public List<Reservation> retrieveAll() {
em = factory.createEntityManager();
em.getTransaction().begin();
ReadAllQuery query = new ReadAllQuery();
Reservation obj = new Reservation();
query.setExampleObject(obj);
JpaEntityManager jpa = (JpaEntityManager) em.getDelegate();
List<Reservation> results =
(List<Reservation>) jpa.getServerSession().acquireClientSession().executeQuery(query);
return results;
}
