コード例 #1
0
ファイル: xml.go プロジェクト: pcdummy/golxml
func (p *Decoder) unmarshal(val reflect.Value, start gokoxml.Node) error {
	// Find first xml node.
	if start == nil {
		start = p.doc.Root().XmlNode
	}

	// Unpacks a pointer
	if pv := val; pv.Kind() == reflect.Ptr {
		if pv.IsNil() {
			pv.Set(reflect.New(pv.Type().Elem()))
		}
		val = pv.Elem()
	}

	var (
		sv    reflect.Value
		tinfo *typeInfo
		err   error
	)

	switch v := val; v.Kind() {
	default:
		return errors.New("unknown type " + v.Type().String())

		// TODO: Implement this once i understand Skip()
		// case reflect.Interface:
		// 	return p.Skip()

	case reflect.Slice:
		typ := v.Type()
		if typ.Elem().Kind() == reflect.Uint8 {
			// []byte
			if err := copyValue(v, start.Content()); err != nil {
				return err
			}
			break
		}

		// Slice of element values.
		// Grow slice.
		n := v.Len()
		if n >= v.Cap() {
			ncap := 2 * n
			if ncap < 4 {
				ncap = 4
			}
			new := reflect.MakeSlice(typ, n, ncap)
			reflect.Copy(new, v)
			v.Set(new)
		}
		v.SetLen(n + 1)

		// Recur to read element into slice.
		if err := p.unmarshal(v.Index(n), start); err != nil {
			v.SetLen(n)
			return err
		}
		return nil

	case reflect.Bool, reflect.Float32, reflect.Float64, reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64, reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr, reflect.String:
		if err := copyValue(v, start.Content()); err != nil {
			return err
		}

	case reflect.Struct:
		typ := v.Type()
		if typ == nameType {
			v.Set(reflect.ValueOf(xml.Name{Local: start.Name()}))
			break
		}
		if typ == timeType {
			if err := copyValue(v, start.Content()); err != nil {
				return err
			}
			break
		}

		sv = v
		tinfo, err = getTypeInfo(typ)
		if err != nil {
			return err
		}

		// Validate and assign element name.
		if tinfo.xmlname != nil {
			// var space string
			finfo := tinfo.xmlname
			if finfo.name != "" && finfo.name != start.Name() {
				return UnmarshalError("expected element type <" + finfo.name + "> but have <" + start.Name() + ">")
			}

			fv := sv.FieldByIndex(finfo.idx)
			if _, ok := fv.Interface().(xml.Name); ok {
				fv.Set(reflect.ValueOf(xml.Name{Local: start.Name()}))
			}
		}

		var saveComment reflect.Value
		var doSaveComment = false
		_ = saveComment

		for i := range tinfo.fields {
			finfo := &tinfo.fields[i]
			switch finfo.flags & fMode {
			case fAttr:
				strv := sv.FieldByIndex(finfo.idx)
				for name, a := range start.Attributes() {
					if name == finfo.name {
						copyValue(strv, a.Content())
					}
				}
			case fCharData:
				strv := sv.FieldByIndex(finfo.idx)
				copyValue(strv, start.Content())

			case fInnerXml:
				strv := sv.FieldByIndex(finfo.idx)
				// TODO: Not sure why i need to call FirstChild() here.
				copyValue(strv, start.FirstChild().String())

			case fComment:
				if !doSaveComment {
					doSaveComment = true
					saveComment = sv.FieldByIndex(finfo.idx)
				}
			}
		}

		for cur_node := start.FirstChild(); cur_node != nil; cur_node = cur_node.NextSibling() {
			if sv.IsValid() {
				if cur_node.NodeType() != gokoxml.XML_ELEMENT_NODE {
					if doSaveComment && cur_node.NodeType() == gokoxml.XML_COMMENT_NODE {
						copyValue(saveComment, cur_node.Content())
					}
					continue
				}

				err = p.unmarshalPath(tinfo, sv, nil, cur_node)
				if err != nil {
					return err
				}
			}
		}

	} // switch v := val; v.Kind() {

	return nil
}