NodeOSMElement.java

/**
 * H2GIS is a library that brings spatial support to the H2 Database Engine
 * <http://www.h2database.com>. H2GIS is developed by CNRS
 * <http://www.cnrs.fr/>.
 *
 * This code is part of the H2GIS project. H2GIS is free software; 
 * you can redistribute it and/or modify it under the terms of the GNU
 * Lesser General Public License as published by the Free Software Foundation;
 * version 3.0 of the License.
 *
 * H2GIS 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 Lesser General Public License
 * for more details <http://www.gnu.org/licenses/>.
 *
 *
 * For more information, please consult: <http://www.h2gis.org/>
 * or contact directly: info_at_h2gis.org
 */

package org.h2gis.functions.io.osm;

import com.vividsolutions.jts.geom.Coordinate;
import com.vividsolutions.jts.geom.GeometryFactory;
import com.vividsolutions.jts.geom.Point;

/**
 * A class to manage the node element properties.
 *
 * @author Erwan Bocher
 */
public class NodeOSMElement extends OSMElement {

    private double latitude;
    private double longitude;
    private Double elevation = null;

    /**
     * Constructor
     * @param latitude Latitude value
     * @param longitude Longitude value
     */
    public NodeOSMElement(double latitude, double longitude) {
        this.latitude = latitude;
        this.longitude = longitude;
    }

    /**
     * @param elevation Elevation (also known as altitude or height) above mean sea level in metre,
     *                  based on geoid model EGM 96 which is used by WGS 84 (GPS).
     */
    public void setElevation(double elevation) {
        this.elevation = elevation;
    }

    /**
     * The geometry of the node
     *
     * @return Point value
     */
    public Point getPoint(GeometryFactory gf) {
        return gf.createPoint(new Coordinate(longitude,
                latitude));
    }

    /**
     * @return Elevation (also known as altitude or height) above mean sea level in metre,
     *                  based on geoid model EGM 96 which is used by WGS 84 (GPS).
     */
    public Double getElevation() {
        return elevation;
    }

    @Override
    public boolean addTag(String key, String value) {
        if(key.equalsIgnoreCase("ele")) {
            try {
                setElevation(Double.valueOf(value));
                return false;
            } catch (NumberFormatException ex) {
                // Not a number, some user enter "273 m"
                return super.addTag(key, value);
            }
        } else {
            return super.addTag(key, value);
        }
    }
}