I am new to using hibernate and XDoclet so please be patient with me.

I am having problems using hibernate and discriminator values and getting XDoclet to generate my hbm.xml files correctly.


Here is the setup below.
The interface:

public interface Entity{
public abstract Integer getEntityID();
}

Then I have an abstract class which extends the interface
/**
* @hibernate.class table="employee"
* @hibernate.discriminator column="type"
*/
public abstract class Person implements Entity{
public Integer getEntitiyID(){
return null;
}
::should essentiall be empty::
}

Then I have my base class:
/**
* @hibernate.subclass discriminator-value="price" table="products"
*/
public class Employee extends Person{
::: methods are here::
}

I am using hibernate version 3.0,XDoclet 1.2.3.

The reason I have to use 3 classes is due to a bug in XDoclet that does not recognize the "Implements" keyword. I have my hbm.xml file being generated via XDoclet and the sublcass is not showing the "table" attribute inside of the "<subclass>" element. I need to be able to use discriminator values as I am looking to make a more generic class that can take any type of Person ie ... Employee, Neighbor, Contact etc... and have this code work.

Does anyone know how I go about really using discriminator values or can lead me to a good tutorial on them. I also was wondering if anyone knew why when XDoclet generates my hbm.xml file why in the subclass the "table" attribute is left out every time. I also get an error when XDoclet runs complaining about an ID that needs to be put in same class as the one that specifies the @hibernate.class attribute.

Any help or assistance would be much apperciated.

Discriminator values are useful for the table-per-class-hierarchy strategy, since data from all descendents of the base class are stored in the same table.

It looks like you are attempting to use the table-per-sublcass strategy, which is implemented using joined-subclass. Read the guide and decide which solves your problem:

http://www.hibernate.org/hib_docs/v3/re ... tance.html

Hope this helps,

Chris