75 lines
1.9 KiB
Go
75 lines
1.9 KiB
Go
// Copyright 2019 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package impl
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import (
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"fmt"
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pref "google.golang.org/protobuf/reflect/protoreflect"
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"google.golang.org/protobuf/reflect/protoregistry"
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)
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// weakFields adds methods to the exported WeakFields type for internal use.
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//
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// The exported type is an alias to an unnamed type, so methods can't be
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// defined directly on it.
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type weakFields WeakFields
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func (w weakFields) get(num pref.FieldNumber) (pref.ProtoMessage, bool) {
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m, ok := w[int32(num)]
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return m, ok
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}
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func (w *weakFields) set(num pref.FieldNumber, m pref.ProtoMessage) {
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if *w == nil {
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*w = make(weakFields)
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}
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(*w)[int32(num)] = m
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}
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func (w *weakFields) clear(num pref.FieldNumber) {
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delete(*w, int32(num))
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}
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func (Export) HasWeak(w WeakFields, num pref.FieldNumber) bool {
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_, ok := w[int32(num)]
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return ok
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}
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func (Export) ClearWeak(w *WeakFields, num pref.FieldNumber) {
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delete(*w, int32(num))
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}
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func (Export) GetWeak(w WeakFields, num pref.FieldNumber, name pref.FullName) pref.ProtoMessage {
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if m, ok := w[int32(num)]; ok {
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return m
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}
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mt, _ := protoregistry.GlobalTypes.FindMessageByName(name)
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if mt == nil {
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panic(fmt.Sprintf("message %v for weak field is not linked in", name))
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}
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return mt.Zero().Interface()
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}
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func (Export) SetWeak(w *WeakFields, num pref.FieldNumber, name pref.FullName, m pref.ProtoMessage) {
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if m != nil {
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mt, _ := protoregistry.GlobalTypes.FindMessageByName(name)
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if mt == nil {
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panic(fmt.Sprintf("message %v for weak field is not linked in", name))
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}
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if mt != m.ProtoReflect().Type() {
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panic(fmt.Sprintf("invalid message type for weak field: got %T, want %T", m, mt.Zero().Interface()))
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}
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}
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if m == nil || !m.ProtoReflect().IsValid() {
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delete(*w, int32(num))
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return
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}
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if *w == nil {
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*w = make(weakFields)
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}
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(*w)[int32(num)] = m
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}
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