hello all,
i have two classes,


public class Keystone {
private Integer id = null;
private String name = null;
// here are get/set methods
}

public class Login extends Keystone {
private String username = null;
private String pass = null;
// get/set methods
}

each class has its own table

table TKeystone (
id integer - primary key,
name nvarchar
)

table TLogin (
id integer - primary key, foreign key
pass nvarchar,
username nvarchar
)

column id in TLogin is primary key and also foreign key that references id column in TKeystone

i don't know how to write mapping files for these classes, i've read docs on hiberante.org, searched in this forum, searched by google but nothing found

can someone help me, please write here the whole configuration files

you need to use a joined-subclass mapping. you can copy the example from the docs...

http://www.hibernate.org/hib_docs/v3/reference/en/html/inheritance.html#inheritance-tablepersubclass

and isn't here any other possibility? i'd like to have one config file for each class, or it's necessary to have mapping for all subclasses in the config file for superclass?

where will i have mapping for Login subclass???? in xml file file keystone or login????

thanks

<joined-subclass extends="...">

i don't know where is error but it doesn't work, could you write here the mapping files for my simple classes i wrote upper???
two files please
Keystone.hbm.xml and Login.hbm.xml

thanks a lot