src/main/java/org/apache/sysds/runtime/compress/cocode/ColumnGroupPartitioner.java

/*
 * 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.
 */

package org.apache.sysds.runtime.compress.cocode;

import java.util.HashMap;
import java.util.List;

import org.apache.sysds.runtime.compress.CompressionSettings;
import org.apache.sysds.runtime.compress.cocode.PlanningCoCoder.GroupableColInfo;

public abstract class ColumnGroupPartitioner {
	/**
	 * Partitions a list of columns into a list of partitions that contains subsets of columns. Note that this call must
	 * compute a complete and disjoint partitioning.
	 * 
	 * @param groupCols     list of columns
	 * @param groupColsInfo list of column infos
	 * @param cs            The Compression settings used for the compression
	 * @return list of partitions (where each partition is a list of columns)
	 */
	public abstract List<int[]> partitionColumns(List<Integer> groupCols,
		HashMap<Integer, GroupableColInfo> groupColsInfo, CompressionSettings cs);
}