public void execute()

in core/src/main/java/org/apache/ftpserver/command/impl/MD5.java [57:165]
91 lines of code
14 McCabe index (conditional complexity)

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

        // reset state variables
        session.resetState();

        boolean isMMD5 = false;

        if ("MMD5".equals(request.getCommand())) {
            isMMD5 = true;
        }

        // print file information
        String argument = request.getArgument();

        if (argument == null || argument.trim().length() == 0) {
            session
                    .write(LocalizedFtpReply
                            .translate(
                                    session,
                                    request,
                                    context,
                                    FtpReply.REPLY_504_COMMAND_NOT_IMPLEMENTED_FOR_THAT_PARAMETER,
                                    "MD5.invalid", null));
            return;
        }

        String[] fileNames = null;
        if (isMMD5) {
            fileNames = argument.split(",");
        } else {
            fileNames = new String[] { argument };
        }

        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < fileNames.length; i++) {
            String fileName = fileNames[i].trim();

            // get file object
            FtpFile file = null;

            try {
                file = session.getFileSystemView().getFile(fileName);
            } catch (Exception ex) {
                LOG.debug("Exception getting the file object: " + fileName, ex);
            }

            if (file == null) {
                session
                        .write(LocalizedFtpReply
                                .translate(
                                        session,
                                        request,
                                        context,
                                        FtpReply.REPLY_504_COMMAND_NOT_IMPLEMENTED_FOR_THAT_PARAMETER,
                                        "MD5.invalid", fileName));
                return;
            }

            // check file
            if (!file.isFile()) {
                session
                        .write(LocalizedFtpReply
                                .translate(
                                        session,
                                        request,
                                        context,
                                        FtpReply.REPLY_504_COMMAND_NOT_IMPLEMENTED_FOR_THAT_PARAMETER,
                                        "MD5.invalid", fileName));
                return;
            }

            InputStream is = null;
            try {
                is = file.createInputStream(0);
                String md5Hash = md5(is);

                if (i > 0) {
                    sb.append(", ");
                }
                boolean nameHasSpaces = fileName.indexOf(' ') >= 0;
                if(nameHasSpaces) {
                    sb.append('"');
                }
                sb.append(fileName);
                if(nameHasSpaces) {
                    sb.append('"');
                }
                sb.append(' ');
                sb.append(md5Hash);

            } catch (NoSuchAlgorithmException e) {
                LOG.debug("MD5 algorithm not available", e);
                session.write(LocalizedFtpReply.translate(session, request, context,
                        FtpReply.REPLY_502_COMMAND_NOT_IMPLEMENTED,
                        "MD5.notimplemened", null));
            } finally {
                IoUtils.close(is);
            }
        }
        if (isMMD5) {
            session.write(LocalizedFtpReply.translate(session, request, context,
                    252, "MMD5", sb.toString()));
        } else {
            session.write(LocalizedFtpReply.translate(session, request, context,
                    251, "MD5", sb.toString()));
        }
    }