org.codehaus.plexus.archiver.util.Compressor Maven / Gradle / Ivy
/**
*
* Copyright 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.
*/
package org.codehaus.plexus.archiver.util;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import org.codehaus.plexus.archiver.ArchiverException;
import org.codehaus.plexus.components.io.resources.PlexusIoResource;
import org.codehaus.plexus.logging.AbstractLogEnabled;
public abstract class Compressor
extends AbstractLogEnabled
{
private File destFile;
private PlexusIoResource source;
/**
* the required destination file.
*
* @param compressFile
*/
public void setDestFile( File compressFile )
{
this.destFile = compressFile;
}
public File getDestFile()
{
return destFile;
}
/**
* The resource to compress; required.
*/
public void setSource( PlexusIoResource source )
{
this.source = source;
}
/**
* The resource to compress; required.
*/
public PlexusIoResource getSource()
{
return source;
}
/**
* compress a stream to an output stream
*
* @param in
* @param zOut
*
* @throws IOException
*/
private void compressFile( InputStream in, OutputStream zOut )
throws IOException
{
byte[] buffer = new byte[ 8 * 1024 ];
int count = 0;
do
{
zOut.write( buffer, 0, count );
count = in.read( buffer, 0, buffer.length );
}
while ( count != -1 );
}
/**
* compress a resource to an output stream
*/
protected void compress( PlexusIoResource resource, OutputStream zOut )
throws IOException
{
try ( InputStream in = Streams.bufferedInputStream( resource.getContents() ) )
{
compressFile( in, zOut );
}
}
/**
* subclasses must implement this method to do their compression
*
* this is public so the process of compression and closing can be dealt with separately.
*/
public abstract void compress()
throws ArchiverException;
/**
* subclasses must implement this method to cleanup after compression
*
* this is public so the process of compression and closing can be dealt with separately.
*/
public abstract void close()
throws ArchiverException;
}