How to make CXF interceptorchain unwind without throw a fault

[June Kobol]

Hi all,
      In such a case, I need to authenticate the user's login information.
Luckily, CXF provides interceptors to deal with SOAP message.  I can
implement the function using an interceptor. Generally, if the user is
invalid, then  the interceptor may throw a Fault, or a derivative of a
Fault like the SoapFault. But in my program, I cannot throw a fault,
instead of returning an error code which woud be added into soap response
header. In the meantime, the InterceptorChain stops invoking and unwind it.
 How can I accomplish mypurpose?
      Excepting your reply.

regards,
        kobol