Android Open Source - syncarnet Deleted Tasks

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License

The source code is released under:

GNU General Public License

Java Source Code

/*
 * Copyright (C) 2013-14 Nicolas Miller, Florian Paindorge
 *//w w 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, or
 * (at your option) any later version.
 *
 * 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.syncarnet.tasks;

import android.util.Log;

import java.util.UUID;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;
import java.util.Date; // rightNow = new Date().getTime(); (In Unix Time)

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

import java.io.Serializable;

public class DeletedTasks extends ArrayList<UUID> implements Serializable {
  private HashMap<UUID, Long> timestamps = new HashMap<UUID, Long>();
  private static final String TAG = "SynCarnet";

  public boolean add(UUID uuid) {
    timestamps.put(uuid, new Long(new Date().getTime()));
    return super.add(uuid);
  }

  public boolean add(UUID uuid, long timestamp) {
    timestamps.put(uuid, new Long(timestamp));
    return super.add(uuid);
  }

  public long getTimestamp(UUID uuid) {
    return (timestamps.get(uuid)).longValue();
  }

  /**
   * Clear all the deleted tasks older than a given timestamp
   */
  public void clearDeletedTask(long timestamp) {
    for (UUID uuid : this) {
      if (this.getTimestamp(uuid) < timestamp) {
        this.remove(uuid);
      }
    }
  }

  public String jsonify() {
    JSONObject jsonDT = new JSONObject();
    JSONArray jsonUUIDs = new JSONArray();
    JSONArray jsonTimestamps = new JSONArray();
    JSONObject jsonTTemp;
    try {
      for (int i = 0; i < this.size(); i++)
        jsonUUIDs.put(this.get(i).toString());
      jsonDT.put("uuids", jsonUUIDs.toString());
      Log.d(TAG, "Added uuids to json");

      for (Map.Entry<UUID, Long> entry : timestamps.entrySet()) {
        jsonTTemp = new JSONObject();
        UUID key = entry.getKey();
        jsonTTemp.put("uuid", key.toString());
        Long value = entry.getValue();
        jsonTTemp.put("timestamp", value);
        jsonTimestamps.put(jsonTTemp.toString());
      }
      jsonDT.put("timestamps", jsonTimestamps.toString());
      Log.d(TAG, "Added timestamps to json");

      return jsonDT.toString();
    } catch (JSONException e) {
      Log.e(TAG, "Exception while jsonifying");
      return "";
    }
  }

  public void unJsonify(String json) {
    try {
      JSONObject jsonDT = new JSONObject(json);
      JSONArray jsonUUIDs = new JSONArray(jsonDT.getString("uuids"));
      for (int i = 0; i < this.size(); i++)
        this.add(UUID.fromString(jsonUUIDs.getString(i)));
      Log.d(TAG, "Recreated uuids from json");

      JSONArray jsonTimestamps = new JSONArray(jsonDT.getString("timestamps"));
      JSONObject jsonTTemp;
      for (int i = 0; i < jsonTimestamps.length(); i++) {
        jsonTTemp = new JSONObject(jsonTimestamps.getString(i));
        timestamps.put(UUID.fromString(jsonTTemp.getString("uuid")), jsonTTemp.getLong("timestamp"));
      }
      Log.d(TAG, "Recreated timestamps from json");
    } catch (JSONException e) {
      Log.e(TAG, "Exception while unjsonifying");
    }
  }
}

Java Source Code List

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