I am using Hibernate 3.1. I have a simple table Employee. I want to use discriminator on a column called Emp_Type_Id. A specific value of this discriminator should create a subclass called Manager. Can you please tell me what did I define wrong in following hbm.xml as it is not creating a subclass pojo?

Thanks in advance
R




<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping>
<class name="com.adf.business.Employee" discriminator-value="5" table="EMPLOYEE">
<id name="id" type="java.lang.Long" unsaved-value="null">
<column name="ID" precision="15" scale="0" />
<generator class="sequence">
<param name="sequence">EMPLOYEE_ID</param>
</generator>
</id>


<discriminator type="java.lang.Long" force="false" insert="true">
<column name="EMP_TYPE_ID"/>
</discriminator>

<version name="version" type="java.lang.Long">
<column name="VERSION" precision="10" scale="0" not-null="true" />
</version>

<many-to-one name="empType" class="com.adf.business.EmpType" fetch="select">
<column name="EMP_TYPE_ID" precision="10" scale="0" not-null="true" />
</many-to-one>

<many-to-one name="workObj" class="com.adf.business.WorkObj" fetch="select">
<column name="WORK_OBJECTIVE_ID" precision="15" scale="0" not-null="true" />
</many-to-one>

<property name="joinDate" type="date">
<column name="JOIN_DATE" length="7" not-null="true" />
</property>

<subclass name="Manager" discriminator-value="2">
<property name="joinDate" type="date">
<column name="JOIN_DATE" length="7"/>
</property>
</subclass>

</class>
</hibernate-mapping>