How can I transform Entity-Based diagram to a JPA java code

I have class diagram created with "Sparx Enterprise Architect v8.0" and i need to generate JPA-based classes with annotations that reflect relations to use it in the code. The problem is that i can convert it to EJB but not JPA which is required for my task.

I don't know this product, however they claim that it:

supports modeling of database schema and automatic generation of DDL scripts for eleven DBMS targets out-of-the-box

Once you have the database schema I believe there are various tools that can reverse engineer it and generate JPA entities. Few random hits in Google:

• Generating Persistence Mappings from Database Schema
• Creating JPA entity beans from database tables
• Object-Relational Mappings: Generating JPA Entities