64 lines
1.7 KiB
Java
64 lines
1.7 KiB
Java
/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package it.cavallium.dbengine.lucene.comparators;
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import java.io.IOException;
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import org.apache.lucene.search.DocIdSetIterator;
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/** Docs iterator that starts iterating from a configurable minimum document */
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public class MinDocIterator extends DocIdSetIterator {
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final int segmentMinDoc;
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final int maxDoc;
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int doc = -1;
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MinDocIterator(int segmentMinDoc, int maxDoc) {
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this.segmentMinDoc = segmentMinDoc;
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this.maxDoc = maxDoc;
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}
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@Override
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public int docID() {
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return doc;
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}
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@Override
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public int nextDoc() throws IOException {
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return advance(doc + 1);
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}
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@Override
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public int advance(int target) throws IOException {
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assert target > doc;
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if (doc == -1) {
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// skip directly to minDoc
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doc = Math.max(target, segmentMinDoc);
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} else {
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doc = target;
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}
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if (doc >= maxDoc) {
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doc = NO_MORE_DOCS;
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}
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return doc;
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}
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@Override
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public long cost() {
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return maxDoc - segmentMinDoc;
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}
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}
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