Add JavaBoundObject

content/browser/renderer_host/java/java_method.h

+// Copyright (c) 2011 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.
+
+#ifndef CONTENT_BROWSER_RENDERER_HOST_JAVA_JAVA_METHOD_H_
+#define CONTENT_BROWSER_RENDERER_HOST_JAVA_JAVA_METHOD_H_
+
+#include <jni.h>
+#include <string>
+#include <vector>
+
+#include "base/android/scoped_java_ref.h"
+
+namespace JavaType {
+enum Type {
+  TypeBoolean,
+  TypeByte,
+  TypeChar,
+  TypeShort,
+  TypeInt,
+  TypeLong,
+  TypeFloat,
+  TypeDouble,
+  // This is only used as a return type, so we should never convert from
+  // JavaScript with this type.
+  TypeVoid,
+  TypeArray,
+  // We special-case strings, as they get special handling when coercing.
+  TypeString,
+  TypeObject,
+};
+}  // namespace JavaType
+
+// Wrapper around java.lang.reflect.Method. This class must be used on a single
+// thread only.
+class JavaMethod {
+ public:
+  explicit JavaMethod(const base::android::JavaRef<jobject>& method);
+  ~JavaMethod();
+
+  const std::string& name() const { return name_; }
+  size_t num_parameters() const;
+  JavaType::Type parameter_type(size_t index) const;
+  JavaType::Type return_type() const;
+  jmethodID id() const;
+
+ private:
+  void EnsureNumParametersIsSetUp() const;
+  void EnsureTypesAndIDAreSetUp() const;
+
+  std::string name_;
+  mutable base::android::ScopedJavaGlobalRef<jobject> java_method_;
+  mutable bool have_calculated_num_parameters_;
+  mutable size_t num_parameters_;
+  mutable std::vector<JavaType::Type> parameter_types_;
+  mutable JavaType::Type return_type_;
+  mutable jmethodID id_;
+
+  DISALLOW_IMPLICIT_CONSTRUCTORS(JavaMethod);
+};
+
+#endif  // CONTENT_BROWSER_RENDERER_HOST_JAVA_JAVA_METHOD_H_