Hi.

When i use "Table per class hierarchy" mapping strategy, can i map fields of different subclasses to the same table field?

For example.

Class Value { String value;}
Class name_one extends Value {int id_one;}
Class name_two extends Value {int id_two;}

table
-------
table_id
value
discriminator
id

So can i map both id_one and id_two to the id?

I don't see why not.
Go and try it.