[teknomage1]

If you translated the derived classes can't you just take the three methods from one of the derived classes and declare them virtual?
I don't think you need to do anything like the ocntortions perl puts itself throught o generate and bless a hash to be the object, just code the object/class the way you would a normal C++ class. For the abstract class it seems you could just work from the comments since the majority of the "code" present is just error reporting and book keeping code.