X-Git-Url: http://gitweb.fperrin.net/?p=GpsPrune.git;a=blobdiff_plain;f=src%2Ftim%2Fprune%2Fdata%2Fsort%2FWaypointComparer.java;fp=src%2Ftim%2Fprune%2Fdata%2Fsort%2FWaypointComparer.java;h=b1c3e2ad9e1919e33016d2b0b0efd8d3eeece986;hp=0000000000000000000000000000000000000000;hb=ce6f2161b8596f7018d6a76bff79bc9e571f35fd;hpb=2d8cb72e84d5cc1089ce77baf1e34ea3ea2f8465

diff --git a/src/tim/prune/data/sort/WaypointComparer.java b/src/tim/prune/data/sort/WaypointComparer.java
new file mode 100644
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;
+	}
+}