Method marshalAny

encoding/prototext/encode.go:346–380

marshalAny marshals the given google.protobuf.Any message in expanded form. It returns true if it was able to marshal, else false.

(any protoreflect.Message)

// marshalAny marshals the given google.protobuf.Any message in expanded form.
// It returns true if it was able to marshal, else false.
func (e encoder) marshalAny(any protoreflect.Message) bool {
	// Construct the embedded message.
	fds := any.Descriptor().Fields()
	fdType := fds.ByNumber(genid.Any_TypeUrl_field_number)
	typeURL := any.Get(fdType).String()
	mt, err := e.opts.Resolver.FindMessageByURL(typeURL)
	if err != nil {
		return false
	}
	m := mt.New().Interface()

	// Unmarshal bytes into embedded message.
	fdValue := fds.ByNumber(genid.Any_Value_field_number)
	value := any.Get(fdValue)
	err = proto.UnmarshalOptions{
		AllowPartial: true,
		Resolver:     e.opts.Resolver,
	}.Unmarshal(value.Bytes(), m)
	if err != nil {
		return false
	}

	// Get current encoder position. If marshaling fails, reset encoder output
	// back to this position.
	pos := e.Snapshot()

	// Field name is the proto field name enclosed in [].
	e.WriteName("[" + typeURL + "]")
	err = e.marshalMessage(m.ProtoReflect(), true)
	if err != nil {
		e.Reset(pos)
		return false
	}
	return true
}