Application: gvSIG desktop

/* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana

 *

 * Copyright (C) 2007 IVER T.I. and Generalitat Valenciana.

 *

 * 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307,USA.

 */

package org.gvsig.rastertools.georeferencing.ui.zoom;

import java.util.ArrayList;

/**

 * Historial de peticiones para poder recuperar las anteriores a 

 * la actual.

 * 

 * 11/01/2008

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

 */

public class ZoomRecord {

        private ArrayList  record = new ArrayList();

        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) {

                        return record.get(pos --);

                } else if(pos == 0)

                        return record.get(pos);

                return null;

        }

        /**

         * Vacia el historial

         */

        public void clear() {

                record.clear();

        }

}