Xdoclet and subclasses mapping

ernani · **Posted:** Fri Feb 06, 2004 8:43 am

I understood the way it is tended to do the subclass mapping but it does not attend what I need to have.

I have several tables in my model with the same design.
tableA
tableB

I have one class that describes all the fields of this tables.
MasterClass

I have several other classes that inherits this one class.
MinorClass1
MinorClass2
...

I whould like to put in the class MinorClass1 a mapping to the tableA
and for the MinorClass2 a mapping to the tableB without having to map it individually and make use of inheritance on both classes to the superclass MasterClass that this one has the atributes and getters and setters.

Is there a way to do this?

sgwood · **Posted:** Fri Feb 06, 2004 10:48 pm

Look at the subclass element in the mapping schema. This does what I think you are trying to do.

Sherman

michael · **Posted:** Sat Feb 07, 2004 4:00 am

Your only real option for mapping something like this is table-per-concrete-class IMHO. (you have no table for MasterClass, so no joined-subclass). I don't know if you can get XDoclet to search the superclass for properties though, I think there is some way, just try it.

emmanuel · **Posted:** Sat Feb 07, 2004 11:34 am

I think I've done that before. Xdolcet will look at your parent hierarchy to find mapped properties. So just add your @hibernate.property in your parent class.

ernani · **Posted:** Mon Feb 09, 2004 5:31 am

The only problem I have if I do table-per-concrete class mapping is then I will have to set the @hibernate.id for all of them and map the table on each class and in the superclass I will have also to map it to a table, could be a dummy table but this IMHO is a really nasty model.

Any clues folks?

michael · **Posted:** Mon Feb 09, 2004 6:26 am

No, with table-per-concrete-class you don't map your superclass at all. Take a look at http://www.hibernate.org/hib_docs/reference/html/inheritance.html#inheritance-s1

ernani · **Posted:** Mon Feb 09, 2004 6:53 am

Nice, seems to be that it whould work then but not at all because I will have to map the id of the subclasses into the subclasses and the superclass is the one with the id, I will use all fields of the superclass and no one on the subclasses...

Thanks for all

michael · **Posted:** Mon Feb 09, 2004 6:57 am

It doesn't matter where your properties are defined. Just map them in the subclass, the subclass can be empty as long as the properties are defined in the superclass.