Package org.apache.sysds.runtime.compress.estim

Class CompressedSizeInfoColGroup

java.lang.Object

org.apache.sysds.runtime.compress.estim.CompressedSizeInfoColGroup

public class CompressedSizeInfoColGroup
extends Object

Information collected about a specific ColGroup's compression size.

Constructor Summary

Constructors

Constructor	Description
CompressedSizeInfoColGroup(IColIndex columns, int nRows)	Create empty.
CompressedSizeInfoColGroup(IColIndex cols, int nVal, int nRow, AColGroup.CompressionType bestCompressionType)
CompressedSizeInfoColGroup(IColIndex cols, EstimationFactors facts, long minSize, AColGroup.CompressionType bestCompressionType)
CompressedSizeInfoColGroup(IColIndex cols, EstimationFactors facts, AColGroup.CompressionType bestCompressionType)

Method Summary

Modifier and Type	Method	Description
void	clearMap()
boolean	containsZeros()
Map<AColGroup.CompressionType,Double>	getAllCompressionSizes()
AColGroup.CompressionType	getBestCompressionType()
AColGroup.CompressionType	getBestCompressionType(CompressionSettings cs)
IColIndex	getColumns()
double	getCompressionSize(AColGroup.CompressionType ct)
int	getLargestOffInstances()
IEncode	getMap()
double	getMinSize()
double	getMostCommonFraction()
int	getNumOffs()	Number of offsets, or number of non zero values.
int	getNumRows()
int	getNumVals()	Note cardinality is the same as number of distinct values.
double	getTupleSparsity()
boolean	isConst()
boolean	isEmpty()
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

CompressedSizeInfoColGroup

public CompressedSizeInfoColGroup(IColIndex cols,
                                  int nVal,
                                  int nRow,
                                  AColGroup.CompressionType bestCompressionType)

CompressedSizeInfoColGroup

public CompressedSizeInfoColGroup(IColIndex cols,
                                  EstimationFactors facts,
                                  AColGroup.CompressionType bestCompressionType)

CompressedSizeInfoColGroup

public CompressedSizeInfoColGroup(IColIndex cols,
                                  EstimationFactors facts,
                                  long minSize,
                                  AColGroup.CompressionType bestCompressionType)

CompressedSizeInfoColGroup

public CompressedSizeInfoColGroup(IColIndex columns,
                                  int nRows)

Create empty.

Parameters:

columns - columns

nRows - number of rows

Method Detail

getCompressionSize

public double getCompressionSize(AColGroup.CompressionType ct)

getBestCompressionType

public AColGroup.CompressionType getBestCompressionType(CompressionSettings cs)

getBestCompressionType

public AColGroup.CompressionType getBestCompressionType()

getAllCompressionSizes

public Map<AColGroup.CompressionType,Double> getAllCompressionSizes()

getMinSize

public double getMinSize()

getNumVals

public int getNumVals()

Note cardinality is the same as number of distinct values.

Returns:

cardinality or number of distinct values.

getNumOffs

public int getNumOffs()

Number of offsets, or number of non zero values.

Returns:

Number of non zeros or number of values.

getColumns

public IColIndex getColumns()

getNumRows

public int getNumRows()

getMostCommonFraction

public double getMostCommonFraction()

getLargestOffInstances

public int getLargestOffInstances()

getTupleSparsity

public double getTupleSparsity()

getMap

public IEncode getMap()

containsZeros

public boolean containsZeros()

isEmpty

public boolean isEmpty()

isConst

public boolean isConst()

clearMap

public void clearMap()

toString

public String toString()

Overrides:

toString in class Object