class urn_perun_facility_attribute_def_def_shells extends FacilityAttributesModuleAbstract implements FacilityAttributesModuleImplApi {

	@Override
	public void checkAttributeSemantics(PerunSessionImpl perunSession, Facility facility, Attribute attribute) throws WrongReferenceAttributeValueException {
		if (attribute.getValue() == null) throw new WrongReferenceAttributeValueException(attribute, "This attribute cannot be null.");
	}

}