correct representation of enum literals as Java code, using valueOf

Change-Id: Ic9be5549a2ac6b26e5ffad96cf344a8cd2dd3ed9

java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/datamining/developer/QueryDefinitionParser.java

@@ -254,7 +254,7 @@ public class QueryDefinitionParser {
             return value.toString();
         }
         if (value instanceof Enum) {
-            return ((Enum<?>) value).name();
+            return value.getClass().getName()+".valueOf(\""+((Enum<?>) value).name()+"\")";
         }
         throw new IllegalArgumentException("Can't create literal for values of type " + value.getClass().getName());
     }