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- package runtime
- import (
- "errors"
- "io"
- "google.golang.org/protobuf/proto"
- )
- // ProtoMarshaller is a Marshaller which marshals/unmarshals into/from serialize proto bytes
- type ProtoMarshaller struct{}
- // ContentType always returns "application/octet-stream".
- func (*ProtoMarshaller) ContentType(_ interface{}) string {
- return "application/octet-stream"
- }
- // Marshal marshals "value" into Proto
- func (*ProtoMarshaller) Marshal(value interface{}) ([]byte, error) {
- message, ok := value.(proto.Message)
- if !ok {
- return nil, errors.New("unable to marshal non proto field")
- }
- return proto.Marshal(message)
- }
- // Unmarshal unmarshals proto "data" into "value"
- func (*ProtoMarshaller) Unmarshal(data []byte, value interface{}) error {
- message, ok := value.(proto.Message)
- if !ok {
- return errors.New("unable to unmarshal non proto field")
- }
- return proto.Unmarshal(data, message)
- }
- // NewDecoder returns a Decoder which reads proto stream from "reader".
- func (marshaller *ProtoMarshaller) NewDecoder(reader io.Reader) Decoder {
- return DecoderFunc(func(value interface{}) error {
- buffer, err := io.ReadAll(reader)
- if err != nil {
- return err
- }
- return marshaller.Unmarshal(buffer, value)
- })
- }
- // NewEncoder returns an Encoder which writes proto stream into "writer".
- func (marshaller *ProtoMarshaller) NewEncoder(writer io.Writer) Encoder {
- return EncoderFunc(func(value interface{}) error {
- buffer, err := marshaller.Marshal(value)
- if err != nil {
- return err
- }
- if _, err := writer.Write(buffer); err != nil {
- return err
- }
- return nil
- })
- }
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