--- a/ChangeLog	Thu Jul 14 14:41:00 2011 +0000
+++ b/ChangeLog	Mon Jul 18 15:05:20 2011 +0000
@@ -1,3 +1,14 @@
+2011-07-18  Ingo Weinzierl <ingo@intevation.de>
+
+	* artifact-database/src/main/java/de/intevation/artifactdatabase/state/Facet.java,
+	  artifact-database/src/main/java/de/intevation/artifactdatabase/state/DefaultFacet.java:
+	  A facet can write its internal representation to XML using a public
+	  method toXML(Document).
+
+	* artifact-database/src/main/java/de/intevation/artifactdatabase/ProtocolUtils.java:
+	  Facets are appended using its toXML() method. Concrete facets can now
+	  change its xml representation.
+
 2011-07-14  Ingo Weinzierl <ingo@intevation.de>
 
 	* artifacts/src/main/java/de/intevation/artifacts/Hook.java: The Hook's

--- a/artifact-database/src/main/java/de/intevation/artifactdatabase/ProtocolUtils.java	Thu Jul 14 14:41:00 2011 +0000
+++ b/artifact-database/src/main/java/de/intevation/artifactdatabase/ProtocolUtils.java	Mon Jul 18 15:05:20 2011 +0000
@@ -9,9 +9,14 @@
 
 import java.util.List;
 
+import org.w3c.dom.Document;
 import org.w3c.dom.Element;
+import org.w3c.dom.Node;
+
+import de.intevation.artifacts.ArtifactNamespaceContext;
 
 import de.intevation.artifacts.common.utils.XMLUtils;
+import de.intevation.artifacts.common.utils.XMLUtils.ElementCreator;
 
 import de.intevation.artifactdatabase.state.Facet;
 import de.intevation.artifactdatabase.state.Output;
@@ -157,10 +162,15 @@
      * @param outputs The list of reachable outputs.
      */
     public static void appendOutputModes(
-        XMLUtils.ElementCreator creator,
-        Element                 out,
-        List<Output>            outputs)
+        Document     doc,
+        Element      out,
+        List<Output> outputs)
     {
+        ElementCreator creator = new ElementCreator(
+            doc,
+            ArtifactNamespaceContext.NAMESPACE_URI,
+            ArtifactNamespaceContext.NAMESPACE_PREFIX);
+
         for (Output o: outputs) {
             Element newOut = createArtNode(
                 creator,
@@ -173,7 +183,7 @@
                     o.getType() });
 
             Element facets = createArtNode(creator, "facets", null, null);
-            appendFacets(creator, facets, o.getFacets());
+            appendFacets(doc, facets, o.getFacets());
 
             newOut.appendChild(facets);
             out.appendChild(newOut);
@@ -190,26 +200,25 @@
      * @param facets The list of facets.
      */
     public static void appendFacets(
-        XMLUtils.ElementCreator creator,
-        Element                 facet,
-        List<Facet>             facets)
+        Document    doc,
+        Element     facet,
+        List<Facet> facets)
     {
         if (facets == null || facets.size() == 0) {
             return;
         }
 
+        ElementCreator creator = new ElementCreator(
+            doc,
+            ArtifactNamespaceContext.NAMESPACE_URI,
+            ArtifactNamespaceContext.NAMESPACE_PREFIX);
+
         for (Facet f: facets) {
-            Element newFacet = createArtNode(
-                creator,
-                "facet",
-                new String[] { "index", "name", "description" },
-                new String[] {
-                    String.valueOf(f.getIndex()),
-                    f.getName(),
-                    f.getDescription()
-                });
+            Node node = f.toXML(doc);
 
-            facet.appendChild(newFacet);
+            if (node != null) {
+                facet.appendChild(node);
+            }
         }
     }
 }

--- a/artifact-database/src/main/java/de/intevation/artifactdatabase/state/DefaultFacet.java	Thu Jul 14 14:41:00 2011 +0000
+++ b/artifact-database/src/main/java/de/intevation/artifactdatabase/state/DefaultFacet.java	Mon Jul 18 15:05:20 2011 +0000
@@ -1,8 +1,15 @@
 package de.intevation.artifactdatabase.state;
 
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+import org.w3c.dom.Node;
+
 import de.intevation.artifacts.Artifact;
+import de.intevation.artifacts.ArtifactNamespaceContext;
 import de.intevation.artifacts.CallContext;
 
+import de.intevation.artifacts.common.utils.XMLUtils.ElementCreator;
+
 
 /**
  * The default implementation of a Facet.
@@ -72,5 +79,20 @@
             .append(description).append("'")
             .toString();
     }
+
+
+    public Node toXML(Document doc) {
+        ElementCreator ec = new ElementCreator(
+            doc,
+            ArtifactNamespaceContext.NAMESPACE_URI,
+            ArtifactNamespaceContext.NAMESPACE_PREFIX);
+
+        Element facet = ec.create("facet");
+        ec.addAttr(facet, "description", description, true);
+        ec.addAttr(facet, "name", name, true);
+        ec.addAttr(facet, "index", String.valueOf(index), true);
+
+        return facet;
+    }
 }
 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :

--- a/artifact-database/src/main/java/de/intevation/artifactdatabase/state/Facet.java	Thu Jul 14 14:41:00 2011 +0000
+++ b/artifact-database/src/main/java/de/intevation/artifactdatabase/state/Facet.java	Mon Jul 18 15:05:20 2011 +0000
@@ -2,6 +2,9 @@
 
 import java.io.Serializable;
 
+import org.w3c.dom.Document;
+import org.w3c.dom.Node;
+
 import de.intevation.artifacts.Artifact;
 import de.intevation.artifacts.CallContext;
 
@@ -43,5 +46,15 @@
      * @return the data.
      */
     Object getData(Artifact artifact, CallContext context);
+
+
+    /**
+     * Write the internal representation of a facet to a node.
+     *
+     * @param doc A Document.
+     *
+     * @return the representation as Node.
+     */
+    Node toXML(Document doc);
 }
 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :