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annotation.go
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annotation.go
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package annotation
import (
"fmt"
"github.com/mitchellh/mapstructure"
"strconv"
"strings"
)
type Annotation struct {
Name string
Value string
Map map[string]interface{}
}
func NewAnnotation(name string, value string) Annotation {
mp := asMap(value)
v := valueMap(mp)
return Annotation{Name: name, Map: mp, Value: v}
}
func (m *Annotation) RawValue() string {
return m.Value
}
func (m *Annotation) Decode(a interface{}) error {
config := &mapstructure.DecoderConfig{
TagName: "attr",
Result: &a,
}
decoder, err := mapstructure.NewDecoder(config)
if err != nil {
return err
}
return decoder.Decode(m.Map)
}
func valueMap(mp map[string]interface{}) string {
var entries []string
for k, v := range mp {
entries = append(entries, strings.Join([]string{k, fmt.Sprintf("%v", v)}, "="))
}
return strings.Join(entries, ",")
}
func asMap(value string) map[string]interface{} {
entries := strings.Split(value, ",")
mp := make(map[string]interface{})
for _, entry := range entries {
entry = strings.TrimSpace(entry)
e := strings.Split(entry, "=")
if len(e) == 2 {
mp[strings.ReplaceAll(strings.TrimSpace(e[0]), " ", "")] = determineType(strings.TrimSpace(e[1]))
}
}
return mp
}
func determineType(value string) interface{} {
if intValue, err := strconv.Atoi(value); err == nil {
return intValue
}
if floatValue, err := strconv.ParseFloat(value, 64); err == nil {
return floatValue
}
if boolValue, err := strconv.ParseBool(value); err == nil {
return boolValue
}
return value
}