Method marshal

jsonpb/encode.go:86–120

(m proto.Message)

}

func (jm *Marshaler) marshal(m proto.Message) ([]byte, error) {
	v := reflect.ValueOf(m)
	if m == nil || (v.Kind() == reflect.Ptr && v.IsNil()) {
		return nil, errors.New("Marshal called with nil")
	}

	// Check for custom marshalers first since they may not properly
	// implement protobuf reflection that the logic below relies on.
	if jsm, ok := m.(JSONPBMarshaler); ok {
		return jsm.MarshalJSONPB(jm)
	}

	if wrapJSONMarshalV2 {
		opts := protojson.MarshalOptions{
			UseProtoNames:   jm.OrigName,
			UseEnumNumbers:  jm.EnumsAsInts,
			EmitUnpopulated: jm.EmitDefaults,
			Indent:          jm.Indent,
		}
		if jm.AnyResolver != nil {
			opts.Resolver = anyResolver{jm.AnyResolver}
		}
		return opts.Marshal(proto.MessageReflect(m).Interface())
	} else {
		// Check for unpopulated required fields first.
		m2 := proto.MessageReflect(m)
		if err := protoV2.CheckInitialized(m2.Interface()); err != nil {
			return nil, err
		}

		w := jsonWriter{Marshaler: jm}
		err := w.marshalMessage(m2, "", "")
		return w.buf, err
	}
}

type jsonWriter struct {
	*Marshaler