Moved source into separate src directory due to popular request

[GpsPrune.git] / src / tim / prune / data / sort / WaypointComparer.java

diff --git a/src/tim/prune/data/sort/WaypointComparer.java b/src/tim/prune/data/sort/WaypointComparer.java
new file mode 100644 (file)
index 0000000..b1c3e2a
--- /dev/null
+++ b/src/tim/prune/data/sort/WaypointComparer.java
@@ -0,0 +1,74 @@
+package tim.prune.data.sort;
+
+import java.util.Comparator;
+
+import tim.prune.data.DataPoint;
+
+
+/**
+ * Class for comparing waypoints to sort them by name or timestamp
+ */
+public class WaypointComparer implements Comparator<DataPoint>
+{
+       /** Sort mode */
+       private SortMode _sortMode;
+
+
+       /**
+        * Constructor
+        * @param inMode sort mode
+        */
+       public WaypointComparer(SortMode inMode)
+       {
+               _sortMode = inMode;
+       }
+
+       /**
+        * Main compare method
+        */
+       public int compare(DataPoint inP1, DataPoint inP2)
+       {
+               if (inP2 == null || !inP2.isWaypoint()) return -1; // all nulls at end
+               if (inP1 == null || !inP1.isWaypoint()) return 1;
+
+               // Sort by time, if requested
+               int result = 0;
+               if (_sortMode == SortMode.SORTBY_TIME) {
+                       result = compareTimes(inP1, inP2);
+               }
+               // check names if names requested or if times didn't work
+               if (result == 0) {
+                       result = inP1.getWaypointName().compareTo(inP2.getWaypointName());
+               }
+               // names and times equal, try longitude
+               if (result == 0) {
+                       result = inP1.getLongitude().getDouble() > inP2.getLongitude().getDouble() ? 1 : -1;
+               }
+               // and latitude
+               if (result == 0) {
+                       result = inP1.getLatitude().getDouble() > inP2.getLatitude().getDouble() ? 1 : -1;
+               }
+               return result;
+       }
+
+       /**
+        * Compare the timestamps of the two waypoints
+        * @param inP1 first point
+        * @param inP2 second point
+        * @return compare value (-1,0,1)
+        */
+       private int compareTimes(DataPoint inP1, DataPoint inP2)
+       {
+               // Points might not have timestamps
+               if (inP1.hasTimestamp() && !inP2.hasTimestamp()) return 1;
+               if (!inP1.hasTimestamp() && inP2.hasTimestamp()) return -1;
+               if (inP1.hasTimestamp() && inP2.hasTimestamp())
+               {
+                       // Compare the timestamps
+                       long secDiff = inP1.getTimestamp().getMillisecondsSince(inP2.getTimestamp());
+                       return (secDiff<0?-1:(secDiff==0?0:1));
+               }
+               // neither has a timestamp
+               return 0;
+       }
+}