blob: 35a76dab7692bffbe4d4ed1c416189f05eee44f9 [file] [log] [blame]
James Robinson646469d2014-10-03 15:33:28 -07001// Copyright 2014 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/jni_weak_ref.h"
6
7#include "base/android/jni_android.h"
8#include "base/logging.h"
9
10using base::android::AttachCurrentThread;
11
12JavaObjectWeakGlobalRef::JavaObjectWeakGlobalRef()
13 : obj_(NULL) {
14}
15
16JavaObjectWeakGlobalRef::JavaObjectWeakGlobalRef(
17 const JavaObjectWeakGlobalRef& orig)
18 : obj_(NULL) {
19 Assign(orig);
20}
21
22JavaObjectWeakGlobalRef::JavaObjectWeakGlobalRef(JNIEnv* env, jobject obj)
23 : obj_(env->NewWeakGlobalRef(obj)) {
24 DCHECK(obj_);
25}
26
27JavaObjectWeakGlobalRef::~JavaObjectWeakGlobalRef() {
28 reset();
29}
30
31void JavaObjectWeakGlobalRef::operator=(const JavaObjectWeakGlobalRef& rhs) {
32 Assign(rhs);
33}
34
35void JavaObjectWeakGlobalRef::reset() {
36 if (obj_) {
37 AttachCurrentThread()->DeleteWeakGlobalRef(obj_);
38 obj_ = NULL;
39 }
40}
41
42base::android::ScopedJavaLocalRef<jobject>
43 JavaObjectWeakGlobalRef::get(JNIEnv* env) const {
44 return GetRealObject(env, obj_);
45}
46
47base::android::ScopedJavaLocalRef<jobject> GetRealObject(
48 JNIEnv* env, jweak obj) {
49 jobject real = NULL;
50 if (obj) {
51 real = env->NewLocalRef(obj);
52 if (!real)
53 DLOG(ERROR) << "The real object has been deleted!";
54 }
55 return base::android::ScopedJavaLocalRef<jobject>(env, real);
56}
57
58void JavaObjectWeakGlobalRef::Assign(const JavaObjectWeakGlobalRef& other) {
59 if (&other == this)
60 return;
61
62 JNIEnv* env = AttachCurrentThread();
63 if (obj_)
64 env->DeleteWeakGlobalRef(obj_);
65
66 obj_ = other.obj_ ? env->NewWeakGlobalRef(other.obj_) : NULL;
67}