--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/org/dive4elements/river/artifacts/WaterlevelArtifact.java	Thu Apr 25 12:06:39 2013 +0200
@@ -0,0 +1,122 @@
+package org.dive4elements.river.artifacts;
+
+import org.dive4elements.artifactdatabase.state.DefaultFacet;
+import org.dive4elements.artifactdatabase.state.Facet;
+import org.dive4elements.artifactdatabase.state.FacetActivity;
+
+import org.dive4elements.artifacts.Artifact;
+import org.dive4elements.artifacts.ArtifactFactory;
+import org.dive4elements.artifacts.CallMeta;
+
+import org.dive4elements.river.artifacts.states.DefaultState;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.log4j.Logger;
+
+import org.w3c.dom.Document;
+
+
+/**
+ * Clone of an WINFOArtifact to expose exactly one waterlevel only.
+ * All Facets of the "longitudinal_section" output will be added to the
+ * "w_differences" output and filterFacets adjusted accordingly.
+ *
+ * @TODO Straighten inheritance-line (waterlevel-WINFO or vice versa).
+ */
+public class WaterlevelArtifact extends WINFOArtifact {
+
+    /** The logger for this class. */
+    private static Logger logger = Logger.getLogger(WaterlevelArtifact.class);
+
+    /** The name of the artifact. */
+    public static final String ARTIFACT_NAME = "waterlevel";
+
+    static {
+        // TODO: Move to configuration.
+        FacetActivity.Registry.getInstance()
+            .register(ARTIFACT_NAME, FacetActivity.INACTIVE);
+    }
+
+    /**
+     * The default constructor.
+     */
+    public WaterlevelArtifact() {
+    }
+
+
+    /**
+     * Setup and restate longitudinal_section filterfacets to apply to the
+     * w_differences output, too. Also, for w_differences, add respective q-
+     * filter facets.
+     */
+    public void setup(
+        String          identifier,
+        ArtifactFactory factory,
+        Object          context,
+        CallMeta        callMeta,
+        Document        data)
+    {
+        super.setup(identifier, factory, context, callMeta, data);
+        // For w_differences, also allow q-facets.
+        if(filterFacets != null) {
+            List<Facet> list = new ArrayList<Facet>();
+            List<Facet> wlist = filterFacets.get(ChartType.LS);
+            if (wlist == null) {
+                logger.warn("No matching filterfacets found");
+                dumpFilterFacets();
+            } else {
+                for (Facet f: wlist) {
+                    if (!f.getName().equals(LONGITUDINAL_Q)) {
+                        DefaultFacet df = new DefaultFacet(f.getIndex(),
+                            "longitudinal_section.q", "");
+                        list.add(df);
+                    }
+                }
+
+                list.addAll(wlist);
+
+                filterFacets.put("w_differences", list);
+            }
+        }
+    }
+
+
+    /**
+     * Clone important stuff of an WINFOArtifact.
+     * @param artifact the WINFOArtifact to clone stuff from.
+     */
+    protected void initialize(
+        Artifact artifact,
+        Object context,
+        CallMeta meta)
+    {
+        WINFOArtifact winfo = (WINFOArtifact) artifact;
+        setData(winfo.cloneData());
+        logger.debug("Cloned data of winfo artifact.");
+        // Statically add Facets.
+        List<Facet> fs = new ArrayList<Facet>();
+        DefaultState state = (DefaultState) getCurrentState(context);
+        state.computeInit(this, hash(), context, meta, fs);
+        if (!fs.isEmpty()) {
+            logger.debug("Facets to add in WaterlevelArtifact.initialize .");
+            addFacets(getCurrentStateId(), fs);
+        }
+        else {
+            logger.debug("No facets to add in WaterlevelArtifact.initialize ("
+                + state.getID() + ").");
+        }
+    }
+
+
+    /**
+     * Returns the name of the concrete artifact.
+     *
+     * @return the name of the concrete artifact.
+     */
+    public String getName() {
+        return ARTIFACT_NAME;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :