Method marshalAny

jsonpb/encode.go:314–370

(m protoreflect.Message, indent string)

}

func (w *jsonWriter) marshalAny(m protoreflect.Message, indent string) error {
	// "If the Any contains a value that has a special JSON mapping,
	//  it will be converted as follows: {"@type": xxx, "value": yyy}.
	//  Otherwise, the value will be converted into a JSON object,
	//  and the "@type" field will be inserted to indicate the actual data type."
	md := m.Descriptor()
	typeURL := m.Get(md.Fields().ByNumber(1)).String()
	rawVal := m.Get(md.Fields().ByNumber(2)).Bytes()

	var m2 protoreflect.Message
	if w.AnyResolver != nil {
		mi, err := w.AnyResolver.Resolve(typeURL)
		if err != nil {
			return err
		}
		m2 = proto.MessageReflect(mi)
	} else {
		mt, err := protoregistry.GlobalTypes.FindMessageByURL(typeURL)
		if err != nil {
			return err
		}
		m2 = mt.New()
	}

	if err := protoV2.Unmarshal(rawVal, m2.Interface()); err != nil {
		return err
	}

	if wellKnownType(m2.Descriptor().FullName()) == "" {
		return w.marshalMessage(m2, indent, typeURL)
	}

	w.write("{")
	if w.Indent != "" {
		w.write("\n")
	}
	if err := w.marshalTypeURL(indent, typeURL); err != nil {
		return err
	}
	w.writeComma()
	if w.Indent != "" {
		w.write(indent)
		w.write(w.Indent)
		w.write(`"value": `)
	} else {
		w.write(`"value":`)
	}
	if err := w.marshalMessage(m2, indent+w.Indent, ""); err != nil {
		return err
	}
	if w.Indent != "" {
		w.write("\n")
		w.write(indent)
	}
	w.write("}")
	return nil
}