forked from cloudfoundry/bbs
/
json.go
54 lines (42 loc) · 886 Bytes
/
json.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
package models
import (
"encoding/json"
"reflect"
)
func FromJSON(payload []byte, v Validator) error {
err := json.Unmarshal(payload, v)
if err != nil {
return err
}
return v.Validate()
}
func ToJSON(v Validator) ([]byte, error) {
if isNil(v) {
return json.Marshal(v)
}
if err := v.Validate(); err != nil {
return []byte{}, err
}
return json.Marshal(v)
}
func ToJSONArray(vs ...Validator) ([]byte, error) {
msgs := make([]*json.RawMessage, len(vs))
for i, v := range vs {
msg, err := ToJSON(v)
if err != nil {
return nil, err
}
msgs[i] = (*json.RawMessage)(&msg)
}
return json.Marshal(msgs)
}
func isNil(a interface{}) bool {
if a == nil {
return true
}
switch reflect.TypeOf(a).Kind() {
case reflect.Chan, reflect.Func, reflect.Interface, reflect.Map, reflect.Ptr, reflect.Slice:
return reflect.ValueOf(a).IsNil()
}
return false
}