Null-Handling Options

[geoffreywiseman]

We have had situations where Hibernate uses null when all fields in a component are null, which isn't consistent with our desired approach. We can't fix it in Hibernate, so it would be nice if we could have Moo sort it out at translation time, by telling it that if a particular property is null, just instantiate an instance of the target class.

Not sure the right way to include that in the configuration/annotation, but something to think about.