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#
#   http://www.apache.org/licenses/LICENSE-2.0
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from __future__ import annotations

from abc import ABC, abstractmethod
from typing import TYPE_CHECKING, Any

if TYPE_CHECKING:
    from collections.abc import Iterable


class PartitionMapper(ABC):
    """
    Base partition mapper class.

    Maps keys from asset events to target dag run partitions.
    """

    @abstractmethod
    def to_downstream(self, key: str) -> str | Iterable[str]:
        """Return the target key that the given source partition key maps to."""

    def serialize(self) -> dict[str, Any]:
        return {}

    @classmethod
    def deserialize(cls, data: dict[str, Any]) -> PartitionMapper:
        return cls()
