/
message.go
846 lines (769 loc) · 28.5 KB
/
message.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
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
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
package builder
import (
"fmt"
"sort"
"google.golang.org/protobuf/proto"
"google.golang.org/protobuf/types/descriptorpb"
"github.com/jhump/protoreflect/desc"
"github.com/jhump/protoreflect/desc/internal"
)
// MessageBuilder is a builder used to construct a desc.MessageDescriptor. A
// message builder can define nested messages, enums, and extensions in addition
// to defining the message's fields.
//
// Note that when building a descriptor from a MessageBuilder, not all protobuf
// validation rules are enforced. See the package documentation for more info.
//
// To create a new MessageBuilder, use NewMessage.
type MessageBuilder struct {
baseBuilder
Options *descriptorpb.MessageOptions
ExtensionRanges []*descriptorpb.DescriptorProto_ExtensionRange
ReservedRanges []*descriptorpb.DescriptorProto_ReservedRange
ReservedNames []string
fieldsAndOneOfs []Builder
fieldTags map[int32]*FieldBuilder
nestedMessages []*MessageBuilder
nestedExtensions []*FieldBuilder
nestedEnums []*EnumBuilder
symbols map[string]Builder
}
// NewMessage creates a new MessageBuilder for a message with the given name.
// Since the new message has no parent element, it also has no package name
// (e.g. it is in the unnamed package, until it is assigned to a file builder
// that defines a package name).
func NewMessage(name string) *MessageBuilder {
return &MessageBuilder{
baseBuilder: baseBuilderWithName(name),
fieldTags: map[int32]*FieldBuilder{},
symbols: map[string]Builder{},
}
}
// FromMessage returns a MessageBuilder that is effectively a copy of the given
// descriptor.
//
// Note that it is not just the given message that is copied but its entire
// file. So the caller can get the parent element of the returned builder and
// the result would be a builder that is effectively a copy of the message
// descriptor's parent.
//
// This means that message builders created from descriptors do not need to be
// explicitly assigned to a file in order to preserve the original message's
// package name.
func FromMessage(md *desc.MessageDescriptor) (*MessageBuilder, error) {
if fb, err := FromFile(md.GetFile()); err != nil {
return nil, err
} else if mb, ok := fb.findFullyQualifiedElement(md.GetFullyQualifiedName()).(*MessageBuilder); ok {
return mb, nil
} else {
return nil, fmt.Errorf("could not find message %s after converting file %q to builder", md.GetFullyQualifiedName(), md.GetFile().GetName())
}
}
func fromMessage(md *desc.MessageDescriptor,
localMessages map[*desc.MessageDescriptor]*MessageBuilder,
localEnums map[*desc.EnumDescriptor]*EnumBuilder) (*MessageBuilder, error) {
mb := NewMessage(md.GetName())
mb.Options = md.GetMessageOptions()
mb.ExtensionRanges = md.AsDescriptorProto().GetExtensionRange()
mb.ReservedRanges = md.AsDescriptorProto().GetReservedRange()
mb.ReservedNames = md.AsDescriptorProto().GetReservedName()
setComments(&mb.comments, md.GetSourceInfo())
localMessages[md] = mb
oneOfs := make([]*OneOfBuilder, len(md.GetOneOfs()))
for i, ood := range md.GetOneOfs() {
if ood.IsSynthetic() {
continue
}
if oob, err := fromOneOf(ood); err != nil {
return nil, err
} else {
oneOfs[i] = oob
}
}
for _, fld := range md.GetFields() {
if fld.GetOneOf() != nil && !fld.GetOneOf().IsSynthetic() {
// add one-ofs in the order of their first constituent field
oob := oneOfs[fld.AsFieldDescriptorProto().GetOneofIndex()]
if oob != nil {
oneOfs[fld.AsFieldDescriptorProto().GetOneofIndex()] = nil
if err := mb.TryAddOneOf(oob); err != nil {
return nil, err
}
}
continue
}
if flb, err := fromField(fld); err != nil {
return nil, err
} else if err := mb.TryAddField(flb); err != nil {
return nil, err
}
}
for _, nmd := range md.GetNestedMessageTypes() {
if nmb, err := fromMessage(nmd, localMessages, localEnums); err != nil {
return nil, err
} else if err := mb.TryAddNestedMessage(nmb); err != nil {
return nil, err
}
}
for _, ed := range md.GetNestedEnumTypes() {
if eb, err := fromEnum(ed, localEnums); err != nil {
return nil, err
} else if err := mb.TryAddNestedEnum(eb); err != nil {
return nil, err
}
}
for _, exd := range md.GetNestedExtensions() {
if exb, err := fromField(exd); err != nil {
return nil, err
} else if err := mb.TryAddNestedExtension(exb); err != nil {
return nil, err
}
}
return mb, nil
}
// SetName changes this message's name, returning the message builder for method
// chaining. If the given new name is not valid (e.g. TrySetName would have
// returned an error) then this method will panic.
func (mb *MessageBuilder) SetName(newName string) *MessageBuilder {
if err := mb.TrySetName(newName); err != nil {
panic(err)
}
return mb
}
// TrySetName changes this message's name. It will return an error if the given
// new name is not a valid protobuf identifier or if the parent builder already
// has an element with the given name.
//
// If the message is a map or group type whose parent is the corresponding map
// or group field, the parent field's enclosing message is checked for elements
// with a conflicting name. Despite the fact that these message types are
// modeled as children of their associated field builder, in the protobuf IDL
// they are actually all defined in the enclosing message's namespace.
func (mb *MessageBuilder) TrySetName(newName string) error {
if p, ok := mb.parent.(*FieldBuilder); ok && p.fieldType.fieldType != descriptorpb.FieldDescriptorProto_TYPE_GROUP {
return fmt.Errorf("cannot change name of map entry %s; change name of field instead", GetFullyQualifiedName(mb))
}
return mb.trySetNameInternal(newName)
}
func (mb *MessageBuilder) trySetNameInternal(newName string) error {
return mb.baseBuilder.setName(mb, newName)
}
func (mb *MessageBuilder) setNameInternal(newName string) {
if err := mb.trySetNameInternal(newName); err != nil {
panic(err)
}
}
// SetComments sets the comments associated with the message. This method
// returns the message builder, for method chaining.
func (mb *MessageBuilder) SetComments(c Comments) *MessageBuilder {
mb.comments = c
return mb
}
// GetChildren returns any builders assigned to this message builder. These will
// include the message's fields and one-ofs as well as any nested messages,
// extensions, and enums.
func (mb *MessageBuilder) GetChildren() []Builder {
ch := append([]Builder(nil), mb.fieldsAndOneOfs...)
for _, nmb := range mb.nestedMessages {
ch = append(ch, nmb)
}
for _, exb := range mb.nestedExtensions {
ch = append(ch, exb)
}
for _, eb := range mb.nestedEnums {
ch = append(ch, eb)
}
return ch
}
func (mb *MessageBuilder) findChild(name string) Builder {
return mb.symbols[name]
}
func (mb *MessageBuilder) removeChild(b Builder) {
if p, ok := b.GetParent().(*MessageBuilder); !ok || p != mb {
return
}
switch b := b.(type) {
case *FieldBuilder:
if b.IsExtension() {
mb.nestedExtensions = deleteBuilder(b.GetName(), mb.nestedExtensions).([]*FieldBuilder)
} else {
mb.fieldsAndOneOfs = deleteBuilder(b.GetName(), mb.fieldsAndOneOfs).([]Builder)
delete(mb.fieldTags, b.GetNumber())
if b.msgType != nil {
delete(mb.symbols, b.msgType.GetName())
}
}
case *OneOfBuilder:
mb.fieldsAndOneOfs = deleteBuilder(b.GetName(), mb.fieldsAndOneOfs).([]Builder)
for _, flb := range b.choices {
delete(mb.symbols, flb.GetName())
delete(mb.fieldTags, flb.GetNumber())
}
case *MessageBuilder:
mb.nestedMessages = deleteBuilder(b.GetName(), mb.nestedMessages).([]*MessageBuilder)
case *EnumBuilder:
mb.nestedEnums = deleteBuilder(b.GetName(), mb.nestedEnums).([]*EnumBuilder)
}
delete(mb.symbols, b.GetName())
b.setParent(nil)
}
func (mb *MessageBuilder) renamedChild(b Builder, oldName string) error {
if p, ok := b.GetParent().(*MessageBuilder); !ok || p != mb {
return nil
}
if err := mb.addSymbol(b); err != nil {
return err
}
delete(mb.symbols, oldName)
return nil
}
func (mb *MessageBuilder) addSymbol(b Builder) error {
if ex, ok := mb.symbols[b.GetName()]; ok {
return fmt.Errorf("message %s already contains element (%T) named %q", GetFullyQualifiedName(mb), ex, b.GetName())
}
mb.symbols[b.GetName()] = b
return nil
}
func (mb *MessageBuilder) addTag(flb *FieldBuilder) error {
if flb.number == 0 {
return nil
}
if ex, ok := mb.fieldTags[flb.GetNumber()]; ok {
return fmt.Errorf("message %s already contains field with tag %d: %s", GetFullyQualifiedName(mb), flb.GetNumber(), ex.GetName())
}
mb.fieldTags[flb.GetNumber()] = flb
return nil
}
func (mb *MessageBuilder) registerField(flb *FieldBuilder) error {
if err := mb.addSymbol(flb); err != nil {
return err
}
if err := mb.addTag(flb); err != nil {
delete(mb.symbols, flb.GetName())
return err
}
if flb.msgType != nil {
if err := mb.addSymbol(flb.msgType); err != nil {
delete(mb.symbols, flb.GetName())
delete(mb.fieldTags, flb.GetNumber())
return err
}
}
return nil
}
// GetField returns the field with the given name. If no such field exists in
// the message, nil is returned. The field does not have to be an immediate
// child of this message but could instead be an indirect child via a one-of.
func (mb *MessageBuilder) GetField(name string) *FieldBuilder {
b := mb.symbols[name]
if flb, ok := b.(*FieldBuilder); ok && !flb.IsExtension() {
return flb
} else {
return nil
}
}
// RemoveField removes the field with the given name. If no such field exists in
// the message, this is a no-op. If the field is part of a one-of, the one-of
// remains assigned to this message and the field is removed from it. This
// returns the message builder, for method chaining.
func (mb *MessageBuilder) RemoveField(name string) *MessageBuilder {
mb.TryRemoveField(name)
return mb
}
// TryRemoveField removes the field with the given name and returns false if the
// message has no such field. If the field is part of a one-of, the one-of
// remains assigned to this message and the field is removed from it.
func (mb *MessageBuilder) TryRemoveField(name string) bool {
b := mb.symbols[name]
if flb, ok := b.(*FieldBuilder); ok && !flb.IsExtension() {
// parent could be mb, but could also be a one-of
flb.GetParent().removeChild(flb)
return true
}
return false
}
// AddField adds the given field to this message. If an error prevents the field
// from being added, this method panics. If the given field is an extension,
// this method panics. This returns the message builder, for method chaining.
func (mb *MessageBuilder) AddField(flb *FieldBuilder) *MessageBuilder {
if err := mb.TryAddField(flb); err != nil {
panic(err)
}
return mb
}
// TryAddField adds the given field to this message, returning any error that
// prevents the field from being added (such as a name collision with another
// element already added to the message). An error is returned if the given
// field is an extension field.
func (mb *MessageBuilder) TryAddField(flb *FieldBuilder) error {
if flb.IsExtension() {
return fmt.Errorf("field %s is an extension, not a regular field", flb.GetName())
}
// If we are moving field from a one-of that belongs to this message
// directly to this message, we have to use different order of operations
// to prevent failure (otherwise, it looks like it's being added twice).
// (We do similar if moving the other direction, from message to a one-of
// that is already assigned to same message.)
needToUnlinkFirst := mb.isPresentButNotChild(flb)
if needToUnlinkFirst {
Unlink(flb)
mb.registerField(flb)
} else {
if err := mb.registerField(flb); err != nil {
return err
}
Unlink(flb)
}
flb.setParent(mb)
mb.fieldsAndOneOfs = append(mb.fieldsAndOneOfs, flb)
return nil
}
// GetOneOf returns the one-of with the given name. If no such one-of exists in
// the message, nil is returned.
func (mb *MessageBuilder) GetOneOf(name string) *OneOfBuilder {
b := mb.symbols[name]
if oob, ok := b.(*OneOfBuilder); ok {
return oob
} else {
return nil
}
}
// RemoveOneOf removes the one-of with the given name. If no such one-of exists
// in the message, this is a no-op. This returns the message builder, for method
// chaining.
func (mb *MessageBuilder) RemoveOneOf(name string) *MessageBuilder {
mb.TryRemoveOneOf(name)
return mb
}
// TryRemoveOneOf removes the one-of with the given name and returns false if
// the message has no such one-of.
func (mb *MessageBuilder) TryRemoveOneOf(name string) bool {
b := mb.symbols[name]
if oob, ok := b.(*OneOfBuilder); ok {
mb.removeChild(oob)
return true
}
return false
}
// AddOneOf adds the given one-of to this message. If an error prevents the
// one-of from being added, this method panics. This returns the message
// builder, for method chaining.
func (mb *MessageBuilder) AddOneOf(oob *OneOfBuilder) *MessageBuilder {
if err := mb.TryAddOneOf(oob); err != nil {
panic(err)
}
return mb
}
// TryAddOneOf adds the given one-of to this message, returning any error that
// prevents the one-of from being added (such as a name collision with another
// element already added to the message).
func (mb *MessageBuilder) TryAddOneOf(oob *OneOfBuilder) error {
if err := mb.addSymbol(oob); err != nil {
return err
}
// add nested fields to symbol and tag map
for i, flb := range oob.choices {
if err := mb.registerField(flb); err != nil {
// must undo all additions we've made so far
delete(mb.symbols, oob.GetName())
for i > 1 {
i--
flb := oob.choices[i]
delete(mb.symbols, flb.GetName())
delete(mb.fieldTags, flb.GetNumber())
}
return err
}
}
Unlink(oob)
oob.setParent(mb)
mb.fieldsAndOneOfs = append(mb.fieldsAndOneOfs, oob)
return nil
}
// GetNestedMessage returns the nested message with the given name. If no such
// message exists, nil is returned. The named message must be in this message's
// scope. If the message is nested more deeply, this will return nil. This means
// the message must be a direct child of this message or a child of one of this
// message's fields (e.g. the group type for a group field or a map entry for a
// map field).
func (mb *MessageBuilder) GetNestedMessage(name string) *MessageBuilder {
b := mb.symbols[name]
if nmb, ok := b.(*MessageBuilder); ok {
return nmb
} else {
return nil
}
}
// RemoveNestedMessage removes the nested message with the given name. If no
// such message exists, this is a no-op. This returns the message builder, for
// method chaining.
func (mb *MessageBuilder) RemoveNestedMessage(name string) *MessageBuilder {
mb.TryRemoveNestedMessage(name)
return mb
}
// TryRemoveNestedMessage removes the nested message with the given name and
// returns false if this message has no nested message with that name. If the
// named message is a child of a field (e.g. the group type for a group field or
// the map entry for a map field), it is removed from that field and thus
// removed from this message's scope.
func (mb *MessageBuilder) TryRemoveNestedMessage(name string) bool {
b := mb.symbols[name]
if nmb, ok := b.(*MessageBuilder); ok {
// parent could be mb, but could also be a field (if the message
// is the field's group or map entry type)
nmb.GetParent().removeChild(nmb)
return true
}
return false
}
// AddNestedMessage adds the given message as a nested child of this message. If
// an error prevents the message from being added, this method panics. This
// returns the message builder, for method chaining.
func (mb *MessageBuilder) AddNestedMessage(nmb *MessageBuilder) *MessageBuilder {
if err := mb.TryAddNestedMessage(nmb); err != nil {
panic(err)
}
return mb
}
// TryAddNestedMessage adds the given message as a nested child of this message,
// returning any error that prevents the message from being added (such as a
// name collision with another element already added to the message).
func (mb *MessageBuilder) TryAddNestedMessage(nmb *MessageBuilder) error {
// If we are moving nested message from field (map entry or group type)
// directly to this message, we have to use different order of operations
// to prevent failure (otherwise, it looks like it's being added twice).
// (We don't need to do similar for the other direction, because that isn't
// possible: you can't add messages to a field, they can only be constructed
// that way using NewGroupField or NewMapField.)
needToUnlinkFirst := mb.isPresentButNotChild(nmb)
if needToUnlinkFirst {
Unlink(nmb)
_ = mb.addSymbol(nmb)
} else {
if err := mb.addSymbol(nmb); err != nil {
return err
}
Unlink(nmb)
}
nmb.setParent(mb)
mb.nestedMessages = append(mb.nestedMessages, nmb)
return nil
}
func (mb *MessageBuilder) isPresentButNotChild(b Builder) bool {
if p, ok := b.GetParent().(*MessageBuilder); ok && p == mb {
// it's a child
return false
}
return mb.symbols[b.GetName()] == b
}
// GetNestedExtension returns the nested extension with the given name. If no
// such extension exists, nil is returned. The named extension must be in this
// message's scope. If the extension is nested more deeply, this will return
// nil. This means the extension must be a direct child of this message.
func (mb *MessageBuilder) GetNestedExtension(name string) *FieldBuilder {
b := mb.symbols[name]
if exb, ok := b.(*FieldBuilder); ok && exb.IsExtension() {
return exb
} else {
return nil
}
}
// RemoveNestedExtension removes the nested extension with the given name. If no
// such extension exists, this is a no-op. This returns the message builder, for
// method chaining.
func (mb *MessageBuilder) RemoveNestedExtension(name string) *MessageBuilder {
mb.TryRemoveNestedExtension(name)
return mb
}
// TryRemoveNestedExtension removes the nested extension with the given name and
// returns false if this message has no nested extension with that name.
func (mb *MessageBuilder) TryRemoveNestedExtension(name string) bool {
b := mb.symbols[name]
if exb, ok := b.(*FieldBuilder); ok && exb.IsExtension() {
mb.removeChild(exb)
return true
}
return false
}
// AddNestedExtension adds the given extension as a nested child of this
// message. If an error prevents the extension from being added, this method
// panics. This returns the message builder, for method chaining.
func (mb *MessageBuilder) AddNestedExtension(exb *FieldBuilder) *MessageBuilder {
if err := mb.TryAddNestedExtension(exb); err != nil {
panic(err)
}
return mb
}
// TryAddNestedExtension adds the given extension as a nested child of this
// message, returning any error that prevents the extension from being added
// (such as a name collision with another element already added to the message).
func (mb *MessageBuilder) TryAddNestedExtension(exb *FieldBuilder) error {
if !exb.IsExtension() {
return fmt.Errorf("field %s is not an extension", exb.GetName())
}
if err := mb.addSymbol(exb); err != nil {
return err
}
Unlink(exb)
exb.setParent(mb)
mb.nestedExtensions = append(mb.nestedExtensions, exb)
return nil
}
// GetNestedEnum returns the nested enum with the given name. If no such enum
// exists, nil is returned. The named enum must be in this message's scope. If
// the enum is nested more deeply, this will return nil. This means the enum
// must be a direct child of this message.
func (mb *MessageBuilder) GetNestedEnum(name string) *EnumBuilder {
b := mb.symbols[name]
if eb, ok := b.(*EnumBuilder); ok {
return eb
} else {
return nil
}
}
// RemoveNestedEnum removes the nested enum with the given name. If no such enum
// exists, this is a no-op. This returns the message builder, for method
// chaining.
func (mb *MessageBuilder) RemoveNestedEnum(name string) *MessageBuilder {
mb.TryRemoveNestedEnum(name)
return mb
}
// TryRemoveNestedEnum removes the nested enum with the given name and returns
// false if this message has no nested enum with that name.
func (mb *MessageBuilder) TryRemoveNestedEnum(name string) bool {
b := mb.symbols[name]
if eb, ok := b.(*EnumBuilder); ok {
mb.removeChild(eb)
return true
}
return false
}
// AddNestedEnum adds the given enum as a nested child of this message. If an
// error prevents the enum from being added, this method panics. This returns
// the message builder, for method chaining.
func (mb *MessageBuilder) AddNestedEnum(eb *EnumBuilder) *MessageBuilder {
if err := mb.TryAddNestedEnum(eb); err != nil {
panic(err)
}
return mb
}
// TryAddNestedEnum adds the given enum as a nested child of this message,
// returning any error that prevents the enum from being added (such as a name
// collision with another element already added to the message).
func (mb *MessageBuilder) TryAddNestedEnum(eb *EnumBuilder) error {
if err := mb.addSymbol(eb); err != nil {
return err
}
Unlink(eb)
eb.setParent(mb)
mb.nestedEnums = append(mb.nestedEnums, eb)
return nil
}
// SetOptions sets the message options for this message and returns the message,
// for method chaining.
func (mb *MessageBuilder) SetOptions(options *descriptorpb.MessageOptions) *MessageBuilder {
mb.Options = options
return mb
}
// AddExtensionRange adds the given extension range to this message. The range
// is inclusive of both the start and end, just like defining a range in proto
// IDL source. This returns the message, for method chaining.
func (mb *MessageBuilder) AddExtensionRange(start, end int32) *MessageBuilder {
return mb.AddExtensionRangeWithOptions(start, end, nil)
}
// AddExtensionRangeWithOptions adds the given extension range to this message.
// The range is inclusive of both the start and end, just like defining a range
// in proto IDL source. This returns the message, for method chaining.
func (mb *MessageBuilder) AddExtensionRangeWithOptions(start, end int32, options *descriptorpb.ExtensionRangeOptions) *MessageBuilder {
er := &descriptorpb.DescriptorProto_ExtensionRange{
Start: proto.Int32(start),
End: proto.Int32(end + 1),
Options: options,
}
mb.ExtensionRanges = append(mb.ExtensionRanges, er)
return mb
}
// SetExtensionRanges replaces all of this message's extension ranges with the
// given slice of ranges. Unlike AddExtensionRange and unlike the way ranges are
// defined in proto IDL source, a DescriptorProto_ExtensionRange struct treats
// the end of the range as *exclusive*. So the range is inclusive of the start
// but exclusive of the end. This returns the message, for method chaining.
func (mb *MessageBuilder) SetExtensionRanges(ranges []*descriptorpb.DescriptorProto_ExtensionRange) *MessageBuilder {
mb.ExtensionRanges = ranges
return mb
}
// AddReservedRange adds the given reserved range to this message. The range is
// inclusive of both the start and end, just like defining a range in proto IDL
// source. This returns the message, for method chaining.
func (mb *MessageBuilder) AddReservedRange(start, end int32) *MessageBuilder {
rr := &descriptorpb.DescriptorProto_ReservedRange{
Start: proto.Int32(start),
End: proto.Int32(end + 1),
}
mb.ReservedRanges = append(mb.ReservedRanges, rr)
return mb
}
// SetReservedRanges replaces all of this message's reserved ranges with the
// given slice of ranges. Unlike AddReservedRange and unlike the way ranges are
// defined in proto IDL source, a DescriptorProto_ReservedRange struct treats
// the end of the range as *exclusive* (so it would be the value defined in the
// IDL plus one). So the range is inclusive of the start but exclusive of the
// end. This returns the message, for method chaining.
func (mb *MessageBuilder) SetReservedRanges(ranges []*descriptorpb.DescriptorProto_ReservedRange) *MessageBuilder {
mb.ReservedRanges = ranges
return mb
}
// AddReservedName adds the given name to the list of reserved field names for
// this message. This returns the message, for method chaining.
func (mb *MessageBuilder) AddReservedName(name string) *MessageBuilder {
mb.ReservedNames = append(mb.ReservedNames, name)
return mb
}
// SetReservedNames replaces all of this message's reserved field names with the
// given slice of names. This returns the message, for method chaining.
func (mb *MessageBuilder) SetReservedNames(names []string) *MessageBuilder {
mb.ReservedNames = names
return mb
}
func (mb *MessageBuilder) buildProto(path []int32, sourceInfo *descriptorpb.SourceCodeInfo) (*descriptorpb.DescriptorProto, error) {
addCommentsTo(sourceInfo, path, &mb.comments)
var needTagsAssigned []*descriptorpb.FieldDescriptorProto
nestedMessages := make([]*descriptorpb.DescriptorProto, 0, len(mb.nestedMessages))
oneOfCount := 0
for _, b := range mb.fieldsAndOneOfs {
if _, ok := b.(*OneOfBuilder); ok {
oneOfCount++
}
}
fields := make([]*descriptorpb.FieldDescriptorProto, 0, len(mb.fieldsAndOneOfs)-oneOfCount)
oneOfs := make([]*descriptorpb.OneofDescriptorProto, 0, oneOfCount)
addField := func(flb *FieldBuilder, fld *descriptorpb.FieldDescriptorProto) error {
fields = append(fields, fld)
if flb.number == 0 {
needTagsAssigned = append(needTagsAssigned, fld)
}
if flb.msgType != nil {
nmpath := append(path, internal.Message_nestedMessagesTag, int32(len(nestedMessages)))
if entry, err := flb.msgType.buildProto(nmpath, sourceInfo); err != nil {
return err
} else {
nestedMessages = append(nestedMessages, entry)
}
}
return nil
}
for _, b := range mb.fieldsAndOneOfs {
if flb, ok := b.(*FieldBuilder); ok {
fldpath := append(path, internal.Message_fieldsTag, int32(len(fields)))
fld, err := flb.buildProto(fldpath, sourceInfo, mb.Options.GetMessageSetWireFormat())
if err != nil {
return nil, err
}
if err := addField(flb, fld); err != nil {
return nil, err
}
} else {
oopath := append(path, internal.Message_oneOfsTag, int32(len(oneOfs)))
oob := b.(*OneOfBuilder)
oobIndex := len(oneOfs)
ood, err := oob.buildProto(oopath, sourceInfo)
if err != nil {
return nil, err
}
oneOfs = append(oneOfs, ood)
for _, flb := range oob.choices {
path := append(path, internal.Message_fieldsTag, int32(len(fields)))
fld, err := flb.buildProto(path, sourceInfo, mb.Options.GetMessageSetWireFormat())
if err != nil {
return nil, err
}
fld.OneofIndex = proto.Int32(int32(oobIndex))
if err := addField(flb, fld); err != nil {
return nil, err
}
}
}
}
if len(needTagsAssigned) > 0 {
tags := make([]int, len(fields)-len(needTagsAssigned))
tagsIndex := 0
for _, fld := range fields {
tag := fld.GetNumber()
if tag != 0 {
tags[tagsIndex] = int(tag)
tagsIndex++
}
}
sort.Ints(tags)
t := 1
for len(needTagsAssigned) > 0 {
for len(tags) > 0 && t == tags[0] {
t++
tags = tags[1:]
}
needTagsAssigned[0].Number = proto.Int32(int32(t))
needTagsAssigned = needTagsAssigned[1:]
t++
}
}
for _, nmb := range mb.nestedMessages {
path := append(path, internal.Message_nestedMessagesTag, int32(len(nestedMessages)))
if nmd, err := nmb.buildProto(path, sourceInfo); err != nil {
return nil, err
} else {
nestedMessages = append(nestedMessages, nmd)
}
}
nestedExtensions := make([]*descriptorpb.FieldDescriptorProto, 0, len(mb.nestedExtensions))
for _, exb := range mb.nestedExtensions {
path := append(path, internal.Message_extensionsTag, int32(len(nestedExtensions)))
if exd, err := exb.buildProto(path, sourceInfo, isExtendeeMessageSet(exb)); err != nil {
return nil, err
} else {
nestedExtensions = append(nestedExtensions, exd)
}
}
nestedEnums := make([]*descriptorpb.EnumDescriptorProto, 0, len(mb.nestedEnums))
for _, eb := range mb.nestedEnums {
path := append(path, internal.Message_enumsTag, int32(len(nestedEnums)))
if ed, err := eb.buildProto(path, sourceInfo); err != nil {
return nil, err
} else {
nestedEnums = append(nestedEnums, ed)
}
}
md := &descriptorpb.DescriptorProto{
Name: proto.String(mb.name),
Options: mb.Options,
Field: fields,
OneofDecl: oneOfs,
NestedType: nestedMessages,
EnumType: nestedEnums,
Extension: nestedExtensions,
ExtensionRange: mb.ExtensionRanges,
ReservedName: mb.ReservedNames,
ReservedRange: mb.ReservedRanges,
}
if mb.GetFile().IsProto3 {
internal.ProcessProto3OptionalFields(md, nil)
}
return md, nil
}
// Build constructs a message descriptor based on the contents of this message
// builder. If there are any problems constructing the descriptor, including
// resolving symbols referenced by the builder or failing to meet certain
// validation rules, an error is returned.
func (mb *MessageBuilder) Build() (*desc.MessageDescriptor, error) {
md, err := mb.BuildDescriptor()
if err != nil {
return nil, err
}
return md.(*desc.MessageDescriptor), nil
}
// BuildDescriptor constructs a message descriptor based on the contents of this
// message builder. Most usages will prefer Build() instead, whose return type
// is a concrete descriptor type. This method is present to satisfy the Builder
// interface.
func (mb *MessageBuilder) BuildDescriptor() (desc.Descriptor, error) {
return doBuild(mb, BuilderOptions{})
}