412 

   413 // Parse a string into a struct implementing Stanza -- this will be

   414 // either an Iq, a Message, or a Presence.

   415 func ParseStanza(str string) (Stanza, os.Error) {

   416 	r := strings.NewReader(str)

   417 	p := xml.NewParser(r)

   418 	tok, err := p.Token()

   419 	if err != nil {

   420 		return nil, err

   421 	}

   422 	se, ok := tok.(xml.StartElement)

   423 	if !ok {

   424 		return nil, os.NewError("Not a start element")

   425 	}

   426 	var stan Stanza

   427 	switch se.Name.Local {

   428 	case "iq":

   429 		stan = &Iq{}

   430 	case "message":

   431 		stan = &Message{}

   432 	case "presence":

   433 		stan = &Presence{}

   434 	default:

   435 		return nil, os.NewError("Not iq, message, or presence")

   436 	}

   437 	err = p.Unmarshal(stan, &se)

   438 	if err != nil {

   439 		return nil, err

   440 	}

   441 	return stan, nil

   442 }