if (username == null) {
            value = StringUtil.EMPTY;
        } else if (maxLength >= 0 && username.length() > maxLength) {
            value = LdapUtil.escapeValue(username.substring(0, maxLength));
        } else {
            value = LdapUtil.escapeValue(username);
        }
        return String.format(getSystemProperty(Constants.LDAP_SECURITY_PRINCIPAL, StringUtil.EMPTY), value);
    }

     * @see <a href="https://tools.ietf.org/html/rfc4515">RFC 4515 - LDAP String Representation of Search Filters</a>
     * @deprecated Use {@link LdapUtil#escapeValue(String)} instead
     */
    @Deprecated
    protected String escapeLDAPSearchFilter(final String filter) {
        return LdapUtil.escapeValue(filter);
    }

    /**
     * Normalizes a permission name based on configuration settings.
     *