| gvSIG desktop 1

package org.gvsig.gpe.kml.parser.v21.coordinates;

import java.io.IOException;

import javax.xml.namespace.QName;

import org.gvsig.gpe.kml.parser.GPEDefaultKmlParser;

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

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:LatLonBoxBinding.java 357 2008-01-09 17:50:08Z jpiera $

 * $Log$

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

 * Refactoring of some package names

 *

 * Revision 1.1  2007/05/09 08:36:24  jorpiell

 * Add the bbox to the layer

 *

 *

 */

/**

 * This class parses a LatLonBox tag. Example:

 * <p>

 * <pre>

 * <code> 

 * <LatLonAltBox>

 * <north>43.374</north>

 * <south>42.983</south>

 * <east>-0.335</east>

 * <west>-1.423</west>

 * <rotation>39.37878630116985</rotation>

 * </LatLonAltBox>

 * </code>

 * </pre>

 * </p> 

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

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

 */

public class LatLonBoxIterator extends KmlCoordinatesIterator{

        double[] min = null;

        double[] max = null;

        int iterations = 0;

        /**

         * It parses the LatLonAltBox tag

         * @param parser

         * The XML parser

         * @param handler

         * The GPE parser that contains the content handler and

         * the error handler

         * @return

         * A Bounding box

         * @throws IOException 

         * @throws XmlStreamException 

         */

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

                boolean endFeature = false;

                int currentTag;

                Object bbox = null;

                min = new double[3];

                max = new double[3];

                double rotation;

                iterations = 0;

                dimension = 2;

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

                QName tag = parser.getName();

                currentTag = parser.getEventType();

                while (!endFeature){

                        switch(currentTag){

                        case IXmlStreamReader.START_ELEMENT:

                                if (CompareUtils.compareWithOutNamespace(tag,Kml2_1_Tags.NORTH)){

                                        parser.next();

                                        max[1] = handler.getProfile().getDoubleBinding().parse(parser.getText());

                                }else if (CompareUtils.compareWithOutNamespace(tag,Kml2_1_Tags.SOUTH)){

                                        parser.next();

                                        min[1] = handler.getProfile().getDoubleBinding().parse(parser.getText());

                                }else if (CompareUtils.compareWithOutNamespace(tag,Kml2_1_Tags.EAST)){

                                        parser.next();

                                        max[0] = handler.getProfile().getDoubleBinding().parse(parser.getText());

                                }else if (CompareUtils.compareWithOutNamespace(tag,Kml2_1_Tags.WEST)){

                                        parser.next();

                                        min[0] = handler.getProfile().getDoubleBinding().parse(parser.getText());

                                }else if (CompareUtils.compareWithOutNamespace(tag,Kml2_1_Tags.ROTATION)){

                                        parser.next();

                                        rotation = handler.getProfile().getDoubleBinding().parse(parser.getText());

                                }

                                break;

                        case IXmlStreamReader.END_ELEMENT:

                                if (CompareUtils.compareWithOutNamespace(tag,Kml2_1_Tags.LATLONBOX)){                                                

                                        endFeature = true;

                                        bbox = handler.getContentHandler().startBbox(id, this, Kml2_1_Tags.DEFAULT_SRS);

                                        handler.getContentHandler().endBbox(bbox);

                                }

                                break;

                        case IXmlStreamReader.CHARACTERS:                                        

                                break;

                        }

                        if (!endFeature){                                        

                                currentTag = parser.next();

                                tag = parser.getName();

                        }

                }                        

                return bbox;        

        }

        /*

         * (non-Javadoc)

         * @see org.gvsig.gpe.parser.ICoordinateIterator#hasNext()

         */

        public boolean hasNext() throws IOException {

                if (iterations < 2){

                        return true;

                }

                return false;

        }

        /*

         * (non-Javadoc)

         * @see org.gvsig.gpe.parser.ICoordinateIterator#next(double[])

         */

        public void next(double[] buffer) throws IOException {

                if (iterations == 0){

                        for (int i=0 ; i<buffer.length ; i++){

                                buffer[i] = min[i];

                        }

                        iterations = 1;

                }

                if (iterations == 1){

                        for (int i=0 ; i<buffer.length ; i++){

                                buffer[i] = max[i];

                        }

                        iterations = 2;

                }

        }

}