@Resource
    protected QueryFieldConfig queryFieldConfig;

    /** Helper for role-based query filtering and security. */
    @Resource
    protected RoleQueryHelper roleQueryHelper;

    /** Helper for managing user information and authentication. */
    @Resource
    protected UserInfoHelper userInfoHelper;

    /** Helper for OpenSearch Description Document (OSDD) functionality. */

            writeJsonResponse(HttpServletResponse.SC_BAD_REQUEST, escapeJsonKeyValue(MESSAGE_FIELD, "Referer is invalid."));
            return;
        }

        final RoleQueryHelper roleQueryHelper = ComponentUtil.getRoleQueryHelper();
        final SearchHelper searchHelper = ComponentUtil.getSearchHelper();

        final StringBuilder buf = new StringBuilder(255);
        try {

            logger.warn("[{}] The search log queue size is too large. Skipped the search log: {}", queryId, query);
            return;
        }

        final RoleQueryHelper roleQueryHelper = ComponentUtil.getRoleQueryHelper();
        final UserInfoHelper userInfoHelper = ComponentUtil.getUserInfoHelper();
        final SearchLog searchLog = new SearchLog();

        if (fessConfig.isUserInfo()) {

        RoleQueryHelper roleQueryHelper = new RoleQueryHelper();
        PermissionHelper permissionHelper = new PermissionHelper();

        ComponentUtil.register(systemHelper, "systemHelper");
        ComponentUtil.register(virtualHostHelper, "virtualHostHelper");
        ComponentUtil.register(keyMatchHelper, "keyMatchHelper");
        ComponentUtil.register(roleQueryHelper, "roleQueryHelper");