/*
* 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.
*/
package org.apache.commons.vfs.util;
import java.io.BufferedOutputStream;
import java.io.IOException;
import java.io.OutputStream;
/**
* An OutputStream that provides buffering and end-of-stream monitoring.
*
* @author <a href="mailto:adammurdoch@apache.org">Adam Murdoch</a>
* @version $Revision: 480428 $ $Date: 2006-11-29 07:15:24 +0100 (Mi, 29 Nov 2006) $
*/
public class MonitorOutputStream
extends BufferedOutputStream
{
private boolean finished;
public MonitorOutputStream(final OutputStream out)
{
super(out);
}
/**
* Closes this output stream.
*/
public void close() throws IOException
{
if (finished)
{
return;
}
// Close the output stream
IOException exc = null;
try
{
super.close();
}
catch (final IOException ioe)
{
exc = ioe;
}
// Notify of end of output
try
{
onClose();
}
catch (final IOException ioe)
{
exc = ioe;
}
finished = true;
if (exc != null)
{
throw exc;
}
}
/**
* Called after this stream is closed. This implementation does nothing.
*/
protected void onClose() throws IOException
{
}
}