/
set.go
114 lines (89 loc) · 2.54 KB
/
set.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
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
package ijson
// Set sets the provide value to the path. It creates the structure if not present.
// An error is returned if it fails to resolve the path OR encounters different type than expected by path.
func Set(data, value interface{}, path ...string) (interface{}, error) {
return set(data, value, false, path...)
}
// SetP is same as Set(). It just takes `"."` separated path.
func SetP(data, value interface{}, path string) (interface{}, error) {
return setP(data, value, false, path)
}
// SetF is same as Set(). It just forcefully replaces the structure if it is not same as expected by the path.
func SetF(data, value interface{}, path ...string) (interface{}, error) {
return set(data, value, true, path...)
}
// SetFP is same as SetF(). It just takes `"."` separated path.
func SetFP(data, value interface{}, path string) (interface{}, error) {
return setP(data, value, true, path)
}
func set(data interface{}, value interface{}, force bool, path ...string) (interface{}, error) {
if len(path) == 0 {
if data == nil {
return value, nil
}
return data, nil
}
pathType := DetectSetPath(path[0])
switch pathType {
case PSet_Obj:
object, valid := data.(map[string]interface{})
if !valid {
if data == nil || force {
object = make(map[string]interface{}, 1)
} else {
return nil, errExpObj
}
// object = make(map[string]interface{})
}
newData, err := set(object[path[0]], value, force, path[1:]...)
if err != nil {
return nil, err
}
object[path[0]] = newData
return object, nil
case PSet_ArrIdx:
idx, err := index(path[0], PSet_ArrIdx)
if err != nil {
return nil, err
}
array, valid := data.([]interface{})
if !valid {
if data == nil || force {
array = make([]interface{}, idx+1)
} else {
return nil, errExpArr
}
} else {
array = extend(array, idx)
}
newData, err := set(array[idx], value, force, path[1:]...)
if err != nil {
return nil, err
}
array[idx] = newData
return array, nil
case PSet_ArrAppend:
array, valid := data.([]interface{})
if !valid {
if data == nil || force {
array = make([]interface{}, 0, 1)
} else {
return nil, errExpArr
}
}
array = append(array, value)
return array, nil
default:
return nil, errInvPth
}
}
func setP(data interface{}, value interface{}, force bool, path string) (interface{}, error) {
return set(data, value, force, split(path)...)
}
func extend(arr []interface{}, idx int) []interface{} {
max := len(arr) - 1
if idx > max {
arr = append(arr, make([]interface{}, idx-max)...)
}
return arr
}