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.version.sld1_0_0.symbolizers;

import java.io.IOException;

import org.gvsig.sldsupport.exception.SLDReadException;

import org.gvsig.sldsupport.symbolizer.SLDPointSymbolizer;

import org.gvsig.sldsupport.util.SLDTags;

import org.gvsig.sldsupport.util.XmlBuilder;

import org.gvsig.sldsupport.version.sld1_0_0.SLDGraphic1_0_0;

import org.xmlpull.v1.XmlPullParser;

import org.xmlpull.v1.XmlPullParserException;

/**

 *  * Implements the Point Symbolizer element of an SLD implementation specification (version 

 * 1.0.0).<p>

 * 

 * A point symbolizer is used to draw "graphic" at a point.

 * 

 * @see SLDGraphic1_0_0

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

 * 

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

 */

public class SLDPointSymbolizer1_0_0 extends SLDPointSymbolizer {

        /**

         * Parses the xml data retrieved from the SLD, it will parse the Point Symbolizer

         *  element</p>

         * @throws SLDReadException 

         */

        public void parse(XmlPullParser parser)throws IOException, XmlPullParserException, SLDReadException  {

                int currentTag;

                boolean end = false;

                parser.require(XmlPullParser.START_TAG, null, SLDTags.POINTSYMBOLIZER);

                currentTag = parser.next();

                while (!end)

                {

                        switch(currentTag)

                        {

                        case XmlPullParser.START_TAG:

                                if (parser.getName().compareTo(SLDTags.GEOMETRY)==0) {

                                        parseGeometry(parser);

                                }

                                else if (parser.getName().compareTo(SLDTags.GRAPHIC)==0) {

                                        SLDGraphic1_0_0 graphic = new SLDGraphic1_0_0();

                                        graphic.parseGraphic(parser,parser.getName());

                                        setGraphic(graphic);

                                }

                                break;

                        case XmlPullParser.END_TAG:

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

                                        end = true;

                                break;

                        case XmlPullParser.TEXT:

                                break;

                        }

                        if (!end)

                                currentTag = parser.next();

                }

                parser.require(XmlPullParser.END_TAG, null, SLDTags.POINTSYMBOLIZER);

        }

        /**

         * Parse the xml data retrieved from the SLD, it will parse the Geometry element</p>

         * The Geometry element of a Symbolizer defines the geometry to be used

         * for styling. The Geometry element is optional and if it is absent then the

         * �default� geometry property of the feature type that is used in the containing 

         * FeatureStyleType is used. The precise meaning of �default� geometry property is

         * system-dependent. Most frequently, feature types will have only a single geometry

         * property.<p>

         * The only method available for defining a geometry is to reference a geometry 

         * property using the ogc:PropertyName element (defined in the WFS Specification). 

         * The content of the element gives the property name in XPath syntax. In principle, 

         * a fixed geometry could be defined using GML or operators could be defined for 

         * computing the geometry from references or literals. However, using a feature 

         * property directly is by far the most commonly useful method.

         *

         */

        private void parseGeometry(XmlPullParser parser) throws IOException, XmlPullParserException{

                int currentTag;

                boolean end = false;

                parser.require(XmlPullParser.START_TAG, null, SLDTags.GEOMETRY);

                currentTag = parser.next();

                while (!end)

                {

                        switch(currentTag)

                        {

                        case XmlPullParser.START_TAG:

                                if (parser.getName().compareTo(SLDTags.PROPERTY_NAME)==0) {

                                        setGeometry(parser.nextText());

                                }

                                break;

                        case XmlPullParser.END_TAG:

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

                                        end = true;

                                break;

                        case XmlPullParser.TEXT:

                                break;

                        }

                        if (!end)

                                currentTag = parser.next();

                }

                parser.require(XmlPullParser.END_TAG, null, SLDTags.GEOMETRY);

        }

        public String toXML() {

                XmlBuilder xmlBuilder = new XmlBuilder();

                xmlBuilder.openTag(SLDTags.POINTSYMBOLIZER);

                xmlBuilder.writeRaw(getGraphic().toXML());

                xmlBuilder.closeTag();

                return xmlBuilder.getXML();

        }

}