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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_NAMESPACE::Iterator methods from Java side.
#include "rocksdb/iterator.h"
#include <jni.h>
#include <stdio.h>
#include <stdlib.h>
#include <algorithm>
#include "include/org_rocksdb_RocksIterator.h"
#include "rocksjni/portal.h"
/*
* Class: org_rocksdb_RocksIterator
* Method: disposeInternal
* Signature: (J)V
*/
void Java_org_rocksdb_RocksIterator_disposeInternalJni(JNIEnv* /*env*/,
jclass /*cls*/,
jlong handle) {
auto* it = reinterpret_cast<ROCKSDB_NAMESPACE::Iterator*>(handle);
assert(it != nullptr);
delete it;
}
/*
* Class: org_rocksdb_RocksIterator
* Method: isValid0
* Signature: (J)Z
*/
jboolean Java_org_rocksdb_RocksIterator_isValid0Jni(JNIEnv* /*env*/,
jclass /*jcls*/,
jlong handle) {
return reinterpret_cast<ROCKSDB_NAMESPACE::Iterator*>(handle)->Valid();
}
/*
* Class: org_rocksdb_RocksIterator
* Method: seekToFirst0
* Signature: (J)V
*/
void Java_org_rocksdb_RocksIterator_seekToFirst0Jni(JNIEnv* /*env*/,
jclass /*jcls*/,
jlong handle) {
reinterpret_cast<ROCKSDB_NAMESPACE::Iterator*>(handle)->SeekToFirst();
}
/*
* Class: org_rocksdb_RocksIterator
* Method: seekToLast0
* Signature: (J)V
*/
void Java_org_rocksdb_RocksIterator_seekToLast0Jni(JNIEnv* /*env*/,
jclass /*jcls*/,
jlong handle) {
reinterpret_cast<ROCKSDB_NAMESPACE::Iterator*>(handle)->SeekToLast();
}
/*
* Class: org_rocksdb_RocksIterator
* Method: next0
* Signature: (J)V
*/
void Java_org_rocksdb_RocksIterator_next0Jni(JNIEnv* /*env*/, jclass /*jcls*/,
jlong handle) {
reinterpret_cast<ROCKSDB_NAMESPACE::Iterator*>(handle)->Next();
}
/*
* Class: org_rocksdb_RocksIterator
* Method: prev0
* Signature: (J)V
*/
void Java_org_rocksdb_RocksIterator_prev0Jni(JNIEnv* /*env*/, jclass /*jobj*/,
jlong handle) {
reinterpret_cast<ROCKSDB_NAMESPACE::Iterator*>(handle)->Prev();
}
/*
* Class: org_rocksdb_RocksIterator
* Method: refresh0
* Signature: (J)V
*/
void Java_org_rocksdb_RocksIterator_refresh0Jni(JNIEnv* env, jclass /*jcls*/,
jlong handle) {
auto* it = reinterpret_cast<ROCKSDB_NAMESPACE::Iterator*>(handle);
ROCKSDB_NAMESPACE::Status s = it->Refresh();
if (s.ok()) {
return;
}
ROCKSDB_NAMESPACE::RocksDBExceptionJni::ThrowNew(env, s);
}
/*
* Class: org_rocksdb_RocksIterator
* Method: refresh1
* Signature: (JJ)V
*/
void Java_org_rocksdb_RocksIterator_refresh1(JNIEnv* env, jobject /*jobj*/,
jlong handle,
jlong snapshot_handle) {
auto* it = reinterpret_cast<ROCKSDB_NAMESPACE::Iterator*>(handle);
auto* snapshot =
reinterpret_cast<ROCKSDB_NAMESPACE::Snapshot*>(snapshot_handle);
ROCKSDB_NAMESPACE::Status s = it->Refresh(snapshot);
if (s.ok()) {
return;
}
ROCKSDB_NAMESPACE::RocksDBExceptionJni::ThrowNew(env, s);
}
/*
* Class: org_rocksdb_RocksIterator
* Method: seek0
* Signature: (J[BI)V
*/
void Java_org_rocksdb_RocksIterator_seek0Jni(JNIEnv* env, jclass /*jcls*/,
jlong handle, jbyteArray jtarget,
jint jtarget_len) {
auto* it = reinterpret_cast<ROCKSDB_NAMESPACE::Iterator*>(handle);
auto seek = [&it](ROCKSDB_NAMESPACE::Slice& target_slice) {
it->Seek(target_slice);
};
ROCKSDB_NAMESPACE::JniUtil::k_op_region(seek, env, jtarget, 0, jtarget_len);
}
/*
* This method supports fetching into indirect byte buffers;
* the Java wrapper extracts the byte[] and passes it here.
* In this case, the buffer offset of the key may be non-zero.
*
* Class: org_rocksdb_RocksIterator
* Method: seek0
* Signature: (J[BII)V
*/
void Java_org_rocksdb_RocksIterator_seekByteArray0Jni(
JNIEnv* env, jclass /*jcls*/, jlong handle, jbyteArray jtarget,
jint jtarget_off, jint jtarget_len) {
auto* it = reinterpret_cast<ROCKSDB_NAMESPACE::Iterator*>(handle);
auto seek = [&it](ROCKSDB_NAMESPACE::Slice& target_slice) {
it->Seek(target_slice);
};
ROCKSDB_NAMESPACE::JniUtil::k_op_region(seek, env, jtarget, jtarget_off,
jtarget_len);
}
/*
* Class: org_rocksdb_RocksIterator
* Method: seekDirect0
* Signature: (JLjava/nio/ByteBuffer;II)V
*/
void Java_org_rocksdb_RocksIterator_seekDirect0Jni(JNIEnv* env, jclass /*jobj*/,
jlong handle,
jobject jtarget,
jint jtarget_off,
jint jtarget_len) {
auto* it = reinterpret_cast<ROCKSDB_NAMESPACE::Iterator*>(handle);
auto seek = [&it](ROCKSDB_NAMESPACE::Slice& target_slice) {
it->Seek(target_slice);
};
ROCKSDB_NAMESPACE::JniUtil::k_op_direct(seek, env, jtarget, jtarget_off,
jtarget_len);
}
/*
* Class: org_rocksdb_RocksIterator
* Method: seekForPrevDirect0
* Signature: (JLjava/nio/ByteBuffer;II)V
*/
void Java_org_rocksdb_RocksIterator_seekForPrevDirect0Jni(
JNIEnv* env, jclass /*jcls*/, jlong handle, jobject jtarget,
jint jtarget_off, jint jtarget_len) {
auto* it = reinterpret_cast<ROCKSDB_NAMESPACE::Iterator*>(handle);
auto seekPrev = [&it](ROCKSDB_NAMESPACE::Slice& target_slice) {
it->SeekForPrev(target_slice);
};
ROCKSDB_NAMESPACE::JniUtil::k_op_direct(seekPrev, env, jtarget, jtarget_off,
jtarget_len);
}
/*
* Class: org_rocksdb_RocksIterator
* Method: seekForPrev0
* Signature: (J[BI)V
*/
void Java_org_rocksdb_RocksIterator_seekForPrev0Jni(JNIEnv* env,
jclass /*jcls*/,
jlong handle,
jbyteArray jtarget,
jint jtarget_len) {
auto* it = reinterpret_cast<ROCKSDB_NAMESPACE::Iterator*>(handle);
auto seek = [&it](ROCKSDB_NAMESPACE::Slice& target_slice) {
it->SeekForPrev(target_slice);
};
ROCKSDB_NAMESPACE::JniUtil::k_op_region(seek, env, jtarget, 0, jtarget_len);
}
/*
* This method supports fetching into indirect byte buffers;
* the Java wrapper extracts the byte[] and passes it here.
* In this case, the buffer offset of the key may be non-zero.
*
* Class: org_rocksdb_RocksIterator
* Method: seek0
* Signature: (J[BII)V
*/
void Java_org_rocksdb_RocksIterator_seekForPrevByteArray0Jni(
JNIEnv* env, jclass /*jcls*/, jlong handle, jbyteArray jtarget,
jint jtarget_off, jint jtarget_len) {
auto* it = reinterpret_cast<ROCKSDB_NAMESPACE::Iterator*>(handle);
auto seek = [&it](ROCKSDB_NAMESPACE::Slice& target_slice) {
it->SeekForPrev(target_slice);
};
ROCKSDB_NAMESPACE::JniUtil::k_op_region(seek, env, jtarget, jtarget_off,
jtarget_len);
}
/*
* Class: org_rocksdb_RocksIterator
* Method: status0
* Signature: (J)V
*/
void Java_org_rocksdb_RocksIterator_status0Jni(JNIEnv* env, jclass /*jcls*/,
jlong handle) {
auto* it = reinterpret_cast<ROCKSDB_NAMESPACE::Iterator*>(handle);
ROCKSDB_NAMESPACE::Status s = it->status();
if (s.ok()) {
return;
}
ROCKSDB_NAMESPACE::RocksDBExceptionJni::ThrowNew(env, s);
}
/*
* Class: org_rocksdb_RocksIterator
* Method: key0
* Signature: (J)[B
*/
jbyteArray Java_org_rocksdb_RocksIterator_key0(JNIEnv* env, jclass /*jcls*/,
jlong handle) {
auto* it = reinterpret_cast<ROCKSDB_NAMESPACE::Iterator*>(handle);
ROCKSDB_NAMESPACE::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: keyDirect0
* Signature: (JLjava/nio/ByteBuffer;II)I
*/
jint Java_org_rocksdb_RocksIterator_keyDirect0(JNIEnv* env, jclass /*jcls*/,
jlong handle, jobject jtarget,
jint jtarget_off,
jint jtarget_len) {
auto* it = reinterpret_cast<ROCKSDB_NAMESPACE::Iterator*>(handle);
ROCKSDB_NAMESPACE::Slice key_slice = it->key();
return ROCKSDB_NAMESPACE::JniUtil::copyToDirect(env, key_slice, jtarget,
jtarget_off, jtarget_len);
}
/*
* This method supports fetching into indirect byte buffers;
* the Java wrapper extracts the byte[] and passes it here.
*
* Class: org_rocksdb_RocksIterator
* Method: keyByteArray0
* Signature: (J[BII)I
*/
jint Java_org_rocksdb_RocksIterator_keyByteArray0(JNIEnv* env, jclass /*jcls*/,
jlong handle, jbyteArray jkey,
jint jkey_off,
jint jkey_len) {
auto* it = reinterpret_cast<ROCKSDB_NAMESPACE::Iterator*>(handle);
ROCKSDB_NAMESPACE::Slice key_slice = it->key();
jsize copy_size = std::min(static_cast<uint32_t>(key_slice.size()),
static_cast<uint32_t>(jkey_len));
env->SetByteArrayRegion(
jkey, jkey_off, copy_size,
const_cast<jbyte*>(reinterpret_cast<const jbyte*>(key_slice.data())));
return static_cast<jsize>(key_slice.size());
}
/*
* Class: org_rocksdb_RocksIterator
* Method: value0
* Signature: (J)[B
*/
jbyteArray Java_org_rocksdb_RocksIterator_value0(JNIEnv* env, jclass /*jcls*/,
jlong handle) {
auto* it = reinterpret_cast<ROCKSDB_NAMESPACE::Iterator*>(handle);
ROCKSDB_NAMESPACE::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;
}
/*
* Class: org_rocksdb_RocksIterator
* Method: valueDirect0
* Signature: (JLjava/nio/ByteBuffer;II)I
*/
jint Java_org_rocksdb_RocksIterator_valueDirect0(JNIEnv* env, jclass /*jcls*/,
jlong handle, jobject jtarget,
jint jtarget_off,
jint jtarget_len) {
auto* it = reinterpret_cast<ROCKSDB_NAMESPACE::Iterator*>(handle);
ROCKSDB_NAMESPACE::Slice value_slice = it->value();
return ROCKSDB_NAMESPACE::JniUtil::copyToDirect(env, value_slice, jtarget,
jtarget_off, jtarget_len);
}
/*
* This method supports fetching into indirect byte buffers;
* the Java wrapper extracts the byte[] and passes it here.
*
* Class: org_rocksdb_RocksIterator
* Method: valueByteArray0
* Signature: (J[BII)I
*/
jint Java_org_rocksdb_RocksIterator_valueByteArray0(
JNIEnv* env, jclass /*jcls*/, jlong handle, jbyteArray jvalue_target,
jint jvalue_off, jint jvalue_len) {
auto* it = reinterpret_cast<ROCKSDB_NAMESPACE::Iterator*>(handle);
ROCKSDB_NAMESPACE::Slice value_slice = it->value();
jsize copy_size = std::min(static_cast<uint32_t>(value_slice.size()),
static_cast<uint32_t>(jvalue_len));
env->SetByteArrayRegion(
jvalue_target, jvalue_off, copy_size,
const_cast<jbyte*>(reinterpret_cast<const jbyte*>(value_slice.data())));
return static_cast<jsize>(value_slice.size());
}
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