I'm stuck.

I have a many-to-many associative relationship with tables like this:

Students <-> StudentsClasses <-> Classes

My StudentsClasses table has columns for a surrogate key and an index column because the classes for a student are maintained in a certain order.

I can't use the <list...> or <bag...> collection because their many-to-many's don't support surrogate keys.

I can't use the <idbag...> collection because it doesn't support the index column for ordering the classes for each student.

What should I do?

Anyone have any ideas? I looked at the source code and was going to add this myself.

My plan was to examine the differences between the PersistentBag and the PersistentIdentifierBag classes, and then apply those changes to the PersistentList class to make my own new PersistentIdentifierList class.

However the PersistentBag and the PersistentIdentifierBag classes are completely different. I don't know where to start.