Using some ideas from the flexible solution I was getting an exception 
on the nullSaveGet method:

object is not an instance of declaring class.

So I changed:

valueOfMethod.invoke(enumClass, new Object [] {ordinal});

to

valueOfMethod.invoke(enumClass.getEnumConstants()[0], new Object [] 
{ordinal});

Did anyone else run into this?  Is there a better way of doing this?