I haven't used it, but we started a Cayenne implementation of the JPA
part of EJB 3 (JPA - Java Persistence API - an ORM part of the wider
EJB3 spec).
JPA standardizes mapping format and access classes but leaves lots of
details up to the implementors. "JPA-the-spec" is much less
sophisticated than EOF API (or Cayenne API for that matter). It omits
such things like object queries (JPA provider-independent way to do
queries is EJB QL, yikes!), nested contexts, generic records, etc. In
short - it smells of Hibernate :-) However it has ways for the
implementors to add all these things as non-standard extensions.
My take on it is that many existing ORM API's (EOF excluded) will
likely be aligning themselves with JPA as the least common
denominator, but JPA itself in its current form is a bit too limited.
Andrus
On May 17, 2006, at 7:29 PM, Jake MacMullin wrote:
I don't know much about it - other than what I just read in an
article on O'reilly's onjava.com (http://www.onjava.com/pub/a/
onjava/2006/05/17/standardizing-with-ejb3-java-persistence-api.html?
page=5), but has anyone used the new EJB3 Java Persistence API?
If so - how does it compare to EOF?
Cheers,
Jake
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