public synchronized void save()

in core/src/main/java/org/apache/ftpserver/usermanager/impl/PropertiesUserManager.java [250:302]
43 lines of code
5 McCabe index (conditional complexity)

    public synchronized void save(User usr) throws FtpException {
        // null value check
        if (usr.getName() == null) {
            throw new NullPointerException("User name is null.");
        }
        String thisPrefix = PREFIX + usr.getName() + '.';

        // set other properties
        userDataProp.setProperty(thisPrefix + ATTR_PASSWORD, getPassword(usr));

        String home = usr.getHomeDirectory();
        if (home == null) {
            home = "/";
        }
        userDataProp.setProperty(thisPrefix + ATTR_HOME, home);
        userDataProp.setProperty(thisPrefix + ATTR_ENABLE, usr.getEnabled());
        userDataProp.setProperty(thisPrefix + ATTR_WRITE_PERM, usr
                .authorize(new WriteRequest()) != null);
        userDataProp.setProperty(thisPrefix + ATTR_MAX_IDLE_TIME, usr
                .getMaxIdleTime());

        TransferRateRequest transferRateRequest = new TransferRateRequest();
        transferRateRequest = (TransferRateRequest) usr
                .authorize(transferRateRequest);

        if (transferRateRequest != null) {
            userDataProp.setProperty(thisPrefix + ATTR_MAX_UPLOAD_RATE,
                    transferRateRequest.getMaxUploadRate());
            userDataProp.setProperty(thisPrefix + ATTR_MAX_DOWNLOAD_RATE,
                    transferRateRequest.getMaxDownloadRate());
        } else {
            userDataProp.remove(thisPrefix + ATTR_MAX_UPLOAD_RATE);
            userDataProp.remove(thisPrefix + ATTR_MAX_DOWNLOAD_RATE);
        }

        // request that always will succeed
        ConcurrentLoginRequest concurrentLoginRequest = new ConcurrentLoginRequest(
                0, 0);
        concurrentLoginRequest = (ConcurrentLoginRequest) usr
                .authorize(concurrentLoginRequest);

        if (concurrentLoginRequest != null) {
            userDataProp.setProperty(thisPrefix + ATTR_MAX_LOGIN_NUMBER,
                    concurrentLoginRequest.getMaxConcurrentLogins());
            userDataProp.setProperty(thisPrefix + ATTR_MAX_LOGIN_PER_IP,
                    concurrentLoginRequest.getMaxConcurrentLoginsPerIP());
        } else {
            userDataProp.remove(thisPrefix + ATTR_MAX_LOGIN_NUMBER);
            userDataProp.remove(thisPrefix + ATTR_MAX_LOGIN_PER_IP);
        }

        saveUserData();
    }