[eclipselink-users] copy object and then inserted.

[Weiquan Yuan <weiquan.yuan@xxxxxxxxx>]

Hi, 

I am having problems on colone object using eclipseLink 
objectcopyingPolicy. 

I have an entity A with children entity B, and B have multiple 
children entity C , D. Here is the roughly for the structure. 

A has oneToMany relationship to B, and A has pk aId annotated as
 generatedValue AUTO. B is annotated as privateOwned, 
@OneToMany(mappedBy="a", cascade = ALL, targetEntity=B.class)

B has oneToMany relationship to C, and B has @EmbeddedId pk 
class which including aId and bId, and C has @EmbeddedId pk class which 
include aId, bId, cId

B has oneToMany relationship to D, D has @EmbeddedId pk class 
which including aId and bId and dId. 

when using the snippet below to colon object and then persist 
it, 

===================
                private EntityManagerFactory emf = 
Persistence.createEntityManagerFactory("brancoch");
                private EntityManager em = 
emf.createEntityManager();
                
                // first step, tried to retrieve one existing one 
from Db
                A a = findAById(new String("10005699"));
                String xml = getXml(a);
                System.out.println(xml);
                
                // next step, colon A and then insert colonedA
                a = fromXml(xml);
                A colonedA = clone(a, em);
                em.getTransaction().begin();
                em.persist(colonedA);
                em.getTransaction().commit();
                
                
                -------------------------------------
                private A clone(A s, EntityManager em) {
                EntityManagerImpl eme = (EntityManagerImpl) 
em.getDelegate();
                Session session = eme.getSession();
                ObjectCopyingPolicy p = new ObjectCopyingPolicy();
                p.cascadePrivateParts();
                //p.setDepth(p.CASCADE_ALL_PARTS);
                //p.cascadeAllParts();
                
                s = (A) session.copyObject(s, p);
                return s;
        }
        
========================================================		
In the console, i can see that it clearly insert A , and B with 
differnt newly generated value aId, but when inserting C, it throws 
error for duplciate recorde insertion, because it still using the old 
aId instead of the new one. 

is that because I use @EmbeddedId pk class in C? If that is 
right, why it works for class B?

Or it is because the ObjectCopyingPocily.Depth = 3? I tried to setDepth(CASCADE_ALL_PARTS), it is still as 3. Any suggestion? 

thanks a lot.