Hi Board

I want a one-to-one between classA and ClassB.

When i instantiate classA i want to automaticly, generate a classB entry in the database. I cannot instantiate classB in the contructor of classA, since when im loading the objects back, the default constructor will be called, and i'll make duplicates in the database.




I have looked in the documentation, for one-to-one relations, trying to resolve this.

But i have not come to an answer, how to automaticly make an instance of classB when i create classA.

Can it be done in the mappings file only?

Any suggestions would be welcome.


Hibernate version:1.21

/CSky

Hi CSky,



I understand why you don't want to instantiate classB in the default constructor of classA. Could you you a different overloaded constructor though? Or a factory method perhaps?

Regards,
Richard

I could do it programaticly in the code.

But i would prefer it done through the mappings file only. Since classA is instatiated all over 1.000.000 lines of code.
Like a trigger perhaps, just making a entry in the db, when classA is instatiated.

I don't believe there is a way of incorporating application/business logic like that in the mapping files.

I would recommend taking the pain of the refactoring, and protecting the default constructor.

Ok thx for the answers.

I think ill do the factory pattern as you suggested.