public void execute()

in core/src/main/java/org/apache/ftpserver/command/impl/MKD.java [54:120]
50 lines of code
7 McCabe index (conditional complexity)

    public void execute(final FtpIoSession session,
            final FtpServerContext context, final FtpRequest request)
            throws IOException, FtpException {

        // reset state
        session.resetState();

        // argument check
        String fileName = request.getArgument();
        if (fileName == null) {
            session.write(LocalizedFileActionFtpReply.translate(session, request, context,
                    FtpReply.REPLY_501_SYNTAX_ERROR_IN_PARAMETERS_OR_ARGUMENTS,
                    "MKD", null, null));
            return;
        }

        // get file object
        FtpFile file = null;
        try {
            file = session.getFileSystemView().getFile(fileName);
        } catch (Exception ex) {
            LOG.debug("Exception getting file object", ex);
        }
        if (file == null) {
            session.write(LocalizedFileActionFtpReply.translate(session, request, context,
                    FtpReply.REPLY_550_REQUESTED_ACTION_NOT_TAKEN,
                    "MKD.invalid", fileName, file));
            return;
        }

        // check permission
        fileName = file.getAbsolutePath();
        if (!file.isWritable()) {
            session.write(LocalizedFileActionFtpReply.translate(session, request, context,
                    FtpReply.REPLY_550_REQUESTED_ACTION_NOT_TAKEN,
                    "MKD.permission", fileName, file));
            return;
        }

        // check file existance
        if (file.doesExist()) {
            session.write(LocalizedFileActionFtpReply.translate(session, request, context,
                    FtpReply.REPLY_550_REQUESTED_ACTION_NOT_TAKEN,
                    "MKD.exists", fileName, file));
            return;
        }

        // now create directory
        if (file.mkdir()) {
            session.write(LocalizedFileActionFtpReply.translate(session, request, context,
                    FtpReply.REPLY_257_PATHNAME_CREATED, "MKD", fileName, file));

            // write log message
            String userName = session.getUser().getName();
            LOG.info("Directory create : " + userName + " - " + fileName);

            // notify statistics object
            ServerFtpStatistics ftpStat = (ServerFtpStatistics) context
                    .getFtpStatistics();
            ftpStat.setMkdir(session, file);

        } else {
            session.write(LocalizedFileActionFtpReply.translate(session, request, context,
                    FtpReply.REPLY_550_REQUESTED_ACTION_NOT_TAKEN, "MKD",
                    fileName, file));
        }
    }