Android Open Source - cost-tracker Tracker File Reader

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From Project

Back to project page cost-tracker.

License

The source code is released under:

GNU General Public License

Java Source Code

package com.helpguest.droid.tracker.io;
//  w  w w.j  a  v  a2  s . c  om
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.LineNumberReader;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;

import android.content.Context;
import android.content.SharedPreferences;
import android.util.Log;

import com.helpguest.droid.tracker.ITracker;
import com.helpguest.droid.tracker.SimpleTracker;
import com.helpguest.droid.tracker.TrackerClock;

public class TrackerFileReader implements ITrackerReader {

  private String dataStore;
  private FileInputStream fis = null;
  private Context context;
  
  public TrackerFileReader(Context applicationContext, SharedPreferences sharedPrefs) {
    context = applicationContext;
    dataStore = sharedPrefs.getString(TrackerFileWriter.TRACKER_DATA_V1, TrackerFileWriter.TRACKER_DATA_V1);
  }
  
  @Override
  public Collection<ITracker> getTrackers() {
    Map<String, ITracker> trackers = new HashMap<String, ITracker>();
    try {
      read(trackers);
    } catch (FileNotFoundException fnfx) {
      Log.d(TrackerFileReader.class.toString(), "FileNotFoundException in getTrackers(): " + fnfx.getMessage());
    } catch (IOException ioxe) {
      Log.d(TrackerFileReader.class.toString(), "IOException in getTrackers(): " + ioxe.getMessage());
    } finally {
      try {
        fis.close();
      } catch (IOException iox) {
        Log.d(TrackerFileReader.class.toString(), "IOException closing file in getTrackers(): " + iox.getMessage());
      }
    }

    return trackers.values();
  }

  private void read(Map<String, ITracker> trackers)
      throws FileNotFoundException, IOException {
    fis = context.openFileInput(dataStore);
    LineNumberReader lnr = new LineNumberReader(new InputStreamReader(fis));
    String nextLine = null;
    int lineNumber = 0;
    while( (nextLine = lnr.readLine()) != null) {
      ITracker nextTracker  = extractTracker(nextLine, lineNumber++);
      if (nextTracker != null) {
        ITracker existingTracker = trackers.get(nextTracker.getName());
        if (existingTracker != null) {
          ((SimpleTracker)existingTracker).add(nextTracker.getAllTrackerClocks());
        } else {
          trackers.put(nextTracker.getName(), nextTracker);            
        }          
      }
    }
  }

  private ITracker extractTracker(String nextLine, int lineNumber) {
    ITracker tracker = null;
    String[] data = nextLine.split(String.valueOf(TrackerFileWriter.DELIMITER_CHAR));
    try {
      tracker = new SimpleTracker(data[0].replace(TrackerFileWriter.DELIMITER_CHAR_REPLACEMENT, TrackerFileWriter.DELIMITER_CHAR));
      tracker.setDescription(data[1] == null ? "" : data[1].replace(TrackerFileWriter.DELIMITER_CHAR_REPLACEMENT, TrackerFileWriter.DELIMITER_CHAR));
      TrackerClock tClock = new TrackerClock(data[3] == null ? 0 : Long.parseLong(data[3]), data[4] == null ? 0 : Long.parseLong(data[4]));
      tClock.setNote(data[2] == null ? "" : data[2].replace(TrackerFileWriter.DELIMITER_CHAR_REPLACEMENT, TrackerFileWriter.DELIMITER_CHAR));
      tracker.add(tClock);
      tracker.setVisible(data[5] == null || Integer.parseInt(data[5]) > 0 ? true : false);
      //doing this last since the original data format doesn't have index 6 - 
      // after the file rewrites itself, this will not be an issue.
      tracker.setAutoStop(data[6] == null || Integer.parseInt(data[6]) > 0 ? true : false);
    } catch( ArrayIndexOutOfBoundsException aex) {
      Log.e(TrackerFileReader.class.toString(), "Error reading line: " + lineNumber + ": '" + nextLine + "'" + aex.getMessage());
    } catch( NumberFormatException nfex ) {
      Log.e(TrackerFileReader.class.toString(), "Error parsing 'visible' flag: " + lineNumber + ": '" + nextLine + "'" + nfex.getMessage());
    }
    return tracker;
  }

}

Java Source Code List

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