move all comparators to a new package

extract interface and common implementation details of sorting

1 files changed, 65 insertions, 0 deletions

diff --git a/src/cgeo/geocaching/sorting/DistanceComparator.java b/src/cgeo/geocaching/sorting/DistanceComparator.java
new file mode 100644
index 0000000..fc7b712
--- /dev/null
+++ b/src/cgeo/geocaching/sorting/DistanceComparator.java
@@ -0,0 +1,65 @@
+package cgeo.geocaching.sorting;
+
+import cgeo.geocaching.cgBase;
+import cgeo.geocaching.cgCache;
+
+/**
+ * sorts caches by distance to current position
+ *
+ */
+public class DistanceComparator extends AbstractCacheComparator {
+	private Double latitude = null;
+	private Double longitude = null;
+
+	public DistanceComparator() {
+		// nothing
+	}
+
+	public DistanceComparator(Double latitudeIn, Double longitudeIn) {
+		setCoords(latitudeIn, longitudeIn);
+	}
+
+	public void setCoords(Double latitudeIn, Double longitudeIn) {
+		latitude = latitudeIn;
+		longitude = longitudeIn;
+	}
+
+	@Override
+	protected boolean canCompare(cgCache cache1, cgCache cache2) {
+		return true;
+	}
+
+	@Override
+	protected int compareCaches(final cgCache cache1, final cgCache cache2) {
+		if ((cache1.latitude == null || cache1.longitude == null
+				|| cache2.latitude == null || cache2.longitude == null)
+				&& cache1.distance != null && cache2.distance != null) {
+			if (cache1.distance < cache2.distance) {
+				return -1;
+			} else if (cache1.distance > cache2.distance) {
+				return 1;
+			} else {
+				return 0;
+			}
+		} else {
+			if (cache1.latitude == null || cache1.longitude == null) {
+				return 1;
+			}
+			if (cache2.latitude == null || cache2.longitude == null) {
+				return -1;
+			}
+
+			Double distance1 = cgBase.getDistance(latitude, longitude,
+					cache1.latitude, cache1.longitude);
+			Double distance2 = cgBase.getDistance(latitude, longitude,
+					cache2.latitude, cache2.longitude);
+
+			if (distance1 < distance2) {
+				return -1;
+			} else if (distance1 > distance2) {
+				return 1;
+			}
+		}
+		return 0;
+	}
+}