Restricting hidden files to upload

[Faseela Mohamed]

Hi

Is there a way to restrict the hidden files to be uploaded in to the
folders.
Right now I am deleting the hidden file on onUploadStart and onUploadEnd
methods. It still upload the file and deletes. Is there an option to
restrict certain types of files. Any help is appreciated .. Thanks

    public FtpletResult onUploadStart(FtpSession session, FtpRequest
request)
            throws FtpException, IOException {
            System.out.println("User uploaded FtpServer");
        List< ? extends FtpFile > ftpFileList =
session.getFileSystemView().getWorkingDirectory().listFiles();
        for (FtpFile ftpFile :ftpFileList ){
            System.out.println(ftpFile.getName());
            if (defaultLogin.equals(session.getUser())) ftpFile.delete();
            if(ftpFile.isHidden()) {
                ftpFile.delete();
                return FtpletResult.SKIP;
            }
        }
        return super.onUploadStart(session, request);
    }