1 files changed, 19 insertions, 0 deletions
diff --git a/rag/generator/abstract.py b/rag/generator/abstract.py
new file mode 100644
index 0000000..a53b5d8
--- /dev/null
+++ b/rag/generator/abstract.py
@@ -0,0 +1,19 @@
+from abc import ABC, abstractmethod
+
+from typing import Any, Generator
+
+from .prompt import Prompt
+
+
+class AbstractGenerator(ABC, type):
+    _instances = {}
+
+    def __call__(cls, *args, **kwargs):
+        if cls not in cls._instances:
+            instance = super().__call__(*args, **kwargs)
+            cls._instances[cls] = instance
+        return cls._instances[cls]
+
+    @abstractmethod
+    def generate(self, prompt: Prompt) -> Generator[Any, Any, Any]:
+        pass