Hi Sahoo,
Aggregate descriptors are cloned at session initialization time.
AggregateObjectMapping.initialize(AbstractSession session) does the
cloning. As each AggregateObjectMapping initializes itself, it takes a
copy of the Aggregate descriptor that was created prior to
initialization and makes changes to it so that it is appropriate to the
object it is actually mapped on. Currently, some of the changes include
setting the tables and primary key fields to be the correct ones for the
table the object that encloses it uses.
-Tom
Sanjeeb Kumar Sahoo wrote:
>Tom,
>
>As far as I know TopLink Essential maintains one *ClassDescriptor* per
>*JavaClass* in the Project object (there is Map<Class, ClassDescriptor>
>in Project). This is why I suggest we throw an exception if an
>embeddable that has no metadata in it is used in entities with
>conflicting access-types.
>I don't understand why Marina mantioned that TopLink creates a copy of
>the model for each use of the embeddable class and you also agreed with
>her. Can you please clarify this?
>
>Thanks,
>Sahoo
>
>Tom Ware wrote:
>
>
>>That corresponds with my understanding.
>>
>>-Tom
>>
>>Marina Vatkina wrote:
>>
>>
>>
>>>Sahoo, Team,
>>>
>>>We discussed with Tom the short term requirements to fix this issue, and
>>>agreed that for now we should not change the behavior supported by the
>>>current code. Tom, please correct me if I miss anything.
>>>
>>>TopLink is able to support sharing an Embeddable between 2 entities with
>>>different access type, because it creates a copy of the model for each
>>>owner. Which means that the best current approach to fix this bug (we
>>>can
>>>continue philosophical discussions about the features) should be:
>>>
>>>
>
>
>
--
Tom Ware
Principal Software Engineer
Oracle Canada Inc.
Direct: (613) 783-4598
Email: tom.ware_at_oracle.com