* @param subject
     *            the subject to set
     */
    protected void setSubject ( Subject subject ) {
        this.subject = subject;
    }


    @Override
    public void refresh () throws CIFSException {
        // custom Kerb5Authenticators need to override this method for support
        throw new SmbUnsupportedOperationException("Refreshing credentials is not supported by this authenticator");
    }

    /**
     * @return subject associated with the credentials
     */
    Subject getSubject ();


    /**
     * @throws CIFSException
     * 
     */
    void refresh () throws CIFSException;

            super(subject, domain, username, password);
        }


        @Override
        public void refresh () throws CIFSException {
            try {
                System.out.println("Refreshing");
                setSubject(getInitiatorSubject(getTestUser(), getTestUserPassword(), getTestUserDomainRequired(), null));

            return (T) this;
        }
        return null;
    }


    @Override
    public Subject getSubject () {
        return null;
    }


    @Override
    public void refresh () throws CIFSException {}


    /**
     * 
     * {@inheritDoc}
     *
     * @see jcifs.smb.CredentialsInternal#createContext(jcifs.CIFSContext, java.lang.String, java.lang.String, byte[],

        to.cachedSubject = from.cachedSubject;
    }


    /**
     * {@inheritDoc}
     *
     * @see jcifs.smb.Kerb5Authenticator#refresh()
     */
    @Override
    public void refresh () throws CIFSException {
        log.debug("Refreshing JAAS credentials");
        this.cachedSubject = null;
    }


    /**
     * {@inheritDoc}
     *

        try ( SmbSessionImpl treesess = t.getSession() ) {
            if ( treesess.getCredentials().isAnonymous() || treesess.getCredentials().isGuest() ) {
                // refresh anonymous session or fallback to anonymous from guest login
                try ( SmbSessionInternal s = trans

        final boolean doSigning = securityMode != 0 && !anonymous;
        long newSessId = 0;
        long curSessId = this.sessionId;

        synchronized ( trans ) {
            this.credentials.refresh();
            Subject s = this.credentials.getSubject();
            SSPContext ctx = createContext(trans, tdomain, negoResp, doSigning, s);
            while ( true ) {
                token = createToken(ctx, token, s);