public void execute()

in core/src/main/java/org/apache/ftpserver/command/impl/RNTO.java [53:152]
84 lines of code
8 McCabe index (conditional complexity)

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

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

            // get the "rename from" file object
            FtpFile frFile = session.getRenameFrom();
            if (frFile == null) {
                session.write(LocalizedRenameFtpReply.translate(session, request, context,
                        FtpReply.REPLY_503_BAD_SEQUENCE_OF_COMMANDS, "RNTO",
                        null, null, null));
                return;
            }

            // get target file
            FtpFile toFile = null;
            try {
                toFile = session.getFileSystemView().getFile(toFileStr);
            } catch (Exception ex) {
                LOG.debug("Exception getting file object", ex);
            }
            if (toFile == null) {
                session
                        .write(LocalizedRenameFtpReply
                                .translate(
                                        session,
                                        request,
                                        context,
                                        FtpReply.REPLY_553_REQUESTED_ACTION_NOT_TAKEN_FILE_NAME_NOT_ALLOWED,
                                        "RNTO.invalid", null, frFile, toFile));
                return;
            }
            toFileStr = toFile.getAbsolutePath();

            // check permission
            if (!toFile.isWritable()) {
                session
                        .write(LocalizedRenameFtpReply
                                .translate(
                                        session,
                                        request,
                                        context,
                                        FtpReply.REPLY_553_REQUESTED_ACTION_NOT_TAKEN_FILE_NAME_NOT_ALLOWED,
                                        "RNTO.permission", null, frFile, toFile));
                return;
            }

            // check file existence
            if (!frFile.doesExist()) {
                session
                        .write(LocalizedRenameFtpReply
                                .translate(
                                        session,
                                        request,
                                        context,
                                        FtpReply.REPLY_553_REQUESTED_ACTION_NOT_TAKEN_FILE_NAME_NOT_ALLOWED,
                                        "RNTO.missing", null, frFile, toFile));
                return;
            }

            // save away the old path
            String logFrFileAbsolutePath = frFile.getAbsolutePath();
            
            // now rename
            if (frFile.move(toFile)) {
                session.write(LocalizedRenameFtpReply.translate(session, request, context,
                        FtpReply.REPLY_250_REQUESTED_FILE_ACTION_OKAY, "RNTO",
                        toFileStr, frFile, toFile));

                LOG.info("File rename from \"{}\" to \"{}\"", logFrFileAbsolutePath, 
                        toFile.getAbsolutePath());
            } else {
                session
                        .write(LocalizedRenameFtpReply
                                .translate(
                                        session,
                                        request,
                                        context,
                                        FtpReply.REPLY_553_REQUESTED_ACTION_NOT_TAKEN_FILE_NAME_NOT_ALLOWED,
                                        "RNTO", toFileStr, frFile, toFile));
            }

        } finally {
            session.resetState();
        }
    }