[jboss-user] [JBoss Seam] - Re: Problem with s:convertEntity

petemuir do-not-reply at jboss.com
Sun May 6 03:53:31 EDT 2007

I'm sure Christian can explain this better than me but my (poor) understanding is that:

* If you get a persistent object twice from the same EntityManager, then it takes care of returning the same object. Thus, the default equals and hashcode work.  

* Equals and hashcode are *hard* to get right when using persistence (you need to use a natural id - not the pk) if you want Collections to work with detached objects.

Therefore, as Seam's LRCs mean you (rarely) need to work with detached objects, you neatly avoid the equals/hashcode problem.

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