public void destroy(long id) throws NonexistentEntityException {
   EntityManager em = null;
   try {
     em = getEntityManager();
     em.getTransaction().begin();
     CheckoutRecord checkoutRecord;
     try {
       checkoutRecord = em.getReference(CheckoutRecord.class, id);
       checkoutRecord.getId();
     } catch (EntityNotFoundException enfe) {
       throw new NonexistentEntityException(
           "The checkoutRecord with id " + id + " no longer exists.", enfe);
     }
     Member member = checkoutRecord.getMember();
     if (member != null) {
       member.getRecords().remove(checkoutRecord);
       member = em.merge(member);
     }
     Fine fine = checkoutRecord.getFine();
     if (fine != null) {
       fine.setRecord(null);
       fine = em.merge(fine);
     }
     em.remove(checkoutRecord);
     em.getTransaction().commit();
   } finally {
     if (em != null) {
       em.close();
     }
   }
 }
 public void edit(CheckoutRecord checkoutRecord) throws NonexistentEntityException, Exception {
   EntityManager em = null;
   try {
     em = getEntityManager();
     em.getTransaction().begin();
     CheckoutRecord persistentCheckoutRecord =
         em.find(CheckoutRecord.class, checkoutRecord.getId());
     Member memberOld = persistentCheckoutRecord.getMember();
     Member memberNew = checkoutRecord.getMember();
     Fine fineOld = persistentCheckoutRecord.getFine();
     Fine fineNew = checkoutRecord.getFine();
     if (memberNew != null) {
       memberNew = em.getReference(memberNew.getClass(), memberNew.getUniqueMemberNumber());
       checkoutRecord.setMember(memberNew);
     }
     if (fineNew != null) {
       fineNew = em.getReference(fineNew.getClass(), fineNew.getId());
       checkoutRecord.setFine(fineNew);
     }
     checkoutRecord = em.merge(checkoutRecord);
     if (memberOld != null && !memberOld.equals(memberNew)) {
       memberOld.getRecords().remove(checkoutRecord);
       memberOld = em.merge(memberOld);
     }
     if (memberNew != null && !memberNew.equals(memberOld)) {
       memberNew.getRecords().add(checkoutRecord);
       memberNew = em.merge(memberNew);
     }
     if (fineOld != null && !fineOld.equals(fineNew)) {
       fineOld.setRecord(null);
       fineOld = em.merge(fineOld);
     }
     if (fineNew != null && !fineNew.equals(fineOld)) {
       CheckoutRecord oldRecordOfFine = fineNew.getRecord();
       if (oldRecordOfFine != null) {
         oldRecordOfFine.setFine(null);
         oldRecordOfFine = em.merge(oldRecordOfFine);
       }
       fineNew.setRecord(checkoutRecord);
       fineNew = em.merge(fineNew);
     }
     em.getTransaction().commit();
   } catch (Exception ex) {
     String msg = ex.getLocalizedMessage();
     if (msg == null || msg.length() == 0) {
       long id = checkoutRecord.getId();
       if (findCheckoutRecord(id) == null) {
         throw new NonexistentEntityException(
             "The checkoutRecord with id " + id + " no longer exists.");
       }
     }
     throw ex;
   } finally {
     if (em != null) {
       em.close();
     }
   }
 }
 public void create(CheckoutRecord checkoutRecord) {
   EntityManager em = null;
   try {
     em = getEntityManager();
     em.getTransaction().begin();
     Member member = checkoutRecord.getMember();
     if (member != null) {
       member = em.getReference(member.getClass(), member.getUniqueMemberNumber());
       checkoutRecord.setMember(member);
     }
     Fine fine = checkoutRecord.getFine();
     if (fine != null) {
       fine = em.getReference(fine.getClass(), fine.getId());
       checkoutRecord.setFine(fine);
     }
     em.persist(checkoutRecord);
     if (member != null) {
       member.getRecords().add(checkoutRecord);
       member = em.merge(member);
     }
     if (fine != null) {
       CheckoutRecord oldRecordOfFine = fine.getRecord();
       if (oldRecordOfFine != null) {
         oldRecordOfFine.setFine(null);
         oldRecordOfFine = em.merge(oldRecordOfFine);
       }
       fine.setRecord(checkoutRecord);
       fine = em.merge(fine);
     }
     em.getTransaction().commit();
   } finally {
     if (em != null) {
       em.close();
     }
   }
 }