content/browser/renderer_host/java/java_method.h

   1 // Copyright (c) 2011 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_RENDERER_HOST_JAVA_JAVA_METHOD_H_
   6 #define CONTENT_BROWSER_RENDERER_HOST_JAVA_JAVA_METHOD_H_
   7
   8 #include <jni.h>
   9 #include <string>
  10 #include <vector>
  11
  12 #include "base/android/scoped_java_ref.h"
  13 #include "content/browser/renderer_host/java/java_type.h"
  14
  15 namespace content {
  16
  17 // Wrapper around java.lang.reflect.Method. This class must be used on a single
  18 // thread only.
  19 class JavaMethod {
  20  public:
  21   explicit JavaMethod(const base::android::JavaRef<jobject>& method);
  22   ~JavaMethod();
  23
  24   const std::string& name() const { return name_; }
  25   size_t num_parameters() const;
  26   const JavaType& parameter_type(size_t index) const;
  27   const JavaType& return_type() const;
  28   jmethodID id() const;
  29
  30  private:
  31   void EnsureNumParametersIsSetUp() const;
  32   void EnsureTypesAndIDAreSetUp() const;
  33
  34   std::string name_;
  35   mutable base::android::ScopedJavaGlobalRef<jobject> java_method_;
  36   mutable bool have_calculated_num_parameters_;
  37   mutable size_t num_parameters_;
  38   mutable std::vector<JavaType> parameter_types_;
  39   mutable JavaType return_type_;
  40   mutable jmethodID id_;
  41
  42   DISALLOW_IMPLICIT_CONSTRUCTORS(JavaMethod);
  43 };
  44
  45 }  // namespace content
  46
  47 #endif  // CONTENT_BROWSER_RENDERER_HOST_JAVA_JAVA_METHOD_H_