Change TrackFormatWriter to be able to write multiple tracks to a file

MyTracks/src/com/google/android/apps/mytracks/io/file/CsvTrackWriter.java

@@ -58,7 +58,6 @@ public class CsvTrackWriter implements TrackFormatWriter {
 
   private final Context context;
   private PrintWriter printWriter;
-  private Track track;
   private int segmentIndex;
   private int pointIndex;
 
@@ -72,8 +71,7 @@ public class CsvTrackWriter implements TrackFormatWriter {
   }
 
   @Override
-  public void prepare(Track aTrack, OutputStream out) {
-    track = aTrack;
+  public void prepare(OutputStream out) {
     printWriter = new PrintWriter(out);
     segmentIndex = 0;
     pointIndex = 0;
@@ -85,7 +83,7 @@ public class CsvTrackWriter implements TrackFormatWriter {
   }
 
   @Override
-  public void writeHeader() {
+  public void writeHeader(Track track) {
     writeCommaSeparatedLine(context.getString(R.string.generic_name),
         context.getString(R.string.track_edit_activity_type_hint),
         context.getString(R.string.generic_description));
@@ -133,7 +131,7 @@ public class CsvTrackWriter implements TrackFormatWriter {
   }
 
   @Override
-  public void writeBeginTrack(Location firstPoint) {
+  public void writeBeginTrack(Track track, Location firstPoint) {
     writeCommaSeparatedLine(context.getString(R.string.description_track_segment),
         context.getString(R.string.description_track_point),
         context.getString(R.string.description_location_latitude),
@@ -149,7 +147,7 @@ public class CsvTrackWriter implements TrackFormatWriter {
   }
 
   @Override
-  public void writeEndTrack(Location lastPoint) {
+  public void writeEndTrack(Track track, Location lastPoint) {
     // Do nothing
   }
 

MyTracks/src/com/google/android/apps/mytracks/io/file/GpxTrackWriter.java

@@ -52,7 +52,6 @@ public class GpxTrackWriter implements TrackFormatWriter {
   }
 
   private final Context context;
-  private Track track;
   private PrintWriter printWriter;
 
   public GpxTrackWriter(Context context) {
@@ -65,8 +64,7 @@ public class GpxTrackWriter implements TrackFormatWriter {
   }
 
   @Override
-  public void prepare(Track aTrack, OutputStream outputStream) {
-    this.track = aTrack;
+  public void prepare(OutputStream outputStream) {
     this.printWriter = new PrintWriter(outputStream);
   }
 
@@ -79,7 +77,7 @@ public class GpxTrackWriter implements TrackFormatWriter {
   }
 
   @Override
-  public void writeHeader() {
+  public void writeHeader(Track track) {
     if (printWriter != null) {
       printWriter.println("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
       printWriter.println("<gpx");
@@ -109,7 +107,7 @@ public class GpxTrackWriter implements TrackFormatWriter {
   }
 
   @Override
-  public void writeBeginTrack(Location firstLocation) {
+  public void writeBeginTrack(Track track, Location firstLocation) {
     if (printWriter != null) {
       printWriter.println("<trk>");
       printWriter.println("<name>" + StringUtils.formatCData(track.getName()) + "</name>");
@@ -120,7 +118,7 @@ public class GpxTrackWriter implements TrackFormatWriter {
   }
 
   @Override
-  public void writeEndTrack(Location lastLocation) {
+  public void writeEndTrack(Track track, Location lastLocation) {
     if (printWriter != null) {
       printWriter.println("</trk>");
     }

MyTracks/src/com/google/android/apps/mytracks/io/file/KmlTrackWriter.java

@@ -70,7 +70,6 @@ public class KmlTrackWriter implements TrackFormatWriter {
 
   private final Context context;
   private final DescriptionGenerator descriptionGenerator;
-  private Track track;
   private PrintWriter printWriter;
   private ArrayList<Integer> powerList = new ArrayList<Integer>();
   private ArrayList<Integer> cadenceList = new ArrayList<Integer>();
@@ -95,8 +94,7 @@ public class KmlTrackWriter implements TrackFormatWriter {
   }
 
   @Override
-  public void prepare(Track aTrack, OutputStream outputStream) {
-    this.track = aTrack;
+  public void prepare(OutputStream outputStream) {
     this.printWriter = new PrintWriter(outputStream);
   }
 
@@ -109,7 +107,7 @@ public class KmlTrackWriter implements TrackFormatWriter {
   }
 
   @Override
-  public void writeHeader() {
+  public void writeHeader(Track track) {
     if (printWriter != null) {
       printWriter.println("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
       printWriter.println("<kml xmlns=\"http://www.opengis.net/kml/2.2\"");
@@ -170,7 +168,7 @@ public class KmlTrackWriter implements TrackFormatWriter {
   }
 
   @Override
-  public void writeBeginTrack(Location firstLocation) {
+  public void writeBeginTrack(Track track, Location firstLocation) {
     if (printWriter != null) {
       String name = context.getString(R.string.marker_label_start, track.getName());
       writePlacemark(name, "", "", START_STYLE, firstLocation);
@@ -187,7 +185,7 @@ public class KmlTrackWriter implements TrackFormatWriter {
   }
 
   @Override
-  public void writeEndTrack(Location lastLocation) {
+  public void writeEndTrack(Track track, Location lastLocation) {
     if (printWriter != null) {
       printWriter.println("</gx:MultiTrack>");
       printWriter.println("</Placemark>");

MyTracks/src/com/google/android/apps/mytracks/io/file/TcxTrackWriter.java

@@ -84,7 +84,6 @@ public class TcxTrackWriter implements TrackFormatWriter {
       R.string.activity_type_walking };
 
   private final Context context;
-  private Track track;
   private PrintWriter printWriter;
   private SportType sportType;
 
@@ -93,10 +92,8 @@ public class TcxTrackWriter implements TrackFormatWriter {
   }
 
   @Override
-  public void prepare(Track aTrack, OutputStream out) {
-    this.track = aTrack;
+  public void prepare(OutputStream out) {
     this.printWriter = new PrintWriter(out);
-    this.sportType = getSportType(track.getCategory());
   }
 
   @Override
@@ -113,7 +110,7 @@ public class TcxTrackWriter implements TrackFormatWriter {
   }
 
   @Override
-  public void writeHeader() {
+  public void writeHeader(Track track) {
     if (printWriter != null) {
       printWriter.println("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
       printWriter.println("<TrainingCenterDatabase"
@@ -144,7 +141,8 @@ public class TcxTrackWriter implements TrackFormatWriter {
   }
 
   @Override
-  public void writeBeginTrack(Location firstPoint) {
+  public void writeBeginTrack(Track track, Location firstPoint) {
+    sportType = getSportType(track.getCategory());
     if (printWriter != null) {
       String startTime = StringUtils.formatDateTimeIso8601(
           track.getTripStatistics().getStartTime());
@@ -165,7 +163,7 @@ public class TcxTrackWriter implements TrackFormatWriter {
   }
 
   @Override
-  public void writeEndTrack(Location lastPoint) {
+  public void writeEndTrack(Track track, Location lastPoint) {
     if (printWriter != null) {
       printWriter.println("</Lap>");
       printWriter.println("<Notes>" + StringUtils.formatCData(track.getDescription()) + "</Notes>");

MyTracks/src/com/google/android/apps/mytracks/io/file/TrackFormatWriter.java

@@ -23,26 +23,30 @@ import android.location.Location;
 import java.io.OutputStream;
 
 /**
- * Interface for writing a track to file.
+ * Interface for writing tracks to a file.
  *
  * The expected sequence of calls is:
- * <ol>
- *   <li>{@link #prepare}
- *   <li>{@link #writeHeader}
- *   <li>{@link #writeBeginWaypoints}
- *   <li>For each waypoint: {@link #writeWaypoint}
- *   <li>{@link #writeEndWaypoints}
- *   <li>{@link #writeBeginTrack}
- *   <li>For each segment:
- *   <ol>
- *     <li>{@link #writeOpenSegment}
- *     <li>For each location in the segment: {@link #writeLocation}
- *     <li>{@link #writeCloseSegment}
- *   </ol>
- *   <li>{@link #writeEndTrack}
- *   <li>{@link #writeFooter}
- *   <li>{@link #close}
- * </ol>
+ * <ul>
+ *   <li>{@link #prepare}</li>
+ *   <li>{@link #writeHeader}</li>
+ *   <li>For each track:</li>
+ *   <ul>
+ *     <li>{@link #writeBeginWaypoints}
+ *     <li>For each waypoint: {@link #writeWaypoint}
+ *     <li>{@link #writeEndWaypoints}
+ *     <li>{@link #writeBeginTrack}
+ *     <li>For each segment:
+ *       <ul>
+ *         <li>{@link #writeOpenSegment}</li>
+ *         <li>For each location in the segment: {@link #writeLocation}</li>
+ *         <li>{@link #writeCloseSegment}</li>
+ *       </ul>
+ *     </li>
+ *     <li>{@link #writeEndTrack}</li>
+ *   </ul>   
+ *   <li>{@link #writeFooter}</li>
+ *   <li>{@link #close}</li>
+ * </ul>
  *
  * @author Rodrigo Damazio
  */
@@ -54,12 +58,11 @@ public interface TrackFormatWriter {
   public String getExtension();
 
   /**
-   * Sets up the writer to write the given track.
+   * Sets up the file handler.
    *
-   * @param track the track to write
-   * @param outputStream the output stream to write the track to
+   * @param outputStream the output stream for the file handler
    */
-  public void prepare(Track track, OutputStream outputStream);
+  public void prepare(OutputStream outputStream);
 
   /**
    * Closes the underlying file handler.
@@ -67,9 +70,11 @@ public interface TrackFormatWriter {
   public void close();
 
   /**
-   * Writes the header.
+   * Writes the header for a file
+   * 
+   * @param track the track
    */
-  public void writeHeader();
+  public void writeHeader(Track track);
 
   /**
    * Writes the footer.
@@ -96,16 +101,18 @@ public interface TrackFormatWriter {
   /**
    * Writes the beginning of the track.
    * 
+   * @param track the track
    * @param firstLocation the first location
    */
-  public void writeBeginTrack(Location firstLocation);
+  public void writeBeginTrack(Track track, Location firstLocation);
 
   /**
    * Writes the end of the track.
    * 
+   * @param track the track
    * @param lastLocation the last location
    */
-  public void writeEndTrack(Location lastLocation);
+  public void writeEndTrack(Track track, Location lastLocation);
 
   /**
    * Writes the statements necessary to open a new segment.

MyTracks/src/com/google/android/apps/mytracks/io/file/TrackWriter.java

@@ -105,8 +105,8 @@ public class TrackWriter {
         @Override
       public void run() {
         try {
-          trackFormatWriter.prepare(track, outputStream);
-          trackFormatWriter.writeHeader();
+          trackFormatWriter.prepare(outputStream);
+          trackFormatWriter.writeHeader(track);
           writeWaypoints();
           writeLocations();
           trackFormatWriter.writeFooter();
@@ -206,7 +206,7 @@ public class TrackWriter {
         boolean isSegmentValid = isLocationValid && isLastLocationValid;
         if (!wroteTrack && isSegmentValid) {
           // Found the first two consecutive locations that are valid
-          trackFormatWriter.writeBeginTrack(locationFactory.lastLocation);
+          trackFormatWriter.writeBeginTrack(track, locationFactory.lastLocation);
           wroteTrack = true;
         }
 
@@ -241,11 +241,11 @@ public class TrackWriter {
       }
       if (wroteTrack) {
         Location lastValidTrackPoint = myTracksProviderUtils.getLastValidTrackPoint(track.getId());
-        trackFormatWriter.writeEndTrack(lastValidTrackPoint);
+        trackFormatWriter.writeEndTrack(track, lastValidTrackPoint);
       } else {
         // Write an empty track
-        trackFormatWriter.writeBeginTrack(null);
-        trackFormatWriter.writeEndTrack(null);
+        trackFormatWriter.writeBeginTrack(track, null);
+        trackFormatWriter.writeEndTrack(track, null);
       }
     } finally {
       iterator.close();