Changing class the determines Data type

Is there a way to specify a custom class that determines the data type
of a db table column?  I am using middlegen with the Hibernate plugin
and the default choices do not map well for Hibernate usage.  For
example, it may choose a nullible integer column to be a java int, while
it should really be an Integer since it is nullible.

Therefore it would be nice if I can implement some interface that
passes in the SQL type and I would return the datatype I would like to
use.  Is there functionality for this already?

Thanks,
Daniel


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