return null;
        }
        return str;
    }


    /**
     * {@inheritDoc}
     *
     * @see jcifs.SmbResourceLocator#getDfsPath()
     */
    @Override
    public String getDfsPath () {
        if ( this.dfsReferral == null ) {
            return null;
        }

     * this method will return the referral path to which it maps. Otherwise
     * <code>null</code> is returned.
     * 
     * @return URL to the DFS volume
     */
    String getDfsPath ();


    /**
     * @return the transport port, if specified
     */
    int getPort ();


    /**
     * @return the original URL
     */
    URL getURL ();


    /**

     * <code>null</code> is returned.
     * 
     * @return URL to the DFS volume
     * @throws SmbException
     */
    public String getDfsPath () throws SmbException {
        try {
            String path = this.treeConnection.ensureDFSResolved(this.fileLocator).getDfsPath();
            if ( path != null && isDirectory() ) {
                path += '/';
            }
            return path;
        }

    private boolean isExists;
    private int shareAccess = FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE;
    private SmbComBlankResponse blank_resp = null;
    private DfsReferral dfsReferral = null;  // For getDfsPath() and getServerWithDfs()

    protected static Dfs dfs;

    NtlmPasswordAuthentication auth; // Cannot be null
    SmbTree tree = null;             // Initially null