public Long getTotalPhotos(Long idUser) {
      Long count = (Long) session.createQuery("select count(id_user) from Photo where user.id = :id")
      .setParameter("id", idUser)
      .uniqueResult();
      return count;
   }

public Integer getTotalPhotos(User user) {   
      
      Criteria crit = session.createCriteria(Photo.class);
      crit.add(Restrictions.eq("idUser", user.getIdUser()));
      crit.setProjection(Projections.rowCount());
       int count = ((Integer) crit.uniqueResult()).intValue();
      return count;
   }