Add JavaBoundObject

base/android/jni_android.cc

 // 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.
 
 #include "base/android/jni_android.h"
 
+#include "base/android/scoped_java_ref.h"
 #include "base/logging.h"
 
 namespace {
 JavaVM* g_jvm = 0;
 jobject g_application_context = NULL;
 }
 
 namespace base {
 namespace android {
 
@@ skipping 22 matching lines @@
 void InitApplicationContext(jobject context) {
   DCHECK(!g_application_context);
   g_application_context = context;
 }
 
 jobject GetApplicationContext() {
   DCHECK(g_application_context);
   return g_application_context;
 }
 
+jmethodID GetMethodIDFromClassName(JNIEnv* env,
+                                   const char* const class_name,
+                                   const char* const method,
+                                   const char* const jni_signature) {
+  ScopedJavaLocalRef<jclass> clazz(env, env->FindClass(class_name));
+  return GetMethodID(env, clazz.obj(), method, jni_signature);
+}
+
 jmethodID GetMethodID(JNIEnv* env,
                       jclass clazz,
                       const char* const method,
                       const char* const jni_signature) {
   jmethodID id = env->GetMethodID(clazz, method, jni_signature);
   DCHECK(id) << method;
   CheckException(env);
   return id;
 }
 
 jmethodID GetStaticMethodID(JNIEnv* env,
                             jclass clazz,
                             const char* const method,
                             const char* const jni_signature) {
   jmethodID id = env->GetStaticMethodID(clazz, method, jni_signature);
   DCHECK(id) << method;
   CheckException(env);
   return id;
 }
 
+jfieldID GetFieldID(JNIEnv* env,
+                    jclass clazz,
+                    const char* const field,

[M-A Ruel, 2011/11/11 13:31:13]

const char* field,

making the pointer itself const has no impact. The coding style in chromium
never uses that.

I commented on the original CL but for now, don't do that for new functions.

[Steve Block, 2011/11/11 16:05:20]

Done.

+                    const char* const jni_signature) {
+  jfieldID id = env->GetFieldID(clazz, field, jni_signature);
+  DCHECK(id) << field;
+  CheckException(env);
+  return id;
+}
+
 bool CheckException(JNIEnv* env) {
   if (env->ExceptionCheck() == JNI_FALSE)
     return false;
   env->ExceptionDescribe();
   env->ExceptionClear();
   return true;
 }
 
 }  // namespace android
 }  // namespace base