Is it possible to persist data in GAE/java without using annotations?

Question

I'm looking to add google-app-engine datastore persistence to one of my projects. So far, I've been reluctant to use the annotations, since I would want to have multiple DAO implementations ( e.g. Hibernate vs. GAE datastore ).

Is there a way to have the persistence configuration done without annotations? I found no hints in the official guide.

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Please note that I don't want to use the JPA annotations, no matter how standard, since:

• the JPA implementation is incomplete;
• it still ties my model to a persistence implementation.

Answer 1

One possible way is to have special objects for persistence, mirroring the model. But that is way to complicated to consider seriously.