Am I correct in thinking that the @In and @Out annotations will only inject/outject named seam components?

e.g. I cannot use @In to inject a String variable (placed into the session by an external servlet) into a Seam Component instance variable.

Servlet

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

 // Lookup dealerId
 String dealerId = request.getParameter("dealerId");

 // Store dealerId in session
 HttpSession session = request.getSession(true);
 session.setAttribute("dealerId", dealerId);

 // Forward request
 RequestDispatcher rd = request.getRequestDispatcher("/index.jsf");
 rd.forward(request, response);
 }

@In
 private String dealerId;

 public String someAction() {
 System.out.println("dealerId=" + dealerId);
 return "home";
 }