Application: gvSIG desktop » gvSIG data provider for GPE

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

import java.io.IOException;

import javax.xml.namespace.QName;

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

import org.gvsig.gpe.gml.utils.GMLTags;

import org.gvsig.gpe.xml.stream.EventType;

import org.gvsig.gpe.xml.stream.IXmlStreamReader;

import org.gvsig.gpe.xml.stream.XmlStreamException;

import org.gvsig.gpe.xml.utils.CompareUtils;

/* 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:BoundedByTypeBinding.java 371 2008-01-10 09:30:19Z jpiera $

 * $Log$

 * Revision 1.1  2007/05/14 09:31:06  jorpiell

 * Add the a new class to compare tags

 *

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

 * Add some methods to manage the multigeometries

 *

 *

 */

/**

 * It parses a gml:BoundingShapeType object. Example:

 * <p>

 * <pre>

 * <code>

 * <gml:boundedBy>

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

 * <gml:coord><gml:X>0</gml:X><gml:Y>0</gml:Y></gml:coord>

 * <gml:coord><gml:X>50</gml:X><gml:Y>50</gml:Y></gml:coord>

 * </gml:Box>

 * </gml:boundedBy>

 * </code>

 * </pre>

 * </p> 

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

 */

public class BoundedByTypeBinding {

        /**

         * It parses the gml:shapeType tag

         * @param parser

         * The XML parser

         * @param handler

         * The GPE parser that contains the content handler and

         * the error handler

         * @return

         * The Bounding box

         * @throws XmlStreamException

         * @throws IOException

         */

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

        parser.require(EventType.START_ELEMENT, GMLTags.GML_BOUNDEDBY);

                boolean endFeature = false;

                EventType currentTag;

                Object bbox = null;                

                parser.nextTag();

                QName tag = parser.getElementName();

                currentTag = parser.getEventType();

        while (!endFeature) {

            switch (currentTag.getCode()) {

            case EventType.START_ELEMENT_CODE:

                bbox = parseTag(parser, handler, tag);

                parser.require(EventType.END_ELEMENT, tag);

                break;

            case EventType.END_ELEMENT_CODE:

                if (CompareUtils.compareWithNamespace(tag, GMLTags.GML_BOUNDEDBY)) {

                    endFeature = true;

                }

                break;

            }

            if (!endFeature) {

                currentTag = parser.nextTag();

                tag = parser.getElementName();

            }

        }

        parser.require(EventType.END_ELEMENT, GMLTags.GML_BOUNDEDBY);

                return bbox;        

        }

        /**

         * Parses the tag

         * @param parser

         * @param handler

         * @param tag

         * @return

         * @throws XmlStreamException

         * @throws IOException

         */

        protected Object parseTag(IXmlStreamReader parser,GPEDefaultGmlParser handler, QName tag) throws XmlStreamException, IOException{

                Object bbox = null;

                if (CompareUtils.compareWithNamespace(tag,GMLTags.GML_BOX)){

                        bbox = handler.getProfile().getBoxTypeBinding().parse(parser, handler);

                }

                return bbox;

        }

}