--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-client/src/main/java/org/dive4elements/river/client/server/ThemeListingServiceImpl.java	Thu Apr 25 12:31:32 2013 +0200
@@ -0,0 +1,107 @@
+package de.intevation.flys.client.server;
+
+import com.google.gwt.user.server.rpc.RemoteServiceServlet;
+
+import de.intevation.artifacts.common.utils.XMLUtils;
+
+import de.intevation.artifacts.httpclient.exceptions.ConnectionException;
+
+import de.intevation.artifacts.httpclient.http.HttpClient;
+import de.intevation.artifacts.httpclient.http.HttpClientImpl;
+
+import de.intevation.flys.client.client.services.ThemeListingService;
+
+import de.intevation.flys.client.shared.exceptions.ServerException;
+
+import de.intevation.flys.client.shared.model.Style;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import javax.xml.xpath.XPathConstants;
+
+import org.apache.log4j.Logger;
+
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+import org.w3c.dom.NodeList;
+
+/**
+ * This interface provides a method to list themes filtered by name.
+ *
+ * @author <a href="mailto:raimund.renkert@intevation.de">Raimund Renkert</a>
+ */
+public class ThemeListingServiceImpl
+extends      RemoteServiceServlet
+implements   ThemeListingService
+{
+    private static final Logger logger =
+        Logger.getLogger(ThemeListingServiceImpl.class);
+
+
+    private static final String XPATH_THEME_GROUPS = "/themes/themegroup";
+    /** The error message key that is thrown if an error occured while reading
+     * the supported rivers from server.*/
+    public static final String ERROR_NO_GROUPS_FOUND = "error_no_groups_found";
+
+
+    public Map<String, Style> list(String locale, String name)
+    throws ServerException
+    {
+        String url = getServletContext().getInitParameter("server-url");
+
+        Document doc = XMLUtils.newDocument();
+
+        XMLUtils.ElementCreator ec = new XMLUtils.ElementCreator(
+            doc,
+            null,
+            null);
+
+        Element e = ec.create("theme");
+        ec.addAttr(e, "name", name);
+        doc.appendChild(e);
+        HttpClient client = new HttpClientImpl(url, locale);
+
+        try {
+            Document res = client.callService(url, "themelisting", doc);
+
+            NodeList themeGroups = (NodeList) XMLUtils.xpath(
+                res,
+                XPATH_THEME_GROUPS,
+                XPathConstants.NODESET,
+                null);
+
+            if (themeGroups == null || themeGroups.getLength() == 0) {
+                throw new ServerException(ERROR_NO_GROUPS_FOUND);
+            }
+
+            int count = themeGroups.getLength();
+
+            Map<String, Style> theStyles = new HashMap<String, Style>(count);
+
+            for (int i = 0; i < count; i++) {
+                Element tmp = (Element)themeGroups.item(i);
+
+                String groupName = tmp.getAttribute("name");
+                NodeList theTheme = (NodeList) XMLUtils.xpath(
+                    tmp,
+                    "theme",
+                    XPathConstants.NODESET,
+                    null);
+
+                for (int j = 0; j < theTheme.getLength(); j++) {
+                    Element elem = (Element) theTheme.item(j);
+                    theStyles.put(groupName, StyleHelper.getStyle(elem));
+                }
+            }
+
+            return theStyles;
+        }
+        catch (ConnectionException ce) {
+            logger.error(ce, ce);
+        }
+
+        throw new ServerException(ERROR_NO_GROUPS_FOUND);
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :