Hello and thanx for any help you can offer.
As part of an evaluation of Hibernate as a possible component of an application that is being refactored, I have downloaded version 2.1.3 and done some very successful initial testing.This has led me to the details (where the devil is).
My question is:
Can I map a class that is NOT directly related to a database table?
The current application does a query that yeilds a result set from a multi table join. That result set is then "processed" to produce instances of a class (let's call it ClassX) that is not directly related to any single table.
ClassX is also NOT related to ant set of tables by virtue of relationships defined in the database DDL.

It is my assumption that I CANNOT map ClassX and that I will only be
able to map the classes that are related to tables that are used in the above mentioned join. The processing that produces the instances of ClassX will have to be done without Hibernate's help.

Is my assumption correct?

You can not map SQL queries to unmapped result classes. You can however use the "select new Something(xxx,yyy,zzz)" in HQL to return unmapped classes from HQL queries.

"select new Something(xxx,yyy,zzz)"

could you explain this kind of hql in detail?
I also encountered the multi-table mapping problem.