base/android/scoped_java_ref.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "base/android/scoped_java_ref.h"
   6
   7 #include "base/android/jni_android.h"
   8 #include "base/logging.h"
   9
  10 namespace base {
  11 namespace android {
  12
  13 JavaRef<jobject>::JavaRef() : obj_(NULL) {}
  14
  15 JavaRef<jobject>::JavaRef(JNIEnv* env, jobject obj) : obj_(obj) {
  16   if (obj) {
  17     DCHECK(env && env->GetObjectRefType(obj) == JNILocalRefType);
  18   }
  19 }
  20
  21 JavaRef<jobject>::~JavaRef() {
  22 }
  23
  24 JNIEnv* JavaRef<jobject>::SetNewLocalRef(JNIEnv* env, jobject obj) {
  25   if (!env) {
  26     env = AttachCurrentThread();
  27   } else {
  28     DCHECK_EQ(env, AttachCurrentThread());  // Is |env| on correct thread.
  29   }
  30   if (obj)
  31     obj = env->NewLocalRef(obj);
  32   if (obj_)
  33     env->DeleteLocalRef(obj_);
  34   obj_ = obj;
  35   return env;
  36 }
  37
  38 void JavaRef<jobject>::SetNewGlobalRef(JNIEnv* env, jobject obj) {
  39   if (!env) {
  40     env = AttachCurrentThread();
  41   } else {
  42     DCHECK_EQ(env, AttachCurrentThread());  // Is |env| on correct thread.
  43   }
  44   if (obj)
  45     obj = env->NewGlobalRef(obj);
  46   if (obj_)
  47     env->DeleteGlobalRef(obj_);
  48   obj_ = obj;
  49 }
  50
  51 void JavaRef<jobject>::ResetLocalRef(JNIEnv* env) {
  52   if (obj_) {
  53     DCHECK_EQ(env, AttachCurrentThread());  // Is |env| on correct thread.
  54     env->DeleteLocalRef(obj_);
  55     obj_ = NULL;
  56   }
  57 }
  58
  59 void JavaRef<jobject>::ResetGlobalRef() {
  60   if (obj_) {
  61     AttachCurrentThread()->DeleteGlobalRef(obj_);
  62     obj_ = NULL;
  63   }
  64 }
  65
  66 jobject JavaRef<jobject>::ReleaseInternal() {
  67   jobject obj = obj_;
  68   obj_ = NULL;
  69   return obj;
  70 }
  71
  72 }  // namespace android
  73 }  // namespace base