I have user value object class which has login info

along with that other 5 value obeject class extends user now if I implement crieteriaSearch as follows

public Object crieteriaSearchUser(userVo louserVo) {
Map<String, Object> loCrieSearch = new HashMap<String, Object>();

loCrit = sessionFactory.getCurrentSession().createCriteria( userVo.class);

if (!louserVo.getUserName().equals("") ) {
loCrit.add(Restrictions.like("userName",louserVo.g etUserName()+"%"));
}
loCrieSearch.put("allUserList", loCrit.list());
logger.debug("class Name :commonDo Function :crieteriaSearchDiscount Status : Exiting ");
return loCrieSearch;


it is going to exception saying that userName is not defined in other value object class which extends user class can anyone suggest solution for that
Thanks in advance