How are WSDL faults encoded in the ESB Fault object?

[objectiser]

I am receiving a WSDL fault in a custom ESB action, and want to return the fault name in an ESB Fault object.

I receive the fault name as a QName, but the Fault.setCode takes a URI.

Just wondering how faults are returned from the ESB action pipeline, when the ESB service is providing a Web Service implementation, so that it gets correctly returned to the WS client as a SOAP fault?

[objectiser]

The approach I found was to instantiate a org.jboss.soa.esb.actions.ActionProcessingDetailFaultException exception, which takes the fault name (QName) as a constructor arg, and then retrieve the Message from it, which had the appropriately initialised Fault object associated with it.

However the actual fault QName is stored in a named body entry (org.jboss.soa.esb.message.fault.detail.code).

So I assume it is quite valid for subsequent ESB actions to obtain the fault QName from this body entry? I ask because I don't see this entry name documented anywhere?