grpc/codec/codec.go

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package codec
import (
"fmt"
"google.golang.org/protobuf/proto"
)
// Name is the name registered for the proto compressor.
const Name = "proto"
type Codec struct{}
type vtprotoMessage interface {
MarshalVT() ([]byte, error)
UnmarshalVT([]byte) error
}
type protoMessage interface {
Marshal() ([]byte, error)
Unmarshal([]byte) error
}
func (Codec) Marshal(v interface{}) ([]byte, error) {
switch m := v.(type) {
case vtprotoMessage:
return m.MarshalVT()
case protoMessage:
return m.Marshal()
case proto.Message:
return proto.Marshal(m)
default:
return nil, fmt.Errorf("failed to marshal, message is %T, want proto.Message", v)
}
}
func (Codec) Unmarshal(data []byte, v interface{}) error {
switch m := v.(type) {
case vtprotoMessage:
return m.UnmarshalVT(data)
case protoMessage:
return m.Unmarshal(data)
case proto.Message:
return proto.Unmarshal(data, m)
default:
return fmt.Errorf("failed to unmarshal, message is %T, want proto.Message", v)
}
}
func (Codec) Name() string {
return Name
}