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.parser.v2.coordinates.CoordTypeIterator;

import org.gvsig.gpe.gml.parser.v2.coordinates.CoordinatesTypeIterator;

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:LineStringTypeBinding.java 195 2007-11-26 09:02:22Z jpiera $

 * $Log$

 * Revision 1.6  2007/05/18 10:41:01  csanchez

 * Actualizaci?n libGPE-GML eliminaci?n de clases inecesarias

 *

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

 * ProjectionFactory updated

 *

 * Revision 1.4  2007/05/14 09:31:06  jorpiell

 * Add the a new class to compare tags

 *

 * Revision 1.3  2007/05/08 10:24:16  jorpiell

 * Add comments to create javadocs

 *

 * Revision 1.2  2007/05/07 12:58:42  jorpiell

 * Add some methods to manage the multigeometries

 *

 * Revision 1.1  2007/05/07 07:06:46  jorpiell

 * Add a constructor with the name and the description fields

 *

 *

 */

/**

 *  A LineString is a special curve that consists of a

 *  single segment with linear interpolation. It is defined

 *  by two or more coordinate tuples, with linear interpolation

 *  between them.

 *  It parses a gml:LineStringType object. Example:

 * <p>

 * <pre>

 * <code>

 * <LineString>

 * <coord><X>56.1</X><Y>0.45</Y></coord>

 * <coord><X>67.23</X><Y>0.98</Y></coord>

 * </LineString>

 * </code>

 * </pre>

 * </p> 

 * @author Jorge Piera Llodr? (piera_jor@gva.es)

 */

public class LineStringTypeBinding extends GeometryBinding{

        /**

         * It parses the gml:LineQName tag

         * @param parser

         * The XML parser

         * @param handler

         * The GPE parser that contains the content handler and

         * the error handler

         * @return

         * A line

         * @throws XmlStreamException

         * @throws IOException

         */

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

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

                boolean endFeature = false;

                EventType currentTag;

                Object lineString = null;

                super.setAtributtes(parser, handler.getErrorHandler());

                QName tag = parser.getElementName();

                currentTag = parser.getEventType();

                while (!endFeature){

                        switch(currentTag.getCode()){

                        case EventType.START_ELEMENT_CODE:

                            currentTag = parser.nextTag();

                            tag = parser.getElementName();

                                lineString = parseTag(parser, handler, tag, id, srsName);

                                 return lineString;

                        case EventType.END_ELEMENT_CODE:

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

                                        endFeature = true;

                                        handler.getContentHandler().endLineString(lineString);

                                }

                                break;

                        }

                        /*GR: no obligo a terminar de parsear todo, para que... si tenemos random access :)

                        if (!endFeature){                                        

                                currentTag = parser.nextTag();

                                tag = parser.getElementName();

                        }

                        */

                }                

                return lineString;        

        }

        /**

         * It parses next tag

         * @param parser

         * @param handler

         * @param tag

         * @param id

         * @param srsName

         * @return

         * @throws XmlStreamException

         * @throws IOException

         */

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

                Object lineString = null;

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

                        CoordinatesTypeIterator coordinatesIteartor = handler.getProfile().getCoordinatesTypeBinding();

                        coordinatesIteartor.initialize(parser, handler,GMLTags.GML_LINESTRING);

                        lineString = handler.getContentHandler().startLineString(id,

                                        coordinatesIteartor,                                                                

                                        srsName);                                                

                }else if (CompareUtils.compareWithNamespace(tag,GMLTags.GML_COORD)){

                        CoordTypeIterator coordinatesIteartor = handler.getProfile().getCoordTypeBinding();

                        coordinatesIteartor.initialize(parser, handler,GMLTags.GML_LINESTRING);

                        lineString = handler.getContentHandler().startLineString(id,

                                        coordinatesIteartor,                                                                

                                        srsName);                        

                }

                return lineString;

        }

}