I could not find any clue of table-per-concrete-class persistancy anywhere in the documents, but it mentioned in the feature list. I wonder is it supported in the hibernate and how can I use it (preferrebaly using xdoclet)

There is no special mapping required. Just map each subclass using <class>. Hibernate handles polymorphis queries using "implicit" polymorphism, and you can map a polymorphic association using <any>.

i couldn't get you :(
Let me describe my problem. I have a resource class which has only one field: resourceId. i want my partner class and machine - that both are very heavy classes- inharite from resource. I really don't want to create a table for resource class, bu ti want to add a field for resourceId in each subclass of resource class. What shall I do?

emmmmmm, and after that will hibernate handle the selection on resource class? Can I use a forexample get Resources() and cast it to cmy concrete classes?

Sure. Just map the association using <any>

hello hibernate guys,

"SecParaDetailed" is a superclass of many classes I used as a table in my hibernate mapping. I used table-per-concrete-class inheritance mapping strategy because I do not want to create a table for "SecParaDetailed". How do I query all its subclasses together with the "class property". Do I need to use the <any> tag you are mentioning? Or should I use "discriminator-value" instead to be able to query its "class property"? I need to query the "class property" because I want to distinguish one subclass from the other.

Thanks in advance! :)

I would strongly recommend upgrading to HB3 and using <union-subclass> if you want full queryability of associations.

follow - up question:

Is there any way I can implement this type of query using this HB2? How about compatibiliy issues in my hbm.xml files created for HB2. And I think this is more of an issue of inheritance rather than association.

Thanks! You're the King! :)