/**
     * @return
     */
    protected abstract Credentials getDefaultCredentials ();


    /**
     * {@inheritDoc}
     *
     * @see jcifs.CIFSContext#renewCredentials(java.lang.String, java.lang.Throwable)
     */
    @Override
    public boolean renewCredentials ( String locationHint, Throwable error ) {
        return false;
    }


    /**
     * {@inheritDoc}
     *