--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gnv/src/main/java/de/intevation/gnv/action/SwitchLanguageAction.java	Fri Apr 23 07:55:05 2010 +0000
@@ -0,0 +1,62 @@
+package de.intevation.gnv.action;
+
+import de.intevation.gnv.action.sessionmodel.SessionModel;
+import de.intevation.gnv.action.sessionmodel.SessionModelFactory;
+
+import java.util.Locale;
+
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import org.apache.log4j.Logger;
+
+import org.apache.struts.action.ActionForm;
+import org.apache.struts.action.ActionForward;
+import org.apache.struts.action.ActionMapping;
+
+/**
+ * Toggle the current language used to create the user interface. Two
+ * languages are available now - german and english.
+ *
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class SwitchLanguageAction extends DescribeUIAction {
+
+    public static Logger logger = Logger.getLogger(SwitchLanguageAction.class);
+
+    @Override
+    public ActionForward execute(
+        ActionMapping       mapping,
+        ActionForm          form,
+        HttpServletRequest  request,
+        HttpServletResponse response
+    ) throws Exception
+    {
+        SessionModelFactory factory = SessionModelFactory.getInstance();
+        SessionModel        sm      = factory.getSessionModel(request);
+
+        sm.setCurrentLocale(switchLanguage(sm.getCurrentLocale()));
+
+        return super.execute(mapping, form, request, response);
+    }
+
+
+    /**
+     * This method toggles between german and english language.
+     *
+     * @param currentLocale The locale which is currently used.
+     * @return an english locale, if the current locale is german - otherwise
+     * a german locale.
+     */
+    protected Locale switchLanguage(Locale currentLocale) {
+        if (currentLocale.getLanguage().equals(Locale.GERMAN.getLanguage())) {
+            logger.info("Switch from german to english locale.");
+            return Locale.ENGLISH;
+        }
+        else {
+            logger.info("Switch from english to german locale.");
+            return Locale.GERMAN;
+        }
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :