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71 lines
2.2 KiB
71 lines
2.2 KiB
/* |
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* Copyright (C) 2011 The Android Open Source Project |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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#ifndef TO_STRING_ARRAY_H_included |
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#define TO_STRING_ARRAY_H_included |
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#include "jni.h" |
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#include "ScopedLocalRef.h" |
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#include <string> |
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#include <vector> |
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jobjectArray newStringArray(JNIEnv* env, size_t count); |
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template <typename Counter, typename Getter> |
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jobjectArray toStringArray(JNIEnv* env, Counter* counter, Getter* getter) { |
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size_t count = (*counter)(); |
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jobjectArray result = newStringArray(env, count); |
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if (result == NULL) { |
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return NULL; |
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} |
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for (size_t i = 0; i < count; ++i) { |
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ScopedLocalRef<jstring> s(env, env->NewStringUTF((*getter)(i))); |
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if (env->ExceptionCheck()) { |
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return NULL; |
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} |
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env->SetObjectArrayElement(result, i, s.get()); |
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if (env->ExceptionCheck()) { |
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return NULL; |
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} |
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} |
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return result; |
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} |
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struct VectorCounter { |
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const std::vector<std::string>& strings; |
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explicit VectorCounter(const std::vector<std::string>& strings) : strings(strings) {} |
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size_t operator()() { |
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return strings.size(); |
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} |
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}; |
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struct VectorGetter { |
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const std::vector<std::string>& strings; |
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explicit VectorGetter(const std::vector<std::string>& strings) : strings(strings) {} |
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const char* operator()(size_t i) { |
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return strings[i].c_str(); |
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} |
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}; |
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inline jobjectArray toStringArray(JNIEnv* env, const std::vector<std::string>& strings) { |
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VectorCounter counter(strings); |
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VectorGetter getter(strings); |
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return toStringArray<VectorCounter, VectorGetter>(env, &counter, &getter); |
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} |
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JNIEXPORT jobjectArray toStringArray(JNIEnv* env, const char* const* strings); |
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#endif // TO_STRING_ARRAY_H_included
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