}

    String getLdapAdminUserBaseDn();

    default String getLdapAdminUserSecurityPrincipal(final String name) {
        final StringBuilder buf = new StringBuilder(100);
        buf.append(String.format(getLdapAdminUserFilter(), LdapUtil.escapeValue(name)));
        if (StringUtil.isNotBlank(getLdapAdminUserBaseDn())) {
            buf.append(',').append(getLdapAdminUserBaseDn());

            @Override
            public String getLdapAdminUserFilter() {
                return "uid=%s";
            }

            @Override
            public String getLdapAdminUserBaseDn() {
                return "ou=users,dc=example,dc=com";
            }
        };

        // Normal name

        if (!fessConfig.isLdapAdminEnabled(user.getName())) {
            return;
        }

        final Supplier<Hashtable<String, String>> adminEnv = this::createAdminEnv;
        search(fessConfig.getLdapAdminUserBaseDn(), fessConfig.getLdapAdminUserFilter(user.getName()), null, adminEnv, result -> {
            if (!result.isEmpty()) {

     * comment: Base DN for LDAP admin user.
     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     */
    String getLdapAdminUserBaseDn();

    /**
     * Get the value for the key 'ldap.admin.user.object.classes'. <br>
     * The value is, e.g. organizationalPerson,top,person,inetOrgPerson <br>