private void initialize()

in intg/src/main/java/org/apache/atlas/security/InMemoryJAASConfiguration.java [258:384]
98 lines of code
21 McCabe index (conditional complexity)

    private void initialize(Properties properties) {
        LOG.debug("==> InMemoryJAASConfiguration.initialize()");

        int                             prefixLen   = JAAS_CONFIG_PREFIX_PARAM.length();
        Map<String, SortedSet<Integer>> jaasClients = new HashMap<>();

        for (String key : properties.stringPropertyNames()) {
            if (key.startsWith(JAAS_CONFIG_PREFIX_PARAM)) {
                String          jaasKey    = key.substring(prefixLen);
                StringTokenizer tokenizer  = new StringTokenizer(jaasKey, ".");
                int             tokenCount = tokenizer.countTokens();

                if (tokenCount > 0) {
                    String             clientId      = tokenizer.nextToken();
                    SortedSet<Integer> indexList     = jaasClients.computeIfAbsent(clientId, k -> new TreeSet<>());
                    String             indexStr      = tokenizer.nextToken();
                    Integer            clientIdIndex = isNumeric(indexStr) ? Integer.parseInt(indexStr) : -1;

                    indexList.add(clientIdIndex);
                }
            }
        }

        for (String jaasClient : jaasClients.keySet()) {
            for (Integer index : jaasClients.get(jaasClient)) {
                String keyPrefix = JAAS_CONFIG_PREFIX_PARAM + jaasClient + ".";

                if (index > -1) {
                    keyPrefix = keyPrefix + index + ".";
                }

                String keyParam        = keyPrefix + JAAS_CONFIG_LOGIN_MODULE_NAME_PARAM;
                String loginModuleName = properties.getProperty(keyParam);

                if (loginModuleName == null) {
                    LOG.error("Unable to add JAAS configuration for client [{}] as it is missing param [{}]. Skipping JAAS config for [{}]", jaasClient, keyParam, jaasClient);
                    continue;
                } else {
                    loginModuleName = loginModuleName.trim();
                }

                keyParam = keyPrefix + JAAS_CONFIG_LOGIN_MODULE_CONTROL_FLAG_PARAM;

                String controlFlag = properties.getProperty(keyParam);

                AppConfigurationEntry.LoginModuleControlFlag loginControlFlag;

                if (controlFlag != null) {
                    controlFlag = controlFlag.trim().toLowerCase();

                    switch (controlFlag) {
                        case "optional":
                            loginControlFlag = AppConfigurationEntry.LoginModuleControlFlag.OPTIONAL;
                            break;
                        case "requisite":
                            loginControlFlag = AppConfigurationEntry.LoginModuleControlFlag.REQUISITE;
                            break;
                        case "sufficient":
                            loginControlFlag = AppConfigurationEntry.LoginModuleControlFlag.SUFFICIENT;
                            break;
                        case "required":
                            loginControlFlag = AppConfigurationEntry.LoginModuleControlFlag.REQUIRED;
                            break;
                        default:
                            String validValues = "optional|requisite|sufficient|required";

                            LOG.warn("Unknown JAAS configuration value for ({}) = [{}], valid value are [{}] using the default value, REQUIRED", keyParam, controlFlag, validValues);

                            loginControlFlag = AppConfigurationEntry.LoginModuleControlFlag.REQUIRED;
                            break;
                    }
                } else {
                    LOG.warn("Unable to find JAAS configuration ({}); using the default value, REQUIRED", keyParam);

                    loginControlFlag = AppConfigurationEntry.LoginModuleControlFlag.REQUIRED;
                }

                Map<String, String> options         = new HashMap<>();
                String              optionPrefix    = keyPrefix + JAAS_CONFIG_LOGIN_OPTIONS_PREFIX + ".";
                int                 optionPrefixLen = optionPrefix.length();

                for (String key : properties.stringPropertyNames()) {
                    if (key.startsWith(optionPrefix)) {
                        String optionKey = key.substring(optionPrefixLen);
                        String optionVal = properties.getProperty(key);

                        if (optionVal != null) {
                            optionVal = optionVal.trim();

                            try {
                                if (optionKey.equalsIgnoreCase(JAAS_PRINCIPAL_PROP)) {
                                    optionVal = SecurityUtil.getServerPrincipal(optionVal, (String) null);
                                }
                            } catch (IOException e) {
                                LOG.warn("Failed to build serverPrincipal. Using provided value:[{}]", optionVal);
                            }
                        }

                        options.put(optionKey, optionVal);
                    }
                }

                AppConfigurationEntry entry = new AppConfigurationEntry(loginModuleName, loginControlFlag, options);

                if (LOG.isDebugEnabled()) {
                    StringBuilder sb = new StringBuilder();

                    sb.append("Adding client: [").append(jaasClient).append("{").append(index).append("}]\n");
                    sb.append("\tloginModule: [").append(loginModuleName).append("]\n");
                    sb.append("\tcontrolFlag: [").append(loginControlFlag).append("]\n");

                    for (String key : options.keySet()) {
                        String val = options.get(key);
                        sb.append("\tOptions:  [").append(key).append("] => [").append(val).append("]\n");
                    }

                    LOG.debug(sb.toString());
                }

                List<AppConfigurationEntry> retList = applicationConfigEntryMap.computeIfAbsent(jaasClient, k -> new ArrayList<>());

                retList.add(entry);
            }
        }

        LOG.debug("<== InMemoryJAASConfiguration.initialize({})", applicationConfigEntryMap);
    }