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// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
// This source code is licensed under both the GPLv2 (found in the
// COPYING file in the root directory) and Apache 2.0 License
// (found in the LICENSE.Apache file in the root directory).
//
// This file implements the "bridge" between Java and C++ and enables
// calling c++ rocksdb::Iterator methods from Java side.
#include <jni.h>
#include <stdio.h>
#include <stdlib.h>
#include "include/org_rocksdb_RocksIterator.h"
#include "rocksdb/iterator.h"
#include "rocksjni/portal.h"
/*
* 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);
assert(it != nullptr);
delete it;
}
/*
* 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: seekToLast0
* 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: next0
* 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: prev0
* 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: seek0
* Signature: (J[BI)V
*/
void Java_org_rocksdb_RocksIterator_seek0(JNIEnv* env, jobject /*jobj*/,
jlong handle, jbyteArray jtarget,
jint jtarget_len) {
jbyte* target = env->GetByteArrayElements(jtarget, nullptr);
if (target == nullptr) {
// exception thrown: OutOfMemoryError
return;
}
rocksdb::Slice target_slice(reinterpret_cast<char*>(target), jtarget_len);
auto* it = reinterpret_cast<rocksdb::Iterator*>(handle);
it->Seek(target_slice);
env->ReleaseByteArrayElements(jtarget, target, JNI_ABORT);
}
/*
* Class: org_rocksdb_RocksIterator
* Method: seekForPrev0
* Signature: (J[BI)V
*/
void Java_org_rocksdb_RocksIterator_seekForPrev0(JNIEnv* env, jobject /*jobj*/,
jlong handle,
jbyteArray jtarget,
jint jtarget_len) {
jbyte* target = env->GetByteArrayElements(jtarget, nullptr);
if (target == nullptr) {
// exception thrown: OutOfMemoryError
return;
}
rocksdb::Slice target_slice(reinterpret_cast<char*>(target), jtarget_len);
auto* it = reinterpret_cast<rocksdb::Iterator*>(handle);
it->SeekForPrev(target_slice);
env->ReleaseByteArrayElements(jtarget, target, JNI_ABORT);
}
/*
* Class: org_rocksdb_RocksIterator
* Method: status0
* Signature: (J)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: key0
* Signature: (J)[B
*/
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()));
if (jkey == nullptr) {
// exception thrown: OutOfMemoryError
return nullptr;
}
env->SetByteArrayRegion(
jkey, 0, static_cast<jsize>(key_slice.size()),
const_cast<jbyte*>(reinterpret_cast<const jbyte*>(key_slice.data())));
return jkey;
}
/*
* Class: org_rocksdb_RocksIterator
* Method: value0
* 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()));
if (jkeyValue == nullptr) {
// exception thrown: OutOfMemoryError
return nullptr;
}
env->SetByteArrayRegion(
jkeyValue, 0, static_cast<jsize>(value_slice.size()),
const_cast<jbyte*>(reinterpret_cast<const jbyte*>(value_slice.data())));
return jkeyValue;
}
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