Re: learning Hibernate

>I'd encourage people to compare JDO and JPA. My understanding is 
>that JDO has much richer modeling capabilities. JDO is a 2.0 
>product, JPA is not even released as 1.0 yet (as far as I know). If 
>you don't like the queries of Hibernate (very SQL based), you will 
>not like the queries of JPA.


Just as footnote, the  JPA spec. is final  and the reference 
implementation is included in the Sun J2EE 5 Sun Java System 
Application Server Platform Edition 9.

People who use JPA will eventually be able to run their code 
unchanged under BEA, JBoss, IBM WebSphere, Sun, Toplink, Hibernate, 
and any J2SE 6, which is a huge attraction.

JDO has good things too, but is not included in J2EE or J2SE.

As has been pointed out, it is somewhat apples and oranges in any 
case because they are very different.

Coming down the road, we also have SDO, which is tied to SCA.     It 
is more language independent but I think a bit more like JDO than 
SDO, though again a different target.   SCA is IBM and BEA and 
others, and Sun just joined too.....