--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/artifacts/src/main/java/org/dive4elements/river/artifacts/model/sq/SQCurveFacet.java	Thu Apr 25 15:23:37 2013 +0200
@@ -0,0 +1,103 @@
+package org.dive4elements.river.artifacts.model.sq;
+
+import org.apache.log4j.Logger;
+
+import org.dive4elements.artifacts.Artifact;
+import org.dive4elements.artifacts.CallContext;
+
+import org.dive4elements.river.artifacts.FLYSArtifact;
+import org.dive4elements.river.artifacts.math.fitting.Function;
+import org.dive4elements.river.artifacts.math.fitting.FunctionFactory;
+import org.dive4elements.river.artifacts.model.CalculationResult;
+import org.dive4elements.river.artifacts.model.DataFacet;
+import org.dive4elements.river.artifacts.model.FacetTypes;
+import org.dive4elements.river.artifacts.model.Parameters;
+
+import org.dive4elements.river.artifacts.states.DefaultState.ComputeType;
+
+
+/**
+ * Facet to show the curve in a sq relation.
+ *
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class SQCurveFacet extends DataFacet implements FacetTypes {
+
+    private static final Logger log = Logger.getLogger(SQCurveFacet.class);
+
+
+    public static final String FUNCTION = "sq-pow";
+
+
+    private int fractionIdx;
+
+
+    public SQCurveFacet() {
+    }
+
+
+    public SQCurveFacet(
+        int    idx,
+        int    fractionIdx,
+        String name,
+        String description,
+        String hash,
+        String stateId
+    ) {
+        super(idx, name, description, ComputeType.ADVANCE, hash, stateId);
+        this.fractionIdx = fractionIdx;
+    }
+
+
+    @Override
+    public Object getData(Artifact artifact, CallContext context) {
+        log.debug("SQCurveFacet.getData");
+
+        if (!(artifact instanceof FLYSArtifact)) {
+            return null;
+        }
+
+        FLYSArtifact flys = (FLYSArtifact) artifact;
+
+        CalculationResult res = (CalculationResult) flys.compute(
+            context, ComputeType.ADVANCE, false);
+
+        SQResult[]       results = (SQResult[]) res.getData();
+        SQFractionResult result  = results[index].getFraction(fractionIdx);
+
+        Parameters params = result.getParameters();
+
+        if (params == null) {
+            log.debug("no parameters found");
+            return null;
+        }
+
+        Function func = FunctionFactory.getInstance().getFunction(FUNCTION);
+        String[] paramNames = func.getParameterNames();
+
+        double [] coeffs = params.get(0, paramNames);
+
+        if (log.isDebugEnabled()) {
+            for (int i = 0, N = paramNames.length; i < N; i++) {
+                log.debug("retrieved parameter " + paramNames[i] +
+                          " = " + coeffs[i]);
+            }
+        }
+
+        org.dive4elements.river.artifacts.math.Function mf =
+            func.instantiate(coeffs);
+
+        double [] extent = result.getQExtent();
+        return new SQFunction(mf, extent[0], extent[1]);
+    }
+
+
+    @Override
+    public SQCurveFacet deepCopy() {
+        SQCurveFacet copy = new SQCurveFacet();
+        copy.set(this);
+
+        return copy;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :