Add Amazon Kendra Retriver

src/backend/langflow/components/retrievers/AmazonKendra.py

@@ -0,0 +1,27 @@
+from langflow import CustomComponent
+from langchain.retrievers import AmazonKendraRetriever
+from langchain.schema import BaseRetriever
+
+
+class AmazonKendraRetrieverComponent(CustomComponent):
+    display_name: str = "Amazon Kendra Retriever"
+    description: str = "Retriever that uses the Amazon Kendra API."
+
+    def build_config(self):
+        return {
+            "index_id": {"display_name": "Index ID"},
+            "attribute_filter": {
+                "attribute_filter": "Attribute Filter",
+                "field_type": "code",
+            },
+            "code": {"show": False},
+        }
+
+    def build(
+        self, index_id: str, attribute_filter: dict
+    ) -> BaseRetriever:
+        try:
+            output = AmazonKendraRetriever(index_id=index_id, attribute_filter=attribute_filter)
+        except Exception as e:
+            raise ValueError("Could not connect to AmazonKendra API.") from e
+        return output