BZ-1040037 - Guided rule editor does not show editor widgets for method parameters

Author: Rikkola

drools-wb-screens/drools-wb-guided-rule-editor/drools-wb-guided-rule-editor-client/src/main/java/org/drools/workbench/screens/guided/rule/client/editor/MethodParameterValueEditor.java

@@ -103,7 +103,7 @@ public void valueChanged( String newText,
                                         enums ) );
         } else {
 
-            if ( methodParameter.getNature() == FieldNatureType.TYPE_UNDEFINED ) {
+            if ( methodParameter.getNature() == FieldNatureType.TYPE_UNDEFINED && methodParameter.getValue() == null ) {
                 // we have a blank slate..
                 // have to give them a choice
                 root.add( choice() );