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.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:MultiGeometryBinding.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  2007/05/15 12:37:45  jorpiell

 * Add multyGeometries

 *

 *

 */

/**

 * It parses a MultyGeometry tag. Example:

 * <p>

 * <pre>

 * <code>

 * <MultiGeometry>

 * <Point gid="P6776">

 * <coord><X>50.0</X><Y>50.0</Y></coord>

 * </Point>

 * <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>

 * <MultiGeometry>

 * </code>

 * </pre>

 * </p>

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

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

 */

public class MultiGeometryBinding {

        /**

         * It parses the MultiGeometry tag

         * @param parser

         * The XML parser

         * @param handler

         * The GPE parser that contains the content handler and

         * the error handler

         * @return

         * A multigeometry

         * @throws XmlStreamException

         * @throws IOException

         */

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

                boolean endFeature = false;

                int currentTag;

                Object multiGeometry = null;

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

                //multiGeometry = handler.getContentHandler().startMultiGeometry(id, Kml2_1_Tags.DEFAULT_SRS);

                IQName tag = parser.getName();

                currentTag = parser.getEventType();

                while (!endFeature){

                        switch(currentTag){

                        case IXmlStreamReader.START_ELEMENT:

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

                                            if (multiGeometry == null){

                                                multiGeometry = handler.getContentHandler().startMultiPoint(id, Kml2_1_Tags.DEFAULT_SRS);

                                            }

                                            Object point = handler.getProfile().getPointTypeBinding().parse(parser, handler);

                                                handler.getContentHandler().addGeometryToMultiGeometry(point, multiGeometry);

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

                       if (multiGeometry == null){

                            multiGeometry = handler.getContentHandler().startMultiLineString(id, Kml2_1_Tags.DEFAULT_SRS);

                        }

                                                Object lineString = handler.getProfile().getLineStringTypeBinding().parse(parser, handler);

                                                handler.getContentHandler().addGeometryToMultiGeometry(lineString, multiGeometry);

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

                       if (multiGeometry == null){

                            multiGeometry = handler.getContentHandler().startMultiPolygon(id, Kml2_1_Tags.DEFAULT_SRS);

                        }

                                                Object polygon = handler.getProfile().getPolygonTypeBinding().parse(parser, handler);

                                                handler.getContentHandler().addGeometryToMultiGeometry(polygon, multiGeometry);

                                        }else{

                       if (multiGeometry == null){

                           multiGeometry = handler.getContentHandler().startMultiGeometry(id, Kml2_1_Tags.DEFAULT_SRS);

                        }

                                        }

                                        break;

                                case IXmlStreamReader.END_ELEMENT:

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

                                                endFeature = true;

                                                multiGeometry = handler.getContentHandler().endMultiGeometry(multiGeometry);

                                        }

                                        break;

                                case IXmlStreamReader.CHARACTERS:

                                        break;

                                }

                                if (!endFeature){

                                        currentTag = parser.next();

                                        tag = parser.getName();

                                }

                        }

                return multiGeometry;

        }

}