Application: gvSIG desktop

/**

 * gvSIG. Desktop Geographic Information System.

 *

 * Copyright (C) 2007-2013 gvSIG Association.

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 3

 * of the License, or (at your option) any later version.

 *

 * This program 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 General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,

 * MA  02110-1301, USA.

 *

 * For any additional information, do not hesitate to contact us

 * at info AT gvsig.com, or visit our website www.gvsig.com.

 */

package org.gvsig.tools.backup;

/* gvSIG. Geographic Information System of the Valencian Government

 *

 * Copyright (C) 2007-2008 Infrastructures and Transports Department

 * of the Valencian Government (CIT)

 * 

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 2

 * of the License, or (at your option) any later version.

 * 

 * This program 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 General Public License for more details.

 *  

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, 

 * MA  02110-1301, USA.

 * 

 */ 

import java.io.File;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.nio.channels.FileChannel;

import org.gvsig.tools.backup.exceptions.BackupException;

/**

 * <p>Performs a backup of a file, into another file at the same path (directory), with the file extension 

 *  changed to <i>.bak</i>.</p>

 *

 * @author Jose Ignacio Yarza (jiyarza@opensistemas.com)

 * @author Pablo Piqueras Bartolom? (pablo.piqueras@iver.es)

 */

public class DefaultBackupGenerator implements BackupGenerator {

        /*

         * (non-Javadoc)

         * @see com.iver.utiles.backup.BackupGenerator#backup(java.io.File)

         */

        public void backup(File source) throws BackupException {

                try {

                        int index = source.getAbsolutePath().lastIndexOf(".");

                        if (index == -1)

                                return;

                        File dest = new File(source.getAbsolutePath().substring(0, index) + ".bak");

                // Create channel on the source

                FileChannel srcChannel = new FileInputStream(source).getChannel();

                // Create channel on the destination

                FileChannel dstChannel = new FileOutputStream(dest).getChannel();

                // Copy file contents from source to destination

                dstChannel.transferFrom(srcChannel, 0, srcChannel.size());

                // Close the channels

                srcChannel.close();

                dstChannel.close();

            } catch (Exception ex) {

                    throw new BackupException(ex.getMessage(), ex, source);

            }

        }

}