[VOL-4291] Rw-core updates for gRPC migration
Change-Id: I8d5a554409115b29318089671ca4e1ab3fa98810
diff --git a/vendor/google.golang.org/protobuf/internal/impl/legacy_extension.go b/vendor/google.golang.org/protobuf/internal/impl/legacy_extension.go
new file mode 100644
index 0000000..49e7231
--- /dev/null
+++ b/vendor/google.golang.org/protobuf/internal/impl/legacy_extension.go
@@ -0,0 +1,176 @@
+// 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 (
+ "reflect"
+
+ "google.golang.org/protobuf/internal/descopts"
+ "google.golang.org/protobuf/internal/encoding/messageset"
+ ptag "google.golang.org/protobuf/internal/encoding/tag"
+ "google.golang.org/protobuf/internal/filedesc"
+ "google.golang.org/protobuf/internal/pragma"
+ pref "google.golang.org/protobuf/reflect/protoreflect"
+ preg "google.golang.org/protobuf/reflect/protoregistry"
+ piface "google.golang.org/protobuf/runtime/protoiface"
+)
+
+func (xi *ExtensionInfo) initToLegacy() {
+ xd := xi.desc
+ var parent piface.MessageV1
+ messageName := xd.ContainingMessage().FullName()
+ if mt, _ := preg.GlobalTypes.FindMessageByName(messageName); mt != nil {
+ // Create a new parent message and unwrap it if possible.
+ mv := mt.New().Interface()
+ t := reflect.TypeOf(mv)
+ if mv, ok := mv.(unwrapper); ok {
+ t = reflect.TypeOf(mv.protoUnwrap())
+ }
+
+ // Check whether the message implements the legacy v1 Message interface.
+ mz := reflect.Zero(t).Interface()
+ if mz, ok := mz.(piface.MessageV1); ok {
+ parent = mz
+ }
+ }
+
+ // Determine the v1 extension type, which is unfortunately not the same as
+ // the v2 ExtensionType.GoType.
+ extType := xi.goType
+ switch extType.Kind() {
+ case reflect.Bool, reflect.Int32, reflect.Int64, reflect.Uint32, reflect.Uint64, reflect.Float32, reflect.Float64, reflect.String:
+ extType = reflect.PtrTo(extType) // T -> *T for singular scalar fields
+ }
+
+ // Reconstruct the legacy enum full name.
+ var enumName string
+ if xd.Kind() == pref.EnumKind {
+ enumName = legacyEnumName(xd.Enum())
+ }
+
+ // Derive the proto file that the extension was declared within.
+ var filename string
+ if fd := xd.ParentFile(); fd != nil {
+ filename = fd.Path()
+ }
+
+ // For MessageSet extensions, the name used is the parent message.
+ name := xd.FullName()
+ if messageset.IsMessageSetExtension(xd) {
+ name = name.Parent()
+ }
+
+ xi.ExtendedType = parent
+ xi.ExtensionType = reflect.Zero(extType).Interface()
+ xi.Field = int32(xd.Number())
+ xi.Name = string(name)
+ xi.Tag = ptag.Marshal(xd, enumName)
+ xi.Filename = filename
+}
+
+// initFromLegacy initializes an ExtensionInfo from
+// the contents of the deprecated exported fields of the type.
+func (xi *ExtensionInfo) initFromLegacy() {
+ // The v1 API returns "type incomplete" descriptors where only the
+ // field number is specified. In such a case, use a placeholder.
+ if xi.ExtendedType == nil || xi.ExtensionType == nil {
+ xd := placeholderExtension{
+ name: pref.FullName(xi.Name),
+ number: pref.FieldNumber(xi.Field),
+ }
+ xi.desc = extensionTypeDescriptor{xd, xi}
+ return
+ }
+
+ // Resolve enum or message dependencies.
+ var ed pref.EnumDescriptor
+ var md pref.MessageDescriptor
+ t := reflect.TypeOf(xi.ExtensionType)
+ isOptional := t.Kind() == reflect.Ptr && t.Elem().Kind() != reflect.Struct
+ isRepeated := t.Kind() == reflect.Slice && t.Elem().Kind() != reflect.Uint8
+ if isOptional || isRepeated {
+ t = t.Elem()
+ }
+ switch v := reflect.Zero(t).Interface().(type) {
+ case pref.Enum:
+ ed = v.Descriptor()
+ case enumV1:
+ ed = LegacyLoadEnumDesc(t)
+ case pref.ProtoMessage:
+ md = v.ProtoReflect().Descriptor()
+ case messageV1:
+ md = LegacyLoadMessageDesc(t)
+ }
+
+ // Derive basic field information from the struct tag.
+ var evs pref.EnumValueDescriptors
+ if ed != nil {
+ evs = ed.Values()
+ }
+ fd := ptag.Unmarshal(xi.Tag, t, evs).(*filedesc.Field)
+
+ // Construct a v2 ExtensionType.
+ xd := &filedesc.Extension{L2: new(filedesc.ExtensionL2)}
+ xd.L0.ParentFile = filedesc.SurrogateProto2
+ xd.L0.FullName = pref.FullName(xi.Name)
+ xd.L1.Number = pref.FieldNumber(xi.Field)
+ xd.L1.Cardinality = fd.L1.Cardinality
+ xd.L1.Kind = fd.L1.Kind
+ xd.L2.IsPacked = fd.L1.IsPacked
+ xd.L2.Default = fd.L1.Default
+ xd.L1.Extendee = Export{}.MessageDescriptorOf(xi.ExtendedType)
+ xd.L2.Enum = ed
+ xd.L2.Message = md
+
+ // Derive real extension field name for MessageSets.
+ if messageset.IsMessageSet(xd.L1.Extendee) && md.FullName() == xd.L0.FullName {
+ xd.L0.FullName = xd.L0.FullName.Append(messageset.ExtensionName)
+ }
+
+ tt := reflect.TypeOf(xi.ExtensionType)
+ if isOptional {
+ tt = tt.Elem()
+ }
+ xi.goType = tt
+ xi.desc = extensionTypeDescriptor{xd, xi}
+}
+
+type placeholderExtension struct {
+ name pref.FullName
+ number pref.FieldNumber
+}
+
+func (x placeholderExtension) ParentFile() pref.FileDescriptor { return nil }
+func (x placeholderExtension) Parent() pref.Descriptor { return nil }
+func (x placeholderExtension) Index() int { return 0 }
+func (x placeholderExtension) Syntax() pref.Syntax { return 0 }
+func (x placeholderExtension) Name() pref.Name { return x.name.Name() }
+func (x placeholderExtension) FullName() pref.FullName { return x.name }
+func (x placeholderExtension) IsPlaceholder() bool { return true }
+func (x placeholderExtension) Options() pref.ProtoMessage { return descopts.Field }
+func (x placeholderExtension) Number() pref.FieldNumber { return x.number }
+func (x placeholderExtension) Cardinality() pref.Cardinality { return 0 }
+func (x placeholderExtension) Kind() pref.Kind { return 0 }
+func (x placeholderExtension) HasJSONName() bool { return false }
+func (x placeholderExtension) JSONName() string { return "[" + string(x.name) + "]" }
+func (x placeholderExtension) TextName() string { return "[" + string(x.name) + "]" }
+func (x placeholderExtension) HasPresence() bool { return false }
+func (x placeholderExtension) HasOptionalKeyword() bool { return false }
+func (x placeholderExtension) IsExtension() bool { return true }
+func (x placeholderExtension) IsWeak() bool { return false }
+func (x placeholderExtension) IsPacked() bool { return false }
+func (x placeholderExtension) IsList() bool { return false }
+func (x placeholderExtension) IsMap() bool { return false }
+func (x placeholderExtension) MapKey() pref.FieldDescriptor { return nil }
+func (x placeholderExtension) MapValue() pref.FieldDescriptor { return nil }
+func (x placeholderExtension) HasDefault() bool { return false }
+func (x placeholderExtension) Default() pref.Value { return pref.Value{} }
+func (x placeholderExtension) DefaultEnumValue() pref.EnumValueDescriptor { return nil }
+func (x placeholderExtension) ContainingOneof() pref.OneofDescriptor { return nil }
+func (x placeholderExtension) ContainingMessage() pref.MessageDescriptor { return nil }
+func (x placeholderExtension) Enum() pref.EnumDescriptor { return nil }
+func (x placeholderExtension) Message() pref.MessageDescriptor { return nil }
+func (x placeholderExtension) ProtoType(pref.FieldDescriptor) { return }
+func (x placeholderExtension) ProtoInternal(pragma.DoNotImplement) { return }