blob: abee5f30e9fd0ea18daed09e3030aa53f4608f03 (
plain)
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
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
|
// Copyright 2018 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package impl
import (
"fmt"
"reflect"
"strconv"
"google.golang.org/protobuf/encoding/prototext"
"google.golang.org/protobuf/internal/errors"
"google.golang.org/protobuf/proto"
pref "google.golang.org/protobuf/reflect/protoreflect"
piface "google.golang.org/protobuf/runtime/protoiface"
)
// Export is a zero-length named type that exists only to export a set of
// functions that we do not want to appear in godoc.
type Export struct{}
// NewError formats a string according to the format specifier and arguments and
// returns an error that has a "proto" prefix.
func (Export) NewError(f string, x ...interface{}) error {
return errors.New(f, x...)
}
// enum is any enum type generated by protoc-gen-go
// and must be a named int32 type.
type enum = interface{}
// EnumOf returns the protoreflect.Enum interface over e.
// It returns nil if e is nil.
func (Export) EnumOf(e enum) pref.Enum {
switch e := e.(type) {
case nil:
return nil
case pref.Enum:
return e
default:
return legacyWrapEnum(reflect.ValueOf(e))
}
}
// EnumDescriptorOf returns the protoreflect.EnumDescriptor for e.
// It returns nil if e is nil.
func (Export) EnumDescriptorOf(e enum) pref.EnumDescriptor {
switch e := e.(type) {
case nil:
return nil
case pref.Enum:
return e.Descriptor()
default:
return LegacyLoadEnumDesc(reflect.TypeOf(e))
}
}
// EnumTypeOf returns the protoreflect.EnumType for e.
// It returns nil if e is nil.
func (Export) EnumTypeOf(e enum) pref.EnumType {
switch e := e.(type) {
case nil:
return nil
case pref.Enum:
return e.Type()
default:
return legacyLoadEnumType(reflect.TypeOf(e))
}
}
// EnumStringOf returns the enum value as a string, either as the name if
// the number is resolvable, or the number formatted as a string.
func (Export) EnumStringOf(ed pref.EnumDescriptor, n pref.EnumNumber) string {
ev := ed.Values().ByNumber(n)
if ev != nil {
return string(ev.Name())
}
return strconv.Itoa(int(n))
}
// message is any message type generated by protoc-gen-go
// and must be a pointer to a named struct type.
type message = interface{}
// legacyMessageWrapper wraps a v2 message as a v1 message.
type legacyMessageWrapper struct{ m pref.ProtoMessage }
func (m legacyMessageWrapper) Reset() { proto.Reset(m.m) }
func (m legacyMessageWrapper) String() string { return Export{}.MessageStringOf(m.m) }
func (m legacyMessageWrapper) ProtoMessage() {}
// ProtoMessageV1Of converts either a v1 or v2 message to a v1 message.
// It returns nil if m is nil.
func (Export) ProtoMessageV1Of(m message) piface.MessageV1 {
switch mv := m.(type) {
case nil:
return nil
case piface.MessageV1:
return mv
case unwrapper:
return Export{}.ProtoMessageV1Of(mv.protoUnwrap())
case pref.ProtoMessage:
return legacyMessageWrapper{mv}
default:
panic(fmt.Sprintf("message %T is neither a v1 or v2 Message", m))
}
}
func (Export) protoMessageV2Of(m message) pref.ProtoMessage {
switch mv := m.(type) {
case nil:
return nil
case pref.ProtoMessage:
return mv
case legacyMessageWrapper:
return mv.m
case piface.MessageV1:
return nil
default:
panic(fmt.Sprintf("message %T is neither a v1 or v2 Message", m))
}
}
// ProtoMessageV2Of converts either a v1 or v2 message to a v2 message.
// It returns nil if m is nil.
func (Export) ProtoMessageV2Of(m message) pref.ProtoMessage {
if m == nil {
return nil
}
if mv := (Export{}).protoMessageV2Of(m); mv != nil {
return mv
}
return legacyWrapMessage(reflect.ValueOf(m)).Interface()
}
// MessageOf returns the protoreflect.Message interface over m.
// It returns nil if m is nil.
func (Export) MessageOf(m message) pref.Message {
if m == nil {
return nil
}
if mv := (Export{}).protoMessageV2Of(m); mv != nil {
return mv.ProtoReflect()
}
return legacyWrapMessage(reflect.ValueOf(m))
}
// MessageDescriptorOf returns the protoreflect.MessageDescriptor for m.
// It returns nil if m is nil.
func (Export) MessageDescriptorOf(m message) pref.MessageDescriptor {
if m == nil {
return nil
}
if mv := (Export{}).protoMessageV2Of(m); mv != nil {
return mv.ProtoReflect().Descriptor()
}
return LegacyLoadMessageDesc(reflect.TypeOf(m))
}
// MessageTypeOf returns the protoreflect.MessageType for m.
// It returns nil if m is nil.
func (Export) MessageTypeOf(m message) pref.MessageType {
if m == nil {
return nil
}
if mv := (Export{}).protoMessageV2Of(m); mv != nil {
return mv.ProtoReflect().Type()
}
return legacyLoadMessageType(reflect.TypeOf(m), "")
}
// MessageStringOf returns the message value as a string,
// which is the message serialized in the protobuf text format.
func (Export) MessageStringOf(m pref.ProtoMessage) string {
return prototext.MarshalOptions{Multiline: false}.Format(m)
}
|
