| // Copyright 2014 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "content/browser/android/java/gin_java_bound_object.h" |
| |
| #include "base/android/jni_android.h" |
| #include "base/android/scoped_java_ref.h" |
| #include "content/browser/android/java/jni_reflect.h" |
| |
| #include "jni/Object_jni.h" |
| |
| using base::android::AttachCurrentThread; |
| using base::android::ScopedJavaLocalRef; |
| |
| namespace content { |
| |
| // static |
| GinJavaBoundObject* GinJavaBoundObject::CreateNamed( |
| const JavaObjectWeakGlobalRef& ref, |
| const base::android::JavaRef<jclass>& safe_annotation_clazz) { |
| return new GinJavaBoundObject(ref, safe_annotation_clazz); |
| } |
| |
| // static |
| GinJavaBoundObject* GinJavaBoundObject::CreateTransient( |
| const JavaObjectWeakGlobalRef& ref, |
| const base::android::JavaRef<jclass>& safe_annotation_clazz, |
| int32_t holder) { |
| std::set<int32_t> holders; |
| holders.insert(holder); |
| return new GinJavaBoundObject(ref, safe_annotation_clazz, holders); |
| } |
| |
| GinJavaBoundObject::GinJavaBoundObject( |
| const JavaObjectWeakGlobalRef& ref, |
| const base::android::JavaRef<jclass>& safe_annotation_clazz) |
| : ref_(ref), |
| names_count_(1), |
| are_methods_set_up_(false), |
| safe_annotation_clazz_(safe_annotation_clazz) { |
| } |
| |
| GinJavaBoundObject::GinJavaBoundObject( |
| const JavaObjectWeakGlobalRef& ref, |
| const base::android::JavaRef<jclass>& safe_annotation_clazz, |
| const std::set<int32_t>& holders) |
| : ref_(ref), |
| names_count_(0), |
| holders_(holders), |
| are_methods_set_up_(false), |
| safe_annotation_clazz_(safe_annotation_clazz) {} |
| |
| GinJavaBoundObject::~GinJavaBoundObject() { |
| } |
| |
| std::set<std::string> GinJavaBoundObject::GetMethodNames() { |
| EnsureMethodsAreSetUp(); |
| std::set<std::string> result; |
| for (JavaMethodMap::const_iterator it = methods_.begin(); |
| it != methods_.end(); |
| ++it) { |
| result.insert(it->first); |
| } |
| return result; |
| } |
| |
| bool GinJavaBoundObject::HasMethod(const std::string& method_name) { |
| EnsureMethodsAreSetUp(); |
| return methods_.find(method_name) != methods_.end(); |
| } |
| |
| const JavaMethod* GinJavaBoundObject::FindMethod( |
| const std::string& method_name, |
| size_t num_parameters) { |
| EnsureMethodsAreSetUp(); |
| |
| // Get all methods with the correct name. |
| std::pair<JavaMethodMap::const_iterator, JavaMethodMap::const_iterator> |
| iters = methods_.equal_range(method_name); |
| if (iters.first == iters.second) { |
| return NULL; |
| } |
| |
| // LIVECONNECT_COMPLIANCE: We just take the first method with the correct |
| // number of arguments, while the spec proposes using cost-based algorithm: |
| // https://jdk6.java.net/plugin2/liveconnect/#OVERLOADED_METHODS |
| for (JavaMethodMap::const_iterator iter = iters.first; iter != iters.second; |
| ++iter) { |
| if (iter->second->num_parameters() == num_parameters) { |
| return iter->second.get(); |
| } |
| } |
| |
| return NULL; |
| } |
| |
| bool GinJavaBoundObject::IsObjectGetClassMethod(const JavaMethod* method) { |
| EnsureMethodsAreSetUp(); |
| // As java.lang.Object.getClass is declared to be final, it is sufficient to |
| // compare methodIDs. |
| JNIEnv* env = AttachCurrentThread(); |
| jmethodID get_class_method_id = |
| base::android::MethodID::LazyGet<base::android::MethodID::TYPE_INSTANCE>( |
| env, java_lang_Object_clazz(env), "getClass", "()Ljava/lang/Class;", |
| &JNI_Object::g_java_lang_Object_getClass); |
| return method->id() == get_class_method_id; |
| } |
| |
| const base::android::JavaRef<jclass>& |
| GinJavaBoundObject::GetSafeAnnotationClass() { |
| return safe_annotation_clazz_; |
| } |
| |
| base::android::ScopedJavaLocalRef<jclass> GinJavaBoundObject::GetLocalClassRef( |
| JNIEnv* env) { |
| ScopedJavaLocalRef<jobject> obj = GetLocalRef(env); |
| if (obj.obj()) { |
| return JNI_Object::Java_Object_getClass(env, obj); |
| } else { |
| return base::android::ScopedJavaLocalRef<jclass>(); |
| } |
| } |
| |
| void GinJavaBoundObject::EnsureMethodsAreSetUp() { |
| if (are_methods_set_up_) |
| return; |
| are_methods_set_up_ = true; |
| |
| JNIEnv* env = AttachCurrentThread(); |
| |
| ScopedJavaLocalRef<jclass> clazz = GetLocalClassRef(env); |
| if (clazz.is_null()) { |
| return; |
| } |
| |
| ScopedJavaLocalRef<jobjectArray> methods(GetClassMethods(env, clazz)); |
| size_t num_methods = env->GetArrayLength(methods.obj()); |
| // Java objects always have public methods. |
| DCHECK(num_methods); |
| |
| for (size_t i = 0; i < num_methods; ++i) { |
| ScopedJavaLocalRef<jobject> java_method( |
| env, |
| env->GetObjectArrayElement(methods.obj(), i)); |
| |
| if (!safe_annotation_clazz_.is_null()) { |
| if (!IsAnnotationPresent(env, java_method, safe_annotation_clazz_)) |
| continue; |
| } |
| |
| std::unique_ptr<JavaMethod> method(new JavaMethod(java_method)); |
| methods_.insert(std::make_pair(method->name(), std::move(method))); |
| } |
| } |
| |
| } // namespace content |