--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/org/dive4elements/river/artifacts/model/FlowVelocityFilterFacet.java	Thu Apr 25 12:06:39 2013 +0200
@@ -0,0 +1,90 @@
+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.river.artifacts.FLYSArtifact;
+
+import org.dive4elements.river.artifacts.access.RiverAccess;
+import org.dive4elements.river.artifacts.context.FLYSContext;
+
+import org.dive4elements.river.artifacts.math.MovingAverage;
+import org.dive4elements.river.artifacts.states.DefaultState.ComputeType;
+
+import org.apache.log4j.Logger;
+
+/**
+ * Facet of a FlowVelocity curve.
+ */
+public class FlowVelocityFilterFacet extends DataFacet {
+
+    private static Logger logger = Logger.getLogger(FlowVelocityFilterFacet.class);
+
+    public FlowVelocityFilterFacet() {
+        // required for clone operation deepCopy()
+    }
+
+
+    public FlowVelocityFilterFacet(
+        int         idx,
+        String      name,
+        String      description,
+        ComputeType type,
+        String      stateId,
+        String      hash
+    ) {
+        super(idx, name, description, type, hash, stateId);
+    }
+
+
+    public Object getData(Artifact artifact, CallContext context) {
+        logger.debug("Get data for flow velocity at index: " + index);
+
+        Double start = (Double)context.getContextValue("startkm");
+        Double end = (Double)context.getContextValue("endkm");
+        FLYSArtifact flys = (FLYSArtifact) artifact;
+
+        CalculationResult res = (CalculationResult)
+            flys.compute(context, hash, stateId, type, false);
+
+        FlowVelocityData[] data = (FlowVelocityData[]) res.getData();
+        if(start != null && end != null) {
+            FLYSContext fc = (FLYSContext)context.globalContext();
+            ZoomScale scales = (ZoomScale)fc.get("zoomscale");
+            RiverAccess access = new RiverAccess((FLYSArtifact)artifact);
+            String river = access.getRiver();
+
+            double radius = scales.getRadius(river, start, end);
+            FlowVelocityData oldData = data[index];
+            FlowVelocityData newData = new FlowVelocityData();
+            double[][] q = oldData.getQPoints();
+            double[][] totalV = MovingAverage.weighted(oldData.getTotalChannelPoints(), radius);
+            double[][] mainV = MovingAverage.weighted(oldData.getMainChannelPoints(), radius);
+            double[][] tau = MovingAverage.weighted(oldData.getTauPoints(), radius);
+            for(int j = 0; j < q[0].length; j++) {
+                newData.addKM(q[0][j]);
+                newData.addQ(q[1][j]);
+                newData.addTauMain(tau[1][j]);
+                newData.addVMain(mainV[1][j]);
+                newData.addVTotal(totalV[1][j]);
+            }
+            return newData;
+        }
+        return data[index];
+    }
+
+
+    /** Copy deeply. */
+    @Override
+    public Facet deepCopy() {
+        FlowVelocityFilterFacet copy = new FlowVelocityFilterFacet();
+        copy.set(this);
+        copy.type    = type;
+        copy.hash    = hash;
+        copy.stateId = stateId;
+        return copy;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :