[VOL-4291] OfAgent changes for gRPC migration
Change-Id: I8da1db6df49d478ef24ec8f9bd719e9692f48a7f
diff --git a/vendor/google.golang.org/protobuf/internal/impl/message_reflect_field.go b/vendor/google.golang.org/protobuf/internal/impl/message_reflect_field.go
new file mode 100644
index 0000000..343cf87
--- /dev/null
+++ b/vendor/google.golang.org/protobuf/internal/impl/message_reflect_field.go
@@ -0,0 +1,543 @@
+// 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"
+ "math"
+ "reflect"
+ "sync"
+
+ "google.golang.org/protobuf/internal/flags"
+ pref "google.golang.org/protobuf/reflect/protoreflect"
+ preg "google.golang.org/protobuf/reflect/protoregistry"
+)
+
+type fieldInfo struct {
+ fieldDesc pref.FieldDescriptor
+
+ // These fields are used for protobuf reflection support.
+ has func(pointer) bool
+ clear func(pointer)
+ get func(pointer) pref.Value
+ set func(pointer, pref.Value)
+ mutable func(pointer) pref.Value
+ newMessage func() pref.Message
+ newField func() pref.Value
+}
+
+func fieldInfoForMissing(fd pref.FieldDescriptor) fieldInfo {
+ // This never occurs for generated message types.
+ // It implies that a hand-crafted type has missing Go fields
+ // for specific protobuf message fields.
+ return fieldInfo{
+ fieldDesc: fd,
+ has: func(p pointer) bool {
+ return false
+ },
+ clear: func(p pointer) {
+ panic("missing Go struct field for " + string(fd.FullName()))
+ },
+ get: func(p pointer) pref.Value {
+ return fd.Default()
+ },
+ set: func(p pointer, v pref.Value) {
+ panic("missing Go struct field for " + string(fd.FullName()))
+ },
+ mutable: func(p pointer) pref.Value {
+ panic("missing Go struct field for " + string(fd.FullName()))
+ },
+ newMessage: func() pref.Message {
+ panic("missing Go struct field for " + string(fd.FullName()))
+ },
+ newField: func() pref.Value {
+ if v := fd.Default(); v.IsValid() {
+ return v
+ }
+ panic("missing Go struct field for " + string(fd.FullName()))
+ },
+ }
+}
+
+func fieldInfoForOneof(fd pref.FieldDescriptor, fs reflect.StructField, x exporter, ot reflect.Type) fieldInfo {
+ ft := fs.Type
+ if ft.Kind() != reflect.Interface {
+ panic(fmt.Sprintf("field %v has invalid type: got %v, want interface kind", fd.FullName(), ft))
+ }
+ if ot.Kind() != reflect.Struct {
+ panic(fmt.Sprintf("field %v has invalid type: got %v, want struct kind", fd.FullName(), ot))
+ }
+ if !reflect.PtrTo(ot).Implements(ft) {
+ panic(fmt.Sprintf("field %v has invalid type: %v does not implement %v", fd.FullName(), ot, ft))
+ }
+ conv := NewConverter(ot.Field(0).Type, fd)
+ isMessage := fd.Message() != nil
+
+ // TODO: Implement unsafe fast path?
+ fieldOffset := offsetOf(fs, x)
+ return fieldInfo{
+ // NOTE: The logic below intentionally assumes that oneof fields are
+ // well-formatted. That is, the oneof interface never contains a
+ // typed nil pointer to one of the wrapper structs.
+
+ fieldDesc: fd,
+ has: func(p pointer) bool {
+ if p.IsNil() {
+ return false
+ }
+ rv := p.Apply(fieldOffset).AsValueOf(fs.Type).Elem()
+ if rv.IsNil() || rv.Elem().Type().Elem() != ot || rv.Elem().IsNil() {
+ return false
+ }
+ return true
+ },
+ clear: func(p pointer) {
+ rv := p.Apply(fieldOffset).AsValueOf(fs.Type).Elem()
+ if rv.IsNil() || rv.Elem().Type().Elem() != ot {
+ // NOTE: We intentionally don't check for rv.Elem().IsNil()
+ // so that (*OneofWrapperType)(nil) gets cleared to nil.
+ return
+ }
+ rv.Set(reflect.Zero(rv.Type()))
+ },
+ get: func(p pointer) pref.Value {
+ if p.IsNil() {
+ return conv.Zero()
+ }
+ rv := p.Apply(fieldOffset).AsValueOf(fs.Type).Elem()
+ if rv.IsNil() || rv.Elem().Type().Elem() != ot || rv.Elem().IsNil() {
+ return conv.Zero()
+ }
+ rv = rv.Elem().Elem().Field(0)
+ return conv.PBValueOf(rv)
+ },
+ set: func(p pointer, v pref.Value) {
+ rv := p.Apply(fieldOffset).AsValueOf(fs.Type).Elem()
+ if rv.IsNil() || rv.Elem().Type().Elem() != ot || rv.Elem().IsNil() {
+ rv.Set(reflect.New(ot))
+ }
+ rv = rv.Elem().Elem().Field(0)
+ rv.Set(conv.GoValueOf(v))
+ },
+ mutable: func(p pointer) pref.Value {
+ if !isMessage {
+ panic(fmt.Sprintf("field %v with invalid Mutable call on field with non-composite type", fd.FullName()))
+ }
+ rv := p.Apply(fieldOffset).AsValueOf(fs.Type).Elem()
+ if rv.IsNil() || rv.Elem().Type().Elem() != ot || rv.Elem().IsNil() {
+ rv.Set(reflect.New(ot))
+ }
+ rv = rv.Elem().Elem().Field(0)
+ if rv.Kind() == reflect.Ptr && rv.IsNil() {
+ rv.Set(conv.GoValueOf(pref.ValueOfMessage(conv.New().Message())))
+ }
+ return conv.PBValueOf(rv)
+ },
+ newMessage: func() pref.Message {
+ return conv.New().Message()
+ },
+ newField: func() pref.Value {
+ return conv.New()
+ },
+ }
+}
+
+func fieldInfoForMap(fd pref.FieldDescriptor, fs reflect.StructField, x exporter) fieldInfo {
+ ft := fs.Type
+ if ft.Kind() != reflect.Map {
+ panic(fmt.Sprintf("field %v has invalid type: got %v, want map kind", fd.FullName(), ft))
+ }
+ conv := NewConverter(ft, fd)
+
+ // TODO: Implement unsafe fast path?
+ fieldOffset := offsetOf(fs, x)
+ return fieldInfo{
+ fieldDesc: fd,
+ has: func(p pointer) bool {
+ if p.IsNil() {
+ return false
+ }
+ rv := p.Apply(fieldOffset).AsValueOf(fs.Type).Elem()
+ return rv.Len() > 0
+ },
+ clear: func(p pointer) {
+ rv := p.Apply(fieldOffset).AsValueOf(fs.Type).Elem()
+ rv.Set(reflect.Zero(rv.Type()))
+ },
+ get: func(p pointer) pref.Value {
+ if p.IsNil() {
+ return conv.Zero()
+ }
+ rv := p.Apply(fieldOffset).AsValueOf(fs.Type).Elem()
+ if rv.Len() == 0 {
+ return conv.Zero()
+ }
+ return conv.PBValueOf(rv)
+ },
+ set: func(p pointer, v pref.Value) {
+ rv := p.Apply(fieldOffset).AsValueOf(fs.Type).Elem()
+ pv := conv.GoValueOf(v)
+ if pv.IsNil() {
+ panic(fmt.Sprintf("map field %v cannot be set with read-only value", fd.FullName()))
+ }
+ rv.Set(pv)
+ },
+ mutable: func(p pointer) pref.Value {
+ v := p.Apply(fieldOffset).AsValueOf(fs.Type).Elem()
+ if v.IsNil() {
+ v.Set(reflect.MakeMap(fs.Type))
+ }
+ return conv.PBValueOf(v)
+ },
+ newField: func() pref.Value {
+ return conv.New()
+ },
+ }
+}
+
+func fieldInfoForList(fd pref.FieldDescriptor, fs reflect.StructField, x exporter) fieldInfo {
+ ft := fs.Type
+ if ft.Kind() != reflect.Slice {
+ panic(fmt.Sprintf("field %v has invalid type: got %v, want slice kind", fd.FullName(), ft))
+ }
+ conv := NewConverter(reflect.PtrTo(ft), fd)
+
+ // TODO: Implement unsafe fast path?
+ fieldOffset := offsetOf(fs, x)
+ return fieldInfo{
+ fieldDesc: fd,
+ has: func(p pointer) bool {
+ if p.IsNil() {
+ return false
+ }
+ rv := p.Apply(fieldOffset).AsValueOf(fs.Type).Elem()
+ return rv.Len() > 0
+ },
+ clear: func(p pointer) {
+ rv := p.Apply(fieldOffset).AsValueOf(fs.Type).Elem()
+ rv.Set(reflect.Zero(rv.Type()))
+ },
+ get: func(p pointer) pref.Value {
+ if p.IsNil() {
+ return conv.Zero()
+ }
+ rv := p.Apply(fieldOffset).AsValueOf(fs.Type)
+ if rv.Elem().Len() == 0 {
+ return conv.Zero()
+ }
+ return conv.PBValueOf(rv)
+ },
+ set: func(p pointer, v pref.Value) {
+ rv := p.Apply(fieldOffset).AsValueOf(fs.Type).Elem()
+ pv := conv.GoValueOf(v)
+ if pv.IsNil() {
+ panic(fmt.Sprintf("list field %v cannot be set with read-only value", fd.FullName()))
+ }
+ rv.Set(pv.Elem())
+ },
+ mutable: func(p pointer) pref.Value {
+ v := p.Apply(fieldOffset).AsValueOf(fs.Type)
+ return conv.PBValueOf(v)
+ },
+ newField: func() pref.Value {
+ return conv.New()
+ },
+ }
+}
+
+var (
+ nilBytes = reflect.ValueOf([]byte(nil))
+ emptyBytes = reflect.ValueOf([]byte{})
+)
+
+func fieldInfoForScalar(fd pref.FieldDescriptor, fs reflect.StructField, x exporter) fieldInfo {
+ ft := fs.Type
+ nullable := fd.HasPresence()
+ isBytes := ft.Kind() == reflect.Slice && ft.Elem().Kind() == reflect.Uint8
+ if nullable {
+ if ft.Kind() != reflect.Ptr && ft.Kind() != reflect.Slice {
+ // This never occurs for generated message types.
+ // Despite the protobuf type system specifying presence,
+ // the Go field type cannot represent it.
+ nullable = false
+ }
+ if ft.Kind() == reflect.Ptr {
+ ft = ft.Elem()
+ }
+ }
+ conv := NewConverter(ft, fd)
+
+ // TODO: Implement unsafe fast path?
+ fieldOffset := offsetOf(fs, x)
+ return fieldInfo{
+ fieldDesc: fd,
+ has: func(p pointer) bool {
+ if p.IsNil() {
+ return false
+ }
+ rv := p.Apply(fieldOffset).AsValueOf(fs.Type).Elem()
+ if nullable {
+ return !rv.IsNil()
+ }
+ switch rv.Kind() {
+ case reflect.Bool:
+ return rv.Bool()
+ case reflect.Int32, reflect.Int64:
+ return rv.Int() != 0
+ case reflect.Uint32, reflect.Uint64:
+ return rv.Uint() != 0
+ case reflect.Float32, reflect.Float64:
+ return rv.Float() != 0 || math.Signbit(rv.Float())
+ case reflect.String, reflect.Slice:
+ return rv.Len() > 0
+ default:
+ panic(fmt.Sprintf("field %v has invalid type: %v", fd.FullName(), rv.Type())) // should never happen
+ }
+ },
+ clear: func(p pointer) {
+ rv := p.Apply(fieldOffset).AsValueOf(fs.Type).Elem()
+ rv.Set(reflect.Zero(rv.Type()))
+ },
+ get: func(p pointer) pref.Value {
+ if p.IsNil() {
+ return conv.Zero()
+ }
+ rv := p.Apply(fieldOffset).AsValueOf(fs.Type).Elem()
+ if nullable {
+ if rv.IsNil() {
+ return conv.Zero()
+ }
+ if rv.Kind() == reflect.Ptr {
+ rv = rv.Elem()
+ }
+ }
+ return conv.PBValueOf(rv)
+ },
+ set: func(p pointer, v pref.Value) {
+ rv := p.Apply(fieldOffset).AsValueOf(fs.Type).Elem()
+ if nullable && rv.Kind() == reflect.Ptr {
+ if rv.IsNil() {
+ rv.Set(reflect.New(ft))
+ }
+ rv = rv.Elem()
+ }
+ rv.Set(conv.GoValueOf(v))
+ if isBytes && rv.Len() == 0 {
+ if nullable {
+ rv.Set(emptyBytes) // preserve presence
+ } else {
+ rv.Set(nilBytes) // do not preserve presence
+ }
+ }
+ },
+ newField: func() pref.Value {
+ return conv.New()
+ },
+ }
+}
+
+func fieldInfoForWeakMessage(fd pref.FieldDescriptor, weakOffset offset) fieldInfo {
+ if !flags.ProtoLegacy {
+ panic("no support for proto1 weak fields")
+ }
+
+ var once sync.Once
+ var messageType pref.MessageType
+ lazyInit := func() {
+ once.Do(func() {
+ messageName := fd.Message().FullName()
+ messageType, _ = preg.GlobalTypes.FindMessageByName(messageName)
+ if messageType == nil {
+ panic(fmt.Sprintf("weak message %v for field %v is not linked in", messageName, fd.FullName()))
+ }
+ })
+ }
+
+ num := fd.Number()
+ return fieldInfo{
+ fieldDesc: fd,
+ has: func(p pointer) bool {
+ if p.IsNil() {
+ return false
+ }
+ _, ok := p.Apply(weakOffset).WeakFields().get(num)
+ return ok
+ },
+ clear: func(p pointer) {
+ p.Apply(weakOffset).WeakFields().clear(num)
+ },
+ get: func(p pointer) pref.Value {
+ lazyInit()
+ if p.IsNil() {
+ return pref.ValueOfMessage(messageType.Zero())
+ }
+ m, ok := p.Apply(weakOffset).WeakFields().get(num)
+ if !ok {
+ return pref.ValueOfMessage(messageType.Zero())
+ }
+ return pref.ValueOfMessage(m.ProtoReflect())
+ },
+ set: func(p pointer, v pref.Value) {
+ lazyInit()
+ m := v.Message()
+ if m.Descriptor() != messageType.Descriptor() {
+ if got, want := m.Descriptor().FullName(), messageType.Descriptor().FullName(); got != want {
+ panic(fmt.Sprintf("field %v has mismatching message descriptor: got %v, want %v", fd.FullName(), got, want))
+ }
+ panic(fmt.Sprintf("field %v has mismatching message descriptor: %v", fd.FullName(), m.Descriptor().FullName()))
+ }
+ p.Apply(weakOffset).WeakFields().set(num, m.Interface())
+ },
+ mutable: func(p pointer) pref.Value {
+ lazyInit()
+ fs := p.Apply(weakOffset).WeakFields()
+ m, ok := fs.get(num)
+ if !ok {
+ m = messageType.New().Interface()
+ fs.set(num, m)
+ }
+ return pref.ValueOfMessage(m.ProtoReflect())
+ },
+ newMessage: func() pref.Message {
+ lazyInit()
+ return messageType.New()
+ },
+ newField: func() pref.Value {
+ lazyInit()
+ return pref.ValueOfMessage(messageType.New())
+ },
+ }
+}
+
+func fieldInfoForMessage(fd pref.FieldDescriptor, fs reflect.StructField, x exporter) fieldInfo {
+ ft := fs.Type
+ conv := NewConverter(ft, fd)
+
+ // TODO: Implement unsafe fast path?
+ fieldOffset := offsetOf(fs, x)
+ return fieldInfo{
+ fieldDesc: fd,
+ has: func(p pointer) bool {
+ if p.IsNil() {
+ return false
+ }
+ rv := p.Apply(fieldOffset).AsValueOf(fs.Type).Elem()
+ if fs.Type.Kind() != reflect.Ptr {
+ return !isZero(rv)
+ }
+ return !rv.IsNil()
+ },
+ clear: func(p pointer) {
+ rv := p.Apply(fieldOffset).AsValueOf(fs.Type).Elem()
+ rv.Set(reflect.Zero(rv.Type()))
+ },
+ get: func(p pointer) pref.Value {
+ if p.IsNil() {
+ return conv.Zero()
+ }
+ rv := p.Apply(fieldOffset).AsValueOf(fs.Type).Elem()
+ return conv.PBValueOf(rv)
+ },
+ set: func(p pointer, v pref.Value) {
+ rv := p.Apply(fieldOffset).AsValueOf(fs.Type).Elem()
+ rv.Set(conv.GoValueOf(v))
+ if fs.Type.Kind() == reflect.Ptr && rv.IsNil() {
+ panic(fmt.Sprintf("field %v has invalid nil pointer", fd.FullName()))
+ }
+ },
+ mutable: func(p pointer) pref.Value {
+ rv := p.Apply(fieldOffset).AsValueOf(fs.Type).Elem()
+ if fs.Type.Kind() == reflect.Ptr && rv.IsNil() {
+ rv.Set(conv.GoValueOf(conv.New()))
+ }
+ return conv.PBValueOf(rv)
+ },
+ newMessage: func() pref.Message {
+ return conv.New().Message()
+ },
+ newField: func() pref.Value {
+ return conv.New()
+ },
+ }
+}
+
+type oneofInfo struct {
+ oneofDesc pref.OneofDescriptor
+ which func(pointer) pref.FieldNumber
+}
+
+func makeOneofInfo(od pref.OneofDescriptor, si structInfo, x exporter) *oneofInfo {
+ oi := &oneofInfo{oneofDesc: od}
+ if od.IsSynthetic() {
+ fs := si.fieldsByNumber[od.Fields().Get(0).Number()]
+ fieldOffset := offsetOf(fs, x)
+ oi.which = func(p pointer) pref.FieldNumber {
+ if p.IsNil() {
+ return 0
+ }
+ rv := p.Apply(fieldOffset).AsValueOf(fs.Type).Elem()
+ if rv.IsNil() { // valid on either *T or []byte
+ return 0
+ }
+ return od.Fields().Get(0).Number()
+ }
+ } else {
+ fs := si.oneofsByName[od.Name()]
+ fieldOffset := offsetOf(fs, x)
+ oi.which = func(p pointer) pref.FieldNumber {
+ if p.IsNil() {
+ return 0
+ }
+ rv := p.Apply(fieldOffset).AsValueOf(fs.Type).Elem()
+ if rv.IsNil() {
+ return 0
+ }
+ rv = rv.Elem()
+ if rv.IsNil() {
+ return 0
+ }
+ return si.oneofWrappersByType[rv.Type().Elem()]
+ }
+ }
+ return oi
+}
+
+// isZero is identical to reflect.Value.IsZero.
+// TODO: Remove this when Go1.13 is the minimally supported Go version.
+func isZero(v reflect.Value) bool {
+ switch v.Kind() {
+ case reflect.Bool:
+ return !v.Bool()
+ case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+ return v.Int() == 0
+ case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
+ return v.Uint() == 0
+ case reflect.Float32, reflect.Float64:
+ return math.Float64bits(v.Float()) == 0
+ case reflect.Complex64, reflect.Complex128:
+ c := v.Complex()
+ return math.Float64bits(real(c)) == 0 && math.Float64bits(imag(c)) == 0
+ case reflect.Array:
+ for i := 0; i < v.Len(); i++ {
+ if !isZero(v.Index(i)) {
+ return false
+ }
+ }
+ return true
+ case reflect.Chan, reflect.Func, reflect.Interface, reflect.Map, reflect.Ptr, reflect.Slice, reflect.UnsafePointer:
+ return v.IsNil()
+ case reflect.String:
+ return v.Len() == 0
+ case reflect.Struct:
+ for i := 0; i < v.NumField(); i++ {
+ if !isZero(v.Field(i)) {
+ return false
+ }
+ }
+ return true
+ default:
+ panic(&reflect.ValueError{"reflect.Value.IsZero", v.Kind()})
+ }
+}