<composite-id>
<key-property name="xy" type="integer" column="col1" />
<key-property name="xyz" type="integer" column="col2" />
</composite-id>

In the above case the value of col1 is required to come from a sequence.
How do i implement it in case of a composite-id?
Any thoughts or suggestions are most welcome.

Hibernate version:
3.0.1
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:

If col1 comes from a sequence, where is the need for a composite-id since the sequence column itself will be unique ?