<?xml version="1.0"?>

<!DOCTYPE hibernate-mapping PUBLIC
    "-//Hibernate/Hibernate Mapping DTD 2.0//EN"
    "http://hibernate.sourceforge.net/hibernate-mapping-2.0.dtd">

<hibernate-mapping>
    <class
        name="org.ActorImpl"
        table="ACTOR"
        dynamic-update="false"
        dynamic-insert="false"
        discriminator-value="Actor"
    >

        <id
            name="id"
            column="id"
            type="string"
            unsaved-value="null"
        >
            <generator class="assigned">
            </generator>
        </id>

        <discriminator
            column="subclass"
            type="string"
        />

        <subclass
            name="org.GroupImpl"
            dynamic-update="false"
            dynamic-insert="false"
            discriminator-value="Group"
        >
        <property
            name="name"
            type="string"
            update="true"
            insert="true"
            column="name"
        />

        <property
            name="type"
            type="string"
            update="true"
            insert="true"
            column="type_"
        />

        <set
            name="memberships"
            lazy="true"
            inverse="false"
            cascade="all"
            sort="unsorted"
        >

              <key
                  column="group_"
              />

              <one-to-many
                  class="org.MembershipImpl"
              />
        </set>

        <many-to-one
            name="parent"
            class="org.GroupImpl"
            cascade="all"
            outer-join="auto"
            update="true"
            insert="true"
            column="parent"
        />

        <set
            name="children"
            lazy="true"
            inverse="false"
            cascade="all"
            sort="unsorted"
        >

              <key
                  column="parent"
              />

              <one-to-many
                  class="org.GroupImpl"
              />
        </set>

        </subclass>
        <subclass
            name="org.UserImpl"
            dynamic-update="false"
            dynamic-insert="false"
            discriminator-value="User"
        >
        <property
            name="firstName"
            type="string"
            update="true"
            insert="true"
            column="firstName"
        />

        <property
            name="lastName"
            type="string"
            update="true"
            insert="true"
            column="lastName"
        />

        <property
            name="email"
            type="string"
            update="true"
            insert="true"
            column="email"
        />

        <set
            name="memberships"
            lazy="true"
            inverse="false"
            cascade="all"
            sort="unsorted"
        >

              <key
                  column="user_"
              />

              <one-to-many
                  class="org..MembershipImpl"
              />
        </set>
        </subclass>
    </class>
</hibernate-mapping>

package org;

/**
* @hibernate.class table="ACTOR" discriminator-value="Actor"
* @hibernate.discriminator column="subclass" type="string"
*/
public abstract class ActorImpl implements Actor, Comparable {

  /**
   * @hibernate.id column="id" type="string" unsaved-value="null" generator-class="assigned"
   */   
  public String getId() { return this.id; }
  public void setId(String id) { this.id = id; }

  // toString
  public String toString() {
    String className = this.getClass().getName();
    int to = className.length();
    if ( className.endsWith( "Impl" ) ) {
      to = to - 4;
    }
    int from = className.lastIndexOf( '.' ) + 1;
    className = className.substring( from, to );
    return className + "[" + id + "]"; 
  }
 
  // equals
  public boolean equals( Object object ) {
    boolean isEqual = false;
    if ( ( object != null )
         && ( object instanceof ActorImpl ) ) {
           ActorImpl actor = (ActorImpl) object;
      if ( ( this.id == null )
           && ( actor.id == null ) ) {
        isEqual = ( this == actor );
      } else if ( ( this.id != null )
                  && ( actor.id != null ) ) {
        isEqual = this.id.equals( actor.id );
      }
    }
    return isEqual;
  }
 
  // hashCode
  public int hashCode() {
    int hashCode = 0;
    if ( id != null ) {
      hashCode = id.hashCode();
    } else {
      super.hashCode();
    }
    return hashCode;
  }

  // compareTo 
  public int compareTo(Object object) {
    int difference = -1;
   
    ActorImpl actor = (ActorImpl) object;
    if ( ( actor != null )
         && ( this.id != null )
         && ( actor.id != null ) ) {
      difference = this.id.compareTo( actor.id );
    } else {
      throw new RuntimeException( "can't compare two actors this(" + this + ") and object(" + object + ")" );
    }

    return difference;
  }

  protected String id = null;
}

package org;

import java.util.*;

/**
* @hibernate.subclass discriminator-value="User"
*/
public class UserImpl extends ActorImpl implements User {
 
  /**
   * @hibernate.property type="string" column="firstName"
   */
  public String getFirstName() { return firstName; }
  public void setFirstName(String firstName) { this.firstName = firstName; }
 
  /**
   * @hibernate.property type="string" column="lastName"
   */
  public String getLastName() { return lastName; }
  public void setLastName(String lastName) { this.lastName = lastName; }
 
  /**
   * @hibernate.property type="string" column="email"
   */
  public String getEmail() { return email; }
  public void setEmail(String email) { this.email = email; }
 
  /**
   * @hibernate.set lazy="true" cascade="all"
   * @hibernate.collection-key column="user_"
   * @hibernate.collection-one-to-many class="org.MembershipImpl"
   */
  public Collection getMemberships() { return memberships; }
  public void setMemberships(Collection memberships) { this.memberships = memberships; }

  // wrapper method
  public String getName() {
    return getFirstName() + " " + getLastName();
  }
 
  // private members
  private String firstName = null;
  private String lastName = null;
  private String email = null;
  private Collection memberships = null;
}

package org;

import java.util.*;

/**
* @hibernate.subclass discriminator-value="Group"
*/
public class GroupImpl extends ActorImpl implements Group {
 
  /**
   * @hibernate.property type="string" column="name"
   */
  public String getName() { return this.name; }
  public void setName(String name) { this.name = name; }
 
  /**
   * @hibernate.property type="string" column="type_"
   */
  public String getType() { return type; }
  public void setType(String type) { this.type = type; }
 
  /**
   * @hibernate.set lazy="true" cascade="all"
   * @hibernate.collection-key column="group_"
   * @hibernate.collection-one-to-many class="org.MembershipImpl"
   */
  public Collection getMemberships() { return memberships; }
  public void setMemberships(Collection memberships) { this.memberships = memberships; }
 
  /**
   * @hibernate.many-to-one class="org.GroupImpl"
   *  cascade="all"
   */
  public Group getParent() { return parent; }
  public void setParent(Group parent) { this.parent = parent; }
 
  /**
   * @hibernate.set lazy="true" cascade="all"
   * @hibernate.collection-key column="parent"
   * @hibernate.collection-one-to-many class="org.GroupImpl"
   */
  public Collection getChildren() { return children; }
  public void setChildren(Collection children) { this.children = children; }
 
  // private members
  private String name = null;
  private String type = null;
  private Collection memberships = null;
  private Group parent = null;
  private Collection children = null;
}