Unpack.java

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 1997-2010 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
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 * exception as provided by Oracle in the GPL Version 2 section of the License
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 *
 * Modifications:
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 * enclosed by brackets [] replaced by your own identifying information:
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 */

package org.glassfish.installer.util;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.util.jar.JarOutputStream;
import java.util.jar.Pack200;
import java.util.logging.Level;
import java.util.zip.GZIPInputStream;
import java.util.logging.Logger;
import org.openinstaller.util.ClassUtils;

/**
 *
 * @author sathyan
 */
public class Unpack {

    public File unpackSrcDir;
    public File unpackTgtDir;
    private static final Logger LOGGER;

    static {
        LOGGER = Logger.getLogger(ClassUtils.getClassName());
    }

    public Unpack(File unpackSrcDir, File unpackTgtDir) {
        this.unpackSrcDir = unpackSrcDir;
        this.unpackTgtDir = unpackTgtDir;
    }

    // CONVERT THIS TO A MULTI-THREADED METHOD TO SPEED UP DECOMPRESSION.
    public boolean unpackJars() {
        boolean retStatus = true;
        Pack200.Unpacker unpacker = Pack200.newUnpacker();

        File[] fileList =
                unpackSrcDir.listFiles(new InstallFileFilter(".pack.gz"));

        for (File unpackedSrcFileName : fileList) {

            String unpackedTgtFileName =
                    unpackTgtDir + File.separator
                    + unpackedSrcFileName.getName().substring(0,
                    unpackedSrcFileName.getName().length() - 8)
                    + ".jar";
            LOGGER.log(Level.INFO, "Uncompressing " + unpackedSrcFileName + " To " + unpackedTgtFileName);
            try {
                FileOutputStream fos = new FileOutputStream(unpackedTgtFileName);
                JarOutputStream jos = new JarOutputStream(
                        new BufferedOutputStream(fos));
                FileInputStream fis = new FileInputStream(unpackedSrcFileName);
                InputStream is = new BufferedInputStream(new GZIPInputStream(fis));
                unpacker.unpack(is, jos);
                fis.close();
                jos.close();
                unpackedSrcFileName.delete();

            } catch (Exception e) {
                // LOG THIS
                LOGGER.log(Level.INFO, "Error Uncompressing " + ExceptionUtil.getRootCause(e));
                retStatus = false;
            }
        }
        return retStatus;

    }
    /* Test Code */
    /*
    public static void main(String args[]) {
    Unpack uPack = new Unpack(
    new File("/Users/sathyan/unpackdir/src"),
    new File("/Users/sathyan/unpackdir/output"));

    uPack.unpackJars();
    }
     */
}