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// Copyright 2019 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"
pref "google.golang.org/protobuf/reflect/protoreflect"
"google.golang.org/protobuf/reflect/protoregistry"
)
// weakFields adds methods to the exported WeakFields type for internal use.
//
// The exported type is an alias to an unnamed type, so methods can't be
// defined directly on it.
type weakFields WeakFields
func (w weakFields) get(num pref.FieldNumber) (pref.ProtoMessage, bool) {
m, ok := w[int32(num)]
return m, ok
}
func (w *weakFields) set(num pref.FieldNumber, m pref.ProtoMessage) {
if *w == nil {
*w = make(weakFields)
}
(*w)[int32(num)] = m
}
func (w *weakFields) clear(num pref.FieldNumber) {
delete(*w, int32(num))
}
func (Export) HasWeak(w WeakFields, num pref.FieldNumber) bool {
_, ok := w[int32(num)]
return ok
}
func (Export) ClearWeak(w *WeakFields, num pref.FieldNumber) {
delete(*w, int32(num))
}
func (Export) GetWeak(w WeakFields, num pref.FieldNumber, name pref.FullName) pref.ProtoMessage {
if m, ok := w[int32(num)]; ok {
return m
}
mt, _ := protoregistry.GlobalTypes.FindMessageByName(name)
if mt == nil {
panic(fmt.Sprintf("message %v for weak field is not linked in", name))
}
return mt.Zero().Interface()
}
func (Export) SetWeak(w *WeakFields, num pref.FieldNumber, name pref.FullName, m pref.ProtoMessage) {
if m != nil {
mt, _ := protoregistry.GlobalTypes.FindMessageByName(name)
if mt == nil {
panic(fmt.Sprintf("message %v for weak field is not linked in", name))
}
if mt != m.ProtoReflect().Type() {
panic(fmt.Sprintf("invalid message type for weak field: got %T, want %T", m, mt.Zero().Interface()))
}
}
if m == nil || !m.ProtoReflect().IsValid() {
delete(*w, int32(num))
return
}
if *w == nil {
*w = make(weakFields)
}
(*w)[int32(num)] = m
}
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