuery(term string) *query.FuzzyQuery {
+	return query.NewFuzzyQuery(term)
+}
+
+// NewMatchAllQuery creates a Query which will
+// match all documents in the index.
+func NewMatchAllQuery() *query.MatchAllQuery {
+	return query.NewMatchAllQuery()
+}
+
+// NewMatchNoneQuery creates a Query which will not
+// match any documents in the index.
+func NewMatchNoneQuery() *query.MatchNoneQuery {
+	return query.NewMatchNoneQuery()
+}
+
+// NewMatchPhraseQuery creates a new Query object
+// for matching phrases in the index.
+// An Analyzer is chosen based on the field.
+// Input text is analyzed using this analyzer.
+// Token terms resulting from this analysis are
+// used to build a search phrase.  Result documents
+// must match this phrase. Queried field must have been indexed with
+// IncludeTermVectors set to true.
+func NewMatchPhraseQuery(matchPhrase string) *query.MatchPhraseQuery {
+	return query.NewMatchPhraseQuery(matchPhrase)
+}
+
+// NewMatchQuery creates a Query for matching text.
+// An Analyzer is chosen based on the field.
+// Input text is analyzed using this analyzer.
+// Token terms resulting from this analysis are
+// used to perform term searches.  Result documents
+// must satisfy at least one of these term searches.
+func NewMatchQuery(match string) *query.MatchQuery {
+	return query.NewMatchQuery(match)
+}
+
+// NewNumericRangeQuery creates a new Query for ranges
+// of numeric values.
+// Either, but not both endpoints can be nil.
+// The minimum value is inclusive.
+// The maximum value is exclusive.
+func NewNumericRangeQuery(min, max *float64) *query.NumericRangeQuery {
+	return query.NewNumericRangeQuery(min, max)
+}
+
+// NewNumericRangeInclusiveQuery creates a new Query for ranges
+// of numeric values.
+// Either, but not both endpoints can be nil.
+// Control endpoint inclusion with inclusiveMin, inclusiveMax.
+func NewNumericRangeInclusiveQuery(min, max *float64, minInclusive, maxInclusive *bool) *query.NumericRangeQuery {
+	return query.NewNumericRangeInclusiveQuery(min, max, minInclusive, maxInclusive)
+}
+
+// NewPhraseQuery creates a new Query for finding
+// exact term phrases in the index.
+// The provided terms must exist in the correct
+// order, at the correct index offsets, in the
+// specified field. Queried field must have been indexed with
+// IncludeTermVectors set to true.
+func NewPhraseQuery(terms []string, field string) *query.PhraseQuery {
+	return query.NewPhraseQuery(terms, field)
+}
+
+// NewPrefixQuery creates a new Query which finds
+// documents containing terms that start with the
+// specified prefix.
+func NewPrefixQuery(prefix string) *query.PrefixQuery {
+	return query.NewPrefixQuery(prefix)
+}
+
+// NewRegexpQuery creates a new Query which finds
+// documents containing terms that match the
+// specified regular expression.
+func NewRegexpQuery(regexp string) *query.RegexpQuery {
+	return query.NewRegexpQuery(regexp)
+}
+
+// NewQueryStringQuery creates a new Query used for
+// finding documents that satisfy a query string.  The
+// query string is a small query language for humans.
+func NewQueryStringQuery(q string) *query.QueryStringQuery {
+	return query.NewQueryStringQuery(q)
+}
+
+// NewTermQuery creates a new Query for finding an
+// exact term match in the index.
+func NewTermQuery(term string) *query.TermQuery {
+	return query.NewTermQuery(term)
+}
+
+// NewWildcardQuery creates a new Query which finds
+// documents containing terms that match the
+// specified wildcard.  In the wildcard pattern '*'
+// will match any sequence of 0 or more characters,
+// and '?' will match any single character.
+func NewWildcardQuery(wildcard string) *query.WildcardQuery {
+	return query.NewWildcardQuery(wildcard)
+}

vendor/github.com/blevesearch/bleve/registry/analyzer.go

@@ -0,0 +1,89 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package registry
+
+import (
+	"fmt"
+
+	"github.com/blevesearch/bleve/analysis"
+)
+
+func RegisterAnalyzer(name string, constructor AnalyzerConstructor) {
+	_, exists := analyzers[name]
+	if exists {
+		panic(fmt.Errorf("attempted to register duplicate analyzer named '%s'", name))
+	}
+	analyzers[name] = constructor
+}
+
+type AnalyzerConstructor func(config map[string]interface{}, cache *Cache) (*analysis.Analyzer, error)
+type AnalyzerRegistry map[string]AnalyzerConstructor
+
+type AnalyzerCache struct {
+	*ConcurrentCache
+}
+
+func NewAnalyzerCache() *AnalyzerCache {
+	return &AnalyzerCache{
+		NewConcurrentCache(),
+	}
+}
+
+func AnalyzerBuild(name string, config map[string]interface{}, cache *Cache) (interface{}, error) {
+	cons, registered := analyzers[name]
+	if !registered {
+		return nil, fmt.Errorf("no analyzer with name or type '%s' registered", name)
+	}
+	analyzer, err := cons(config, cache)
+	if err != nil {
+		return nil, fmt.Errorf("error building analyzer: %v", err)
+	}
+	return analyzer, nil
+}
+
+func (c *AnalyzerCache) AnalyzerNamed(name string, cache *Cache) (*analysis.Analyzer, error) {
+	item, err := c.ItemNamed(name, cache, AnalyzerBuild)
+	if err != nil {
+		return nil, err
+	}
+	return item.(*analysis.Analyzer), nil
+}
+
+func (c *AnalyzerCache) DefineAnalyzer(name string, typ string, config map[string]interface{}, cache *Cache) (*analysis.Analyzer, error) {
+	item, err := c.DefineItem(name, typ, config, cache, AnalyzerBuild)
+	if err != nil {
+		if err == ErrAlreadyDefined {
+			return nil, fmt.Errorf("analyzer named '%s' already defined", name)
+		}
+		return nil, err
+	}
+	return item.(*analysis.Analyzer), nil
+}
+
+func AnalyzerTypesAndInstances() ([]string, []string) {
+	emptyConfig := map[string]interface{}{}
+	emptyCache := NewCache()
+	var types []string
+	var instances []string
+	for name, cons := range analyzers {
+		_, err := cons(emptyConfig, emptyCache)
+		if err == nil {
+			instances = append(instances, name)
+		} else {
+			types = append(types, name)
+		}
+	}
+	return types, instances
+}

vendor/github.com/blevesearch/bleve/registry/cache.go

@@ -0,0 +1,87 @@
+//  Copyright (c) 2016 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package registry
+
+import (
+	"fmt"
+	"sync"
+)
+
+var ErrAlreadyDefined = fmt.Errorf("item already defined")
+
+type CacheBuild func(name string, config map[string]interface{}, cache *Cache) (interface{}, error)
+
+type ConcurrentCache struct {
+	mutex sync.RWMutex
+	data  map[string]interface{}
+}
+
+func NewConcurrentCache() *ConcurrentCache {
+	return &ConcurrentCache{
+		data: make(map[string]interface{}),
+	}
+}
+
+func (c *ConcurrentCache) ItemNamed(name string, cache *Cache, build CacheBuild) (interface{}, error) {
+	c.mutex.RLock()
+	item, cached := c.data[name]
+	if cached {
+		c.mutex.RUnlock()
+		return item, nil
+	}
+	// give up read lock
+	c.mutex.RUnlock()
+	// try to build it
+	newItem, err := build(name, nil, cache)
+	if err != nil {
+		return nil, err
+	}
+	// acquire write lock
+	c.mutex.Lock()
+	defer c.mutex.Unlock()
+	// check again because it could have been created while trading locks
+	item, cached = c.data[name]
+	if cached {
+		return item, nil
+	}
+	c.data[name] = newItem
+	return newItem, nil
+}
+
+func (c *ConcurrentCache) DefineItem(name string, typ string, config map[string]interface{}, cache *Cache, build CacheBuild) (interface{}, error) {
+	c.mutex.RLock()
+	_, cached := c.data[name]
+	if cached {
+		c.mutex.RUnlock()
+		return nil, ErrAlreadyDefined
+	}
+	// give up read lock so others lookups can proceed
+	c.mutex.RUnlock()
+	// really not there, try to build it
+	newItem, err := build(typ, config, cache)
+	if err != nil {
+		return nil, err
+	}
+	// now we've built it, acquire lock
+	c.mutex.Lock()
+	defer c.mutex.Unlock()
+	// check again because it could have been created while trading locks
+	_, cached = c.data[name]
+	if cached {
+		return nil, ErrAlreadyDefined
+	}
+	c.data[name] = newItem
+	return newItem, nil
+}

vendor/github.com/blevesearch/bleve/registry/char_filter.go

@@ -0,0 +1,89 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package registry
+
+import (
+	"fmt"
+
+	"github.com/blevesearch/bleve/analysis"
+)
+
+func RegisterCharFilter(name string, constructor CharFilterConstructor) {
+	_, exists := charFilters[name]
+	if exists {
+		panic(fmt.Errorf("attempted to register duplicate char filter named '%s'", name))
+	}
+	charFilters[name] = constructor
+}
+
+type CharFilterConstructor func(config map[string]interface{}, cache *Cache) (analysis.CharFilter, error)
+type CharFilterRegistry map[string]CharFilterConstructor
+
+type CharFilterCache struct {
+	*ConcurrentCache
+}
+
+func NewCharFilterCache() *CharFilterCache {
+	return &CharFilterCache{
+		NewConcurrentCache(),
+	}
+}
+
+func CharFilterBuild(name string, config map[string]interface{}, cache *Cache) (interface{}, error) {
+	cons, registered := charFilters[name]
+	if !registered {
+		return nil, fmt.Errorf("no char filter with name or type '%s' registered", name)
+	}
+	charFilter, err := cons(config, cache)
+	if err != nil {
+		return nil, fmt.Errorf("error building char filter: %v", err)
+	}
+	return charFilter, nil
+}
+
+func (c *CharFilterCache) CharFilterNamed(name string, cache *Cache) (analysis.CharFilter, error) {
+	item, err := c.ItemNamed(name, cache, CharFilterBuild)
+	if err != nil {
+		return nil, err
+	}
+	return item.(analysis.CharFilter), nil
+}
+
+func (c *CharFilterCache) DefineCharFilter(name string, typ string, config map[string]interface{}, cache *Cache) (analysis.CharFilter, error) {
+	item, err := c.DefineItem(name, typ, config, cache, CharFilterBuild)
+	if err != nil {
+		if err == ErrAlreadyDefined {
+			return nil, fmt.Errorf("char filter named '%s' already defined", name)
+		}
+		return nil, err
+	}
+	return item.(analysis.CharFilter), nil
+}
+
+func CharFilterTypesAndInstances() ([]string, []string) {
+	emptyConfig := map[string]interface{}{}
+	emptyCache := NewCache()
+	var types []string
+	var instances []string
+	for name, cons := range charFilters {
+		_, err := cons(emptyConfig, emptyCache)
+		if err == nil {
+			instances = append(instances, name)
+		} else {
+			types = append(types, name)
+		}
+	}
+	return types, instances
+}