public class DropDownMenu
   private long dropDownMenuId;
   private boolean visible;
   private int rank;
   private String icon;
   private List<UIComponent> children;
   //Konstruktor, Getter und Setter

// Die Superklasse aus dem Framework
public class UIComponent

// Zu persistierende Subklassen:
public class MenuGroup extends HtmlMenuGroup {
   private long menuGroupId;
   private boolean visible;
   private int rank;
   private String icon;
   //Konstruktor, Getter und Setter

public class MenuItem extends HtmlMenuItem {
   private long menuItemId;
   private boolean visible;
   private int rank;
   private int toolBarGroup;
   private String icon;
   //Konstruktor, Getter und Setter

<hibernate-mapping package="crm.jsf.ui.menu">
  <class name="DropDownMenu" table="_dropDownMenu">
        <id name="dropDownMenuId" column="id">
           <generator class="native"/>
        </id>     
        <property name="visible" type="yes_no"/>     
        <property name="rank"/>   
        <property name="icon"/>       
        <list name="children" cascade="save-update">
   <key column="dropDownMenu_Id" not-null="true"/>
   <list-index column="children_index"/>
   <one-to-many class="crm.jsf.ui.menu.UIComponent"/>
        </list>       
  </class>
</hibernate-mapping>

<hibernate-mapping package="javax.faces.component">
   <class name="UIComponent" table="_uIComponent">
      <id name="uIComponentId" column="id">
           <generator class="native"/>
      </id>
   <discriminator column="uIComponent_typ" type="string"/>
   <subclass name="UIComponentBase" discriminator-value="Base">
   <subclass name="UIOutput" discriminator-value="output">
   <subclass name="UIMenuGroup" discriminator-value="group">
   <subclass name="html.HtmlMenuGroup" discriminator-value="htmlGroup">
   <subclass name="MenuGroup" discriminator-value="menuGroup">
   <property name="visible" type="yes_no"/>
   <property name="rank"/>
   <property name="icon"/>       
   <list name="children" cascade="save-update">
       <key column="dropDownMenu_Id" not-null="true"/>
       <list-index column="children_index"/>
       <one-to-many class="model.contact.contactobjects.UIComponent"/>
   </list>
   </subclass>
   </subclass>
   </subclass>
   </subclass>
   <subclass name="UICommand" discriminator-value="command">
   <subclass
      name="org.ajax4jsf.component.AjaxActionComponent" discriminator-
      value="ajaxCommand">
   <subclass name="org.richfaces.component.UIMenuItem" discriminator-value="item">
   <subclass name="org.richfaces.component.html.HtmlMenuItem" 
      discriminator-value="htmpItem">
   <subclass name="MenuItem" discriminator-value="menuItem">
          <property name="visible" type="yes_no"/>
          <property name="rank"/>
          <property name="icon"/>
          <property name="toolBarGroup"/>
          <property name="expression"/>
          <property name="expectedReturnType"/>
          <array name="expectedParamTypes"
                     table="_menuItem_expectedParamTypes">
                  <key column="menuItemMenuId"/>
                  <list-index column="expectedParamType_index"/>
                  <element column="expectedParamType"
                                 type="java.lang.string"/>
          </array>
    </subclass>
    </subclass>
    </subclass>
    </subclass>
    </subclass>
    </subclass>               
</class>   
</hibernate-mapping>