}

// UnmarshalXML - decodes XML data.
func (arn *ARN) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
	var s string
	if err := d.DecodeElement(&s, &start); err != nil {
		return err
	}

	parsedARN, err := parseARN(s)
	if err != nil {
		return err
	}

	*arn = *parsedARN
	return nil
}

// parseARN - parses string to ARN.
func parseARN(s string) (*ARN, error) {

func Parse(arnStr string) (arn ARN, err error) {
	ps := strings.Split(arnStr, ":")
	if len(ps) != 6 || ps[0] != string(arnPrefixArn) {
		err = errors.New("invalid ARN string format")
		return
	}

	if ps[1] != string(arnPartitionMinio) {
		err = errors.New("invalid ARN - bad partition field")
		return
	}

	if ps[2] != string(arnServiceIAM) {
		err = errors.New("invalid ARN - bad service field")
		return