Application: gvSIG desktop

/* 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

 */

package org.gvsig.sldsupport.impl.sld1_0_0.handler;

import java.io.File;

import java.io.FileReader;

import java.io.IOException;

import org.gvsig.sldsupport.exception.SLDReadException;

import org.gvsig.sldsupport.handler.SLDProtocolHandler;

import org.gvsig.sldsupport.impl.parser.ExtendedKXmlParser;

import org.gvsig.sldsupport.impl.sld1_0_0.layers.SLDNamedLayer1_0_0;

import org.gvsig.sldsupport.impl.sld1_0_0.layers.SLDUserLayer1_0_0;

import org.gvsig.sldsupport.util.SLDTags;

import org.kxml2.io.KXmlParser;

import org.xmlpull.v1.XmlPullParser;

import org.xmlpull.v1.XmlPullParserException;

/**

 * Implements the main class for the SLD implementation specification (version 1.0.0)

 * which starts the parsing of the styled layer descriptor document in order to store

 * all the information that it has inside and transform it into objects.<p>

 * 

 * An SLD document is defined as a sequence of styled layers.<p>

 * The version attribute gives the SLD version an SLD document, to facilitate backward

 * compatibility with static documents stored in various different versions of an SLD

 * spec.<p>

 * 

 * The Styled layers can correspond to either named layers or user-defined layers,

 * which are described in subsequent sections. There may be any number of either type

 * of styled layer, including zero, mixed in any order.

 * 

 * @see http://portal.opengeospatial.org/files/?artifact_id=1188

 * 

 * @author pepe vidal salvador - jose.vidal.salvador@iver.es

 */

public class SLDProtocolHandler1_0_0 extends SLDProtocolHandler {

        public SLDProtocolHandler1_0_0(){

                setVersion("1.0.0");

        }

        public void parse(File f)

                        throws XmlPullParserException, IOException, SLDReadException {

                int tag;

                XmlPullParser parser = new ExtendedKXmlParser();

                FileReader fr = new FileReader(f);

                parser.setInput(fr);

                parser.nextTag();

                if ( parser.getEventType() != XmlPullParser.END_DOCUMENT ) {

                        String value = parser.getAttributeValue("",SLDTags.VERSION_ATTR);

                        setVersion(value);

                        parser.require(KXmlParser.START_TAG, null, SLDTags.SLD_ROOT);                            

                        tag = parser.nextTag();

                        while(tag != KXmlParser.END_DOCUMENT){

                                switch(tag){

                                case KXmlParser.START_TAG:

                                        if (parser.getName().compareTo(SLDTags.USERDEFINEDLAYER)==0)

                                        {

                                                SLDUserLayer1_0_0 lyr = new SLDUserLayer1_0_0();

                                                lyr.parse(parser);

                                                if (lyr.getName()!= null && lyr.getName()!="")

                                                        layers.add(lyr);

                                                else throw new SLDReadException(new Exception(

                                                                "Invalid or empty SLD layer user name"));

                                        }        

                                        else if(parser.getName().compareTo(SLDTags.NAMEDLAYER)==0)

                                        {

                                                SLDNamedLayer1_0_0 lyr = new SLDNamedLayer1_0_0();

                                                lyr.parse(parser);

                                                if (lyr.getName()!= null && lyr.getName()!="")

                                                        layers.add(lyr);

                                                else throw new SLDReadException(new Exception(

                                                                "Invalid or empty SLD layer name"));

                                        }        

                                        break;

                                case KXmlParser.END_TAG:                                                        

                                        break;

                                case KXmlParser.TEXT:

                                        break;

                                }        

                                tag = parser.next();

                        }

                        parser.require(KXmlParser.END_DOCUMENT, null, null);

                }

        }        

}