Hello Christian,
"m_p" would reference a new managed instance of the Address() that
would be fully copied from the original Address. The Address is fully
copied because it is a practical way to get a managed version of the
Address.
--Gordon
On 10/12/2012 8:56 AM, Christian von Kutzleben wrote:
> Dear group,
>
> What is supposed to happen in this scenario:
>
> @Entity
> class Person {
> //...
> Address address; //cascade-merge or cascade-all are not specified
> }
>
> @Entity
> class Address {
> //...
> }
>
> em.getTransaction().begin();
> Person p = new Person();
> em.persist(p);
> em.getTransaction().commit();
>
> em.getTransaction().begin();
> em.detach(p);
> p.setAddress(new Address());
> Person m_p = em.merge(p);
>
> //what does m_p's "address" field contain? Or should merge throw an
> exception right away?
>
>
> Thank you!
>
> Christian
>
> --
> Christian von Kutzleben
> Chief Engineer | Versant GmbH
> (T) +49 40 60990-0
> (F) +49 40 60990-113
> (E) cvkutzleben_at_versant.com <mailto:cromberg_at_versant.com>
> www.versant.com <http://www.versant.com> | www.db4o.com
> <http://www.db4o.com>
>
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