I would like to make something like calculated field - in hibernate2 it was done by formula mapping. I am trying to find annotation for this in hibernate3, but it seems there is nothing like that. Any ideas ?

it's in our todo list but not with a high priority, check jira.

Vote for it. We're open minded (up to a limit ;-) )

I have assigned my vote to this in JIRA. Actually I need this because I would like to migrate my current project from Hibernate2 to Hibernate3. If I just upgrade the jar file and overwrite the imports from net.sf.hiberante to org.hibernate and also the DOCTYPEs in the mapping *.hbm.xml files I encounter the problem, that ID properties are not generated in *.java files if I use the code generator from hibernate tools. So I have decided to use the annotations and after few minutes of excitement by this new feature I had to deal with this formula problem. Also the orderby clause seems to be unsupported right now.

I think those 2 features are quite easy to implement, please contribute if you can :-)

I am not very experienced with Java - I am actually happy if I can make my first Tomcat-Hibernate-Spring-JSP merry-go-round (project) keep spining. But just in case if I would like to code this features on my own and put the result back into hibernate core where should I get the info like how should the annotation class look like, in which package it should be located, etc...?

get HibernateExt from CVS
check the metadata subproject
annotations are in org.hibernate.annotations
and the binding tools are in org.hibernate.cfg and org.hibernate.cfg.annotations

The annotation will look like @Formula(sql="case ...")

I have got the source ... I will look at it...