messagereceiver.cpp

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/**
 * @copyright
 * ====================================================================
 * Copyright (c) 2003 CollabNet.  All rights reserved.
 *
 * This software is licensed as described in the file COPYING, which
 * you should have received as part of this distribution.  The terms
 * are also available at http://subversion.tigris.org/license-1.html.
 * If newer versions of this license are posted there, you may use a
 * newer version instead, at your option.
 *
 * This software consists of voluntary contributions made by many
 * individuals.  For exact contribution history, see the revision
 * history and logs, available at http://subversion.tigris.org/.
 * ====================================================================
 * @endcopyright
 *
 * @file MessageReceiver.cpp
 * @brief Implementation of the class MessageReceiver
 */

#include "MessageReceiver.h"
#include "JNIUtil.h"
/**
 * create a new object and store the local reference to the java object
 */
MessageReceiver::MessageReceiver(jobject jthis)
{
    m_jthis = jthis;
}
/**
 * destroy the object
 */
MessageReceiver::~MessageReceiver()
{
    // the m_callback does not need to be destroyed, because it is the passed 
    // in parameter to the java method.
}
/**
 * send a message to the java object
 * @param message   the message to be send
 */
void MessageReceiver::receiveMessage(const char *message)
{
    JNIEnv *env = JNIUtil::getEnv();
    static jmethodID mid = 0; // the method id will not change during
                              // the time this library is loaded, so
                              // it can be cached. 
    if(mid == 0)
    {
        jclass clazz = env->FindClass(JAVA_PACKAGE"/SVNAdmin$MessageReceiver");
        if(JNIUtil::isJavaExceptionThrown())
        {
            return;
        }
        mid = env->GetMethodID(clazz, "receiveMessageLine", 
            "(Ljava/lang/String;)V");
        if(JNIUtil::isJavaExceptionThrown() || mid == 0)
        {
            return;
        }
        env->DeleteLocalRef(clazz);
        if(JNIUtil::isJavaExceptionThrown())
        {
            return;
        }
    }
    // convert the message to a java string
    jstring jmsg = JNIUtil::makeJString(message);
    if(JNIUtil::isJavaExceptionThrown())
    {
        return;
    }
    
    // call the java method
    env->CallVoidMethod(m_jthis, mid);
    if(JNIUtil::isJavaExceptionThrown())
    {
        return;
    }

    // delete the java string
    env->DeleteLocalRef(jmsg);
    if(JNIUtil::isJavaExceptionThrown())
    {
        return;
    }
}