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rocksdb/java/rocksjni/iterator.cc

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4.0 KiB

// 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_RocksIterator.h"
#include "rocksjni/portal.h"
#include "rocksdb/iterator.h"
/*
* Class: org_rocksdb_RocksIterator
* Method: isValid0
* Signature: (J)Z
*/
jboolean Java_org_rocksdb_RocksIterator_isValid0(
JNIEnv* env, jobject jobj, jlong handle) {
return reinterpret_cast<rocksdb::Iterator*>(handle)->Valid();
}
/*
* Class: org_rocksdb_RocksIterator
* Method: seekToFirst0
* Signature: (J)V
*/
void Java_org_rocksdb_RocksIterator_seekToFirst0(
JNIEnv* env, jobject jobj, jlong handle) {
reinterpret_cast<rocksdb::Iterator*>(handle)->SeekToFirst();
}
/*
* Class: org_rocksdb_RocksIterator
* Method: seekToFirst0
* Signature: (J)V
*/
void Java_org_rocksdb_RocksIterator_seekToLast0(
JNIEnv* env, jobject jobj, jlong handle) {
reinterpret_cast<rocksdb::Iterator*>(handle)->SeekToLast();
}
/*
* Class: org_rocksdb_RocksIterator
* Method: seekToLast0
* Signature: (J)V
*/
void Java_org_rocksdb_RocksIterator_next0(
JNIEnv* env, jobject jobj, jlong handle) {
reinterpret_cast<rocksdb::Iterator*>(handle)->Next();
}
/*
* Class: org_rocksdb_RocksIterator
* Method: next0
* Signature: (J)V
*/
void Java_org_rocksdb_RocksIterator_prev0(
JNIEnv* env, jobject jobj, jlong handle) {
reinterpret_cast<rocksdb::Iterator*>(handle)->Prev();
}
/*
* Class: org_rocksdb_RocksIterator
* Method: prev0
* Signature: (J)V
*/
jbyteArray Java_org_rocksdb_RocksIterator_key0(
JNIEnv* env, jobject jobj, jlong handle) {
auto it = reinterpret_cast<rocksdb::Iterator*>(handle);
rocksdb::Slice key_slice = it->key();
jbyteArray jkey = env->NewByteArray(static_cast<jsize>(key_slice.size()));
env->SetByteArrayRegion(jkey, 0, static_cast<jsize>(key_slice.size()),
reinterpret_cast<const jbyte*>(key_slice.data()));
return jkey;
}
/*
* Class: org_rocksdb_RocksIterator
* Method: key0
* Signature: (J)[B
*/
jbyteArray Java_org_rocksdb_RocksIterator_value0(
JNIEnv* env, jobject jobj, jlong handle) {
auto it = reinterpret_cast<rocksdb::Iterator*>(handle);
rocksdb::Slice value_slice = it->value();
jbyteArray jkeyValue =
env->NewByteArray(static_cast<jsize>(value_slice.size()));
env->SetByteArrayRegion(jkeyValue, 0, static_cast<jsize>(value_slice.size()),
reinterpret_cast<const jbyte*>(value_slice.data()));
return jkeyValue;
}
/*
* Class: org_rocksdb_RocksIterator
* Method: value0
* Signature: (J)[B
*/
void Java_org_rocksdb_RocksIterator_seek0(
JNIEnv* env, jobject jobj, jlong handle,
jbyteArray jtarget, jint jtarget_len) {
auto it = reinterpret_cast<rocksdb::Iterator*>(handle);
jbyte* target = env->GetByteArrayElements(jtarget, 0);
rocksdb::Slice target_slice(
reinterpret_cast<char*>(target), jtarget_len);
it->Seek(target_slice);
env->ReleaseByteArrayElements(jtarget, target, JNI_ABORT);
}
/*
* Class: org_rocksdb_RocksIterator
* Method: seek0
* Signature: (J[BI)V
*/
void Java_org_rocksdb_RocksIterator_status0(
JNIEnv* env, jobject jobj, jlong handle) {
auto it = reinterpret_cast<rocksdb::Iterator*>(handle);
rocksdb::Status s = it->status();
if (s.ok()) {
return;
}
rocksdb::RocksDBExceptionJni::ThrowNew(env, s);
}
/*
* Class: org_rocksdb_RocksIterator
* Method: disposeInternal
* Signature: (J)V
*/
void Java_org_rocksdb_RocksIterator_disposeInternal(
JNIEnv* env, jobject jobj, jlong handle) {
auto it = reinterpret_cast<rocksdb::Iterator*>(handle);
delete it;
}