Introduced TrackPoint.Id.

src/main/java/de/dennisguse/opentracks/content/TrackDataHub.java

@@ -83,8 +83,8 @@ public class TrackDataHub implements SharedPreferences.OnSharedPreferenceChangeL
 
     // Track points sampling state
     private int numLoadedPoints;
-    private long firstSeenTrackPointId;
-    private long lastSeenTrackPointId;
+    private TrackPoint.Id firstSeenTrackPointId;
+    private TrackPoint.Id lastSeenTrackPointId;
 
     // Registered listeners
     private ContentObserver tracksTableObserver;
@@ -351,36 +351,42 @@ public class TrackDataHub implements SharedPreferences.OnSharedPreferenceChangeL
         }
 
         int localNumLoadedTrackPoints = updateSamplingState ? numLoadedPoints : 0;
-        long localFirstSeenTrackPointId = updateSamplingState ? firstSeenTrackPointId : -1L;
-        long localLastSeenTrackPointIdId = updateSamplingState ? lastSeenTrackPointId : -1L;
-        long maxPointId = updateSamplingState ? -1L : lastSeenTrackPointId;
+        TrackPoint.Id localFirstSeenTrackPointId = updateSamplingState ? firstSeenTrackPointId : null;
+        TrackPoint.Id localLastSeenTrackPointIdId = updateSamplingState ? lastSeenTrackPointId : null;
+        TrackPoint.Id maxPointId = updateSamplingState ? null : lastSeenTrackPointId;
 
         if (selectedTrackId == null) {
             Log.w(TAG, "This should not happen, but it does"); //TODO
             return;
         }
 
-        long lastTrackPointId = contentProviderUtils.getLastTrackPointId(selectedTrackId);
+        TrackPoint.Id lastTrackPointId = contentProviderUtils.getLastTrackPointId(selectedTrackId);
         int samplingFrequency = -1;
         boolean includeNextPoint = false;
 
-        try (TrackPointIterator trackPointIterator = contentProviderUtils.getTrackPointLocationIterator(selectedTrackId, localLastSeenTrackPointIdId + 1)) {
+
+        TrackPoint.Id next;
+        if (localLastSeenTrackPointIdId != null) {
+            next = new TrackPoint.Id(localLastSeenTrackPointIdId.getId() + 1); //TODO startTrackPointId + 1 is an assumption assumption; should be derived from the DB.
+        }
+
+        try (TrackPointIterator trackPointIterator = contentProviderUtils.getTrackPointLocationIterator(selectedTrackId, null)) {
 
             while (trackPointIterator.hasNext()) {
                 TrackPoint trackPoint = trackPointIterator.next();
-                long trackPointId = trackPointIterator.getTrackPointId();
+                TrackPoint.Id trackPointId = trackPoint.getId();
 
                 // Stop if past the last wanted point
-                if (maxPointId != -1L && trackPointId > maxPointId) {
+                if (maxPointId != null && trackPointId.getId() > maxPointId.getId()) {
                     break;
                 }
 
-                if (localFirstSeenTrackPointId == -1) {
+                if (localFirstSeenTrackPointId == null) {
                     localFirstSeenTrackPointId = trackPointId;
                 }
 
                 if (samplingFrequency == -1) {
-                    long numTotalPoints = Math.max(0L, lastTrackPointId - localFirstSeenTrackPointId);
+                    long numTotalPoints = Math.max(0L, lastTrackPointId.getId() - localFirstSeenTrackPointId.getId()); //TODO That is an assumption; should be derived from the DB.
                     samplingFrequency = 1 + (int) (numTotalPoints / targetNumPoints);
                 }
 
@@ -421,8 +427,8 @@ public class TrackDataHub implements SharedPreferences.OnSharedPreferenceChangeL
      */
     private void resetSamplingState() {
         numLoadedPoints = 0;
-        firstSeenTrackPointId = -1L;
-        lastSeenTrackPointId = -1L;
+        firstSeenTrackPointId = null;
+        lastSeenTrackPointId = null;
     }
 
     /**

src/main/java/de/dennisguse/opentracks/content/data/Marker.java

@@ -82,8 +82,8 @@ public final class Marker {
     /**
      * May be null if the it was not loaded from the database.
      */
-    public @Nullable
-    Id getId() {
+    @Nullable
+    public Id getId() {
         return id;
     }
 
@@ -123,8 +123,8 @@ public final class Marker {
         this.icon = icon;
     }
 
-    public @NonNull
-    Track.Id getTrackId() {
+    @NonNull
+    public Track.Id getTrackId() {
         return trackId;
     }
 
@@ -144,8 +144,8 @@ public final class Marker {
         this.duration = duration;
     }
 
-    public @NonNull
-    Location getLocation() {
+    @NonNull
+    public Location getLocation() {
         return location;
     }
 

src/main/java/de/dennisguse/opentracks/content/data/Track.java

@@ -52,8 +52,8 @@ public class Track {
     /**
      * May be null if the track was not loaded from the database.
      */
-    public @Nullable
-    Id getId() {
+    @Nullable
+    public Id getId() {
         return id;
     }
 

src/main/java/de/dennisguse/opentracks/content/data/TrackPoint.java

@@ -17,16 +17,23 @@ package de.dennisguse.opentracks.content.data;
 
 import android.location.Location;
 import android.location.LocationManager;
+import android.os.Parcel;
 
 import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+
+import java.util.Objects;
 
 /**
  * This class extends the standard Android location with extra information.
  *
  * @author Sandor Dornbush
  */
+//TODO Merge constructors by use case; we have too many.
 public class TrackPoint {
 
+    private TrackPoint.Id id;
+
     private final Location location;
 
     private Float heartRate_bpm = null;
@@ -92,8 +99,20 @@ public class TrackPoint {
         return new TrackPoint(resume);
     }
 
-    public @NonNull
-    Location getLocation() {
+    /**
+     * May be null if the track was not loaded from the database.
+     */
+    @Nullable
+    public TrackPoint.Id getId() {
+        return id;
+    }
+
+    public void setId(TrackPoint.Id id) {
+        this.id = id;
+    }
+
+    @Nullable
+    public Location getLocation() {
         return location;
     }
 
@@ -251,4 +270,41 @@ public class TrackPoint {
     public String toString() {
         return "time=" + getTime() + ": lat=" + getLatitude() + " lng=" + getLongitude() + " acc=" + getAccuracy();
     }
+
+    public static class Id {
+
+        private final long id;
+
+        public Id(long id) {
+            this.id = id;
+        }
+
+        protected Id(Parcel in) {
+            id = in.readLong();
+        }
+
+        //TOOD Limit visibility to TrackRecordingService / ContentProvider
+        public long getId() {
+            return id;
+        }
+
+        @Override
+        public boolean equals(Object o) {
+            if (this == o) return true;
+            if (o == null || getClass() != o.getClass()) return false;
+            TrackPoint.Id id1 = (TrackPoint.Id) o;
+            return id == id1.id;
+        }
+
+        @Override
+        public int hashCode() {
+            return Objects.hash(id);
+        }
+
+        @NonNull
+        @Override
+        public String toString() {
+            return String.valueOf(id);
+        }
+    }
 }

src/main/java/de/dennisguse/opentracks/content/provider/ContentProviderUtils.java

@@ -545,6 +545,9 @@ public class ContentProviderUtils {
      */
     static TrackPoint fillTrackPoint(Cursor cursor, CachedTrackPointsIndexes indexes) {
         TrackPoint trackPoint = new TrackPoint();
+        if (!cursor.isNull(indexes.longitudeIndex)) {
+            trackPoint.setId(new TrackPoint.Id(cursor.getInt(indexes.idIndex)));
+        }
 
         if (!cursor.isNull(indexes.longitudeIndex)) {
             trackPoint.setLongitude(((double) cursor.getInt(indexes.longitudeIndex)) / 1E6);
@@ -622,15 +625,15 @@ public class ContentProviderUtils {
      * @param trackId the track id
      */
     @Deprecated
-    public long getLastTrackPointId(@NonNull Track.Id trackId) {
+    public TrackPoint.Id getLastTrackPointId(@NonNull Track.Id trackId) {
         String selection = TrackPointsColumns._ID + "=(SELECT MAX(" + TrackPointsColumns._ID + ") from " + TrackPointsColumns.TABLE_NAME + " WHERE " + TrackPointsColumns.TRACKID + "=?)";
         String[] selectionArgs = new String[]{Long.toString(trackId.getId())};
         try (Cursor cursor = getTrackPointCursor(new String[]{TrackPointsColumns._ID}, selection, selectionArgs, TrackPointsColumns._ID)) {
             if (cursor != null && cursor.moveToFirst()) {
-                return cursor.getLong(cursor.getColumnIndexOrThrow(TrackPointsColumns._ID));
+                return new TrackPoint.Id(cursor.getLong(cursor.getColumnIndexOrThrow(TrackPointsColumns._ID)));
             }
         }
-        return -1L;
+        return null;
     }
 
     /**
@@ -640,15 +643,15 @@ public class ContentProviderUtils {
      * @param location the location
      * @return trackPoint id if the location is in the track. -1L otherwise.
      */
-    public long getTrackPointId(Track.Id trackId, Location location) {
+    public TrackPoint.Id getTrackPointId(Track.Id trackId, Location location) {
         String selection = TrackPointsColumns._ID + "=(SELECT MAX(" + TrackPointsColumns._ID + ") FROM " + TrackPointsColumns.TABLE_NAME + " WHERE " + TrackPointsColumns.TRACKID + "=? AND " + TrackPointsColumns.TIME + "=?)";
         String[] selectionArgs = new String[]{Long.toString(trackId.getId()), Long.toString(location.getTime())};
         try (Cursor cursor = getTrackPointCursor(new String[]{TrackPointsColumns._ID}, selection, selectionArgs, TrackPointsColumns._ID)) {
             if (cursor != null && cursor.moveToFirst()) {
-                return cursor.getLong(cursor.getColumnIndexOrThrow(TrackPointsColumns._ID));
+                return new TrackPoint.Id(cursor.getLong(cursor.getColumnIndexOrThrow(TrackPointsColumns._ID)));
             }
         }
-        return -1L;
+        return null;
     }
 
     /**
@@ -667,12 +670,12 @@ public class ContentProviderUtils {
      * @param startTrackPointId the starting trackPoint id. `null` to ignore
      * @param maxLocations      maximum number of locations to return. `null` for no limit
      */
-    public Cursor getTrackPointCursor(Track.Id trackId, Long startTrackPointId, Integer maxLocations) {
+    public Cursor getTrackPointCursor(Track.Id trackId, TrackPoint.Id startTrackPointId, Integer maxLocations) {
         String selection;
         String[] selectionArgs;
         if (startTrackPointId != null) {
             selection = TrackPointsColumns.TRACKID + "=? AND " + TrackPointsColumns._ID + ">=?";
-            selectionArgs = new String[]{Long.toString(trackId.getId()), Long.toString(startTrackPointId)};
+            selectionArgs = new String[]{Long.toString(trackId.getId()), Long.toString(startTrackPointId.getId())};
         } else {
             selection = TrackPointsColumns.TRACKID + "=?";
             selectionArgs = new String[]{Long.toString(trackId.getId())};
@@ -765,7 +768,7 @@ public class ContentProviderUtils {
      * @param trackId           the track id
      * @param startTrackPointId the starting trackPoint id. `null` to ignore
      */
-    public TrackPointIterator getTrackPointLocationIterator(final Track.Id trackId, final Long startTrackPointId) {
+    public TrackPointIterator getTrackPointLocationIterator(final Track.Id trackId, final TrackPoint.Id startTrackPointId) {
         return new TrackPointIterator(this, trackId, startTrackPointId);
     }
 
@@ -794,7 +797,7 @@ public class ContentProviderUtils {
     public List<TrackPoint> getTrackPoints(Track.Id trackId) {
         List<TrackPoint> trackPoints = null;
 
-        try (Cursor trackPointCursor = getTrackPointCursor(trackId, -1L, -1)) {
+        try (Cursor trackPointCursor = getTrackPointCursor(trackId, null, null)) {
             if (trackPointCursor != null) {
                 trackPointCursor.moveToFirst();
                 trackPoints = new ArrayList<>(trackPointCursor.getCount());

src/main/java/de/dennisguse/opentracks/content/provider/TrackPointIterator.java

@@ -19,11 +19,11 @@ public class TrackPointIterator implements Iterator<TrackPoint>, AutoCloseable {
     private final ContentProviderUtils contentProviderUtils;
     private final Track.Id trackId;
     private final CachedTrackPointsIndexes indexes;
-    private long lastTrackPointId = -1L;
+    private TrackPoint.Id lastTrackPointId = null;
     private Cursor cursor;
 
 
-    public TrackPointIterator(ContentProviderUtils contentProviderUtils, Track.Id trackId, Long startTrackPointId) {
+    public TrackPointIterator(ContentProviderUtils contentProviderUtils, Track.Id trackId, TrackPoint.Id startTrackPointId) {
         this.contentProviderUtils = contentProviderUtils;
         this.trackId = trackId;
 
@@ -37,7 +37,7 @@ public class TrackPointIterator implements Iterator<TrackPoint>, AutoCloseable {
      *
      * @param trackPointId the starting track point id
      */
-    private Cursor getCursor(long trackPointId) {
+    private Cursor getCursor(TrackPoint.Id trackPointId) {
         return contentProviderUtils.getTrackPointCursor(trackId, trackPointId, contentProviderUtils.getDefaultCursorBatchSize());
     }
 
@@ -45,17 +45,13 @@ public class TrackPointIterator implements Iterator<TrackPoint>, AutoCloseable {
      * Advances the cursor to the next batch. Returns true if successful.
      */
     private boolean advanceCursorToNextBatch() {
-        long trackPointId = lastTrackPointId == -1L ? -1L : lastTrackPointId + 1;
+        TrackPoint.Id trackPointId = lastTrackPointId == null ? null : new TrackPoint.Id(lastTrackPointId.getId() + 1);
         Log.d(TAG, "Advancing track point id: " + trackPointId);
         cursor.close();
         cursor = getCursor(trackPointId);
         return cursor != null;
     }
 
-    public long getTrackPointId() {
-        return lastTrackPointId;
-    }
-
     @Override
     public boolean hasNext() {
         if (cursor == null) {
@@ -83,7 +79,7 @@ public class TrackPointIterator implements Iterator<TrackPoint>, AutoCloseable {
                 throw new NoSuchElementException();
             }
         }
-        lastTrackPointId = cursor.getLong(indexes.idIndex);
+        lastTrackPointId = new TrackPoint.Id(cursor.getLong(indexes.idIndex));
         return ContentProviderUtils.fillTrackPoint(cursor, indexes);
     }
 

src/main/java/de/dennisguse/opentracks/io/file/exporter/FileTrackExporter.java

@@ -126,7 +126,7 @@ public class FileTrackExporter implements TrackExporter {
         boolean isLastLocationValid = false;
         TrackPoint lastTrackPoint = null;
 
-        try (TrackPointIterator trackPointIterator = contentProviderUtils.getTrackPointLocationIterator(track.getId(), -1L)) {
+        try (TrackPointIterator trackPointIterator = contentProviderUtils.getTrackPointLocationIterator(track.getId(), null)) {
 
             while (trackPointIterator.hasNext()) {
                 if (Thread.interrupted()) {

src/main/java/de/dennisguse/opentracks/io/file/exporter/KmlTrackWriter.java

@@ -398,8 +398,8 @@ public class KmlTrackWriter implements TrackWriter {
      * @param location the location
      */
     private float getHeading(Track.Id trackId, Location location) {
-        long trackPointId = contentProviderUtils.getTrackPointId(trackId, location);
-        if (trackPointId == -1L) {
+        TrackPoint.Id trackPointId = contentProviderUtils.getTrackPointId(trackId, location);
+        if (trackPointId == null) {
             return location.getBearing();
         }
         TrackPoint viewLocation = contentProviderUtils.getLastValidTrackPoint(trackId);

src/main/java/de/dennisguse/opentracks/io/file/importer/AbstractFileTrackImporter.java

@@ -160,7 +160,7 @@ abstract class AbstractFileTrackImporter extends DefaultHandler implements Track
         // TODO Should not be necessary anymore?
         TrackStatisticsUpdater markerTrackStatisticsUpdater = new TrackStatisticsUpdater(track.getTrackStatistics().getStartTime_ms());
 
-        try (TrackPointIterator trackPointIterator = contentProviderUtils.getTrackPointLocationIterator(track.getId(), -1L)) {
+        try (TrackPointIterator trackPointIterator = contentProviderUtils.getTrackPointLocationIterator(track.getId(), null)) {
 
             while (true) {
                 if (marker == null) {

src/main/java/de/dennisguse/opentracks/services/TrackRecordingService.java

@@ -352,7 +352,7 @@ public class TrackRecordingService extends Service implements HandlerServer.Hand
 
         trackStatisticsUpdater = new TrackStatisticsUpdater(track.getTrackStatistics().getStartTime_ms());
 
-        try (TrackPointIterator trackPointIterator = contentProviderUtils.getTrackPointLocationIterator(track.getId(), -1L)) {
+        try (TrackPointIterator trackPointIterator = contentProviderUtils.getTrackPointLocationIterator(track.getId(), null)) {
             trackStatisticsUpdater.addTrackPoint(trackPointIterator, recordingDistanceInterval);
         } catch (RuntimeException e) {
             Log.e(TAG, "RuntimeException", e);