implement _serializable_encoders dictionary

mashumaro/serializer/base/dict.py

@@ -1,11 +1,14 @@
-from typing import Any, Dict, Mapping, Type, TypeVar, Optional
+from typing import Any, Dict, Mapping, Type, TypeVar, Optional, ClassVar
 
 from mashumaro.serializer.base.metaprogramming import CodeBuilder
+from mashumaro.types import SerializableEncoder
 
 T = TypeVar("T", bound="DataClassDictMixin")
 
 
 class DataClassDictMixin:
+ _serializable_encoders: ClassVar[Dict[Type, SerializableEncoder]] = {}
+
  def __init_subclass__(cls: Type[T], **kwargs):
  builder = CodeBuilder(cls)
  exc = None

mashumaro/serializer/base/metaprogramming.py

@@ -385,6 +385,8 @@ def _pack_value(
  f"self.__dataclass_fields__['{fname}'].type"
  f"._serialize({value_name})"
  )
+ if type_name(ftype) in self.cls._serializable_encoders:
+ return f"self._serializable_encoders['{type_name(ftype)}']._serialize({value_name})"
 
  origin_type = get_type_origin(ftype)
  if is_special_typing_primitive(origin_type):
@@ -586,6 +588,8 @@ def _unpack_field_value(
  f"cls.__dataclass_fields__['{fname}'].type"
  f"._deserialize({value_name})"
  )
+ if type_name(ftype) in self.cls._serializable_encoders:
+ return f"cls._serializable_encoders['{type_name(ftype)}']._deserialize({value_name})"
 
  origin_type = get_type_origin(ftype)
  if is_special_typing_primitive(origin_type):

mashumaro/types.py

@@ -1,5 +1,16 @@
 import decimal
+from typing import TypeVar, Generic
 
+TV = TypeVar("TV")
+
+class SerializableEncoder(Generic[TV]):
+ @classmethod
+ def _serialize(cls, value):
+ raise NotImplementedError
+
+ @classmethod
+ def _deserialize(cls, value):
+ raise NotImplementedError
 
 class SerializableType:
  def _serialize(self):