public void create(DiscountCode discountCode)
throws PreexistingEntityException, RollbackFailureException, Exception {
if (discountCode.getCustomerCollection() == null) {
discountCode.setCustomerCollection(new ArrayList<Customer>());
}
EntityManager em = null;
try {
utx.begin();
em = getEntityManager();
Collection<Customer> attachedCustomerCollection = new ArrayList<Customer>();
for (Customer customerCollectionCustomerToAttach : discountCode.getCustomerCollection()) {
customerCollectionCustomerToAttach =
em.getReference(
customerCollectionCustomerToAttach.getClass(),
customerCollectionCustomerToAttach.getCustomerId());
attachedCustomerCollection.add(customerCollectionCustomerToAttach);
}
discountCode.setCustomerCollection(attachedCustomerCollection);
em.persist(discountCode);
for (Customer customerCollectionCustomer : discountCode.getCustomerCollection()) {
DiscountCode oldDiscountCodeOfCustomerCollectionCustomer =
customerCollectionCustomer.getDiscountCode();
customerCollectionCustomer.setDiscountCode(discountCode);
customerCollectionCustomer = em.merge(customerCollectionCustomer);
if (oldDiscountCodeOfCustomerCollectionCustomer != null) {
oldDiscountCodeOfCustomerCollectionCustomer
.getCustomerCollection()
.remove(customerCollectionCustomer);
oldDiscountCodeOfCustomerCollectionCustomer =
em.merge(oldDiscountCodeOfCustomerCollectionCustomer);
}
}
utx.commit();
} catch (Exception ex) {
try {
utx.rollback();
} catch (Exception re) {
throw new RollbackFailureException(
"An error occurred attempting to roll back the transaction.", re);
}
if (findDiscountCode(discountCode.getDiscountCode()) != null) {
throw new PreexistingEntityException(
"DiscountCode " + discountCode + " already exists.", ex);
}
throw ex;
} finally {
if (em != null) {
em.close();
}
}
}
public void edit(DiscountCode discountCode)
throws IllegalOrphanException, NonexistentEntityException, RollbackFailureException,
Exception {
EntityManager em = null;
try {
utx.begin();
em = getEntityManager();
DiscountCode persistentDiscountCode =
em.find(DiscountCode.class, discountCode.getDiscountCode());
Collection<Customer> customerCollectionOld = persistentDiscountCode.getCustomerCollection();
Collection<Customer> customerCollectionNew = discountCode.getCustomerCollection();
List<String> illegalOrphanMessages = null;
for (Customer customerCollectionOldCustomer : customerCollectionOld) {
if (!customerCollectionNew.contains(customerCollectionOldCustomer)) {
if (illegalOrphanMessages == null) {
illegalOrphanMessages = new ArrayList<String>();
}
illegalOrphanMessages.add(
"You must retain Customer "
+ customerCollectionOldCustomer
+ " since its discountCode field is not nullable.");
}
}
if (illegalOrphanMessages != null) {
throw new IllegalOrphanException(illegalOrphanMessages);
}
Collection<Customer> attachedCustomerCollectionNew = new ArrayList<Customer>();
for (Customer customerCollectionNewCustomerToAttach : customerCollectionNew) {
customerCollectionNewCustomerToAttach =
em.getReference(
customerCollectionNewCustomerToAttach.getClass(),
customerCollectionNewCustomerToAttach.getCustomerId());
attachedCustomerCollectionNew.add(customerCollectionNewCustomerToAttach);
}
customerCollectionNew = attachedCustomerCollectionNew;
discountCode.setCustomerCollection(customerCollectionNew);
discountCode = em.merge(discountCode);
for (Customer customerCollectionNewCustomer : customerCollectionNew) {
if (!customerCollectionOld.contains(customerCollectionNewCustomer)) {
DiscountCode oldDiscountCodeOfCustomerCollectionNewCustomer =
customerCollectionNewCustomer.getDiscountCode();
customerCollectionNewCustomer.setDiscountCode(discountCode);
customerCollectionNewCustomer = em.merge(customerCollectionNewCustomer);
if (oldDiscountCodeOfCustomerCollectionNewCustomer != null
&& !oldDiscountCodeOfCustomerCollectionNewCustomer.equals(discountCode)) {
oldDiscountCodeOfCustomerCollectionNewCustomer
.getCustomerCollection()
.remove(customerCollectionNewCustomer);
oldDiscountCodeOfCustomerCollectionNewCustomer =
em.merge(oldDiscountCodeOfCustomerCollectionNewCustomer);
}
}
}
utx.commit();
} catch (Exception ex) {
try {
utx.rollback();
} catch (Exception re) {
throw new RollbackFailureException(
"An error occurred attempting to roll back the transaction.", re);
}
String msg = ex.getLocalizedMessage();
if (msg == null || msg.length() == 0) {
Character id = discountCode.getDiscountCode();
if (findDiscountCode(id) == null) {
throw new NonexistentEntityException(
"The discountCode with id " + id + " no longer exists.");
}
}
throw ex;
} finally {
if (em != null) {
em.close();
}
}
}