--- a/flys-artifacts/src/main/java/de/intevation/flys/artifacts/states/ReferenceCurveState.java	Fri Jan 27 15:43:04 2012 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/states/ReferenceCurveState.java	Fri Jan 27 17:17:45 2012 +0000
@@ -1,9 +1,68 @@
 package de.intevation.flys.artifacts.states;
 
+import de.intevation.artifactdatabase.state.Facet;
+
+import de.intevation.artifacts.CallContext;
+
+import de.intevation.flys.artifacts.FLYSArtifact;
+import de.intevation.flys.artifacts.WINFOArtifact;
+
+import de.intevation.flys.artifacts.model.CalculationResult;
+import de.intevation.flys.artifacts.model.FacetTypes;
+import de.intevation.flys.artifacts.model.ReportFacet;
+import de.intevation.flys.artifacts.model.WW;
+
+import java.util.List;
+
+import org.apache.log4j.Logger;
+
 public class ReferenceCurveState
 extends      DefaultState
+implements   FacetTypes
 {
+    private static Logger log = Logger.getLogger(ReferenceCurveState.class);
+
     public ReferenceCurveState() {
     }
+
+    @Override
+    public Object computeAdvance(
+        FLYSArtifact artifact,
+        String       hash,
+        CallContext  context,
+        List<Facet>  facets,
+        Object       old
+    ) {
+
+        if (!(artifact instanceof WINFOArtifact)) {
+            return null;
+        }
+
+        WINFOArtifact winfo = (WINFOArtifact)artifact;
+
+        CalculationResult res = old instanceof CalculationResult
+            ? (CalculationResult)old
+            : winfo.getReferenceCurveData();
+
+        if (facets == null) {
+            return res;
+        }
+
+        WW [] wws = (WW [])res.getData();
+
+        for (int i = 0; i < wws.length; ++i) {
+            // TODO: Add data facets.
+        }
+
+        if (wws.length > 0) {
+            // TODO: Add CSV/PDF facets.
+        }
+
+        if (res.getReport().hasProblems()) {
+            facets.add(new ReportFacet(ComputeType.ADVANCE, hash, id));
+        }
+
+        return res;
+    }
 }
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