Android Open Source - Go2-Rennes Metro Station Service

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License

The source code is released under:

GNU General Public License

Java Source Code

/*******************************************************************************
 * Copyright (c) 2011 Michel DAVID mimah35-at-gmail.com
 * /*from ww w. ja v a 2 s. co  m*/
 * 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.
 * 
 * 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/>.
 ******************************************************************************/
package fr.gotorennes.remote;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.json.JSONException;
import org.json.JSONObject;

import android.content.Context;
import fr.gotorennes.domain.MetroStation;

public class MetroStationService extends RemoteService<MetroStation> {

  public static final String COMMAND = "getmetrostations";
  public static final String NODE = "station";

  private static MetroStationService instance;

  private MetroStationService(Context context) {
    super();
  }
  
  protected String getVersion() {
    return "2.0";
  }

  public static synchronized MetroStationService getInstance(Context context) {
    if (instance == null) {
      instance = new MetroStationService(context);
    }
    return instance;
  }

  private List<MetroStation> cache = null;

  public List<MetroStation> getMetroStations() {
    if (cache == null) {
      cache = loadList(COMMAND, NODE);
    }
    return cache != null ? new ArrayList<MetroStation>(cache) : cache;
  }

  public List<MetroStation> getMetroStations(double latitudeMin, double latitudeMax, double longitudeMax, double longitudeMin) {
    List<MetroStation> metroStations = getMetroStations();
    if (metroStations == null) {
      return null;
    }

    List<MetroStation> result = new ArrayList<MetroStation>();
    for (MetroStation metro : metroStations) {
      if (metro.latitude >= latitudeMin && metro.latitude <= latitudeMax && metro.longitude >= longitudeMin && metro.longitude <= longitudeMax) {
        result.add(metro);
      }
    }
    return result;
  }

  public List<MetroStation> getProximityMetroStations(double latitude, double longitude) {
    Map<String, String> parameters = new HashMap<String, String>();
    parameters.put("mode", "proximity");
    parameters.put("type", "coords");
    parameters.put("lat", String.valueOf(latitude));
    parameters.put("lng", String.valueOf(longitude));
    return loadList(COMMAND, NODE, parameters);
  }

  public MetroStation getMetroStation(String id) {
    List<MetroStation> metroStations = getMetroStations();
    if (metroStations == null) {
      return null;
    }
    for (MetroStation metroStation : metroStations) {
      if (metroStation.id.equals(id)) {
        return metroStation;
      }
    }
    return null;
  }

  @Override
  protected MetroStation populate(JSONObject jsonObject) throws JSONException {
    MetroStation metroStation = new MetroStation();
    metroStation.id = jsonObject.getString("id");
    metroStation.name = jsonObject.getString("name");
    metroStation.sequence = jsonObject.getInt("rankingPlatformDirection1");
    metroStation.latitude = Double.valueOf(jsonObject.getString("latitude"));
    metroStation.longitude = Double.valueOf(jsonObject.getString("longitude"));
    return metroStation;
  }

}

Java Source Code List

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