--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/org/dive4elements/river/artifacts/model/HYKFacet.java	Thu Apr 25 12:06:39 2013 +0200
@@ -0,0 +1,78 @@
+package org.dive4elements.river.artifacts.model;
+
+import org.dive4elements.artifactdatabase.state.Facet;
+import org.dive4elements.artifacts.Artifact;
+import org.dive4elements.artifacts.CallContext;
+import org.dive4elements.artifacts.DataProvider;
+import org.dive4elements.river.artifacts.HYKArtifact;
+import org.dive4elements.river.artifacts.states.DefaultState.ComputeType;
+import org.dive4elements.river.model.FastCrossSectionLine;
+
+import java.util.List;
+
+import org.apache.log4j.Logger;
+
+
+/**
+ * Trival Facet for HYKs
+ */
+public class HYKFacet
+extends      DataFacet
+implements   FacetTypes {
+
+    /** House logger. */
+    private static Logger logger = Logger.getLogger(HYKFacet.class);
+
+    /** Trivial constructor, set (maybe localized) description. */
+    public HYKFacet(int idx, String description) {
+        super(idx, HYK, description, ComputeType.FEED, null, null);
+    }
+
+
+    /**
+     * Set km from cross section- master to HYKArtifact, then fire up
+     * computation.
+     *
+     * @param art artifact to get data from.
+     * @param context ignored
+     */
+     @Override
+    public Object getData(Artifact art, CallContext context) {
+        logger.debug("HYKFacet.getData");
+
+        String dataKey = CrossSectionFacet.BLACKBOARD_CS_MASTER_DATA;
+
+        List<DataProvider> providers = context.getDataProvider(dataKey);
+        if (providers.size() < 1) {
+            logger.warn("Could not find Cross-Section data provider to get master cs km.");
+            return null;
+        }
+
+        FastCrossSectionLine crossSection = (FastCrossSectionLine) providers.get(0)
+            .provideData(dataKey, null, context);
+
+        if(crossSection == null) {
+            logger.debug("getData: crossSection is null");
+            return null;
+        }
+
+        double km = crossSection.getKm();
+        logger.debug("HYKFacet.getData: Master Cross Section is at km: " + km);
+
+        // Set this km at hyk artifact to be evaluated.
+        HYKArtifact hyk = (HYKArtifact) art;
+        hyk.setKm(km);
+
+        return hyk.compute(context, hash, stateId, type, false);
+    }
+
+
+    /** Do a deep copy. */
+    @Override
+    public Facet deepCopy() {
+        HYKFacet copy = new HYKFacet(this.index, this.description);
+        copy.set(this);
+        return copy;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :