Generate JPA 2 Entities from existing Database

Question

How can I generate JPA2 compliant @Entity from existing Databases?.

I found this: Question

Still its not clear if JBoss will generate compliant JPA2 and also

Answer 1

You should have a look at minuteproject on this track reverse-engineering for JPA2. It is a vendor independent tool. In release 0.5.5 it generates:

• JPA2 entities (for table and views) and associated metamodel
• persistence.xml (only hibernate configuration is available in 0.5.5) but you can overwrite it.
• maven pom with querydsl integration
• Enum classes (if specified at enrichment i.e. in config file).

I have not tried it with H2 but to do this you need to

• add the H2 jdbc driver in $MP_HOME/application/lib/extra
• add the driver class and your connection parameters in MinuteProject configuration.