@Retention(value=RUNTIME)
@Target(value={FIELD,METHOD})
public @interface UiRequired

Annotates the field should be 'required' in the UI. For example, should be displayed with a star after it and, depending on the target UI platform, have 'required' validators attached to it.

Note: Metawidget is designed to use existing annotations as much as possible. Clients should use something like javax.persistence.Column(nullable = false) or org.hibernate.validator.NotNull in preference to UiRequired.