content/browser/android/java/gin_java_bound_object.h

   1 // 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 #ifndef CONTENT_BROWSER_ANDROID_JAVA_GIN_JAVA_BOUND_OBJECT_H_
   6 #define CONTENT_BROWSER_ANDROID_JAVA_GIN_JAVA_BOUND_OBJECT_H_
   7
   8 #include <map>
   9 #include <set>
  10
  11 #include "base/android/jni_weak_ref.h"
  12 #include "base/android/scoped_java_ref.h"
  13 #include "base/memory/linked_ptr.h"
  14 #include "base/memory/ref_counted.h"
  15 #include "base/values.h"
  16 #include "content/browser/android/java/java_method.h"
  17
  18 namespace content {
  19
  20 class GinJavaBoundObject
  21     : public base::RefCountedThreadSafe<GinJavaBoundObject> {
  22  public:
  23   typedef int32 ObjectID;
  24
  25   static GinJavaBoundObject* CreateNamed(
  26       const JavaObjectWeakGlobalRef& ref,
  27       const base::android::JavaRef<jclass>& safe_annotation_clazz);
  28   static GinJavaBoundObject* CreateTransient(
  29       const JavaObjectWeakGlobalRef& ref,
  30       const base::android::JavaRef<jclass>& safe_annotation_clazz,
  31       int32 holder);
  32
  33   // The following methods can be called on any thread.
  34   JavaObjectWeakGlobalRef& GetWeakRef() { return ref_; }
  35   base::android::ScopedJavaLocalRef<jobject> GetLocalRef(JNIEnv* env) {
  36     return ref_.get(env);
  37   }
  38
  39   bool IsNamed() { return names_count_ > 0; }
  40   void AddName() { ++names_count_; }
  41   void RemoveName() { --names_count_; }
  42
  43   // The following methods are called on the background thread.
  44   bool HasHolders() { return !holders_.empty(); }
  45   void AddHolder(int32 holder) { holders_.insert(holder); }
  46   void RemoveHolder(int32 holder) { holders_.erase(holder); }
  47
  48   std::set<std::string> GetMethodNames();
  49   bool HasMethod(const std::string& method_name);
  50   const JavaMethod* FindMethod(const std::string& method_name,
  51                                size_t num_parameters);
  52   bool IsObjectGetClassMethod(const JavaMethod* method);
  53   const base::android::JavaRef<jclass>& GetSafeAnnotationClass();
  54   base::android::ScopedJavaLocalRef<jclass> GetLocalClassRef(JNIEnv* env);
  55
  56  private:
  57   friend class base::RefCountedThreadSafe<GinJavaBoundObject>;
  58
  59   GinJavaBoundObject(
  60       const JavaObjectWeakGlobalRef& ref,
  61       const base::android::JavaRef<jclass>& safe_annotation_clazz);
  62   GinJavaBoundObject(
  63       const JavaObjectWeakGlobalRef& ref,
  64       const base::android::JavaRef<jclass>& safe_annotation_clazz,
  65       const std::set<int32>& holders);
  66   ~GinJavaBoundObject();
  67
  68   // The following methods are called on the background thread.
  69   void EnsureMethodsAreSetUp();
  70
  71   JavaObjectWeakGlobalRef ref_;
  72
  73   // An object must be kept in retained_object_set_ either if it has
  74   // names or if it has a non-empty holders set.
  75   int names_count_;
  76   std::set<int32> holders_;
  77
  78   // The following fields are accessed on the background thread.
  79   typedef std::multimap<std::string, linked_ptr<JavaMethod> > JavaMethodMap;
  80   JavaMethodMap methods_;
  81   jmethodID object_get_class_method_id_;
  82   bool are_methods_set_up_;
  83   base::android::ScopedJavaGlobalRef<jclass> safe_annotation_clazz_;
  84 };
  85
  86 }  // namespace content
  87
  88 #endif  // CONTENT_BROWSER_ANDROID_JAVA_GIN_JAVA_BOUND_OBJECT_H_