Making class literal some kind of 'configurable'

Imagine to have this class in some library, which gets added to another project as maven dependency:

class A {

    // What can I do to replace B.class ?
    @SomeAnnotation(B.class)
    private String someValue;

}

I would like to make the class literal B.class some kind of configurable for the mvn project that uses this as dependency. Do I need to do it via reflection capabilities, what are my possibilities here?