[Android] Fix method invocation and wrappers cleanup handling in Java Bridge

content/renderer/java/gin_java_function_invocation_helper.cc

+// Copyright 2015 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/renderer/java/gin_java_function_invocation_helper.h"
+
+#include "content/common/android/gin_java_bridge_errors.h"
+#include "content/common/android/gin_java_bridge_value.h"
+#include "content/public/child/v8_value_converter.h"
+#include "content/renderer/java/gin_java_bridge_object.h"
+#include "content/renderer/java/gin_java_bridge_value_converter.h"
+
+namespace content {
+
+namespace {
+
+const char kMethodInvocationAsConstructorDisallowed[] =
+    "Java bridge method can't be invoked as a constructor";
+const char kMethodInvocationOnNonInjectedObjectDisallowed[] =
+    "Java bridge method can't be invoked on a non-injected object";
+const char kMethodInvocationErrorMessage[] =
+    "Java bridge method invocation error";
+
+}  // namespace
+
+GinJavaFunctionInvocationHelper::GinJavaFunctionInvocationHelper(
+    const std::string& method_name,
+    const base::WeakPtr<GinJavaBridgeDispatcher>& dispatcher)
+    : method_name_(method_name),
+      dispatcher_(dispatcher),
+      converter_(new GinJavaBridgeValueConverter()) {
+}
+
+GinJavaFunctionInvocationHelper::~GinJavaFunctionInvocationHelper() {
+}
+
+v8::Handle<v8::Value> GinJavaFunctionInvocationHelper::Invoke(
+    gin::Arguments* args) {
+  if (!dispatcher_) {
+    args->isolate()->ThrowException(v8::Exception::Error(gin::StringToV8(
+        args->isolate(), kMethodInvocationErrorMessage)));
+    return v8::Undefined(args->isolate());
+  }
+
+  if (args->IsConstructCall()) {
+    args->isolate()->ThrowException(v8::Exception::Error(gin::StringToV8(
+        args->isolate(), kMethodInvocationAsConstructorDisallowed)));
+    return v8::Undefined(args->isolate());
+  }
+
+  content::GinJavaBridgeObject* object = NULL;
+  if (!args->GetHolder(&object) || !object) {
+    args->isolate()->ThrowException(v8::Exception::Error(gin::StringToV8(
+        args->isolate(), kMethodInvocationOnNonInjectedObjectDisallowed)));
+    return v8::Undefined(args->isolate());
+  }
+
+  base::ListValue arguments;
+  {
+    v8::HandleScope handle_scope(args->isolate());
+    v8::Handle<v8::Context> context = args->isolate()->GetCurrentContext();
+    v8::Handle<v8::Value> val;
+    while (args->GetNext(&val)) {
+      scoped_ptr<base::Value> arg(converter_->FromV8Value(val, context));
+      if (arg.get()) {
+        arguments.Append(arg.release());
+      } else {
+        arguments.Append(base::Value::CreateNullValue());
+      }
+    }
+  }
+
+  GinJavaBridgeError error;
+  scoped_ptr<base::Value> result = dispatcher_->InvokeJavaMethod(
+      object->object_id(), method_name_, arguments, &error);
+  if (!result.get()) {
+    args->isolate()->ThrowException(v8::Exception::Error(gin::StringToV8(
+        args->isolate(), GinJavaBridgeErrorToString(error))));
+    return v8::Undefined(args->isolate());
+  }
+  if (!result->IsType(base::Value::TYPE_BINARY)) {
+    return converter_->ToV8Value(result.get(),
+                                 args->isolate()->GetCurrentContext());
+  }
+
+  scoped_ptr<const GinJavaBridgeValue> gin_value =
+      GinJavaBridgeValue::FromValue(result.get());
+  if (gin_value->IsType(GinJavaBridgeValue::TYPE_OBJECT_ID)) {
+    GinJavaBridgeObject* result = NULL;
+    GinJavaBridgeDispatcher::ObjectID object_id;
+    if (gin_value->GetAsObjectID(&object_id)) {
+      result = dispatcher_->GetObject(object_id);
+    }
+    if (result) {
+      gin::Handle<GinJavaBridgeObject> controller =
+          gin::CreateHandle(args->isolate(), result);
+      if (controller.IsEmpty())
+        return v8::Undefined(args->isolate());
+      return controller.ToV8();
+    }
+  } else if (gin_value->IsType(GinJavaBridgeValue::TYPE_NONFINITE)) {
+    float float_value;
+    gin_value->GetAsNonFinite(&float_value);
+    return v8::Number::New(args->isolate(), float_value);
+  }
+  return v8::Undefined(args->isolate());
+}
+
+}  // namespace content