Major Description
The processing of ValidatableProperty annotations in an external form bean does not go through the typical check() phase of the TwoPhaseCoreAnnotationProcessor. During the Controller annotation processing during the check() we run through the FormBeanChecker and specifically the ValidateTypeGrammar.onCheck(), for an inner form bean. However, if we have an external form bean class, the Controller annotation processing only looks at the external form bean during the generate() phase. Any errors in the ValidatableProperty annotations of the external form bean will cause processing problems without providing the kind user messages during the check() phase.
For example, if you have a ValidateType(type=String.class) you should see a message about using a primitive Class, e.g. int.class. However, you will get either an AssertionError or without asserts a ClassCastException in org.apache.beehive.netui.compiler.genmodel.DefaultValidatorRuleFactory.getFieldRule().
I will attach a repro case.