Wicket and backend validations

We have validation rules written in Drools at a backend. Rules are written against Domain model.

We would like to have rules at one place only. S开发者_JAVA技巧o we have created class which looks like:

    public class ModelItem<T> {

        private String userInput;
        private T value;
        ....
}

And we've extended converters so If conversion cannot be done then we store value in "userInput".

Is there any built-in way how to perform backend validations instead of default wicket validators?

Which concept do you use?

you can force wicket to user BeanValidation (JSR-303). I have not used this yet, but heard from others that it does well

http://carinae.net/2009/12/integration-of-jsr-303-bean-validation-standard-and-wicket-1-4/