-
Notifications
You must be signed in to change notification settings - Fork 49
/
toInterfaceValue.go
71 lines (67 loc) · 1.74 KB
/
toInterfaceValue.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
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
package fluent
import (
"errors"
"github.com/ipld/go-ipld-prime/datamodel"
)
var errInvalidKind = errors.New("invalid kind")
var errUnknownKind = errors.New("unknown kind")
// ToInterface converts an IPLD node to its simplest equivalent Go value.
//
// Booleans, integers, floats, strings, bytes, and links are returned as themselves,
// as per the node's AsT method. Note that nulls are returned as untyped nils.
//
// Lists and maps are returned as []interface{} and map[string]interface{}, respectively.
func ToInterface(node datamodel.Node) (interface{}, error) {
switch k := node.Kind(); k {
case datamodel.Kind_Invalid:
return nil, errInvalidKind
case datamodel.Kind_Null:
return nil, nil
case datamodel.Kind_Bool:
return node.AsBool()
case datamodel.Kind_Int:
return node.AsInt()
case datamodel.Kind_Float:
return node.AsFloat()
case datamodel.Kind_String:
return node.AsString()
case datamodel.Kind_Bytes:
return node.AsBytes()
case datamodel.Kind_Link:
return node.AsLink()
case datamodel.Kind_Map:
outMap := make(map[string]interface{}, node.Length())
for mi := node.MapIterator(); !mi.Done(); {
k, v, err := mi.Next()
if err != nil {
return nil, err
}
kVal, err := k.AsString()
if err != nil {
return nil, err
}
vVal, err := ToInterface(v)
if err != nil {
return nil, err
}
outMap[kVal] = vVal
}
return outMap, nil
case datamodel.Kind_List:
outList := make([]interface{}, 0, node.Length())
for li := node.ListIterator(); !li.Done(); {
_, v, err := li.Next()
if err != nil {
return nil, err
}
vVal, err := ToInterface(v)
if err != nil {
return nil, err
}
outList = append(outList, vVal)
}
return outList, nil
default:
return nil, errUnknownKind
}
}