--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/artifacts/src/main/java/org/dive4elements/river/artifacts/sinfo/flowdepth/FlowDepthState.java	Thu Jan 18 18:34:41 2018 +0100
@@ -0,0 +1,140 @@
+/* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
+ * Software engineering by Intevation GmbH
+ *
+ * This file is Free Software under the GNU AGPL (>=v3)
+ * and comes with ABSOLUTELY NO WARRANTY! Check out the
+ * documentation coming with Dive4Elements River for details.
+ */
+
+package org.dive4elements.river.artifacts.sinfo.flowdepth;
+
+import java.util.List;
+
+import org.dive4elements.artifactdatabase.state.Facet;
+import org.dive4elements.artifacts.CallContext;
+import org.dive4elements.river.artifacts.ChartArtifact;
+import org.dive4elements.river.artifacts.D4EArtifact;
+import org.dive4elements.river.artifacts.model.Calculation;
+import org.dive4elements.river.artifacts.model.CalculationResult;
+import org.dive4elements.river.artifacts.model.DataFacet;
+import org.dive4elements.river.artifacts.model.EmptyFacet;
+import org.dive4elements.river.artifacts.model.FacetTypes;
+import org.dive4elements.river.artifacts.model.ReportFacet;
+import org.dive4elements.river.artifacts.resources.Resources;
+import org.dive4elements.river.artifacts.sinfo.SINFOArtifact;
+import org.dive4elements.river.artifacts.states.DefaultState;
+
+/** State in which a waterlevel has been calculated. */
+public class FlowDepthState
+extends      DefaultState
+{
+    /// ** The log that is used in this state. */
+    // private static Logger log = Logger.getLogger(FlowDepthState.class);
+
+    private static final String I18N_FACET_FLOW_DEPTH_FILTERED_DESCRIPTION = "sinfo.facet.flow_depth.filtered.description";
+
+    /**
+     * From this state can only be continued trivially.
+     */
+    @Override
+    protected String getUIProvider() {
+        return "continue";
+    }
+
+    @Override
+    public Object computeFeed(
+        final D4EArtifact artifact,
+        final String       hash,
+        final CallContext  context,
+        final List<Facet>  facets,
+        final Object       old
+    ) {
+    	// FIXME: why is this necessary?
+        if (artifact instanceof ChartArtifact) {
+            facets.add(new EmptyFacet());
+            return null;
+        }
+        return compute((SINFOArtifact) artifact, context, hash, facets, old);
+    }
+
+    @Override
+    public Object computeAdvance(
+    	final D4EArtifact artifact,
+    	final String       hash,
+    	final CallContext  context,
+    	final List<Facet>  facets,
+    	final Object       old
+    ) {
+        if (artifact instanceof ChartArtifact) {
+            facets.add(new EmptyFacet());
+            return null;
+        }
+        return compute((SINFOArtifact) artifact, context, hash, facets, old);
+    }
+    
+    /**
+     * Compute result or returned object from cache, create facets.
+     * @param old Object that was cached.
+     */
+    private Object compute(
+    	final SINFOArtifact sinfo,
+        final CallContext   context,
+        final String        hash,
+        final List<Facet>   facets,
+        final Object        old
+    ) {
+        final CalculationResult res;
+		if (old instanceof CalculationResult)
+			res = (CalculationResult) old;
+		else
+			res = new FlowDepthCalculation(context).calculate(sinfo);
+
+        if (facets == null) {
+            return res;
+        }
+
+        final FlowDepthCalculationResults results =  (FlowDepthCalculationResults) res.getData();
+
+        /* add themes for chart, for each result */
+        final List<FlowDepthCalculationResult> resultList = results.getResults();
+        for (int index = 0; index < resultList.size(); index++) {
+
+			final FlowDepthCalculationResult result = resultList.get(index);
+			/* compute theme label */
+			final String wspLabel = result.getWstLabel();
+			final String soundingLabel = result.getSoundingLabel();
+			final String inputLabel = String.format("%s - %s", wspLabel, soundingLabel);
+			
+			/* filtered (zoom dependent mean) flow depth */
+			final String facetFlowDepthFilteredDescription = Resources.getMsg( context.getMeta(), I18N_FACET_FLOW_DEPTH_FILTERED_DESCRIPTION, I18N_FACET_FLOW_DEPTH_FILTERED_DESCRIPTION, inputLabel );
+			facets.add(new FlowDepthFilterFacet(
+			        index,
+			        FlowDepthProcessor.FACET_FLOW_DEPTH_FILTERED,
+			        facetFlowDepthFilteredDescription,
+			        ComputeType.ADVANCE,
+			        id,
+			        hash
+			    ));
+			
+			// FIXME: add other themes
+		}
+
+        if (!resultList.isEmpty() ) {
+            Facet csv = new DataFacet(
+                FacetTypes.CSV, "CSV data", ComputeType.ADVANCE, hash, id);
+            Facet pdf = new DataFacet(
+            		FacetTypes.PDF, "PDF data", ComputeType.ADVANCE, hash, id);
+
+            facets.add(csv);
+            facets.add(pdf);
+        }
+
+        final Calculation report = res.getReport();
+
+        if (report.hasProblems()) {
+            facets.add(new ReportFacet(ComputeType.ADVANCE, hash, id));
+        }
+
+        return res;
+    }
+}
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