Android Open Source - cost-tracker Tracker File Writer

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License

The source code is released under:
GNU General Public License
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Java Source Code

package com.helpguest.droid.tracker.io;
/*from  www  .j av a2s.  c  om*/
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Collection;

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

import com.helpguest.droid.tracker.ITracker;
import com.helpguest.droid.tracker.ITrackerClock;

public class TrackerFileWriter implements ITrackerWriter {

  protected static final char DELIMITER_CHAR_REPLACEMENT = '\007';
  protected static final char DELIMITER_CHAR = ',';
  static final String TRACKER_DATA_FILE = "tracker_data";
  public static final String TRACKER_DATA_V1 = "tracker_data_v1.csv";
  private String dataStore;
  private FileOutputStream fos;
  private Context context;
  
  public TrackerFileWriter(Context applicationContext, SharedPreferences sharedPrefs) {
    dataStore = sharedPrefs.getString(TRACKER_DATA_V1, TRACKER_DATA_V1);
    context = applicationContext;
  }
  
  @Override
  public void write(ITracker tracker) {
    try {
      fos = context.openFileOutput(dataStore, Context.MODE_APPEND);
      fos.write(formatTrackerEntry(tracker).getBytes());
    } catch (FileNotFoundException e) {
      Log.d(TrackerFileWriter.class.toString(), "FileNotFoundException in write() attempting to create it: " + e.getMessage());
    } catch (IOException iox) {
      Log.d(TrackerFileWriter.class.toString(), "IOException in write(): " + iox.getMessage());
    } finally {
      if (fos != null) {
        try {
          fos.close();
        } catch (IOException e) {
          Log.d(TrackerFileWriter.class.toString(), "Failed closing fos in write(): " + e.getMessage());
        }
      }
    }
  }
  
  public void write(Collection<ITracker> trackers) {
    clear();
    for (ITracker t : trackers) {
      write(t);
    }
  }
  
  public void clear() {
    try {
      fos = context.openFileOutput(dataStore, Context.MODE_PRIVATE);
      fos.write("".getBytes());
    } catch (FileNotFoundException e) {
      Log.i(TrackerFileWriter.class.toString(), "Could not clear file because it was not found.");
    } catch (IOException e) {
      Log.i(TrackerFileWriter.class.toString(), "Could not clear file due to an IOException.");
    } finally {      
      try {
        fos.close();
      } catch (IOException e) {
        Log.i(TrackerFileWriter.class.toString(), "Could not close file after trying to clear it.");
      }
    }
  }

  private String formatTrackerEntry(ITracker tracker) {
    StringBuffer entries = new StringBuffer();
    for(ITrackerClock tClock : tracker.getAllTrackerClocks()) {
      StringBuffer tEntry = new StringBuffer(tracker.getName().replace(DELIMITER_CHAR, DELIMITER_CHAR_REPLACEMENT));
      tEntry.append(",");
      tEntry.append(tracker.getDescription().replace(DELIMITER_CHAR, DELIMITER_CHAR_REPLACEMENT));
      tEntry.append(",");
      tEntry.append(formatTrackerClockEntry(tClock));
      tEntry.append(",");
      tEntry.append(tracker.isVisible() ? "1" : "0");
      tEntry.append(",");
      tEntry.append(tracker.isAutoStop() ? "1" : "0");
      tEntry.append("\n");
      entries.append(tEntry);
    }
    if (entries.length() == 0) {
      entries.append(tracker.getName());
      entries.append(",");
      entries.append(tracker.getDescription());
      entries.append(",,0,0,");
      entries.append(tracker.isVisible() ? "1," : "0,");
      entries.append(tracker.isAutoStop() ? "1" : "0");
      entries.append("\n");      
    }
    return entries.toString();
  }

  private String formatTrackerClockEntry(ITrackerClock tClock) {  
    String note = tClock.getNote();
    StringBuffer tcEntry = new StringBuffer(note == null ? "" : note.replace(DELIMITER_CHAR, DELIMITER_CHAR_REPLACEMENT));
    tcEntry.append(",");
    Long startTime = tClock.startTime();
    tcEntry.append(startTime == null ? "0" : startTime.toString());
    tcEntry.append(",");
    Long stopTime = tClock.stopTime();
    tcEntry.append(stopTime == null ? "0" : stopTime.toString());
    return tcEntry.toString();
  }

}
Java Source Code List
