portable lightweight java orm framework for android

Question

Hi all, I am developing portable library on java which will run on mobile device (android, blackberry) . I am looking for lightweight orm framework that i can use here here is list with orm frameworks i found in google http://java-source.net/open-source/persistence . I've used only hibernate and i' not familiar with most of them so any advice for orm framework that i can use ? Here are my requirementс:

1. The framework must be on java2me
2. Must run on android, android wraps database connection so connection is not directly accessible and some frameworks use the connection.
3. Must be portable

Any help will be helpful.