Hibernate Version : 3
Database: Sybase 12.5.1
WebLogic 8.1

Hi,

I have seen plenty of examples using the joined-class to define the B is a Subclass of A relationship.
What I would like to define in my mapping file is the C is a B is an A(or C extends B extends A). Am I right to assume I can use a joined-subclass within an another joined-subclass ?

Secondly, if each of my classes have a large number of properties, the mapping file could get quite large and more difficult to manage.
Is there a way to define the relationship but seperate the mapping files in to smaller ones.


Thanks in advance

Jadiyo

Yes, you can either nest the joined-subclasses or you can declare them separately and then use the extends attribute to link them together. If you do this they can even be in separate files all loaded into the same SessionFactory configuration.

See http://www.hibernate.org/hib_docs/v3/re ... ogrammatic for details on loading multiple files

Thanks r1ch...very helpful.

So, if the definition of A is in its own mapping file and the joined-subclass B is defined in another (with extends A), this means mapping file for A no longer has any reference to B and Hibernate is clever enough to do the donkey work when it loads?

Thanks again

Jadiyo.


[/i]

Yes - we're doing exactly that with our application. We have mapping files for various modules that get loaded via addResource in an unpredictable order at startup but as long as all of the dependencies are there by the time buildSessionFactory is called Hibernate manages to work it all out.