Application: gvSIG desktop » gvSIG data provider for GPE

package org.gvsig.gpe.prov.kml.parser.v21.geometries;

import java.io.IOException;

import org.gvsig.gpe.lib.api.parser.ICoordinateIterator;

import org.gvsig.gpe.prov.kml.parser.GPEDeafultKmlParser;

import org.gvsig.gpe.prov.kml.utils.Kml2_1_Tags;

import org.gvsig.xmlpull.lib.api.stream.IQName;

import org.gvsig.xmlpull.lib.api.stream.IXmlStreamReader;

import org.gvsig.xmlpull.lib.api.stream.XmlStreamException;

/* 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:PolygonTypeBinding.java 357 2008-01-09 17:50:08Z jpiera $

 * $Log$

 * Revision 1.2  2007/06/07 14:53:59  jorpiell

 * Add the schema support

 *

 * Revision 1.1  2007/05/11 07:06:29  jorpiell

 * Refactoring of some package names

 *

 * Revision 1.5  2007/05/08 08:22:37  jorpiell

 * Add comments to create javadocs

 *

 * Revision 1.4  2007/05/02 11:46:50  jorpiell

 * Writing tests updated

 *

 * Revision 1.3  2007/04/20 08:38:59  jorpiell

 * Tests updating

 *

 * Revision 1.2  2007/04/14 16:08:07  jorpiell

 * Kml writing support added

 *

 * Revision 1.1  2007/04/13 13:16:21  jorpiell

 * Add KML reading support

 *

 * Revision 1.1  2007/03/07 08:19:10  jorpiell

 * Pasadas las clases de KML de libGPE-GML a libGPE-KML

 *

 * Revision 1.1  2007/02/28 11:48:31  csanchez

 * *** empty log message ***

 *

 * Revision 1.1  2007/02/20 10:53:20  jorpiell

 * A?adidos los proyectos de kml y gml antiguos

 *

 * Revision 1.1  2007/02/12 13:49:18  jorpiell

 * A?adido el driver de KML

 *

 *

 */

/**

 * It writes a Polygon tag. Example:

 * <p>

 * <pre>

 * <code>

 * <Polygon gid="_877789">

 * <outerBoundaryIs>

 * <LinearRing>

 * <coordinates>0.0,0.0 100.0,0.0 50.0,100.0 0.0,0.0</coordinates>

 * </LinearRing>

 * </outerBoundaryIs>

 * </Polygon>

 * </code>

 * </pre>

 * </p> 

 * @author Jorge Piera LLodr? (jorge.piera@iver.es)

 * @see http://code.google.com/apis/kml/documentation/kml_tags_21.html#polygon

 */

public class PolygonTypeBinding {

        /**

         * It parses the Polygon tag

         * @param parser

         * The XML parser

         * @param handler

         * The GPE parser that contains the content handler and

         * the error handler

         * @return

         * A polygon

         * @throws IOException 

         * @throws XmlStreamException 

         * @throws XmlStreamException

         * @throws IOException

         */

        public Object parse(IXmlStreamReader parser,GPEDeafultKmlParser handler) throws XmlStreamException, IOException {

                boolean endFeature = false;

                int currentTag;                        

                Object polygon = null;

                String id = handler.getProfile().getGeometryBinding().getID(parser, handler);                

                IQName tag = parser.getName();

                currentTag = parser.getEventType();

                while (!endFeature){

                        switch(currentTag){

                        case IXmlStreamReader.START_ELEMENT:

                                if (handler.getQNameComparator().equals(tag,Kml2_1_Tags.OUTERBOUNDARYIS)){

                                        OuterBoundaryIsBinding coordinatesBinding = handler.getProfile().getOuterBoundaryIsBinding();

                                        ICoordinateIterator coordinatesIterator = coordinatesBinding.parse(parser, handler);

                                        polygon = handler.getContentHandler().startPolygon(id,

                                                        coordinatesIterator,

                                                        Kml2_1_Tags.DEFAULT_SRS);                                        

                                }else if (handler.getQNameComparator().equals(tag,Kml2_1_Tags.INNERBOUNDARYIS)){

                                        InnerBoundaryIsBinding innerPolygonBinding = handler.getProfile().getInnerBoundaryIsBinding();

                                        ICoordinateIterator coordinatesIterator = innerPolygonBinding.parse(parser, handler);

                                        Object innerPolygon = handler.getContentHandler().startInnerPolygon(id,

                                                        coordinatesIterator,

                                                        Kml2_1_Tags.DEFAULT_SRS);        

                                        handler.getContentHandler().endInnerPolygon(innerPolygon);

                                        handler.getContentHandler().addInnerPolygonToPolygon(innerPolygon,polygon);

                                }

                                break;

                        case IXmlStreamReader.END_ELEMENT:

                                if (handler.getQNameComparator().equals(tag,Kml2_1_Tags.POLYGON)){                                                

                                        endFeature = true;

                                        polygon = handler.getContentHandler().endPolygon(polygon);

                                }

                                break;

                        case IXmlStreamReader.CHARACTERS:                                        

                                break;

                        }

                        if (!endFeature){                                        

                                currentTag = parser.next();

                                tag = parser.getName();

                        }

                }        

                return polygon;

        }

}