gvSIG tools: Gazetteer

/* 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

 */

package org.gvsig.gazetteer.wfsg.parsers;

import java.awt.geom.Point2D;

import org.gvsig.catalog.metadataxml.XMLNode;

import org.gvsig.catalog.metadataxml.XMLTree;

import org.gvsig.fmap.geom.GeometryLocator;

import org.gvsig.fmap.geom.GeometryManager;

import org.gvsig.fmap.geom.Geometry.SUBTYPES;

import org.gvsig.fmap.geom.exception.CreateGeometryException;

import org.gvsig.fmap.geom.primitive.Point;

import org.gvsig.gazetteer.idec.parsers.IdecFeatureParser;

import org.gvsig.gazetteer.querys.Feature;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

/**

 * This class is used to parse the getFeature request

 *

 *

 * @author Jorge Piera Llodra (piera_jor@gva.es)

 */

public class WfsgFeatureParser {

    private static final Logger logger =

        LoggerFactory.getLogger(WfsgFeatureParser.class);

        private String geomType = null;

        private String namespace = null;

        private static final String POSITION_NODE = "position->gml:Point->gml:coordinates";

        private static final String GEOGRAPHICIDENTIFIER_NODE = "geographicIdentifier";

        private static final String FEATUREMEMBER = "gml:featureMember";

        /**

         * It parses the answer

         *

         *

         * @return Array of features

         * @param node XML tree that contains the getFeature Answer

         * @param featureType FEature selected in the thesaurus list

         * @param attribute Attribute to do the search

         */

        public Feature[] parse(XMLNode node) {

                XMLNode[] nodeFeatures = XMLTree.searchMultipleNode(node,FEATUREMEMBER);

                namespace = "";

                if ((nodeFeatures != null) && (nodeFeatures.length > 0)){

                        if (nodeFeatures[0].getSubnodes().length > 0){

                                String nodeName = nodeFeatures[0].getSubnodes()[0].getName();

                                if (nodeName.split(":").length == 2){

                                        namespace = nodeName.split(":")[0] + ":";

                                }

                                return parseWFS(nodeFeatures,nodeName);

                        }

                }

                return null;

        }

        /**

         * It parses the a WFS answer

         *

         *

         * @return Array of features

         * @param nodeFeatures XML tree that contains the Features

         * @param featureType FEature selected in the thesaurus list

         * @param attribute Attribute to do the search

         * @param geomField Field that contains the geometry

         */

        public Feature[] parseWFS(XMLNode[] nodeFeatures, String featureType) {

                Feature[] features = new Feature[nodeFeatures.length];

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

                        XMLNode nodeName = XMLTree.searchNode(nodeFeatures[i],featureType + "->" + GEOGRAPHICIDENTIFIER_NODE);

                        String name = "";

                        if (nodeName != null){

                                if ((nodeName.getText() != null) && (!(nodeName.getText().equals("")))){

                                        name = nodeName.getText();

                                } else if ((nodeName.getCdata() != null) && (!(nodeName.getCdata().equals("")))){

                                        name = nodeName.getCdata();

                                }

                        }

                        String id = XMLTree.searchNodeAtribute(nodeFeatures[i],featureType,"fid");

                        String description = name;

                        Point point = getCoordinates(XMLTree.searchNodeValue(nodeFeatures[i],

                                        featureType + "->" + POSITION_NODE));

                        features[i] = new Feature(id,name,description,point);

                }

                return features;

        }

        /**

         * It returns a pair of coordinates of the Feature

         * @return

         * @param sCoordinates String that contains the coordinates

         */

        private Point getCoordinates(String sCoordinates) {

            GeometryManager geomManager = GeometryLocator.getGeometryManager();

                if (sCoordinates != null){

                        double x = Double.parseDouble(sCoordinates.split(",")[0]);

                        double y = Double.parseDouble(sCoordinates.split(",")[1]);

                        Point point =null;

                        try {

                point = geomManager.createPoint(x, y, SUBTYPES.GEOM2D);

            } catch (CreateGeometryException | NumberFormatException e) {

                StringBuilder builder = new StringBuilder();

                builder.append("Can't create point: (");

                builder.append(x);

                builder.append(",");

                builder.append(y);

                builder.append(")");

                logger.warn(builder.toString());

            }

                        return point;

                }return null;

        }

}