rocksdb/java/rocksjni/iterator.cc

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// Copyright (c) 2014, Facebook, Inc. All rights reserved.
// This source code is licensed under the BSD-style license found in the
// LICENSE file in the root directory of this source tree. An additional grant
// of patent rights can be found in the PATENTS file in the same directory.
//
// This file implements the "bridge" between Java and C++ and enables
// calling c++ rocksdb::Iterator methods from Java side.
#include <stdio.h>
#include <stdlib.h>
#include <jni.h>
#include "include/org_rocksdb_Iterator.h"
#include "rocksjni/portal.h"
#include "rocksdb/iterator.h"
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/*
* Class: org_rocksdb_Iterator
* Method: isValid0
* Signature: (J)Z
*/
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jboolean Java_org_rocksdb_Iterator_isValid0(
JNIEnv* env, jobject jobj, jlong handle) {
return reinterpret_cast<rocksdb::Iterator*>(handle)->Valid();
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}
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/*
* Class: org_rocksdb_Iterator
* Method: close0
* Signature: (J)V
*/
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void Java_org_rocksdb_Iterator_seekToFirst0(
JNIEnv* env, jobject jobj, jlong handle) {
reinterpret_cast<rocksdb::Iterator*>(handle)->SeekToFirst();
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}
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/*
* Class: org_rocksdb_Iterator
* Method: seekToFirst0
* Signature: (J)V
*/
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void Java_org_rocksdb_Iterator_seekToLast0(
JNIEnv* env, jobject jobj, jlong handle) {
reinterpret_cast<rocksdb::Iterator*>(handle)->SeekToLast();
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}
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/*
* Class: org_rocksdb_Iterator
* Method: seekToLast0
* Signature: (J)V
*/
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void Java_org_rocksdb_Iterator_next0(
JNIEnv* env, jobject jobj, jlong handle) {
reinterpret_cast<rocksdb::Iterator*>(handle)->Next();
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}
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/*
* Class: org_rocksdb_Iterator
* Method: next0
* Signature: (J)V
*/
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void Java_org_rocksdb_Iterator_prev0(
JNIEnv* env, jobject jobj, jlong handle) {
reinterpret_cast<rocksdb::Iterator*>(handle)->Prev();
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}
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/*
* Class: org_rocksdb_Iterator
* Method: prev0
* Signature: (J)V
*/
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jbyteArray Java_org_rocksdb_Iterator_key0(
JNIEnv* env, jobject jobj, jlong handle) {
auto it = reinterpret_cast<rocksdb::Iterator*>(handle);
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rocksdb::Slice key_slice = it->key();
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jbyteArray jkey = env->NewByteArray(key_slice.size());
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env->SetByteArrayRegion(
jkey, 0, key_slice.size(),
reinterpret_cast<const jbyte*>(key_slice.data()));
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return jkey;
}
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/*
* Class: org_rocksdb_Iterator
* Method: key0
* Signature: (J)[B
*/
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jbyteArray Java_org_rocksdb_Iterator_value0(
JNIEnv* env, jobject jobj, jlong handle) {
auto it = reinterpret_cast<rocksdb::Iterator*>(handle);
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rocksdb::Slice value_slice = it->value();
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jbyteArray jvalue = env->NewByteArray(value_slice.size());
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env->SetByteArrayRegion(
jvalue, 0, value_slice.size(),
reinterpret_cast<const jbyte*>(value_slice.data()));
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return jvalue;
}
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/*
* Class: org_rocksdb_Iterator
* Method: value0
* Signature: (J)[B
*/
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void Java_org_rocksdb_Iterator_seek0(
JNIEnv* env, jobject jobj, jlong handle,
jbyteArray jtarget, jint jtarget_len) {
auto it = reinterpret_cast<rocksdb::Iterator*>(handle);
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jbyte* target = env->GetByteArrayElements(jtarget, 0);
rocksdb::Slice target_slice(
reinterpret_cast<char*>(target), jtarget_len);
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it->Seek(target_slice);
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env->ReleaseByteArrayElements(jtarget, target, JNI_ABORT);
}
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/*
* Class: org_rocksdb_Iterator
* Method: seek0
* Signature: (J[BI)V
*/
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void Java_org_rocksdb_Iterator_status0(
JNIEnv* env, jobject jobj, jlong handle) {
auto it = reinterpret_cast<rocksdb::Iterator*>(handle);
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rocksdb::Status s = it->status();
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if (s.ok()) {
return;
}
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rocksdb::RocksDBExceptionJni::ThrowNew(env, s);
}
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/*
* Class: org_rocksdb_Iterator
* Method: status0
* Signature: (J)V
*/
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void Java_org_rocksdb_Iterator_close0(
JNIEnv* env, jobject jobj, jlong handle) {
auto it = reinterpret_cast<rocksdb::Iterator*>(handle);
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delete it;
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rocksdb::IteratorJni::setHandle(env, jobj, nullptr);
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}