| /* |
| * Copyright (C) 2014 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #ifndef CORE_JNI_HELPERS |
| #define CORE_JNI_HELPERS |
| |
| #include <nativehelper/JNIHelp.h> |
| #include <android_runtime/AndroidRuntime.h> |
| |
| namespace android { |
| |
| // Defines some helpful functions. |
| |
| static inline jclass FindClassOrDie(JNIEnv* env, const char* class_name) { |
| jclass clazz = env->FindClass(class_name); |
| LOG_ALWAYS_FATAL_IF(clazz == NULL, "Unable to find class %s", class_name); |
| return clazz; |
| } |
| |
| static inline jfieldID GetFieldIDOrDie(JNIEnv* env, jclass clazz, const char* field_name, |
| const char* field_signature) { |
| jfieldID res = env->GetFieldID(clazz, field_name, field_signature); |
| LOG_ALWAYS_FATAL_IF(res == NULL, "Unable to find static field %s", field_name); |
| return res; |
| } |
| |
| static inline jmethodID GetMethodIDOrDie(JNIEnv* env, jclass clazz, const char* method_name, |
| const char* method_signature) { |
| jmethodID res = env->GetMethodID(clazz, method_name, method_signature); |
| LOG_ALWAYS_FATAL_IF(res == NULL, "Unable to find method %s", method_name); |
| return res; |
| } |
| |
| static inline jfieldID GetStaticFieldIDOrDie(JNIEnv* env, jclass clazz, const char* field_name, |
| const char* field_signature) { |
| jfieldID res = env->GetStaticFieldID(clazz, field_name, field_signature); |
| LOG_ALWAYS_FATAL_IF(res == NULL, "Unable to find static field %s", field_name); |
| return res; |
| } |
| |
| static inline jmethodID GetStaticMethodIDOrDie(JNIEnv* env, jclass clazz, const char* method_name, |
| const char* method_signature) { |
| jmethodID res = env->GetStaticMethodID(clazz, method_name, method_signature); |
| LOG_ALWAYS_FATAL_IF(res == NULL, "Unable to find static method %s", method_name); |
| return res; |
| } |
| |
| template <typename T> |
| static inline T MakeGlobalRefOrDie(JNIEnv* env, T in) { |
| jobject res = env->NewGlobalRef(in); |
| LOG_ALWAYS_FATAL_IF(res == NULL, "Unable to create global reference."); |
| return static_cast<T>(res); |
| } |
| |
| static inline int RegisterMethodsOrDie(JNIEnv* env, const char* className, |
| const JNINativeMethod* gMethods, int numMethods) { |
| int res = AndroidRuntime::registerNativeMethods(env, className, gMethods, numMethods); |
| LOG_ALWAYS_FATAL_IF(res < 0, "Unable to register native methods."); |
| return res; |
| } |
| |
| } // namespace android |
| |
| #endif // CORE_JNI_HELPERS |