--- a/artifacts/src/main/java/org/dive4elements/river/artifacts/model/Range.java	Wed Jun 19 15:03:05 2013 +0200
+++ b/artifacts/src/main/java/org/dive4elements/river/artifacts/model/Range.java	Wed Jun 19 09:40:38 2013 +0200
@@ -69,5 +69,25 @@
     public boolean inside(double x) {
         return x > start-EPSILON && x < end+EPSILON;
     }
+
+    @Override
+    public int hashCode() {
+        return new Double(this.start).hashCode() ^
+               new Double(this.end).hashCode();
+    }
+
+    @Override
+    public boolean equals(Object otherRange) {
+        if (otherRange == null) {
+            return false;
+        }
+        else if (otherRange instanceof Range) {
+            Range oRange = (Range) otherRange;
+            return
+                Math.abs(oRange.start - this.start) <= EPSILON
+                && Math.abs(oRange.end - this.end) <= EPSILON;
+        }
+        return false;
+    }
 }
 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :