@Override public RequestDispatcher getNamedDispatcher(String name) { // Validate the name argument if (name == null) return (null); // Create and return a corresponding request dispatcher MobicentsSipServlet servlet = sipContext.findSipServletByName(name); if (servlet == null) return context.getNamedDispatcher(name); // return (null); if (servlet instanceof SipServletImpl) { return new SipRequestDispatcher((SipServletImpl) servlet); } else { return context.getNamedDispatcher(name); } }