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/*
 *  Copyright (c) 2017 Uber Technologies, Inc. ([email protected])
 *
 *  Licensed 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.
 *
 *
 */

package com.uber.hoodie.hive;

import java.io.Serializable;
import java.util.List;

/**
 * HDFS Path contain hive partition values for the keys it is partitioned on. This mapping is not
 * straight forward and requires a pluggable implementation to extract the partition value from HDFS
 * path.
 * 
 * e.g. Hive table partitioned by datestr=yyyy-mm-dd and hdfs path
 * /app/hoodie/dataset1/YYYY=[yyyy]/MM=[mm]/DD=[dd]
 */
public interface PartitionValueExtractor extends Serializable {

  List extractPartitionValuesInPath(String partitionPath);
}