Application: gvSIG desktop

/*

 * Created on 10-abr-2006

 *

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

 *

 * Copyright (C) 2004 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.

 *

 * For more information, contact:

 *

 *  Generalitat Valenciana

 *   Conselleria d'Infraestructures i Transport

 *   Av. Blasco Ib??ez, 50

 *   46010 VALENCIA

 *   SPAIN

 *

 *      +34 963862235

 *   gvsig@gva.es

 *      www.gvsig.gva.es

 *

 *    or

 *

 *   IVER T.I. S.A

 *   Salamanca 50

 *   46005 Valencia

 *   Spain

 *

 *   +34 963163400

 *   dac@iver.es

 */

/* CVS MESSAGES:

 *

 * $Id: 

 * $Log: 

 */

package org.gvsig.topology;

import java.util.Map;

import org.apache.log4j.Logger;

import com.iver.cit.gvsig.fmap.Messages;

import com.iver.cit.gvsig.fmap.layers.FLyrVect;

import com.iver.utiles.NotExistInXMLEntity;

import com.iver.utiles.XMLEntity;

/**

 * Factory to create ITopologyRule implementations.

 * 

 * @author Alvaro Zabala

 * 

 */

public class TopologyRuleFactory {

        private static Logger logger = Logger.getLogger(TopologyRuleFactory.class

                        .getName());

        public static ITopologyRule createFromXML(Topology ownerOfRule,

                        XMLEntity xml) {

                String className = null;

                try {

                        className = xml.getStringProperty("className");

                } catch (NotExistInXMLEntity e) {

                        logger.error("Class name not set.\n"

                                        + " Maybe you forgot to add the"

                                        + " putProperty(\"className\", yourClassName)"

                                        + " call in the getXMLEntity method of your class", e);

                        return null;

                }

                Class clazz = null;

                IOneLyrRule obj = null;

                String s = className;

                try {

                        clazz = Class.forName(className);

                        if (xml.contains("desc")) {

                                s += " \"" + xml.getStringProperty("desc") + "\"";

                        }

                        obj = (IOneLyrRule) clazz.newInstance();

                        logger.info(Messages.getString("creating") + "....... " + s);

                        try {

                                obj.setTopology(ownerOfRule);

                                obj.setXMLEntity(xml);

                                if(obj.getOriginLyr() == null)

                                        throw new TopologyRuleDefinitionException("Regla topologica sin capa de origen");

                                if(obj instanceof ITwoLyrRule){

                                        if(((ITwoLyrRule)obj).getDestinationLyr() == null){

                                                throw new TopologyRuleDefinitionException("Regla que aplica a dos capas no ha especificado la segunda capa");

                                        }

                                }

                        } catch (NotExistInXMLEntity neiXML) {

                                logger.error(Messages.getString("failed_creating_object")

                                                + ": " + s);

                                throw neiXML;

                        }

                } catch (Exception e) {

                        logger.error(e);

                }

                return (ITopologyRule) obj;

        }

        public static ITopologyRule createRule(Class<?> ruleClass, 

                                                                                Map<String, Object> params, 

                                                                        Topology ruleOwner) throws TopologyRuleDefinitionException{

                try{        

                        ITopologyRule rule = (ITopologyRule) ruleClass.newInstance();

                        FLyrVect originLyr = (FLyrVect) params.get("originLyr");

                        if(originLyr == null)

                                throw new TopologyRuleDefinitionException("Regla topologica sin capa de origen");

                        ((IOneLyrRule)rule).setOriginLyr(originLyr);

                        if (ruleClass.isAssignableFrom(ITwoLyrRule.class)){

                                FLyrVect destinationLyr = (FLyrVect) params.get("destinationLyr");

                                if(destinationLyr == null)

                                        throw new TopologyRuleDefinitionException("Regla que aplica a dos capas no ha especificado la segunda capa");

                                ((ITwoLyrRule)rule).setDestinationLyr(destinationLyr);

                        }        

                        return rule;

                } catch (InstantiationException e) {

                        throw new TopologyRuleDefinitionException(

                                        "Error construyendo la regla topologica", e);

                } catch (IllegalAccessException e) {

                        throw new TopologyRuleDefinitionException(

                                        "Error construyendo la regla topologica", e);

                }//catch

        }

}