I don't think you can do that. Maybe some one else have done it,
I don't know.
What I have done once is two different DBs with the same tables.
Created a super bean and inherited two beans connecting to
the different schemas. The client could choose what bean to use.
I think that is that I'm looking for.
I've 2 DB with the same tables and I need to choose one of them in every moment depends of the client choose