Android Open Source - Go2-Rennes Line Alert 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. j ava  2 s. 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.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
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 android.util.Log;
import fr.gotorennes.domain.Ligne;
import fr.gotorennes.domain.LineAlert;

public class LineAlertService extends RemoteService<LineAlert> {

  public static final String COMMAND = "getlinesalerts";
  public static final String NODE = "alert";

  private static DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssz");

  private static LineAlertService instance;

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

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

  private Map<Long, Long> lastUpdate = new HashMap<Long, Long>();
  private Map<Long, List<LineAlert>> cache = new HashMap<Long, List<LineAlert>>();

  public List<LineAlert> getLineAlerts(Ligne ligne) {
    List<LineAlert> alerts = cache.get(ligne.id);
    if (alerts == null || System.currentTimeMillis() - lastUpdate.get(ligne.id) > 3600000) {
      Map<String, String> parameters = new HashMap<String, String>();
      parameters.put("mode", "line");
      parameters.put("line", ligne.code);
      alerts = loadList(COMMAND, NODE, parameters);
      if (alerts != null) {
        cache.put(ligne.id, alerts);
        lastUpdate.put(ligne.id, System.currentTimeMillis());
      }
    }
    return alerts;
  }

  @Override
  protected LineAlert populate(JSONObject jsonObject) throws JSONException {
    LineAlert lineAlert = new LineAlert();
    lineAlert.titre = jsonObject.getString("title");
    lineAlert.debut = parseDate(jsonObject.getString("starttime"));
    lineAlert.fin = parseDate(jsonObject.getString("endtime"));
    lineAlert.detail = jsonObject.getString("detail");
    lineAlert.perturbationMajeure = "1".equals(jsonObject.getString("majordisturbance"));
    return lineAlert;
  }

  public static Date parseDate(String input) {
    if (input == null) {
      return null;
    }
    if (input.endsWith("Z")) {
      input = input.substring(0, input.length() - 1) + "GMT-00:00";
    } else {
      int inset = 6;
      String s0 = input.substring(0, input.length() - inset);
      String s1 = input.substring(input.length() - inset, input.length());
      input = s0 + "GMT" + s1;
    }
    try {
      return dateFormat.parse(input);
    } catch (Exception ex) {
      Log.e("GoToRennes", ex.getMessage());
    }
    return null;
  }
}

Java Source Code List

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