How to handle mapping of generated classes with identical fields?

We have a large number of classes that is generated by JAXB. There are a couple that have identical fields and I want to see if there is a clean way to map class A to class B.

Example:

public static class ParentA  implements ... {     public static class A implements ... {       protected String name;    } } 
public static class ParentB  implements ... {     public static class B implements ... {       protected String name;    } } 

I want to take an incoming A and map it to B but there are many other classes that I want to map A to. How can I handle this? I see that there is a copyTo method, but it only copies A to another A.