Matt,
I believe since the Person and Student object exist it will set there
values to null except the personId. Because in the User instance you are
storing allthe other fields are null (if you set them to null when you
declare them) except the loginName. So, ojb will know that person and
student 001 exist and will do and update instead of an insert.
You should create them on the first store. Or do not have user extend
Student, instead have a 1:1 relationship. Depends on your requirments i
guess.
-chris worley
> I'm trying to figure out how to store a new persisted object that
> extends a pre-existing object.
>
> For example, I have 3 classes: Person, Student, and User. Student and
> User extend Person. A Student object already exists, and I now want to
> create a User object that inherits from the same Person as the Student
> object. Is this possible? Here's a code example:
>
> User user = new User();
> user.setLoginName("matt");
> user.setPersonOid("001"); // A pre-existing person
>
> broker.beginTransaction();
> broker.store(user);
> broker.commitTransaction();
>
> The result of the above code is a NEW empty person object being created
> with a newly generated OID (via a sequence). How can I associate the
> new User with a pre-existing Person?
>
> Thanks again.
>
> Matt
>
>
>
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