com.izforge.izpack.installer.unpacker.Pack200FileUnpacker Maven / Gradle / Ivy
/*
* IzPack - Copyright 2001-2012 Julien Ponge, All Rights Reserved.
*
* http://izpack.org/
* http://izpack.codehaus.org/
*
* Copyright 2012 Tim Anderson
*
* 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 com.izforge.izpack.installer.unpacker;
import com.izforge.izpack.api.data.PackFile;
import com.izforge.izpack.api.exception.InstallerException;
import com.izforge.izpack.util.os.FileQueue;
import org.apache.commons.io.IOUtils;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.util.Map;
import java.util.jar.JarOutputStream;
import java.util.jar.Pack200;
/**
* A file unpacker for pack200 files.
*
* @author Tim Anderson
*/
class Pack200FileUnpacker extends FileUnpacker
{
/**
* Constructs a Pack200FileUnpacker.
*
* @param cancellable determines if unpacking should be cancelled
* @param resources the pack resources
* @param queue the file queue. May be {@code null}
*/
public Pack200FileUnpacker(Cancellable cancellable, PackResources resources, FileQueue queue)
{
super(cancellable, queue);
}
/**
* Unpacks a pack packFile.
*
* @param packFile the pack packFile meta-data
* @param packInputStream the pack input stream
* @param target the target
* @throws IOException for any I/O error
* @throws InstallerException for any installer exception
*/
@Override
public void unpack(PackFile packFile, InputStream packInputStream, File target)
throws IOException, InstallerException
{
InputStream in = IOUtils.buffer(packInputStream);
JarOutputStream jarOut = null;
try
{
jarOut = new JarOutputStream(getTarget(packFile, target));
Pack200.Unpacker unpacker = createPack200Unpacker(packFile);
unpacker.unpack(in, jarOut);
}
finally
{
IOUtils.closeQuietly(jarOut);
IOUtils.closeQuietly(in);
}
postCopy(packFile);
}
private Pack200.Unpacker createPack200Unpacker(PackFile packFile)
{
Pack200.Unpacker unpacker = Pack200.newUnpacker();
Map defaultUnpackerProperties = unpacker.properties();
Map localPackerProperties = packFile.getPack200Properties();
if (localPackerProperties != null)
{
defaultUnpackerProperties.putAll(localPackerProperties);
}
return unpacker;
}
}