Nested Inheritance

Vladislav Pernin · **Joined:** Thu Feb 05, 2004 6:51 am **Posts:** 50

Hi,

Just want to know if it is possible to nest in a joined-subclass another joined-subclass element because I have class which extend extended class?

Vlad

michael · **Posted:** Fri Mar 05, 2004 6:10 am

Yes it is.

emmanuel · **Posted:** Fri Mar 05, 2004 10:44 pm

The DTD is your friend. It is well self-documented

Thomas · **Joined:** Tue Jun 22, 2004 4:36 am **Posts:** 3

Class A
^
| extends
|
Class B
^
| extends
|
Class C

Just for ducumentation:

Error message:
net.sf.hibernate.MappingException: Cannot extend unmapped class org.elena.evaluation.hibernate.ResponseElement
at net.sf.hibernate.tool.hbm2java.CodeGenerator.handleClass(CodeGenerator.java:147)
at net.sf.hibernate.tool.hbm2java.CodeGenerator.main(CodeGenerator.java:118)

If you receive this error message you may have problems with multiple inheritance.

Solution:
F. e. use Nested join-subclass
<join-subclass
....
<join-subclass
.....
</join-subclass>
</join-subclass>