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/***

 * ASM: a very small and fast Java bytecode manipulation framework

 * Copyright (c) 2000-2005 INRIA, France Telecom

 * 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. Neither the name of the copyright holders nor the names of its

 *    contributors may be used to endorse or promote products derived from

 *    this software without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

 * AND ANY EXPRESS 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 COPYRIGHT OWNER OR 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.

 */

package org.objectweb.asm.optimizer;

import java.io.File;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.util.Enumeration;

import java.util.zip.ZipEntry;

import java.util.zip.ZipFile;

import java.util.zip.ZipOutputStream;

/**

 * A Jar file optimizer.

 *

 * @author Eric Bruneton

 */

public class JarOptimizer {

    public static void main(final String[] args) throws IOException {

        File f = new File(args[0]);

        optimize(f);

    }

    static void optimize(final File f) throws IOException {

        if (f.isDirectory()) {

            File[] files = f.listFiles();

            for (int i = 0; i < files.length; ++i) {

                optimize(files[i]);

            }

        } else if (f.getName().endsWith(".jar")) {

            File g = new File(f.getParentFile(), f.getName() + ".new");

            ZipFile zf = new ZipFile(f);

            ZipOutputStream out = new ZipOutputStream(new FileOutputStream(g));

            Enumeration e = zf.entries();

            byte[] buf = new byte[10000];

            while (e.hasMoreElements()) {

                ZipEntry ze = (ZipEntry) e.nextElement();

                if (ze.isDirectory()) {

                    continue;

                }

                out.putNextEntry(ze);

                InputStream is = zf.getInputStream(ze);

                int n;

                do {

                    n = is.read(buf, 0, buf.length);

                    if (n != -1) {

                        out.write(buf, 0, n);

                    }

                } while (n != -1);

                out.closeEntry();

            }

            out.close();

            zf.close();

            f.delete();

            g.renameTo(f);

        }

    }

}