[Hibernate] Querying interfaces + unmapped superclasses

[Gavin K. <ga...@ap...>]

Hi everyone. Theres a new feature in CVS that lets you write queries like
this:

"from o in class java.lang.Object"

"from n in class eg.Named, m in class eg.Named where n.name = m.name"

(eg.Named is an interface implemented by potentially many persistent
classes.)

By side-effect, we now pretty much support the "table-per-concrete-class"
mapping strategy (as much as I would like to, anyway).

So once we finish the "table-per-subclass" strategy (ie.
MultiTableEntityPersister) we will then support all three mapping strategies
defined in the well-known Ambler paper.

Funnily enough, this didn't really take me a lot of work, so I've no idea
why I didn't do it before....