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      1 /*
      2  * Copyright (C) 2011 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #include "jni.h"
     18 #include "ScopedLocalRef.h"
     19 
     20 #include <string>
     21 #include <vector>
     22 
     23 template <typename Counter, typename Getter>
     24 jobjectArray toStringArray(JNIEnv* env, Counter* counter, Getter* getter) {
     25     size_t count = (*counter)();
     26     jobjectArray result = env->NewObjectArray(count, JniConstants::stringClass, NULL);
     27     if (result == NULL) {
     28         return NULL;
     29     }
     30     for (size_t i = 0; i < count; ++i) {
     31         ScopedLocalRef<jstring> s(env, env->NewStringUTF((*getter)(i)));
     32         if (env->ExceptionCheck()) {
     33             return NULL;
     34         }
     35         env->SetObjectArrayElement(result, i, s.get());
     36         if (env->ExceptionCheck()) {
     37             return NULL;
     38         }
     39     }
     40     return result;
     41 }
     42 
     43 template <typename Counter, typename Getter>
     44 jobjectArray toStringArray16(JNIEnv* env, Counter* counter, Getter* getter) {
     45     size_t count = (*counter)();
     46     jobjectArray result = env->NewObjectArray(count, JniConstants::stringClass, NULL);
     47     if (result == NULL) {
     48         return NULL;
     49     }
     50     for (size_t i = 0; i < count; ++i) {
     51         int32_t charCount;
     52         const jchar* chars = (*getter)(&charCount);
     53         ScopedLocalRef<jstring> s(env, env->NewString(chars, charCount));
     54         if (env->ExceptionCheck()) {
     55             return NULL;
     56         }
     57         env->SetObjectArrayElement(result, i, s.get());
     58         if (env->ExceptionCheck()) {
     59             return NULL;
     60         }
     61     }
     62     return result;
     63 }
     64 
     65 jobjectArray toStringArray(JNIEnv* env, const std::vector<std::string>& strings);
     66 jobjectArray toStringArray(JNIEnv* env, const char* const* strings);
     67