--- a/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/WaterlevelFacet.java	Wed Jul 25 09:53:24 2012 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/WaterlevelFacet.java	Wed Jul 25 09:59:43 2012 +0000
@@ -5,12 +5,16 @@
 import de.intevation.artifacts.Artifact;
 import de.intevation.artifacts.CallContext;
 
+import de.intevation.flys.artifacts.FixationArtifact;
 import de.intevation.flys.artifacts.FLYSArtifact;
 
 import de.intevation.flys.artifacts.states.DefaultState.ComputeType;
 
+import de.intevation.flys.artifacts.model.fixings.FixRealizingResult;
+
 import org.apache.log4j.Logger;
 
+
 /**
  * Facet of a Waterlevel (WQKms).
  */
@@ -49,12 +53,31 @@
                 " /stateId: " + stateId);
         }
 
-        FLYSArtifact winfo = (FLYSArtifact)artifact;
+        FLYSArtifact winfo = (FLYSArtifact) artifact;
 
         CalculationResult res = (CalculationResult)
             winfo.compute(context, hash, stateId, type, false);
 
-        WQKms [] wqkms = (WQKms [])res.getData();
+        if (res == null) {
+            logger.error("WaterlevelFacet.getData: null result");
+            return null;
+        }
+
+        if (winfo == null) {
+            logger.error("WaterlevelFacet.getData: artifact is null");
+            return null;
+        }
+
+        if (winfo instanceof FixationArtifact) {
+            FixRealizingResult fr = (FixRealizingResult) res.getData();
+            if (fr == null || fr.getWQKms() == null) {
+                logger.error("WaterlevelFacet.getData: " +
+                    " corrupted FixationArtifact result.");
+            }
+            return fr.getWQKms()[index];
+        }
+
+        WQKms [] wqkms = (WQKms []) res.getData();
 
         return wqkms[index];
     }