public void test_allowEmptyGroupAndRole() {
        final AtomicBoolean allowEmptyPermission = new AtomicBoolean();
        ComponentUtil.setFessConfig(new FessConfig.SimpleImpl() {
            public boolean isLdapAllowEmptyPermission() {
                return allowEmptyPermission.get();
            }

            public String getRoleSearchUserPrefix() {
                return "1";
            }
        });

            logger.debug("Login failed.", e);
        }
        return OptionalEntity.empty();
    }

    protected boolean allowEmptyGroupAndRole(final LdapUser ldapUser) {
        if (fessConfig.isLdapAllowEmptyPermission()) {
            return true;
        }

        final SystemHelper systemHelper = ComponentUtil.getSystemHelper();
        for (final String permission : ldapUser.getPermissions()) {

     * The value is, e.g. true <br>
     * @return The determination, true or false. (if not found, exception but basically no way)
     */
    boolean isLdapAllowEmptyPermission();

    /**
     * Get the value for the key 'ldap.role.search.user.enabled'. <br>
     * The value is, e.g. true <br>