public static function textMatch($haystack, $needle, $collation, $matchType = 'contains')
    {
        switch ($collation) {
            case 'i;ascii-casemap':
                // default strtolower takes locale into consideration
                // we don't want this.
                $haystack = str_replace(range('a', 'z'), range('A', 'Z'), $haystack);
                $needle = str_replace(range('a', 'z'), range('A', 'Z'), $needle);
                break;

            case 'i;octet':
                // Do nothing
                break;

            case 'i;unicode-casemap':
                $haystack = mb_strtoupper($haystack, 'UTF-8');
                $needle = mb_strtoupper($needle, 'UTF-8');
                break;

            default:
                throw new Exception\BadRequest('Collation type: '.$collation.' is not supported');
        }

        switch ($matchType) {
            case 'contains':
                return false !== strpos($haystack, $needle);
            case 'equals':
                return $haystack === $needle;
            case 'starts-with':
                return 0 === strpos($haystack, $needle);
            case 'ends-with':
                return strrpos($haystack, $needle) === strlen($haystack) - strlen($needle);
            default:
                throw new Exception\BadRequest('Match-type: '.$matchType.' is not supported');
        }
    }