Description Vikram Bhatia 2011-09-12 06:52:58 EDT

UnitOfWorkIdentityMapAccessor.getFromIdentityMap() ignores inheritance. If identityMaps are not initialized in UOW, and it checks parent session identityMaps for the cacheKey, it doesn't take inheritance into consideration, and returns the object of the wrong class.

A - Base Class.
B extends A.
C extends A.

        EntityManager em = createEntityManager();
        em.getTransaction().begin();
        
        Session session = ((EntityManagerImpl) em).getActiveSession();
        
        UnitOfWork uow = session.acquireUnitOfWork();

        ReadObjectQuery vQuery = new ReadObjectQuery(C.class);
        vQuery.setShouldRefreshIdentityMapResult(true);
        
        // read some SmallProject and ensure it's present in shared cache
        C vSmallProject = (C)uow.getParent().executeQuery(vQuery);

        long vId = vSmallProject.getId();

        Object vResult = null;
        // ask uow.IdentityMap for a LargeProject with PrimaryKey vId. There is no LargeProject with this key.
        vResult = uow.getIdentityMapAccessor().getFromIdentityMap(vId, B.class, false);
        if (vResult instanceof C) {
            System.out.println("\n\nFound Wrong Class Object : " + vResult + "\n\n");
        }