media/jni/android_media_Utils.cpp

/*
 * Copyright 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.
 */

// #define LOG_NDEBUG 0
#define LOG_TAG "AndroidMediaUtils"

#include <utils/Log.h>
#include "android_media_Utils.h"

namespace android {

bool ConvertKeyValueArraysToKeyedVector(
        JNIEnv *env, jobjectArray keys, jobjectArray values,
        KeyedVector<String8, String8>* keyedVector) {

    int nKeyValuePairs = 0;
    bool failed = false;
    if (keys != NULL && values != NULL) {
        nKeyValuePairs = env->GetArrayLength(keys);
        failed = (nKeyValuePairs != env->GetArrayLength(values));
    }

    if (!failed) {
        failed = ((keys != NULL && values == NULL) ||
                  (keys == NULL && values != NULL));
    }

    if (failed) {
        LOGE("keys and values arrays have different length");
        jniThrowException(env, "java/lang/IllegalArgumentException", NULL);
        return false;
    }

    for (int i = 0; i < nKeyValuePairs; ++i) {
        // No need to check on the ArrayIndexOutOfBoundsException, since
        // it won't happen here.
        jstring key = (jstring) env->GetObjectArrayElement(keys, i);
        jstring value = (jstring) env->GetObjectArrayElement(values, i);

        const char* keyStr = env->GetStringUTFChars(key, NULL);
        if (!keyStr) {  // OutOfMemoryError
            return false;
        }

        const char* valueStr = env->GetStringUTFChars(value, NULL);
        if (!valueStr) {  // OutOfMemoryError
            env->ReleaseStringUTFChars(key, keyStr);
            return false;
        }

        keyedVector->add(String8(keyStr), String8(valueStr));

        env->ReleaseStringUTFChars(key, keyStr);
        env->ReleaseStringUTFChars(value, valueStr);
        env->DeleteLocalRef(key);
        env->DeleteLocalRef(value);
    }
    return true;
}

}  // namespace android