I've searched the forum for topics concerning cloning a persisted object containing a collection with the intent of persisting the new object. I've seen replies from the Hibernate team about using the Metadata API for this, but I've yet to see a good example. With the number of folks trying to do this, it would seem that someone has come up with a good (generic) solution.

The example in 9.10 of the Hibernate reference document seems to offer a hint. It collects the properties that are not entities or collections, but does nothing with them. (As a side note, the documentation is in error--there is no isCollectionType() method on the Type class--I believe it's supposed to be isPersistentCollectionType()). I assume I could use

catMeta.setPropertyValue(newFritz, propertyNames[i], propertyValues[i]);

to copy these properties, but that doesn't really accomplish the task. The problem is that a persisted Collection in the object needs to cloned in such a manner that when the containing object is saved, a copy of the collection is added as well. If I simply deepClone my object, I get

net.sf.hibernate.NonUniqueObjectException: a different object with the same identifier value was already associated with the session

on the Collection when the cloned object is saved. If I try to reuse the collection in the newly cloned object, a different exception is thrown.

So, what does the code (metadata API?) look like to solve this problem in a generic way?

Thanks.

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Phil

Did you get any resolution to this

I ended up digging through the MetaData API and coding my own solution. I would post it, but I am not confident that it's a generic solution (although it does seem to satisfy my needs for the moment).

--
Phil

Can you send an example implementation to me?

I don't see your e-mail address in your profile.

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Phil

my email address is garpinc (.at.) yahoo.com

Hi,

I have a similar problem. Would you mind sharing your solution with me? You can email me at sgalgali@medplus.com.

Thanks,
-SG

Did any one manage to get an example implementation of this? I'm trying to implement the same and it would be very helpful if somebody could send this at visves77 at yahoo dot com.

Thanks