flink-ml-python/pyflink/ml/stats/common.py

################################################################################
#  Licensed to the Apache Software Foundation (ASF) under one
#  or more contributor license agreements.  See the NOTICE file
#  distributed with this work for additional information
#  regarding copyright ownership.  The ASF licenses this file
#  to you under the Apache License, Version 2.0 (the
#  "License"); you may not use this file except in compliance
#  with the License.  You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
#  Unless required by applicable law or agreed to in writing, software
#  distributed under the License is distributed on an "AS IS" BASIS,
#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#  See the License for the specific language governing permissions and
# limitations under the License.
################################################################################
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