Initial v2 version, better testing, updates

encoder/binary.go

@@ -0,0 +1,32 @@
+package encoder
+
+func EncodeValue(encoder Encoder, val any) ([]byte, error) {
+	var v []byte
+
+	if b, ok := val.([]byte); ok {
+		v = b
+	} else if s, ok := val.(string); ok {
+		b = []byte(s)
+	} else {
+		return encoder.Marshal(val)
+	}
+
+	return v, nil
+}
+
+func DecodeValue(encoder Encoder, b []byte, v any) error {
+	switch v := v.(type) {
+	case *[]byte:
+		if v != nil {
+			*v = b
+			return nil
+		}
+	case *string:
+		if v != nil {
+			*v = string(b)
+			return nil
+		}
+	}
+
+	return encoder.Unmarshal(b, v)
+}

encoder/encoding.go

@@ -0,0 +1,66 @@
+package encoder
+
+import (
+	"encoding/json"
+	"encoding/xml"
+	"github.com/vmihailenco/msgpack/v4"
+)
+
+var (
+	XML     xmlEncoder
+	JSON    jsonEncoder
+	MsgPack msgPackEncoder
+)
+
+func EncoderFrom(name string) Encoder {
+	var enc Encoder
+
+	switch name {
+	case "json":
+		enc = JSON
+	case "xml":
+		enc = XML
+	default: // Default is also msgpack
+		enc = MsgPack
+	}
+
+	return enc
+}
+
+type Encoder interface {
+	Unmarshal(b []byte, dest any) error
+	Marshal(value any) ([]byte, error)
+}
+
+type jsonEncoder struct {
+}
+
+func (j jsonEncoder) Marshal(value any) ([]byte, error) {
+	return json.Marshal(value)
+}
+
+func (j jsonEncoder) Unmarshal(b []byte, dest any) error {
+	return json.Unmarshal(b, dest)
+}
+
+type msgPackEncoder struct {
+}
+
+func (m msgPackEncoder) Marshal(value any) ([]byte, error) {
+	return msgpack.Marshal(value)
+}
+
+func (m msgPackEncoder) Unmarshal(b []byte, dest any) error {
+	return msgpack.Unmarshal(b, dest)
+}
+
+type xmlEncoder struct {
+}
+
+func (x xmlEncoder) Marshal(value any) ([]byte, error) {
+	return xml.Marshal(value)
+}
+
+func (x xmlEncoder) Unmarshal(b []byte, dest any) error {
+	return xml.Unmarshal(b, dest)
+}