org.thiesen.hhpt.geolookup.appengine.AppEngineStationFinder.java Source code

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Here is the source code for org.thiesen.hhpt.geolookup.appengine.AppEngineStationFinder.java

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/*
 * $ Id $
 * (c) Copyright 2009 Marcus Thiesen (marcus@thiesen.org)
 *
 *  This file is part of HHPT.
 *
 *  HHPT 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.
 *
 *  HHPT 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 HHPT.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
package org.thiesen.hhpt.geolookup.appengine;

import java.io.IOException;

import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.ResponseHandler;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.BasicResponseHandler;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import org.thiesen.hhpt.geolookup.StationFinder;
import org.thiesen.hhpt.shared.model.station.StationType;
import org.thiesen.hhpt.shared.model.station.Stations;

public class AppEngineStationFinder implements StationFinder {

    public Stations makeGeoLookup(final double lat, final double lon, final double defaultSearchRadiusMiles) {
        final HttpClient client = new DefaultHttpClient();
        final HttpGet get = new HttpGet("http://hhpt-search.appspot.com/search?lat=" + lat + "&lng=" + lon
                + "&radius=" + defaultSearchRadiusMiles);

        try {
            final ResponseHandler<String> responseHandler = new BasicResponseHandler();

            final String body = client.execute(get, responseHandler);

            return parse(body);

        } catch (final ClientProtocolException e) {
            e.printStackTrace();

        } catch (final IOException e) {
            e.printStackTrace();

        } catch (final JSONException e) {
            e.printStackTrace();
        }

        return new Stations();

    }

    private Stations parse(final String body) throws JSONException {
        final JSONObject obj = new JSONObject(body);

        final JSONArray values = obj.getJSONArray("results");

        final Stations retval = new Stations();
        for (int i = 0; i < values.length(); i++) {
            final JSONObject stationObj = values.getJSONObject(i);

            retval.add(stationObj.getString("id"), stationObj.getString("lat"), stationObj.getString("lng"),
                    StationType.valueOf(stationObj.getString("stationType")), stationObj.getString("stationName"),
                    stationObj.getString("operator"));
        }

        return retval;
    }

}