org.apache.sysds.runtime.compress.utils

Class ABitmap

java.lang.Object

org.apache.sysds.runtime.compress.utils.ABitmap

Direct Known Subclasses:

Bitmap, BitmapLossy

public abstract class ABitmap
extends Object

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ABitmap.BitmapType

Constructor Summary

Constructors

Constructor and Description
ABitmap(int numCols, IntArrayList[] offsetsLists, int numZeroGroups)

Method Summary

Modifier and Type	Method and Description
boolean	containsZero()
int	getNumColumns()
long	getNumOffsets()
int	getNumOffsets(int ix)
abstract int	getNumValues() Obtain number of distinct value groups in the column.
IntArrayList[]	getOffsetList()
IntArrayList	getOffsetsList(int idx)
abstract ABitmap.BitmapType	getType()
int	getZeroCounts()
abstract void	sortValuesByFrequency()
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

ABitmap

public ABitmap(int numCols,
               IntArrayList[] offsetsLists,
               int numZeroGroups)

Method Detail

getNumColumns

public int getNumColumns()

getNumValues

public abstract int getNumValues()

Obtain number of distinct value groups in the column. this number is also the number of bitmaps, since there is one bitmap per value

Returns:

number of distinct value groups in the column;

getOffsetList

public IntArrayList[] getOffsetList()

getOffsetsList

public IntArrayList getOffsetsList(int idx)

getNumOffsets

public long getNumOffsets()

getNumOffsets

public int getNumOffsets(int ix)

sortValuesByFrequency

public abstract void sortValuesByFrequency()

containsZero

public boolean containsZero()

getZeroCounts

public int getZeroCounts()

getType

public abstract ABitmap.BitmapType getType()

toString

public String toString()

Overrides:

toString in class Object