Is there a way of intercepting all new Hibernate sessions when they're created? I need to access each Session instance to enable a Hibernate filter with a parameter.

The only solution I've gotten working has involved wrapping the SessionFactory, but this involved a lot of semi nasty hacks as well as it required me to implement around 60 methods, where only a few are interesting.

Hibernate's SessionFactory implementation is for some annoying reason declared final so extending it is not an option. I've also tried aspects and Java proxies without any luck.