Hibernate 3x with sub class

[dilan]

Hello,
My database object are setup as follows

OnlineUser.class
MainUser extends OnlineUser
OnlineUser extends OnlineUser

and
Property.class

where OnlineUser can have many property.

Mapping documents:
I got following two mappings
for user obj;

  <subclass discriminator-value="O" name="com.wf.core.OnlineUser"> 
  <subclass discriminator-value="M" name="com.wf.core.MainUser"> 
 </subclass> 
  <subclass discriminator-value="T" name="com.wf.core.TopicUser"> 
 </subclass> 
 </subclass>

where classes are define as follows ;

public class OnlineUser extends User {} 
public class MainUser extends MainUser{} 
public class TopicUser extends OnlineUser {}

then i got a property obj;

<many-to-one class="com.wf.core.User" name="user" not-null="true"> 
      <column name="property_user"/> 
    </many-to-one>

The issue is,
i want to list the properties that belong to Topic User, how do i generate the Criteria for that.


so far..

Criteria crit = wf.getSession().createCriteria( 
            Property.class);

now how do i check if property is belong to TopicUser, not MainUser or User?