JPA code in Google App Engine

[Ravi kapa]

Hi, i was finished with openJPA JPA web app and thank you guys..Now i was tasked on developing JPA app with ObjectDB and also finished it but what my problem is i want use this ObjectDB JPA code in Google App Engine(cloud provider)Bigtable which uses JPA spec to interact with it(i mean what driver i need to give in EntityManagerFactory instead of OBjectDB).Can anyone know about it??