public class GeneratedIdentifierGenerator implements IdentifierGenerator,
      Configurable {

   /**
    * The delegate parameter specifies the underlying id generator to use.
    */
   public static final String DELEGATE = "delegate";

   private IdentifierGenerator assignedGenerator;

   private IdentifierGenerator delegateGenerator;

   /*
    * (non-Javadoc)
    *
    * @see org.hibernate.id.IdentifierGenerator#generate(org.hibernate.engine.SessionImplementor,
    *      java.lang.Object)
    */
   public Serializable generate(SessionImplementor session, Object object)
         throws HibernateException {
      if (object instanceof BoundedJavaBean) {
         BoundedJavaBean bean = (BoundedJavaBean) object;
         if (bean.getId() != null)
            // The bean already has an id, so tell hibernate it is already
            // assigned
            return assignedGenerator.generate(session, object);
         else
            // Use the real generation strategy if no id was set for the
            // bean
            return delegateGenerator.generate(session, object);
      } else {
         // Use the real generation strategy if the object is not a
         // BoundedJavaBean
         return delegateGenerator.generate(session, object);
      }
   }

   /*
    * (non-Javadoc)
    *
    * @see org.hibernate.id.Configurable#configure(org.hibernate.type.Type,
    *      java.util.Properties, org.hibernate.dialect.Dialect)
    */
   public void configure(Type type, Properties params, Dialect d)
         throws MappingException {
      String generatorName = params.getProperty(DELEGATE);
      if (generatorName == null)
         throw new MappingException(
               "param named \"delegate\" is required for object generation strategy");
      
      // Create the delegate and assigned id generators
      delegateGenerator = IdentifierGeneratorFactory.create(generatorName,
            type, params, d);
      assignedGenerator = IdentifierGeneratorFactory.create("assigned", type,
            params, d);
   }

}

        <id name="id" type="long">
            <generator class="com.estatcamp.sci.db.GeneratedIdentifierGenerator">
                <param name="delegate">seqhilo</param>
                <param name="sequence">hi_value_equipment</param>
                <param name="max_lo">100</param>
            </generator>
        </id>
--------------------------
        <id name="id" type="long">
            <generator class="seqhilo">
                <param name="sequence">hi_value</param>
                <param name="max_lo">100</param>
            </generator>
   </id>