/*
* 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.ivy.core.pack;
import java.io.BufferedInputStream;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.jar.JarOutputStream;
import java.util.jar.Pack200;
import java.util.jar.Pack200.Unpacker;
import java.util.zip.GZIPInputStream;
public class Pack200Packing extends StreamPacking {
private static final String[] NAMES = {"pack200"};
@Override
public String[] getNames() {
return NAMES;
}
@Override
public String getUnpackedExtension(String ext) {
if (ext.endsWith("pack.gz")) {
ext = ext.substring(0, ext.length() - 7);
if (ext.endsWith(".")) {
ext = ext.substring(0, ext.length() - 1);
}
} else if (ext.endsWith("pack")) {
ext = ext.substring(0, ext.length() - 4);
if (ext.endsWith(".")) {
ext = ext.substring(0, ext.length() - 1);
}
}
return ext;
}
@Override
public InputStream unpack(InputStream packed) throws IOException {
BufferedInputStream buffered = new BufferedInputStream(packed);
buffered.mark(4);
byte[] magic = new byte[4];
buffered.read(magic, 0, 4);
buffered.reset();
InputStream in = buffered;
if (magic[0] == (byte) 0x1F && magic[1] == (byte) 0x8B && magic[2] == (byte) 0x08) {
// this is a gziped pack200
in = new GZIPInputStream(in);
}
Unpacker unpacker = Pack200.newUnpacker();
ByteArrayOutputStream baos = new ByteArrayOutputStream();
JarOutputStream jar = new JarOutputStream(baos);
unpacker.unpack(in, jar);
jar.close();
return new ByteArrayInputStream(baos.toByteArray());
}
}