public void create(BarEntity bar) throws PreexistingEntityException, Exception {
EntityManager em = null;
try {
em = getEntityManager();
em.getTransaction().begin();
ContractEntity contract = bar.getContract();
if (contract != null) {
contract = em.getReference(contract.getClass(), contract.getId());
bar.setContract(contract);
}
em.persist(bar);
if (contract != null) {
contract.getBarCollection().add(bar);
contract = em.merge(contract);
}
em.getTransaction().commit();
} catch (Exception ex) {
if (findBar(bar.getId()) != null) {
throw new PreexistingEntityException("Bar " + bar + " already exists.", ex);
}
throw ex;
} finally {
if (em != null /*&& em.isOpen()*/) {
em.close();
}
}
}
public void edit(BarEntity bar) throws NonexistentEntityException, Exception {
EntityManager em = null;
try {
em = getEntityManager();
em.getTransaction().begin();
BarEntity persistentBar = em.find(BarEntity.class, bar.getId());
ContractEntity contractOld = persistentBar.getContract();
ContractEntity contractNew = bar.getContract();
if (contractNew != null) {
contractNew = em.getReference(contractNew.getClass(), contractNew.getId());
bar.setContract(contractNew);
}
bar = em.merge(bar);
if (contractOld != null && !contractOld.equals(contractNew)) {
contractOld.getBarCollection().remove(bar);
contractOld = em.merge(contractOld);
}
if (contractNew != null && !contractNew.equals(contractOld)) {
contractNew.getBarCollection().add(bar);
contractNew = em.merge(contractNew);
}
em.getTransaction().commit();
} catch (Exception ex) {
String msg = ex.getLocalizedMessage();
if (msg == null || msg.length() == 0) {
Integer id = bar.getId();
if (findBar(id) == null) {
throw new NonexistentEntityException("The bar with id " + id + " no longer exists.");
}
}
throw ex;
} finally {
if (em != null) {
em.close();
}
}
}