/*
 * $Id$
 *
 * Copyright (C) 2003-2015 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.apps.vmware.disk;

import java.io.File;
import java.io.IOException;
import java.nio.ByteBuffer;
import org.apache.log4j.Logger;
import org.jnode.apps.vmware.disk.descriptor.Descriptor;
import org.jnode.apps.vmware.disk.handler.ExtentFactory;
import org.jnode.apps.vmware.disk.handler.FileDescriptor;
import org.jnode.apps.vmware.disk.handler.IOHandler;
import org.jnode.apps.vmware.disk.handler.UnsupportedFormatException;

/**
 * Wrote from the 'Virtual Disk Format 1.0' specifications (from VMWare).
 * 
 * @author Fabien DUMINY (fduminy at jnode dot org)
 * 
 */
public class VMWareDisk {
    private static final Logger LOG = Logger.getLogger(VMWareDisk.class);

    private final Descriptor descriptor;
    private final IOHandler handler;

    private final long length;

    /**
     * 
     * @param file
     * @throws IOException
     * @throws UnsupportedFormatException
     */
    public VMWareDisk(File file) throws IOException, UnsupportedFormatException {
        FileDescriptor fd = IOUtils.readFileDescriptor(file);

        ExtentFactory factory = fd.getExtentFactory();

        this.handler = factory.createIOHandler(fd);
        this.descriptor = fd.getDescriptor();

        this.length = handler.getNbSectors() * IOHandler.SECTOR_SIZE;
        LOG.debug("handler for file " + file.getName() + " : " + handler.getClass().getName());
    }

    /**
     * 
     * @param sector
     * @param data
     * @throws IOException
     */
    public void write(long sector, ByteBuffer data) throws IOException {
        handler.write(sector, data);
    }

    /**
     * 
     * @param sector
     * @param data
     * @throws IOException
     */
    public void read(long sector, ByteBuffer data) throws IOException {
        handler.read(sector, data);
    }

    /**
     * 
     * @throws IOException
     */
    public void flush() throws IOException {
        handler.flush();
    }

    /**
     * 
     * @return
     */
    public long getLength() {
        return length;
    }

    /**
     * 
     * @return
     */
    public Descriptor getDescriptor() {
        return descriptor;
    }

}