| |
| |
| |
|
|
| from typing import Any, Dict |
|
|
| from haystack.core.errors import DeserializationError, SerializationError |
| from haystack.core.serialization import generate_qualified_class_name, import_class_by_name |
|
|
|
|
| def serialize_class_instance(obj: Any) -> Dict[str, Any]: |
| """ |
| Serializes an object that has a `to_dict` method into a dictionary. |
| |
| :param obj: |
| The object to be serialized. |
| :returns: |
| A dictionary representation of the object. |
| :raises SerializationError: |
| If the object does not have a `to_dict` method. |
| """ |
| if not hasattr(obj, "to_dict"): |
| raise SerializationError(f"Object of class '{type(obj).__name__}' does not have a 'to_dict' method") |
|
|
| output = obj.to_dict() |
| return {"type": generate_qualified_class_name(type(obj)), "data": output} |
|
|
|
|
| def deserialize_class_instance(data: Dict[str, Any]) -> Any: |
| """ |
| Deserializes an object from a dictionary representation generated by `auto_serialize_class_instance`. |
| |
| :param data: |
| The dictionary to deserialize from. |
| :returns: |
| The deserialized object. |
| :raises DeserializationError: |
| If the serialization data is malformed, the class type cannot be imported, or the |
| class does not have a `from_dict` method. |
| """ |
| if "type" not in data: |
| raise DeserializationError("Missing 'type' in serialization data") |
| if "data" not in data: |
| raise DeserializationError("Missing 'data' in serialization data") |
|
|
| try: |
| obj_class = import_class_by_name(data["type"]) |
| except ImportError as e: |
| raise DeserializationError(f"Class '{data['type']}' not correctly imported") from e |
|
|
| if not hasattr(obj_class, "from_dict"): |
| raise DeserializationError(f"Class '{data['type']}' does not have a 'from_dict' method") |
|
|
| return obj_class.from_dict(data["data"]) |
|
|
