/*
* $Id$
*
* Copyright (C) 2003-2014 JNode.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
* (at your option) 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
package org.jnode.driver.block;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.jar.JarFile;
import org.jnode.fs.ReadOnlyFileSystemException;
/**
* This class is a device that wraps a JarFile
*
* @author epr
*/
public class JarFileDevice extends FileDevice implements FSBlockDeviceAPI {
private JarFile jarFile;
/**
* Create a new JarFileDevice
*
* @param file
* @param mode
* @throws FileNotFoundException
* @throws IOException
*/
public JarFileDevice(File file, String mode) throws FileNotFoundException, IOException {
super(file, mode);
jarFile = new JarFile(file);
}
/**
* Returns the JarFile wraped by this device
*
* @return the wraped JarFile
*/
public JarFile getJarFile() {
return jarFile;
}
/**
* This method allways throws an Exception, since the JarFileSystem is not writable.
*
* @see org.jnode.driver.block.FileDevice#write(long, java.nio.ByteBuffer)
*/
public void write(long devOffset, ByteBuffer srcBuf) throws IOException {
throw new ReadOnlyFileSystemException("jar file systems are not writeable");
}
/**
* This method allways throws an Exception, since the JarFileSystem is not writable.
*
* @see org.jnode.driver.block.FileDevice#setLength(long)
*/
public void setLength(long length) throws IOException {
throw new ReadOnlyFileSystemException("jar file systems are not writeable");
}
}