[hibernate-dev] boolean type support

Another thing we run into in 6.0 dev is handling booleans, specifically in regards to dealing with the database representation (0 or 1, versus 'T' of 'F', versus ...). The way we handle this today (pre-6.0) is to "fake it" by registering a JavaTypeDescriptor for each representation combo[1]. We can obviously continue to do it this way. But in moving forward we wanted to take a step back and look at this again. And really this is the kind of scenario that AttributeConverters are designed to handle. So we are considering to instead actually handle this via an AttributeConverter. To fully understand this remember that we have also moved AttributeConverter tracking on to the attribute[2] itself as opposed to "baking it" into a Type. In that way it would just be handled by the "type system" to automatically add an AttributeConverter to the attribute. Obviously that only works if there is not already an AttributeConverter applied to to the attribute. I cannot imagine that ever happens in a supported way, or a way that we want to support. Essentially that would mean a condition where we convert the value twice in each direction. But in case we miss some ase, I wanted to ask the list. [1] Yes, it seems odd that this is handled in the JavaTypeDescriptor. The reason it happens that way is that it is incorporated into the wrap/unwrap code. [2] I say "attribute" just a a means of simplification. It is really a Navigable which is new concept and probably not well known to everyone..