--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/artifacts/src/main/java/org/dive4elements/river/artifacts/model/CrossSectionWaterLineFacet.java	Thu Apr 25 15:23:37 2013 +0200
@@ -0,0 +1,101 @@
+package org.dive4elements.river.artifacts.model;
+
+import org.apache.log4j.Logger;
+
+import java.util.List;
+
+import org.dive4elements.artifacts.Artifact;
+import org.dive4elements.artifacts.CallContext;
+import org.dive4elements.artifacts.DataProvider;
+
+import org.dive4elements.artifactdatabase.state.Facet;
+
+import org.dive4elements.river.artifacts.WaterLineArtifact;
+
+import org.dive4elements.river.model.FastCrossSectionLine;
+
+import org.dive4elements.river.artifacts.geom.Lines;
+
+
+/**
+ * Facet for Waterlines in Cross Sections.
+ */
+public class CrossSectionWaterLineFacet
+extends      BlackboardDataFacet
+implements   FacetTypes {
+
+    /** Private logger to use. */
+    private static Logger logger =
+        Logger.getLogger(CrossSectionWaterLineFacet.class);
+
+
+    /** Trivial constructor, set (maybe localized) description. */
+    public CrossSectionWaterLineFacet(int idx, String description) {
+        super(idx, CROSS_SECTION_WATER_LINE, description);
+    }
+
+
+    /**
+     * Trivial constructor, set (maybe localized) description.
+     * @param idx Index of this facet.
+     * @param name 'type' of this facet.
+     * @param description (maybe) localized user-visible description.
+     */
+    public CrossSectionWaterLineFacet(int idx, String name, String description) {
+        super(idx, name, description);
+    }
+
+
+    /**
+     * Gets waterline (crossed with cross section) of waterlevel.
+     */
+    public Object getData(Artifact artifact, CallContext context) {
+        logger.debug("Get data for cross section water line");
+
+        List<DataProvider> providers = context.
+            getDataProvider(CrossSectionFacet.BLACKBOARD_CS_MASTER_DATA);
+        if (providers.size() < 1) {
+            logger.warn("Could not find Cross-Section data provider.");
+            return new Lines.LineData(new double[][] {}, 0d, 0d);
+        }
+
+        Object crossSection = providers.get(0)
+            .provideData(CrossSectionFacet.BLACKBOARD_CS_MASTER_DATA,
+                null, context);
+        Object nextKm = providers.get(0).
+            provideData(CrossSectionFacet.BLACKBOARD_CS_NEXT_KM, null, context);
+        Object prevKm = providers.get(0).
+            provideData(CrossSectionFacet.BLACKBOARD_CS_PREV_KM, null, context);
+        if (prevKm == null)
+            prevKm = new Double(-1d);
+        if (nextKm == null)
+            nextKm = new Double(-1d);
+
+        if (!(artifact instanceof WaterLineArtifact)) {
+            logger.error("CrossSectionWaterLineFacet needs WaterLineArtifact");
+            return new Lines.LineData(new double[][] {}, 0d,0d);
+        }
+        WaterLineArtifact lineArtifact = (WaterLineArtifact) artifact;
+
+        if (crossSection != null) {
+            return lineArtifact.getWaterLines(this.getIndex(),
+                (FastCrossSectionLine) crossSection, (Double) nextKm,
+                (Double) prevKm, context);
+        }
+        else {
+            return new Lines.LineData(new double[][] {}, 0d,0d);
+        }
+    }
+
+
+    /** Do a deep copy. */
+    @Override
+    public Facet deepCopy() {
+        CrossSectionWaterLineFacet copy = new CrossSectionWaterLineFacet(
+            this.getIndex(),
+            this.description);
+        copy.set(this);
+        return copy;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :