/*
* 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.harmony.pack200;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.jar.JarOutputStream;
import java.util.jar.Pack200.Unpacker;
import org.apache.harmony.pack200.Pack200Exception;
import org.apache.harmony.pack200.Segment;
/**
* 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 java.util.jar.Pack200.Unpacker#unpack(java.io.InputStream,
* java.util.jar.JarOutputStream)
*/
public void unpack(InputStream in, JarOutputStream out) throws IOException {
if (in == null || out == null)
throw new IllegalArgumentException(
"Must specify both input and output streams");
completed(0);
try {
while (in.available() > 0) {
Segment s = Segment.parse(in);
s.writeJar(out, in);
out.flush();
}
} catch (Pack200Exception e) {
throw new IOException("Failed to unpack Jar:" + String.valueOf(e));
}
completed(1);
in.close();
}
/*
* (non-Javadoc)
*
* @see java.util.jar.Pack200.Unpacker#unpack(java.io.File,
* java.util.jar.JarOutputStream)
*/
public void unpack(File file, JarOutputStream out) throws IOException {
if (file == null || out == null)
throw new IllegalArgumentException(
"Must specify both input and output streams");
int size = (int) file.length();
int bufferSize = (size > 0 && size < DEFAULT_BUFFER_SIZE ? size
: DEFAULT_BUFFER_SIZE);
InputStream in = new BufferedInputStream(new FileInputStream(file),
bufferSize);
unpack(in, out);
}
}