org.apache.sysds.runtime.compress.cocode

Class ColumnGroupPartitioner

java.lang.Object

org.apache.sysds.runtime.compress.cocode.ColumnGroupPartitioner

Direct Known Subclasses:

ColumnGroupPartitionerBinPacking, ColumnGroupPartitionerStatic

public abstract class ColumnGroupPartitioner
extends Object

Constructor Summary

Constructors

Constructor and Description
ColumnGroupPartitioner()

Method Summary

Modifier and Type	Method and Description
abstract List<int[]>	partitionColumns(List<Integer> groupCols, HashMap<Integer,PlanningCoCoder.GroupableColInfo> groupColsInfo, CompressionSettings cs) Partitions a list of columns into a list of partitions that contains subsets of columns.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ColumnGroupPartitioner

public ColumnGroupPartitioner()

Method Detail

partitionColumns

public abstract List<int[]> partitionColumns(List<Integer> groupCols,
                                             HashMap<Integer,PlanningCoCoder.GroupableColInfo> groupColsInfo,
                                             CompressionSettings cs)

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.

Parameters:

groupCols - list of columns

groupColsInfo - list of column infos

cs - The Compression settings used for the compression

Returns:

list of partitions (where each partition is a list of columns)