forked from tw-bc-group/fabric
-
Notifications
You must be signed in to change notification settings - Fork 0
/
dynamic.go
149 lines (126 loc) · 4.95 KB
/
dynamic.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
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
/*
Copyright IBM Corp. 2017 All Rights Reserved.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package protolator
import (
"reflect"
"github.com/golang/protobuf/proto"
)
func dynamicFrom(dynamicMsg func(underlying proto.Message) (proto.Message, error), value interface{}, destType reflect.Type) (reflect.Value, error) {
tree := value.(map[string]interface{}) // Safe, already checked
uMsg := reflect.New(destType.Elem())
nMsg, err := dynamicMsg(uMsg.Interface().(proto.Message)) // Safe, already checked
if err != nil {
return reflect.Value{}, err
}
if err := recursivelyPopulateMessageFromTree(tree, nMsg); err != nil {
return reflect.Value{}, err
}
return uMsg, nil
}
func dynamicTo(dynamicMsg func(underlying proto.Message) (proto.Message, error), value reflect.Value) (interface{}, error) {
nMsg, err := dynamicMsg(value.Interface().(proto.Message)) // Safe, already checked
if err != nil {
return nil, err
}
return recursivelyCreateTreeFromMessage(nMsg)
}
type dynamicFieldFactory struct{}
func (dff dynamicFieldFactory) Handles(msg proto.Message, fieldName string, fieldType reflect.Type, fieldValue reflect.Value) bool {
dynamicProto, ok := msg.(DynamicFieldProto)
if !ok {
return false
}
return stringInSlice(fieldName, dynamicProto.DynamicFields())
}
func (dff dynamicFieldFactory) NewProtoField(msg proto.Message, fieldName string, fieldType reflect.Type, fieldValue reflect.Value) (protoField, error) {
dynamicProto, _ := msg.(DynamicFieldProto) // Type checked in Handles
return &plainField{
baseField: baseField{
msg: msg,
name: fieldName,
fType: mapStringInterfaceType,
vType: fieldType,
value: fieldValue,
},
populateFrom: func(v interface{}, dT reflect.Type) (reflect.Value, error) {
return dynamicFrom(func(underlying proto.Message) (proto.Message, error) {
return dynamicProto.DynamicFieldProto(fieldName, underlying)
}, v, dT)
},
populateTo: func(v reflect.Value) (interface{}, error) {
return dynamicTo(func(underlying proto.Message) (proto.Message, error) {
return dynamicProto.DynamicFieldProto(fieldName, underlying)
}, v)
},
}, nil
}
type dynamicMapFieldFactory struct{}
func (dmff dynamicMapFieldFactory) Handles(msg proto.Message, fieldName string, fieldType reflect.Type, fieldValue reflect.Value) bool {
dynamicProto, ok := msg.(DynamicMapFieldProto)
if !ok {
return false
}
return stringInSlice(fieldName, dynamicProto.DynamicMapFields())
}
func (dmff dynamicMapFieldFactory) NewProtoField(msg proto.Message, fieldName string, fieldType reflect.Type, fieldValue reflect.Value) (protoField, error) {
dynamicProto := msg.(DynamicMapFieldProto) // Type checked by Handles
return &mapField{
baseField: baseField{
msg: msg,
name: fieldName,
fType: mapStringInterfaceType,
vType: fieldType,
value: fieldValue,
},
populateFrom: func(k string, v interface{}, dT reflect.Type) (reflect.Value, error) {
return dynamicFrom(func(underlying proto.Message) (proto.Message, error) {
return dynamicProto.DynamicMapFieldProto(fieldName, k, underlying)
}, v, dT)
},
populateTo: func(k string, v reflect.Value) (interface{}, error) {
return dynamicTo(func(underlying proto.Message) (proto.Message, error) {
return dynamicProto.DynamicMapFieldProto(fieldName, k, underlying)
}, v)
},
}, nil
}
type dynamicSliceFieldFactory struct{}
func (dmff dynamicSliceFieldFactory) Handles(msg proto.Message, fieldName string, fieldType reflect.Type, fieldValue reflect.Value) bool {
dynamicProto, ok := msg.(DynamicSliceFieldProto)
if !ok {
return false
}
return stringInSlice(fieldName, dynamicProto.DynamicSliceFields())
}
func (dmff dynamicSliceFieldFactory) NewProtoField(msg proto.Message, fieldName string, fieldType reflect.Type, fieldValue reflect.Value) (protoField, error) {
dynamicProto := msg.(DynamicSliceFieldProto) // Type checked by Handles
return &sliceField{
baseField: baseField{
msg: msg,
name: fieldName,
fType: mapStringInterfaceType,
vType: fieldType,
value: fieldValue,
},
populateFrom: func(i int, v interface{}, dT reflect.Type) (reflect.Value, error) {
return dynamicFrom(func(underlying proto.Message) (proto.Message, error) {
return dynamicProto.DynamicSliceFieldProto(fieldName, i, underlying)
}, v, dT)
},
populateTo: func(i int, v reflect.Value) (interface{}, error) {
return dynamicTo(func(underlying proto.Message) (proto.Message, error) {
return dynamicProto.DynamicSliceFieldProto(fieldName, i, underlying)
}, v)
},
}, nil
}