--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gnv/src/main/java/de/intevation/gnv/action/DescribeUIAction.java	Fri Jan 22 11:28:25 2010 +0000
@@ -0,0 +1,131 @@
+package de.intevation.gnv.action;
+
+import de.intevation.gnv.action.sessionmodel.SessionModel;
+import de.intevation.gnv.action.sessionmodel.SessionModelFactory;
+
+import de.intevation.gnv.artifactdatabase.client.ArtifactDatabaseClient;
+import de.intevation.gnv.artifactdatabase.client.ArtifactDatabaseClientFactory;
+
+import de.intevation.gnv.artifactdatabase.objects.ArtifactDescription;
+
+import de.intevation.gnv.util.ArtifactNamespaceContext;
+import de.intevation.gnv.util.XMLUtils;
+import de.intevation.gnv.util.XSLTransformer;
+
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import javax.xml.xpath.XPathConstants;
+
+import org.apache.log4j.Logger;
+
+import org.apache.struts.action.ActionForm;
+import org.apache.struts.action.ActionForward;
+import org.apache.struts.action.ActionMapping;
+
+import org.w3c.dom.Node;
+
+/**
+ * @author Ingo Weinzierl (ingo.weinzierl@intevation.de)
+ */
+public class DescribeUIAction extends ArtifactDatabaseActionBase {
+
+    public static final String XPATH_DYNAMIC_UI = "art:dynamic";
+    public static final String XPATH_STATIC_UI  = "art:static";
+
+    public static final String XSL_SHEET_DYNAMIC =
+        "WEB-INF/config/templates/describe-ui.xsl";
+
+    public static final String XSL_SHEET_STATIC =
+        "WEB-INF/config/templates/describe-ui-static.xsl";
+
+    private static Logger logger = Logger.getLogger(DescribeUIAction.class);
+
+
+    public DescribeUIAction() {
+        super();
+    }
+
+
+    @Override
+    public ActionForward execute(
+        ActionMapping       mapping,
+        ActionForm          form,
+        HttpServletRequest  request,
+        HttpServletResponse response
+    ) throws Exception
+    {
+        logger.info("describe user interface");
+        try {
+            // render describe document and create user interface
+            SessionModel sm = SessionModelFactory.getInstance().getSessionModel(
+                request);
+
+            ArtifactDatabaseClient adc = ArtifactDatabaseClientFactory
+                .getInstance().getArtifactDatabaseClient(getLocale(request));
+
+            ArtifactDescription artifactDescription =
+                adc.getCurrentStepDescription(
+                    sm.getSelectedArtifactFactory(),
+                    sm.getCurrentArtifact(),
+                    true);
+
+            Node currentUI = artifactDescription.getCurrentUI();
+            if (currentUI != null) {
+                XSLTransformer transformer = new XSLTransformer();
+
+                String url = response.encodeURL(
+                    mapping.findForward("back").getPath());
+                transformer.addParameter("back-url", url);
+
+                String fisUrl = response.encodeURL(
+                    mapping.findForward("selectfis").getPath());
+                transformer.addParameter("selectfis", fisUrl);
+
+                // fetch dynamic part from describe document and transform it
+                Node dynamicNode = (Node) XMLUtils.xpath(
+                    currentUI,
+                    XPATH_DYNAMIC_UI,
+                    XPathConstants.NODE,
+                    ArtifactNamespaceContext.INSTANCE
+                );
+
+                String ui = transformer.transform(
+                    dynamicNode,
+                    "UTF-8",
+                    request.getRealPath(XSL_SHEET_DYNAMIC
+                ));
+
+                if (ui != null && ui.length() > 1)
+                    request.setAttribute("ui", ui);
+
+                // fetch static part from describe document and transform it
+                Node staticNode = (Node) XMLUtils.xpath(
+                    currentUI,
+                    XPATH_STATIC_UI,
+                    XPathConstants.NODE,
+                    ArtifactNamespaceContext.INSTANCE
+                );
+
+                String staticUI = transformer.transform(
+                    staticNode,
+                    "UTF-8",
+                    request.getRealPath(XSL_SHEET_STATIC));
+
+                if (staticUI != null && staticUI.length() > 1)
+                    request.setAttribute("staticui", staticUI); 
+            }
+
+            return super.execute(mapping, form, request, response);
+        }
+        catch (Exception e) {
+            logger.error(e, e);
+            request.setAttribute(
+                CommunicationKeys.REQUEST_EXCEPTION_MESSAGE_ID,
+                e.getMessage());
+
+            return super.getExceptionForward(mapping);
+        }
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :