I've heard from a couple of sources that Hibernate supports or will support JDO, but I can't find anything about this (either confirming or refuting it) anywhere on hibernate.org. Is this something that Hibernate has or is actively working towards?

I'm asking because I currently use a JDO2 implementation I'm looking to swap out. Obviously it'd be a lot easier to replace it with another JDO implementation than an entirely different ORM technology...

Alternatively, does anyone have any experience migrating from JDO to Hibernate (particularly from JDO2, since I'm using features not available in JDO1)?

Thanks,

L.

It is very very unlikely that you will see the hibernate team producing JDO2 implementation. If your looking for a standard then use EJB3 persistence of which Hibernate not only has an implementation, several members are on the standards commitee. The biggest issues will be differences in the query language(s). My view is that it would be worth the effort.

That's a shame. I take it EJB3 persistence isn't going to look anything like JDO then? I haven't looked at EJB3 at all. Can the persistence capabilities in EJB3 be applied to regular POJOs without having to go full-bore EJB?

L.

EJB3 Persistence (JSR220) can run outside of the container and is POJO based. All the major JDO vendors are writing JSR220 APIs into their products. Read the Hibernate Forum and the documentation should give a good overview.

http://www.hibernate.org/299.html