JibX: how to output the fields from a particular class into different parts of the XML

Question

I've managed to get what I want when mapping with inheritance like this:

ThisClassShouldntExist

• freeFlowMsg
• errorMsg

BaseForm extends ThisClassShouldntExist

• function
• subFunction

SpecificForm extends BaseForm

• address

My binding.xml:

<binding>
    <mapping class="com.struts.form.ThisClassShouldntExist" abstract="true">
     <value name="free-flow-message" field="freeFlowMessage" />
     <value name="error-msg" field="errorMessage" />
    </mapping> 

    <mapping class="com.struts.form.BaseForm" abstract="true">
     <value name="prog-name" field="function" />
     <value name="sub-prog-name" field="subFunction" />
    </mapping>

    <mapping name="cngaddress" class="com.struts.form.AddressDisplayForm">
     <structure name="header">
      <structure map-as="com.struts.form.BaseForm" usage="optional" />
     </structure>

     <value name="address" field="addressline1" usage="optional"/>

     <structure name="FOOTER">
      <structure map-as="com.struts.form.ThisClassShouldntExist" usage="optional" />
     </structure>
    </mapping> 
</binding>

A sample data:

<?xml version="1.0" encoding="UTF-8"?>
<cngaddress>
  <header>
    <prog-name>prog-name</prog-name>
    <sub-prog-name>sub-prog-name</sub-prog-name>
  </header>
  <address>address</address>
  <FOOTER>
    <free-flow-message>free-flow-message</free-flow-message>
    <error-msg>error-msg</error-msg>
  </FOOTER>
</cngaddress>

---

So, the bottom line is that I need to "split" the output of the class BaseForm into 2 different part of the XML output. First part goes into <header>, second into <footer>, but also I want to avoid the inheritance just to comply with JibX.

I tried doing something like this but didn't work:

<structure name="FOOTER">
<structure field="aFieldFromSuperClassBaseForm" map-as="com.struts.form.ThisClassShouldntExist" usage="optional" />
</structure>

Also tried to define 2 <mapping> in the same binding for the same class, but of course it wouldn't work.