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from abc import ABC, abstractmethod

from pyflink.ml.wrapper import JavaAlgoOperator

JAVA_STATS_PACKAGE_NAME = "org.apache.flink.ml.stats"


class JavaStatsAlgoOperator(JavaAlgoOperator, ABC):
    """
    Wrapper class for a Java Stats AlgoOperator.
    """

    def __init__(self, java_algo_operator):
        super(JavaStatsAlgoOperator, self).__init__(java_algo_operator)

    @classmethod
    def _java_stage_path(cls) -> str:
        return ".".join(
            [JAVA_STATS_PACKAGE_NAME,
             cls._java_algo_operator_package_name(),
             cls._java_algo_operator_class_name()])

    @classmethod
    @abstractmethod
    def _java_algo_operator_package_name(cls) -> str:
        pass

    @classmethod
    @abstractmethod
    def _java_algo_operator_class_name(cls) -> str:
        pass