컨테이너 인터페이스 구현

src/appl/i_container.py

@@ -0,0 +1,39 @@
+from __future__ import annotations
+
+import abc
+import inspect
+from typing import Any, Type, TypeVar
+
+T = TypeVar("T")
+
+
+class IContainer(abc.ABC):
+    def __init__(self) -> None:
+        self.obj_map = {}
+
+    def register(self, obj: Any) -> None:
+        self.obj_map[type(obj)] = obj
+
+    def resolve(self, type_: Type[T]) -> T:
+        impl_type = type_
+        if inspect.isabstract(type_):
+            impl_types = type_.__subclasses__()
+            if len(impl_types) == 0:
+                raise NotRegisteredTypeError(f"type: {type_}")
+
+            impl_type = impl_types[0]
+
+        try:
+            obj = self.obj_map[impl_type]
+        except KeyError:
+            raise NotRegisteredTypeError(f"type: {type_}")
+
+        return obj
+
+    @abc.abstractmethod
+    def compose(self) -> None:
+        pass
+
+
+class NotRegisteredTypeError(Exception):
+    pass