--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/utils/DataUtil.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,36 @@
+package de.intevation.flys.utils;
+
+import java.util.Random;
+
+import de.intevation.flys.artifacts.model.WKms;
+
+public class DataUtil
+{
+    // TODO: resolve duplicate in WQKms
+    public static boolean guessWaterIncreasing(WKms wkms) {
+        return guessWaterIncreasing(wkms, 0.05f);
+    }
+
+    // TODO: resolve duplicate in WQKms
+    public static boolean guessWaterIncreasing(WKms wkms, float factor) {
+        int N = wkms.size();
+        if (N < 2) return false;
+    
+        int samples = (int)(factor*N) + 1;
+    
+        int up = 0;
+    
+        Random rand = new Random();
+    
+        for (int i = 0; i < samples; ++i) {
+            int    pos2 = rand.nextInt(N-1) + 1;
+            if (pos2 == 0) continue;
+            int    pos1 = rand.nextInt(pos2);
+            double w1   = wkms.getW(pos1);
+            double w2   = wkms.getW(pos2);
+            if (w2 > w1) ++up;
+        }
+    
+        return up > samples/2;
+    }
+}