X-Git-Url: http://wamblee.org/gitweb/?a=blobdiff_plain;f=gps%2Fsrc%2Fmain%2Fjava%2Forg%2Fwamblee%2Fgps%2Ftrack%2FFilteredTrack.java;fp=gps%2Fsrc%2Fmain%2Fjava%2Forg%2Fwamblee%2Fgps%2Ftrack%2FFilteredTrack.java;h=ddcaa4964adb40b09098e8f8d3060948dd68af77;hb=47fdbaa9f2527531947249ad605845f25056b587;hp=0000000000000000000000000000000000000000;hpb=698d0d066b8cc06d28c3cc9160ed0d897ac44606;p=utils

diff --git a/gps/src/main/java/org/wamblee/gps/track/FilteredTrack.java b/gps/src/main/java/org/wamblee/gps/track/FilteredTrack.java
new file mode 100644
index 00000000..ddcaa496
--- /dev/null
+++ b/gps/src/main/java/org/wamblee/gps/track/FilteredTrack.java
@@ -0,0 +1,63 @@
+package org.wamblee.gps.track;
+
+import java.util.List;
+
+import org.wamblee.gps.geometry.Point;
+
+/**
+ * Filtered track provides a filtered view on a track. 
+ * Changes in the filter are also represented by the filtered track. 
+ */
+public class FilteredTrack implements Track {
+    
+    private TrackFilter _filter; 
+    private Track _originalTrack;
+    private Track _filteredTrack; 
+    private int _lastVersion; 
+    
+    public FilteredTrack(TrackFilter aFilter, Track aTrack) { 
+        _filter = aFilter; 
+        _originalTrack = aTrack;
+        _filteredTrack = _filter.filter(_originalTrack);
+        _lastVersion = aFilter.version();
+    }
+    
+    private Track getTrack() { 
+        if ( _lastVersion != _filter.version()) { 
+            _filteredTrack = _filter.filter(_originalTrack);
+            _lastVersion = _filter.version();
+        }
+        return _filteredTrack;
+    }
+    
+    @Override
+    public List<TrackSegment> getSegments() {
+        return getTrack().getSegments();
+    }
+
+    @Override
+    public String getDescription() {
+        return getTrack().getDescription();
+    }
+
+    @Override
+    public double getMaxCoordinate(int aI) {
+        return getTrack().getMaxCoordinate(aI);
+    }
+
+    @Override
+    public double getMinCoordinate(int aI) {
+        return getTrack().getMinCoordinate(aI);
+    }
+
+    @Override
+    public Point getPoint(int aIndex) {
+        return getTrack().getPoint(aIndex);
+    }
+
+    @Override
+    public int size() {
+        return getTrack().size();
+    }
+
+}