JJarFile.java

/*
 * JOnAS: Java(TM) Open Application Server
 * Copyright (C) 1999 Bull S.A.
 * Contact: jonas-team@objectweb.org
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or any later version.
 * 
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
 * USA
 *
 * Initial developer(s): Eric HARDESTY
 * --------------------------------------------------------------------------
 * $Id: JJarFile.java,v 1.0
 * --------------------------------------------------------------------------
 */


package org.objectweb.jonas.common;

import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.IOException;
import java.util.jar.JarFile;
import java.util.jar.JarEntry;

public class JJarFile extends JarFile {

    private static final int BUFFER_SIZE = 2048;

    public JJarFile(File file) throws IOException {
        super(file);
    }    

    public JJarFile(File file, boolean verify) throws IOException {
        super(file, verify);
    }    

    public JJarFile(File file, boolean verify, int mode) throws IOException {
        super(file, verify, mode);
    }    

    public JJarFile(String name) throws IOException {
        super(name);
    }    

    public JJarFile(String name, boolean verify) throws IOException {
        super(name, verify);
    }    

    public void extract(JarEntry jEnt, String filename) throws IOException {
        
        try {
            //File output
            FileOutputStream out = new FileOutputStream(filename);
            InputStream jis = this.getInputStream(jEnt);
            int n = 0;
            try {
                //buffer
                byte buffer[] = new byte[BUFFER_SIZE];
  
                while ((n = jis.read(buffer)) > 0) {
                    out.write(buffer, 0, n);
                }
            } finally {
                out.close();
                jis.close();
            }
        } catch (IOException e) {
            throw new IOException("Error while uncompressing the file " +  filename + ": " + e.getMessage());
        }

    }

}

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