ColumnGroupPartitioner.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
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 * 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
 * 
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package org.apache.sysml.runtime.compress.cocode;

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

import org.apache.sysml.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
	 * @return list of partitions (where each partition is a list of columns)
	 */
	public abstract List<List<Integer>> partitionColumns(List<Integer> groupCols, HashMap<Integer, GroupableColInfo> groupColsInfo);
}