| /* |
| * Copyright (C) 2011 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 LIBNATIVEHELPER_INCLUDE_NATIVEHELPER_TOSTRINGARRAY_H_ |
| #define LIBNATIVEHELPER_INCLUDE_NATIVEHELPER_TOSTRINGARRAY_H_ |
| |
| #include "libnativehelper_api.h" |
| |
| #ifdef __cplusplus |
| |
| #include <string> |
| #include <vector> |
| #include "ScopedLocalRef.h" |
| |
| template <typename Counter, typename Getter> |
| jobjectArray toStringArray(JNIEnv* env, Counter* counter, Getter* getter) { |
| size_t count = (*counter)(); |
| jobjectArray result = newStringArray(env, count); |
| if (result == NULL) { |
| return NULL; |
| } |
| for (size_t i = 0; i < count; ++i) { |
| ScopedLocalRef<jstring> s(env, env->NewStringUTF((*getter)(i))); |
| if (env->ExceptionCheck()) { |
| return NULL; |
| } |
| env->SetObjectArrayElement(result, i, s.get()); |
| if (env->ExceptionCheck()) { |
| return NULL; |
| } |
| } |
| return result; |
| } |
| |
| struct VectorCounter { |
| const std::vector<std::string>& strings; |
| explicit VectorCounter(const std::vector<std::string>& strings) : strings(strings) {} |
| size_t operator()() { |
| return strings.size(); |
| } |
| }; |
| struct VectorGetter { |
| const std::vector<std::string>& strings; |
| explicit VectorGetter(const std::vector<std::string>& strings) : strings(strings) {} |
| const char* operator()(size_t i) { |
| return strings[i].c_str(); |
| } |
| }; |
| |
| inline jobjectArray toStringArray(JNIEnv* env, const std::vector<std::string>& strings) { |
| VectorCounter counter(strings); |
| VectorGetter getter(strings); |
| return toStringArray<VectorCounter, VectorGetter>(env, &counter, &getter); |
| } |
| |
| #endif // __cplusplus |
| |
| #endif // LIBNATIVEHELPER_INCLUDE_NATIVEHELPER_TOSTRINGARRAY_H_ |