Bzip2Uncompress.java Source code

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Here is the source code for Bzip2Uncompress.java

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/*
 * $Header: /home/cvspublic/jakarta-commons-sandbox/compress/src/test/org/apache/commons/compress/bzip2/example/Bzip2Uncompress.java,v 1.1 2003/12/02 20:44:24 dirkv Exp $
 * $Revision: 1.1 $
 * $Date: 2003/12/02 20:44:24 $
 *
 * ====================================================================
 *
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2002 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution, if
 *    any, must include the following acknowledgement:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgement may appear in the software itself,
 *    if and wherever such third-party acknowledgements normally appear.
 *
 * 4. The names "The Jakarta Project", "Commons", and "Apache Software
 *    Foundation" must not be used to endorse or promote products derived
 *    from this software without prior written permission. For written
 *    permission, please contact apache@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache"
 *    nor may "Apache" appear in their names without prior written
 *    permission of the Apache Software Foundation.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 *
 */

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import org.apache.commons.compress.compressors.bzip2.BZip2CompressorInputStream;

/**
 * This simple example shows how to use the Bzip2 classes to uncompress a file.
 *
 * @author <a href="mailto:peter@apache.org">Peter Donald</a>
 * @author <a href="mailto:nicolaken@apache.org">Nicola Ken Barozzi</a>
 * @version $Revision: 1.1 $ $Date: 2003/12/02 20:44:24 $
 */
public class Bzip2Uncompress {
    public static void main(final String[] args) {
        try {
            if (2 != args.length) {
                System.out.println("java Bzip2Uncompress <input> <output>");
                System.exit(1);
            }

            final File source = new File(args[0]);
            final File destination = new File(args[1]);
            final FileOutputStream output = new FileOutputStream(destination);
            final BZip2CompressorInputStream input = new BZip2CompressorInputStream(new FileInputStream(source));
            copy(input, output);
            input.close();
            output.close();
        } catch (Exception e) {
            e.printStackTrace();
            System.exit(1);
        }
    }

    /**
     * Copy bytes from an <code>InputStream</code> to an <code>OutputStream</code>.
     */
    private static void copy(final InputStream input, final OutputStream output) throws IOException {
        final byte[] buffer = new byte[8024];
        int n = 0;
        while (-1 != (n = input.read(buffer))) {
            output.write(buffer, 0, n);
        }
    }
}