Child nodes truncated when using jaxb to marshall data into a SOAP header

I wish to serialise a CoordinationContext type (a complex type defined in the OASIS WS-COOR 1.1 spec) into a SOAP message header as follows:

<code>
final JAXBContext jaxbCtx = getJaxbContext();
final SOAPMessage soapMessage = context.getMessage();
final SOAPEnvelope soapEnvelope = soapMessage.getSOAPPart().getEnvelope();
SOAPHeader soapHeader = soapEnvelope.getHeader() ;
if (soapHeader == null)

Marshaller marshaller = jaxbCtx.createMarshaller();
marshaller.marshal(coordinationContext, soapHeader);
</code>

The problem is that the header gets inserted without any children.

What happens is that the marshaller creates a SOAP tree top down consisting of SOAPElementImpl instances. It inserts these nodes into the tree below the SOAPHeader as it creates them. So, when the first node is created a call to SOAPHeader.addchild() is made. This call deteccts that the supplied node is of the wrong type so it substitutes a SOAPHeaderElementImpl. It attempts to copy the supplied node's substructure but the marshaller has not created the children at this point.