i want know how to implement inheritance in the file *.hbm.xml

thanks for all your suggestions

first suggestion: read the doc ;)

http://www.hibernate.org/hib_docs/refer ... tance.html

if i use table-per-subclass mapping
what i must put in file hbm per sub-classes

thants for other suggestions

A table-per-subclass mapping would look like:

<class name="Payment" table="PAYMENT">
<id name="id" type="long" column="PAYMENT_ID">
<generator class="native"/>
</id>
<property name="amount" column="AMOUNT"/>
...
<joined-subclass name="CreditCardPayment" table="CREDIT_PAYMENT">
<key column="PAYMENT_ID"/>
...
</joined-subclass>
<joined-subclass name="CashPayment" table="CASH_PAYMENT">
<key column="PAYMENT_ID"/>
...
</joined-subclass>
<joined-subclass name="ChequePayment" table="CHEQUE_PAYMENT">
<key column="PAYMENT_ID"/>
...
</joined-subclass>
</class>



Actually i think you have a problem, so explain it or if you don't have a precise problem read the doc

i want to know what i must put in fine CreditCardPayment.hbm.xml?

oh, if you follow this example, you just need one xml file for the main class and all its subclasses

then if i want to persist the sub-class without insantancing the main class
i must have hmb.xml file NO??

no, it will work without problem

Please, read the documentation and also try to understand it! This is really trivial. No, instances have nothing to do with classes/mappings of classes.

i want to say: if i make

...

sub-class.save();

it works or no?

it will not since you must call session.save(subclass....

Sunes, you'll have all the help you need here but if you don't take the time to read the doc and to test by yourself, people will soon stop helping you... just an advice