--- a/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/ReferenceCurveFacet.java	Fri Feb 10 12:09:36 2012 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/ReferenceCurveFacet.java	Fri Feb 10 12:41:12 2012 +0000
@@ -1,7 +1,8 @@
 package de.intevation.flys.artifacts.model;
 
+import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.List;
-import java.util.Arrays;
 
 import de.intevation.artifactdatabase.state.Facet;
 
@@ -65,10 +66,10 @@
     @Override
     public void set(Facet other) {
         super.set(other);
-        ReferenceCurveFacet o= (ReferenceCurveFacet)other;
-        type    = o.type;
-        hash    = o.hash;
-        stateId = o.stateId;
+        ReferenceCurveFacet o = (ReferenceCurveFacet)other;
+        type                  = o.type;
+        hash                  = o.hash;
+        stateId               = o.stateId;
     }
 
     /** Copy deeply. */
@@ -80,7 +81,20 @@
     }
 
     @Override
-    public List getDataProviderKeys(Artifact art) {
+    public List getDataProviderKeys(Artifact art, CallContext context) {
+        // Answer to key only if x or y in meter...
+        List keys = new ArrayList();
+        // compute / get data
+        Object obj = context.getContextValue("reference.curve.axis.scale");
+
+        if (!(obj instanceof WWAxisTypes)) {
+            obj = new WWAxisTypes(getWWQQ(art, context));
+            context.putContextValue("reference.curve.axis.scale", obj);
+        }
+        else {
+            ((WWAxisTypes)obj).classify(getWWQQ(art, context));
+        }
+        // TODO we do not need to provide data
         return BLACK_BOARD_KEY_LIST;
     }
 
@@ -91,6 +105,7 @@
         Object      param,
         CallContext context
     ) {
+        // TODO we do not really need to provide data
         if (!key.equals(BLACK_BOARD_KEY)) {
             return null;
         }