Question 1:
In reference guide 5.5:
"..you can use "extends" ..... use of this feature will make the ordering of the mapping documents important "

I am using the schema export tool to generate database schema and want to have classes in a hierachy in separate mapping documents and therefore "extends" is used.
How do I specify the ordering of mapping documents if class A extends class Z?
(because when it comes to mapping docuement for A, a message "cannot extends an upmapped class", as A will be mapped before Z in the default mapping sequence)

Question 2:

class D, E, F extends class W.
class X has a collection of Ws.

load X;
get collection of Ws;
for each W
HERE : how do i know whether W is instance of D or E or F? as

w.getClass() gives something ike "ackage.W$$EnhancerByCGLIB$$da5aeea5"
and
(W instanceof D), (W instanceof E), (W instanceof F) all result in false

Thankyou in advacnce for answers/ideas.
/Kwan

Read Chapter 16; inheritance mappings, choose a strategy and implement. (Table per class hierarchy, table per each subclass and table per concrete class)

hej !

I have done that I used table per subclass.
/Kwan

I lied.
The case is much more complicated.

class D, E, F extends abstract class G, G extends abstract class W.
class X has a collection of As.
A has a one-to-one relation to W.

load X;
get collection of As for X;
for each A
get W

HERE : how do i know whether W is instance of D or E or F? as

w.getClass() gives something ike "ackage.W$$EnhancerByCGLIB$$da5aeea5"
and
(W instanceof D), (W instanceof E), (W instanceof F) all result in false

table per subclass is used <joined-subclass>.

/Kwan

This is quite normal behaviour when using proxys. Use Hibernate.getClass(w).equals(F.class) or HibernateProxyHelper.getClass(w).equals(F.class)

tack s

Depends on the configuration method you use, in the cfg.xml it is the order of the mapping elements.