/**
* This test will demonstrate using a compound foreign key in a many-to-one, uni-directional
* relationship.
*/
@Test
public void testManyToOneUniCompoundFK() {
log.info("*** testManyToOneUniCompoundFK ***");
House house = new House(new HousePK(1600, "PA Ave"), "White House");
Occupant occupant = new Occupant("bo", house);
log.debug("persisting parent");
em.persist(house);
log.debug("persisting child");
em.persist(occupant);
em.flush();
log.debug("getting new instances");
em.clear();
Occupant occupant2 = em.find(Occupant.class, occupant.getId());
log.debug("checking child");
assertEquals("unexpected child data", occupant.getName(), occupant2.getName());
log.debug("checking parent");
assertEquals("unexpected parent data", house.getName(), occupant2.getResidence().getName());
log.debug("add more child entities");
Occupant occupantB = new Occupant("miss beazily", occupant2.getResidence());
em.persist(occupantB);
em.flush();
log.debug("getting new instances of children");
em.clear();
List<Occupant> occupants =
em.createQuery(
"select o from Occupant o " + "where o.residence.id=:houseId", Occupant.class)
.setParameter("houseId", occupant.getResidence().getId())
.getResultList();
assertEquals("unexpected number of children", 2, occupants.size());
}
