/
metadata_marshaller.go
95 lines (82 loc) · 1.9 KB
/
metadata_marshaller.go
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package eureka
import (
"encoding/xml"
"encoding/json"
"regexp"
)
type MetaData struct {
Map map[string]string
Class string
}
type Vraw struct {
Content []byte `xml:",innerxml"`
Class string `xml:"class,attr" json:"@class"`
}
func (s *MetaData) MarshalXML(e *xml.Encoder, start xml.StartElement) error {
var attributes []xml.Attr = make([]xml.Attr, 0)
if s.Class != "" {
attributes = append(attributes, xml.Attr{
Name: xml.Name{
Local: "class",
},
Value: s.Class,
})
}
start.Attr = attributes
tokens := []xml.Token{start}
for key, value := range s.Map {
t := xml.StartElement{Name: xml.Name{"", key}}
tokens = append(tokens, t, xml.CharData(value), xml.EndElement{t.Name})
}
tokens = append(tokens, xml.EndElement{
Name: start.Name,
})
for _, t := range tokens {
err := e.EncodeToken(t)
if err != nil {
return err
}
}
// flush to ensure tokens are written
err := e.Flush()
if err != nil {
return err
}
return nil
}
func (s *MetaData) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
s.Map = make(map[string]string)
vraw := &Vraw{}
d.DecodeElement(vraw, &start)
dataInString := string(vraw.Content)
regex, err := regexp.Compile("\\s*<([^<>]+)>([^<>]+)</[^<>]+>\\s*")
if err != nil {
return err
}
subMatches := regex.FindAllStringSubmatch(dataInString, -1)
for _, subMatch := range subMatches {
s.Map[subMatch[1]] = subMatch[2]
}
s.Class = vraw.Class
return nil
}
func (s *MetaData) MarshalJSON() ([]byte, error) {
mapIt := make(map[string]string)
for key, value := range s.Map {
mapIt[key] = value
}
if s.Class != "" {
mapIt["@class"] = s.Class
}
return json.Marshal(mapIt)
}
func (s *MetaData) UnmarshalJSON(data []byte) error {
dataUnmarshal := make(map[string]string)
err := json.Unmarshal(data, dataUnmarshal)
s.Map = dataUnmarshal
if val, ok := s.Map["@class"]; ok {
s.Class = val
delete(s.Map, "@class")
}
return err
}