How to mark someone else's object?

Question

Java

I am writing a small library. She doesn't need a spring or a hiber. But I assume that the user of the library, if desired, will be able to save entities in the database, most likely through hiber.

Hence the question, how can you make @Entity from a library object that is not marked up with annotations in advance.

I hope I explained my idea clearly :D

Answer 1

With xml configuration.