fr.inria.ucn.collectors.LlamaCollector.java Source code

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Here is the source code for fr.inria.ucn.collectors.LlamaCollector.java

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/*******************************************************************************
 * Copyright (C) 2014 MUSE team Inria Paris - Rocquencourt
 * 
 * This file is part of UCNDataCollector.
 * 
 * UCNDataCollector is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * UCNDataCollector 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 Affero Public License for more details.
 * 
 * You should have received a copy of the GNU Affero Public License
 * along with UCNDataCollector.  If not, see <http://www.gnu.org/licenses/>.
 ******************************************************************************/
package fr.inria.ucn.collectors;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;

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

import fr.inria.ucn.Constants;
import fr.inria.ucn.Helpers;

import android.content.Context;
import android.os.Environment;
import android.util.Log;

/**
 * Record stored Llama app areas (user tagged environments either based on available WiFi
 * networks or mobile cells. The areas are usually stored to /sdcard/Llama/Llama_Areas.txt
 * (after user manually exports the data).
 * 
 * TODO: can we somehow trigger data export from Llama ? 
 * 
 * @author Anna-Kaisa Pietilainen <anna-kaisa.pietilainen@inria.fr>
 *
 */
public class LlamaCollector implements Collector {

    /* (non-Javadoc)
     * @see fr.inria.ucn.collectors.Collector#run(android.content.Context, long)
     */
    @Override
    public void run(Context c, long ts) {
        try {
            String state = Environment.getExternalStorageState();
            File llamaAreas = new File(Environment.getExternalStorageDirectory() + "/Llama/Llama_Areas.txt");

            if (Environment.MEDIA_MOUNTED.equals(state) && llamaAreas.exists()) {
                JSONObject data = new JSONObject();
                data.put("source_file", llamaAreas.toString());

                BufferedReader in = null;
                try {
                    in = new BufferedReader(new FileReader(llamaAreas), 1024);
                    String line;
                    JSONObject a = new JSONObject();
                    while ((line = in.readLine()) != null) {
                        String[] tmp = line.trim().split("\\|");
                        JSONArray wifi = new JSONArray();
                        JSONArray cell = new JSONArray();
                        for (int i = 1; i < tmp.length; i++) {
                            String[] tmp2 = tmp[i].split("\\:");
                            if (tmp2[0].trim().equalsIgnoreCase("W")) {
                                wifi.put(tmp2[1].trim());
                            } else {
                                // FIXME: figure out what these values are ?!?
                                JSONObject cid = new JSONObject();
                                cid.put("1", Integer.parseInt(tmp2[0].trim()));
                                cid.put("2", Integer.parseInt(tmp2[1].trim()));
                                cid.put("3", Integer.parseInt(tmp2[2].trim()));
                                cell.put(cid);
                            }
                        }
                        JSONObject o = new JSONObject();
                        o.put("wifi_networks", wifi); // wifi networks associated to this area
                        o.put("cells", cell); // cell ids associated to this area
                        a.put(tmp[0].trim(), o);
                    }
                    data.put("locations", a);

                    // done
                    Helpers.sendResultObj(c, "llama_location", ts, data);

                } catch (FileNotFoundException e) {
                    Log.w(Constants.LOGTAG, "Llama exports not available", e);
                } catch (IOException e) {
                    Log.w(Constants.LOGTAG, "Llama exports not available", e);
                }

                if (in != null)
                    try {
                        in.close();
                    } catch (IOException e) {
                    }
            } else {
                Log.w(Constants.LOGTAG, "Llama exports not available, file=" + llamaAreas.toString() + ", exists="
                        + llamaAreas.exists());
            }

        } catch (JSONException jex) {
            Log.w(Constants.LOGTAG, "failed to create json object", jex);
        }
    }
}