Validating POJOs in Grails

Validation of POJOS on grails

grailsApplication.config.grails.validateable.classes.each {
    ValidationGrailsPlugin.addValidationMethods(grailsApplication, this.class.forName(it), null)
}

Example : 

public class Bean {
    @javax.validation.constraints.NotNull
    private Long id;
    @org.hibernate.validator.constraints.NotBlank
    private String text;
    //set...get...
}

And it just works ...