Ok ,i have a bidirectional relation and i must use a list collection because we 've already implemented the methods to work with them ,the structure of the table is this
Product;
p_idprod
p_descr

Suplement:
p_idsupl
F_idProd

Does exist a way to map these tables using a list collection,or i must use another collection.
I must mention that both classes inherited from another.
<class
<joined-subclass product

</joined-subclass>
<joined-subclass suplement

</joined-subclass>

</class>

Must I cast the list returned from the method find to a set or another collection type?.

Thanks.

Use a bag