I had my problems too, especially finding a "business key" for every entity, as the hibernate team proposes. Finally, I picked up the idea of implementing equals and hashcode using the obect's id, and a random identifier on newly created objects.
For this purpose I have a base class for all objects, that are identified by Long ids. See the attached file, if you're interested in a AppFuse-ready class. The idea is from the following site: http://www.avaje.org/equals.html#gerry There you'll find a much more concise overview over all the possibilities, compared to reading the whole discussion on the hibernate site. Kind regards, Tobias ________________________________ Von: Michael Horwitz [mailto:[EMAIL PROTECTED] Gesendet: Montag, 30. Juli 2007 09:45 An: users@appfuse.dev.java.net Betreff: Re: [appfuse-user] LazyInitializationException: illegal access to loading collection.... I have had a lot of problems in impelementing equals/hashcode, particularly on entities that I wanted to include in a set. I found at one stage that hibernate was instantiating the entity, adding it to the set, and only then setting its properties. The net result is that the hashcode changed between the time the entity was added and it was accessed. I'm afraid I just gave up and returned 0 as the hashcode for all persistent entities.... Mike On 7/27/07, Daniel.Rodriguez <[EMAIL PROTECTED]> wrote: Matt & Michael, It seems I finally found a solution Checking again thru the logs I noticed that the exception was raised everytime that my entity hashcode's method was called. So I rechecked the Hibernate folks discussion on Equals and Hashcodes at http://www.hibernate.org/109.html . What I basically did was that I modified commonclipse hashcode to remove the references to the conflicting collection. Voila, that did the job (and according to my junit tests, it works flawlessly so far). I also read about using UUID in the Equals/Hashcode on the same site. It's not ideal (it's a JUST WORKS tm solution) so I wanted to hear what are your opinions on the matter. Thanks. -- View this message in context: http://www.nabble.com/LazyInitializationException%3A-illegal-access-to-l oading-collection....-tf4152650s2369.html#a11833906 <http://www.nabble.com/LazyInitializationException%3A-illegal-access-to- loading-collection....-tf4152650s2369.html#a11833906> Sent from the AppFuse - User mailing list archive at Nabble.com. --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
BaseObjectIdentified.java
Description: BaseObjectIdentified.java
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