GoogleReverseGeocoding.java

/**
 *
 *    geo-platform
 *    Rich webgis framework
 *    http://geo-platform.org
 *   ====================================================================
 *
 *   Copyright (C) 2008-2017 geoSDI Group (CNR IMAA - Potenza - ITALY).
 *
 *   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 3 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, see http://www.gnu.org/licenses/
 *
 *   ====================================================================
 *
 *   Linking this library statically or dynamically with other modules is
 *   making a combined work based on this library. Thus, the terms and
 *   conditions of the GNU General Public License cover the whole combination.
 *
 *   As a special exception, the copyright holders of this library give you permission
 *   to link this library with independent modules to produce an executable, regardless
 *   of the license terms of these independent modules, and to copy and distribute
 *   the resulting executable under terms of your choice, provided that you also meet,
 *   for each linked independent module, the terms and conditions of the license of
 *   that module. An independent module is a module which is not derived from or
 *   based on this library. If you modify this library, you may extend this exception
 *   to your version of the library, but you are not obligated to do so. If you do not
 *   wish to do so, delete this exception statement from your version.
 */
package org.geosdi.geoplatform.gui.server.service.impl.google;

import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;


import org.geosdi.geoplatform.gui.client.model.GeocodingBean;
import org.geosdi.geoplatform.gui.client.model.GeocodingKeyValue;
import org.geosdi.geoplatform.gui.client.model.google.GoogleGeocodeBean;
import org.geosdi.geoplatform.gui.oxm.model.google.GPGoogleGeocodeRoot;
import org.geosdi.geoplatform.gui.oxm.model.google.GPGoogleResult;
import org.geosdi.geoplatform.gui.oxm.model.google.enums.ResponseStatus;
import org.geosdi.geoplatform.gui.server.service.IReverseGeocoding;
import org.geosdi.geoplatform.oxm.jaxb.GPJaxbMarshaller;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

/**
 *
 * @author Giuseppe La Scaleia - CNR IMAA geoSDI Group
 * @email giuseppe.lascaleia@geosdi.org
 */
@Component("googleReverseGeocoding")
public class GoogleReverseGeocoding implements IReverseGeocoding {

    // URL prefix to the reverse geocoder
    private static final String REVERSE_GEOCODER_PREFIX_FOR_XML = "http://maps.googleapis.com/maps/api/geocode/xml";
    //
    private Logger logger = LoggerFactory.getLogger(this.getClass());
    //
    @Autowired
    private GPJaxbMarshaller geocoderGoogleJaxbMarshaller;

    /**
     * (non-Javadoc)
     *
     * @see
     * org.geosdi.geoplatform.gui.server.service.IReverseGeocoding#findLocation(double,
     * double)
     */
    @Override
    public GeocodingBean findLocation(double lat, double lon)
            throws IOException {

        URL url = new URL(REVERSE_GEOCODER_PREFIX_FOR_XML + "?latlng="
                + URLEncoder.encode(lat + "," + lon, "UTF-8") + "&language=it&sensor=true");

        HttpURLConnection conn = (HttpURLConnection) url.openConnection();

        GPGoogleGeocodeRoot oxmBean = (GPGoogleGeocodeRoot) this.geocoderGoogleJaxbMarshaller.
                unmarshal(conn.getInputStream());

        if (oxmBean.getStatus().equals(
                ResponseStatus.EnumResponseStatus.STATUS_OK.getValue())) {
            GPGoogleResult result = oxmBean.getResultList().get(0);
            return new GoogleGeocodeBean(result);
        }

        /**
         * @@@@@@@@@@@@@@ TODO FIXE ME
         * @@@@@@@@@@@@@@@@@@@@ *
         */
        return new GoogleGeocodeBean(GeocodingKeyValue.ZERO_RESULTS.toString());
    }

}