Android Open Source - Go2-Rennes Relay Park 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 w  w  w  .  j ava 2s .  c  om*/
 * 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.Collections;
import java.util.Comparator;
import java.util.List;

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

import android.content.Context;
import fr.gotorennes.AbstractMapActivity;
import fr.gotorennes.domain.RelayPark;

public class RelayParkService extends RemoteService<RelayPark> {

  public static final String COMMAND = "getrelayparks";
  public static final String NODE = "relaypark";

  private static RelayParkService instance;

  private RelayParkService(Context context) {
    super();
  }

  protected String getVersion() {
    return "2.0";
  }
  
  public static synchronized RelayParkService getInstance(Context context) {
    if (instance == null) {
      instance = new RelayParkService(context);
    }
    return instance;
  }

  private long lastUpdate = 0;
  private List<RelayPark> cache = null;

  public List<RelayPark> getRelayParks() {
    if (cache == null || System.currentTimeMillis() - lastUpdate > 60000) {
      cache = loadList(COMMAND, NODE);
      if (cache != null) {
        lastUpdate = System.currentTimeMillis();
      }
    }
    return cache != null ? new ArrayList<RelayPark>(cache) : cache;
  }

  public List<RelayPark> getRelayParks(double latitudeMin, double latitudeMax, double longitudeMax, double longitudeMin) {
    List<RelayPark> relayParks = getRelayParks();
    if (relayParks == null) {
      return null;
    }
    List<RelayPark> result = new ArrayList<RelayPark>();
    for (RelayPark parc : relayParks) {
      if (parc.latitude >= latitudeMin && parc.latitude <= latitudeMax && parc.longitude >= longitudeMin && parc.longitude <= longitudeMax) {
        result.add(parc);
      }
    }
    return result;
  }

  public List<RelayPark> getProximityRelayParks(final double latitude, final double longitude) {
    List<RelayPark> relayParks = loadList(getProximityCommand(latitude, longitude), NODE);
    if (relayParks != null) {
      Collections.sort(relayParks, new Comparator<RelayPark>() {

        @Override
        public int compare(RelayPark relayPark1, RelayPark relayPark2) {
          double distance1 = AbstractMapActivity.getDistance(latitude, longitude, relayPark1.latitude, relayPark1.longitude);
          double distance2 = AbstractMapActivity.getDistance(latitude, longitude, relayPark2.latitude, relayPark2.longitude);
          return Double.compare(distance1, distance2);
        }
      });
    }
    return relayParks;
  }

  public RelayPark getRelayPark(String name) {
    List<RelayPark> relayParks = getRelayParks();
    if (relayParks == null) {
      return null;
    }

    for (RelayPark relayPark : relayParks) {
      if (relayPark.name.equals(name)) {
        return relayPark;
      }
    }
    return null;
  }

  protected String getProximityCommand(double latitude, double longitude) {
    StringBuilder stringBuilder = new StringBuilder(COMMAND);
    stringBuilder.append("&latitude=");
    stringBuilder.append(String.valueOf(latitude));
    stringBuilder.append("&longitude=");
    stringBuilder.append(String.valueOf(longitude));
    return stringBuilder.toString();
  }

  @Override
  protected RelayPark populate(JSONObject jsonObject) throws JSONException {
    RelayPark relayPark = new RelayPark();
    relayPark.name = jsonObject.getString("name");
    relayPark.state = Integer.parseInt(jsonObject.getString("state"));
    relayPark.capacity = Integer.parseInt(jsonObject.getString("carparkcapacity"));
    relayPark.available = Integer.parseInt(jsonObject.getString("carparkavailable"));
    relayPark.latitude = Double.parseDouble(jsonObject.getString("latitude"));
    relayPark.longitude = Double.parseDouble(jsonObject.getString("longitude"));
    return relayPark;
  }

}

Java Source Code List

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