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package org.codehaus.plexus.util.cli;
/*
* Copyright The Codehaus Foundation.
*
* 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.
*/
/********************************************************************************
* CruiseControl, a Continuous Integration Toolkit
* Copyright (c) 2001-2003, ThoughtWorks, Inc.
* 651 W Washington Ave. Suite 500
* Chicago, IL 60661 USA
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* + Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* + Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
*
* + Neither the name of ThoughtWorks, Inc., CruiseControl, nor the
* names of its contributors may be used to endorse or promote
* products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
********************************************************************************/
/* ====================================================================
* Copyright 2003-2004 The Apache Software Foundation.
*
* 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.
* ====================================================================
*/
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PrintWriter;
/**
* Class to pump the error stream during Process's runtime. Copied from the Ant built-in task.
*
* @author Florin Vancea
* @author Paul Julius
*
* @since June 11, 2001
*/
public class StreamPumper
extends AbstractStreamHandler
{
private final BufferedReader in;
private final StreamConsumer consumer;
private final PrintWriter out;
private volatile Exception exception = null;
private static final int SIZE = 1024;
public StreamPumper( InputStream in )
{
this( in, (StreamConsumer) null );
}
public StreamPumper( InputStream in, StreamConsumer consumer )
{
this( in, null, consumer );
}
public StreamPumper( InputStream in, PrintWriter writer )
{
this( in, writer, null );
}
public StreamPumper( InputStream in, PrintWriter writer, StreamConsumer consumer )
{
super();
this.in = new BufferedReader( new InputStreamReader( in ), SIZE );
this.out = writer;
this.consumer = consumer;
}
@Override
public void run()
{
boolean outError = out != null ? out.checkError() : false;
try
{
for ( String line = in.readLine(); line != null; line = in.readLine() )
{
try
{
if ( exception == null && consumer != null && !isDisabled() )
{
consumer.consumeLine( line );
}
}
catch ( Exception t )
{
exception = t;
}
if ( out != null && !outError )
{
out.println( line );
out.flush();
if ( out.checkError() )
{
outError = true;
try
{
// Thrown to fill in stack trace elements.
throw new IOException( String.format( "Failure printing line '%s'.", line ) );
}
catch ( final IOException e )
{
exception = e;
}
}
}
}
}
catch ( IOException e )
{
exception = e;
}
finally
{
try
{
in.close();
}
catch ( final IOException e2 )
{
if ( exception == null )
{
exception = e2;
}
}
synchronized ( this )
{
setDone();
this.notifyAll();
}
}
}
public void flush()
{
if ( out != null )
{
out.flush();
if ( out.checkError() && exception == null )
{
try
{
// Thrown to fill in stack trace elements.
throw new IOException( "Failure flushing output." );
}
catch ( final IOException e )
{
exception = e;
}
}
}
}
public void close()
{
if ( out != null )
{
out.close();
if ( out.checkError() && exception == null )
{
try
{
// Thrown to fill in stack trace elements.
throw new IOException( "Failure closing output." );
}
catch ( final IOException e )
{
exception = e;
}
}
}
}
public Exception getException()
{
return exception;
}
}
