That said... what I was getting at in the email thread is that eventually I would love that a "basic type" mapping is really just a combination of:

• JavaTypeDescriptor
• SqlTypeDescriptor
• MutabilityPlan (often inferrable from JavaTypeDescriptor)
• (optionally) AttributeConverter

Really the case we are talking about here is the case where we have just a JavaTypeDescriptor and want to infer the SqlTypeDescriptor.