Gavin,

What is the plan for Hibernate for JDK 1.5 migration?

Thanks
Vamsi

It should be backward compatible?

Thanks for the quick reply friend.

Our product is planned for production release in Sept 2005.

We are currently using Swing(JDK 1.4.3), JBoss 3.2 App server and Hibernate 2.1.2.

Our user base is expecting skinnable L&F and I like to use JDK 1.5 new L&Fs. And we developers are as usual eager to use generics and other new lang features.

What would you advice - since we are using aggressive products like JBoss/ Hibernate, should be go for JDK 1.5 development or wait?

Thanks
Vamsi

I really don't know, I didn't have any time to look closer at JDK 1.5 yet so I can't give you any general opinion.

Hibernate 2.1.x should run on JDK 1.5 (they claim its 100% backwards compatible). If it doesn't, it should be easy to make it work.

I'm sure that we will have at least a "compiled and unit tested on JDK 1.5" Hibernate 2.1.x soon, of course without using any of the 1.5 only features.

Development on these new features will happen in the 2.2.x branch. Thats pretty much all we have planned right now. JDK 1.5 is still in beta and the final release and adoption for new projects will keep people busy another 6 to 12 month.

Maybe Gavin likes to add something I forgot, can't remember all of our last discussion about that :)

So far the 2.1.2 release compiles and unit tests nicely on a 1.5 VM without source="1.5" set. With source="1.5" it compiles and tests after changing some occurences of the new enum keyword.

As for support of new features like generics: I think it should allready be possible to persist classes using typesafe collections. As far as I know, both assignment of for example a Set<String> to a normal Set is allowed and also the other way round. Probably this will allow you to just map your typesafe containers as plain old sets. I will conduct some experiments in the next days and weeks ...