I am new to hibernate. I want help/reference for the following situation

I have class A and its corresponding hbm.xml file. Individually it is working fine.

I have another class B and its corresponding hbm.xml file. Individually it is also working fine.

Please note that Class A and B are not related to each other in any way

I want to define class C like
public Class C{
private A a;
private B b;

getter and setter methods.

}
Now I want to define hbm.cfg.xml file for this. So that
session.save(objC) will save both A and B (containing classes) in one shot.
What type of mapping will be this?
Plz guide me. How to define mapping file.


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Hibernate version:
Hibernate3.0
Mapping documents:

Code between sessionFactory.openSession() and session.close():

Full stack trace of any exception that occurs:

Name and version of the database you are using:

The generated SQL (show_sql=true):

Debug level Hibernate log excerpt:

As you've mentioned that Class A and B is not related to each other in any way, So i assumed that Class C do not represent one-to-one or one-to-many or many-to-one or many-to-many association between A and B.

If my assumption is correct, then, Class C is only a helper class that dont need tobe mapped into database.

If you wish to save Class A and B at the same time by the help of Class C,
just simply create a method, let say "saveAB" in Class C.

Hi,
Yes you have rightly and exactly understood my requirement.

1) Problem is though class C is not mapped to the database it is not just a helper class. It is logically grouping the attributes in A and B. SOme of hte things will go to table A some of the things to table B. they are not related in the sense that they dont have FK or PK relationship among each other and with A
2) Even then I very much liked your idea. I was just about to implement it and then I realised the A ,B and C are not in data access layer. They don't know underlying dataaccess layer implemenation. So we can't simply call hibernate API. like
public saveAB(){

session.save(A);// They don't have access to hibernate API
session.save(B);
}

Thanks a lot for your reply. Plz provide further assistance