Hi,

is it possible to map extended classes completly to seperate tables?

I have

class A
class B extends A
class C extends A

I want to map B to table "b" with all all attributes of A+B, similar for C

I do not need a table for A (A is abstract, so does not help)
I do not want B to be joined over table "a" and "b"
I would like to define all properties of A in its mapping file and extend on these in the mapping file of B.

Well, it is kind of an inheritance of mapping files...

Ist this possible?

Not directly but you can use the standard XML include feature. Hibernate will not care as it is an XML feature.

OK, I can use that to improve th mapping file situation.

But now I have seperate classes, which is a problem, as

A is my persistent base class
B is contained in a collection/set (inverse=true)
the collection/set is once contained in B itself and once in C

now the contained element needs a property and a many-to-one mapping for each possible parent. not nice. I want only one parent of type A, as all are extended from this. But A being abstract is not mapped, only its attributes contained in the mapping of B and C.

What is the solution?

subclass is not, as unpractical in a larger project for ALL classes and I need seperate tables

joined-subclass is not, it does split my tables and is still all in one mapping file.

???