Exception in thread "main" java.lang.ClassCastException: org.hibernate.mapping.JoinedSubclass
   at org.hibernate.cfg.AnnotationBinder.processElementAnnotations(AnnotationBinder.java:679)
   at org.hibernate.cfg.AnnotationBinder.processElementsOfAClass(AnnotationBinder.java:532)
   at org.hibernate.cfg.AnnotationBinder.bindClass(AnnotationBinder.java:382)
   at org.hibernate.cfg.AnnotationConfiguration.addAnnotatedClass(AnnotationConfiguration.java:44)
   at com.poss.saleswiz.ant.HibernateSchemaExporter.export(HibernateSchemaExporter.java:25)
   at com.poss.saleswiz.ant.HibernateSchemaExporter.main(HibernateSchemaExporter.java:52)

package com.poss.saleswiz.framework.businessobject;

import javax.ejb.Column;
import javax.ejb.Entity;
import javax.ejb.Id;
import javax.ejb.Inheritance;
import javax.ejb.InheritanceType;
import javax.ejb.Table;

@Entity
@Table(name = "swiz_employee")
@Inheritance(strategy = InheritanceType.JOINED)
public class Employee {

    private String code;
    private String firstName;
    private String middleName;
    private String lastName;
   
    /**
     * @return Returns the code.
     */
    @Id
    @Column(name = "employee_code", nullable = false)
    public String getCode() {
        return code;
    }
   
    /**
     * @param inCode The code to set.
     */
    public void setCode(String inCode) {
        code = inCode;
    }
   
    /**
     * @return Returns the firstName.
     */
    @Column(name = "first_name", nullable = false)
    public String getFirstName() {
        return firstName;
    }
   
    /**
     * @param inFirstName The firstName to set.
     */
    public void setFirstName(String inFirstName) {
        firstName = inFirstName;
    }
   
    /**
     * @return Returns the lastName.
     */
    @Column(name = "last_name", nullable = false)
    public String getLastName() {
        return lastName;
    }
   
    /**
     * @param inLastName The lastName to set.
     */
    public void setLastName(String inLastName) {
        lastName = inLastName;
    }
   
    /**
     * @return Returns the middleName.
     */
    @Column(name = "middle_name")
    public String getMiddleName() {
        return middleName;
    }
   
    /**
     * @param inMiddleName The middleName to set.
     */
    public void setMiddleName(String inMiddleName) {
        middleName = inMiddleName;
    }
   
}

package com.poss.saleswiz.framework.businessobject;

import javax.ejb.CascadeType;
import javax.ejb.Column;
import javax.ejb.Entity;
import javax.ejb.GeneratorType;
import javax.ejb.Id;
import javax.ejb.Inheritance;
import javax.ejb.InheritanceJoinColumn;
import javax.ejb.InheritanceType;
import javax.ejb.JoinColumn;
import javax.ejb.ManyToOne;
import javax.ejb.Table;

@Entity
@Table(name = "swiz_region_manager")
@Inheritance(strategy = InheritanceType.JOINED)
@InheritanceJoinColumn(name = "employee_code")
public class RegionManager extends Employee {
   
    private Integer id;
    private Region region;
   
    /**
     * @return Returns the id.
     */   
    @Column(name = "assoc_id", nullable = false)
    @Id(generate = GeneratorType.AUTO)
    public Integer getId() {
        return id;
    }
   
    /**
     * @param inId The id to set.
     */
    public void setId(Integer inId) {
        id = inId;
    }
   
    /**
     * @return Returns the region.
     */
    @ManyToOne(cascade = CascadeType.ALL)
    @JoinColumn(name = "region_id")
    public Region getRegion() {
        return region;
    }
   
    /**
     * @param inRegion The region to set.
     */
    public void setRegion(Region inRegion) {
        region = inRegion;
    }

}