/**
* @copyright
* ====================================================================
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
* ====================================================================
* @endcopyright
*
* @file OutputStream.cpp
* @brief Implementation of the class OutputStream
*/
#include "OutputStream.h"
#include "JNIUtil.h"
#include "JNIByteArray.h"
/**
* Create an OutputStream object.
* @param jthis the Java object to be stored
*/
OutputStream::OutputStream(jobject jthis)
{
m_jthis = jthis;
}
/**
* Destroy an Inputer object.
*/
OutputStream::~OutputStream()
{
// The m_jthis does not need to be destroyed, because it is the
// passed in parameter to the Java method.
}
/**
* Create a svn_stream_t structure for this object. This will be used
* as an output stream by Subversion.
* @param pool the pool, from which the structure is allocated
* @return the output stream
*/
svn_stream_t *OutputStream::getStream(const SVN::Pool &pool)
{
// Create a stream with this as the baton and set the write and
// close functions.
svn_stream_t *ret = svn_stream_create(this, pool.getPool());
svn_stream_set_write(ret, OutputStream::write);
svn_stream_set_close(ret, OutputStream::close);
return ret;
}
/**
* Implements svn_write_fn_t to write data out from Subversion.
* @param baton an OutputStream object for the callback
* @param buffer the buffer for the write data
* @param len on input the buffer len, on output the number of written
* bytes
* @return a subversion error or SVN_NO_ERROR
*/
svn_error_t *OutputStream::write(void *baton, const char *buffer,
apr_size_t *len)
{
JNIEnv *env = JNIUtil::getEnv();
// An object of our class is passed in as the baton.
OutputStream *that = (OutputStream*)baton;
// The method id will not change during the time this library is
// loaded, so it can be cached.
static jmethodID mid = 0;
if (mid == 0)
{
jclass clazz = env->FindClass("java/io/OutputStream");
if (JNIUtil::isJavaExceptionThrown())
return SVN_NO_ERROR;
mid = env->GetMethodID(clazz, "write", "([B)V");
if (JNIUtil::isJavaExceptionThrown() || mid == 0)
return SVN_NO_ERROR;
env->DeleteLocalRef(clazz);
}
// convert the data to a Java byte array
jbyteArray data = JNIUtil::makeJByteArray((const signed char*)buffer,
*len);
if (JNIUtil::isJavaExceptionThrown())
return SVN_NO_ERROR;
// write the data
env->CallObjectMethod(that->m_jthis, mid, data);
if (JNIUtil::isJavaExceptionThrown())
return SVN_NO_ERROR;
env->DeleteLocalRef(data);
return SVN_NO_ERROR;
}
/**
* Implements svn_close_fn_t to close the output stream.
* @param baton an OutputStream object for the callback
* @return a subversion error or SVN_NO_ERROR
*/
svn_error_t *OutputStream::close(void *baton)
{
JNIEnv *env = JNIUtil::getEnv();
// An object of our class is passed in as the baton
OutputStream *that = (OutputStream*)baton;
// The method id will not change during the time this library is
// loaded, so it can be cached.
static jmethodID mid = 0;
if (mid == 0)
{
jclass clazz = env->FindClass("java/io/OutputStream");
if (JNIUtil::isJavaExceptionThrown())
return SVN_NO_ERROR;
mid = env->GetMethodID(clazz, "close", "()V");
if (JNIUtil::isJavaExceptionThrown() || mid == 0)
return SVN_NO_ERROR;
env->DeleteLocalRef(clazz);
}
// Call the Java object, to close the stream.
env->CallVoidMethod(that->m_jthis, mid);
// No need to check for exception here because we return anyway.
return SVN_NO_ERROR;
}