I am not certain how to explain this situation, but we have a portal system that provides a secure tunnel from our web server through our firewall to our database server. This server provides methods to access a connection and make queries against the database. What would I need to look into extending in order to use make hibernate call custom methods for db access. I believe this is going to be way over my head at this point so I need to know what classes actually make the SQL calls so that I can do a lot of reading before I start.

Thanks,
Chad