Pack200UnpackerAdapter.java
/*
* 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.compress.harmony.unpack200;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.nio.file.Files;
import java.util.jar.JarOutputStream;
import org.apache.commons.compress.harmony.pack200.Pack200Adapter;
import org.apache.commons.compress.harmony.pack200.Pack200Exception;
import org.apache.commons.compress.java.util.jar.Pack200.Unpacker;
/**
* This class provides the binding between the standard Pack200 interface and the internal interface for (un)packing. As this uses generics for the SortedMap,
* this class must be compiled and run on a Java 1.5 system. However, Java 1.5 is not necessary to use the internal libraries for unpacking.
*/
public class Pack200UnpackerAdapter extends Pack200Adapter implements Unpacker {
/*
* (non-Javadoc)
*
* @see org.apache.commons.compress.java.util.jar.Pack200.Unpacker#unpack(java.io.File, java.util.jar.JarOutputStream)
*/
@Override
public void unpack(final File file, final JarOutputStream out) throws IOException {
if (file == null || out == null) {
throw new IllegalArgumentException("Must specify both input and output streams");
}
final int size = (int) file.length();
final int bufferSize = size > 0 && size < DEFAULT_BUFFER_SIZE ? size : DEFAULT_BUFFER_SIZE;
try (InputStream in = new BufferedInputStream(Files.newInputStream(file.toPath()), bufferSize)) {
unpack(in, out);
}
}
/*
* (non-Javadoc)
*
* @see org.apache.commons.compress.java.util.jar.Pack200.Unpacker#unpack(java.io.InputStream, java.util.jar.JarOutputStream)
*/
@Override
public void unpack(final InputStream in, final JarOutputStream out) throws IOException {
if (in == null || out == null) {
throw new IllegalArgumentException("Must specify both input and output streams");
}
completed(0);
try {
new Archive(in, out).unpack();
} catch (final Pack200Exception e) {
throw new IOException("Failed to unpack Jar:" + e);
}
completed(1);
}
}