Application: gvSIG desktop » gvSIG data provider for GPE

package org.gvsig.gpe.prov.gml.parser.v2.geometries;

import java.io.IOException;

import org.gvsig.gpe.prov.gml.parser.GPEDefaultGmlParser;

import org.gvsig.gpe.prov.gml.utils.GmlTags;

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:MultiGeometryTypeBinding.java 371 2008-01-10 09:30:19Z jpiera $

 * $Log$

 * Revision 1.5  2007/05/14 11:18:51  jorpiell

 * ProjectionFactory updated

 *

 * Revision 1.4  2007/05/14 09:52:53  jorpiell

 * Nullpointer exception fixed

 *

 * Revision 1.3  2007/05/14 09:31:06  jorpiell

 * Add the a new class to compare tags

 *

 * Revision 1.2  2007/05/08 10:24:16  jorpiell

 * Add comments to create javadocs

 *

 * Revision 1.1  2007/05/07 12:58:42  jorpiell

 * Add some methods to manage the multigeometries

 *

 *

 */

/**

 * It parses a gml:MultiGeometryType object. Example:

 * <p>

 * <pre>

 * <code>

 * <MultiGeometry gid="c731" srsName="http://www.opengis.net/gml/srs/epsg.xml#4326">

 * <geometryMember>

 * <Point gid="P6776">

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

 * </Point>

 * </geometryMember>

 * <geometryMember>

 * <LineString gid="L21216">

 * <coord><X>0.0</X><Y>0.0</Y></coord>

 * <coord><X>0.0</X><Y>50.0</Y></coord>

 * <coord><X>100.0</X><Y>50.0</Y></coord>

 * </LineString>

 * </geometryMember>

 * <geometryMember>

 * <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>

 * </geometryMember>

 * </MultiGeometry>

 * </code>

 * </pre>

 * </p>

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

 */

public class MultiGeometryTypeBinding extends GeometryBinding{

        /**

         * It parses the gml: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,GPEDefaultGmlParser handler) throws XmlStreamException, IOException {

                boolean endFeature = false;

                int currentTag;

                Object multiGeometry = null;

                super.setAtributtes(parser, handler);

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

                IQName tag = parser.getName();

                currentTag = parser.getEventType();

                while (!endFeature){

                        switch(currentTag){

                        case IXmlStreamReader.START_ELEMENT:

                                        if (handler.getQNameComparator().equals(tag,GmlTags.GML_GEOMETRYMEMBER)){

                                                Object geometry = handler.getProfile().getGeometryMemberTypeBinding().

                                                parse(parser, handler);

                                                if (multiGeometry ==null){

                                                    if (geometry instanceof PolygonTypeBinding){

                                                        multiGeometry = handler.getContentHandler().startMultiPolygon(id, srsName);

                                                    } else if (geometry instanceof LineStringTypeBinding){

                                multiGeometry = handler.getContentHandler().startMultiLineString(id, srsName);

                            } else if (geometry instanceof PointTypeBinding){

                                multiGeometry = handler.getContentHandler().startMultiPoint(id, srsName);

                            }else{

                                multiGeometry = handler.getContentHandler().startMultiGeometry(id, srsName);

                            }

                                                }

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

                                        }

                                        break;

                                case IXmlStreamReader.END_ELEMENT:

                                        if (handler.getQNameComparator().equals(tag,GmlTags.GML_MULTIGEOMETRY)){

                                                endFeature = true;

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

                                        }

                                        break;

                                case IXmlStreamReader.CHARACTERS:

                                        break;

                                }

                                if (!endFeature){

                                        currentTag = parser.next();

                                        tag = parser.getName();

                                }

                        }

                return multiGeometry;

        }

}