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-rw-r--r--src/rocksdb/java/rocksjni/iterator.cc252
1 files changed, 252 insertions, 0 deletions
diff --git a/src/rocksdb/java/rocksjni/iterator.cc b/src/rocksdb/java/rocksjni/iterator.cc
new file mode 100644
index 000000000..2935adc58
--- /dev/null
+++ b/src/rocksdb/java/rocksjni/iterator.cc
@@ -0,0 +1,252 @@
+// 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 <jni.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <algorithm>
+
+#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_NAMESPACE::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_NAMESPACE::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_NAMESPACE::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_NAMESPACE::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_NAMESPACE::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_NAMESPACE::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_NAMESPACE::Slice target_slice(reinterpret_cast<char*>(target),
+ jtarget_len);
+
+ auto* it = reinterpret_cast<ROCKSDB_NAMESPACE::Iterator*>(handle);
+ it->Seek(target_slice);
+
+ env->ReleaseByteArrayElements(jtarget, target, JNI_ABORT);
+}
+
+/*
+ * Class: org_rocksdb_RocksIterator
+ * Method: seekDirect0
+ * Signature: (JLjava/nio/ByteBuffer;II)V
+ */
+void Java_org_rocksdb_RocksIterator_seekDirect0(JNIEnv* env, jobject /*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_seekForPrevDirect0(
+ JNIEnv* env, jobject /*jobj*/, 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_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_NAMESPACE::Slice target_slice(reinterpret_cast<char*>(target),
+ jtarget_len);
+
+ auto* it = reinterpret_cast<ROCKSDB_NAMESPACE::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_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, jobject /*jobj*/,
+ 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, jobject /*jobj*/,
+ 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);
+}
+
+/*
+ * 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_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, jobject /*jobj*/,
+ 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);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-19 22:53:49 +0000