Android Open Source - Go2-Rennes Metro Station Status 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
 * // ww  w. ja  v a2s.  c o 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.HashMap;
import java.util.Map;

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

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

public class MetroStationStatusService extends RemoteService<String> {

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

  private static MetroStationStatusService instance;

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

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

  private Map<String, Long> lastUpdate = new HashMap<String, Long>();
  private Map<String, Boolean> cache = new HashMap<String, Boolean>();

  public boolean getMetroStationStatus(MetroStation station) {
    Boolean statut = cache.get(station.id);
    if (statut == null || System.currentTimeMillis() - lastUpdate.get(station.id) > 600000) {
      statut = "1".equals(loadObject(COMMAND, NODE, getStationParameters(station.id)));
      cache.put(station.id, statut);
      lastUpdate.put(station.id, System.currentTimeMillis());
    }
    return statut;
  }

  protected Map<String, String> getStationParameters(String id) {
    Map<String, String> parameters = new HashMap<String, String>();
    parameters.put("mode", "station");
    parameters.put("station", id);
    return parameters;
  }

  @Override
  protected String populate(JSONObject jsonObject) throws JSONException {
    return jsonObject.getString("status");
  }

}

Java Source Code List

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