Adding iterator JNI binding

java/rocksjni/iterator.cc

@@ -0,0 +1,41 @@
+// 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"
+
+jboolean Java_org_rocksdb_Iterator_isValid0(
+    JNIEnv* env, jobject jobj, jlong handle) {
+  auto st = reinterpret_cast<rocksdb::Iterator*>(handle);
+  assert(st != nullptr);
+  
+  return st->Valid();
+}
+
+void Java_org_rocksdb_Iterator_seekToFirst0(
+    JNIEnv* env, jobject jobj, jlong handle) {
+  auto st = reinterpret_cast<rocksdb::Iterator*>(handle);
+  assert(st != nullptr);
+  
+  st->SeekToFirst();
+}
+
+void Java_org_rocksdb_Iterator_close0(
+    JNIEnv* env, jobject jobj, jlong handle) {
+  auto st = reinterpret_cast<rocksdb::Iterator*>(handle);
+  assert(st != nullptr);
+  
+  delete st;
+  
+  rocksdb::IteratorJni::setHandle(env, jobj, nullptr);
+}