Application: gvSIG desktop » gvSIG raster

/* 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.

 *

 */

package org.gvsig.raster.georeferencing.swing.impl.view;

import java.util.ArrayList;

import java.util.List;

/**

 * Historial de peticiones para poder recuperar las anteriores a 

 * la actual.

 * 

 * 11/01/2008

 * @author Nacho Brodin (nachobrodin@gmail.com)

 */

public class ViewRecord {

        private List<Object>    record = new ArrayList<Object>();

        private int             pos    = -1;

        /**

         * Asigna la petici?n siguiente

         * @param request

         */

        public void setRequest(Object request) {

                record.add(++ pos, request);

        }

        /**

         * Obtiene la petici?n anterior

         * @return

         */

        public Object getRequest() {

                if(pos > 0) {

                        pos --;

                        return record.get(pos);

                } else if(pos == 0)

                        return record.get(pos);

                return null;

        }

        /**

         * Vacia el historial

         */

        public void clear() {

                record.clear();

        }

}