Application: gvSIG desktop

/*

 * Created on 07-sep-2007

 *

 * 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.io.BufferedReader;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.InputStreamReader;

import java.io.OutputStreamWriter;

import java.util.Map;

import org.apache.log4j.Logger;

import org.exolab.castor.xml.Marshaller;

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

import com.iver.utiles.XMLEntity;

import com.iver.utiles.xml.XMLEncodingUtils;

import com.iver.utiles.xmlEntity.generate.XmlTag;

/**

 * Class with the responsability of persist topologies and their elements.

 */

public class TopologyPersister {

        public static final String FILE_PARAM_NAME = "file";

        public static final String DEFAULT_ENCODING = "UTF-8";

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

                        .getName());

        /**

         * Persist a topology to the specified file.

         * 

         * @param topology

         *            topology to persist

         * @param storageParams

         *            map with params to storage

         */

        public static void persist(Topology topology, Map<String, ?> storageParams) {

                try {

                        String fileName = (String) storageParams.get(FILE_PARAM_NAME);

                        File file = new File(fileName);

                        FileOutputStream fos = new FileOutputStream(file.getAbsolutePath());

                        OutputStreamWriter writer = new OutputStreamWriter(fos,

                                        DEFAULT_ENCODING);

                        Marshaller m = new Marshaller(writer);

                        m.setEncoding(DEFAULT_ENCODING);

                        XMLEntity xml = topology.getXMLEntity();

                        xml.putProperty("followHeaderEncoding", true, false);

                        m.marshal(xml.getXmlTag());

                } catch (Exception e) {

                        logger.error("error guardando la topologia " + topology.getName(),

                                        e);

                }

        }

        public static Topology load(MapContext mapContext, Map <String, ?> storageParams) {

                String fileName = (String) storageParams.get(FILE_PARAM_NAME);

                try {

                        File file = new File(fileName);

                        BufferedReader reader =null;

                        String encoding = XMLEncodingUtils.getEncoding(file);

                        FileInputStream stream = new FileInputStream(file);

                        reader = new BufferedReader(new InputStreamReader(stream, encoding));

                        XmlTag tag = (XmlTag) XmlTag.unmarshal(reader);

                        XMLEntity xml=new XMLEntity(tag);

                        return Topology.createFromXML(mapContext, xml);

                } catch(Exception e) {

                        logger.error("Error cargando la topologia del recurso "+fileName, e);

                } 

                return null;

        }

        public static ITopologyErrorContainer createErrorContainerFromXML(

                        XMLEntity xml) {

                ITopologyErrorContainer solution = null;

                String className = null;

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

                        className = xml.getStringProperty("className");

                        Class clazz = null;

                        ITopologyErrorContainer obj = null;

                        try {

                                clazz = Class.forName(className);

                                obj = (ITopologyErrorContainer) clazz.newInstance();

                                obj.setXMLEntity(xml);

                        } catch (Exception e) {

                                logger.error(e);

                        }

                } else {

                        return null;

                }

                return solution;

        }

}