Package org.apache.sysds.runtime.compress.colgroup.indexes

Class AColIndex

java.lang.Object

org.apache.sysds.runtime.compress.colgroup.indexes.AColIndex

All Implemented Interfaces:

IColIndex

Direct Known Subclasses:

ArrayIndex, CombinedIndex, RangeIndex, SingleIndex, TwoIndex, TwoRangesIndex

public abstract class AColIndex
extends Object
implements IColIndex

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.sysds.runtime.compress.colgroup.indexes.IColIndex

IColIndex.ColIndexType, IColIndex.SliceResult

Constructor Summary

Constructors

Constructor	Description
AColIndex()

Method Summary

Modifier and Type	Method	Description
boolean	contains(IColIndex a, IColIndex b)	This contains method is not strict since it only verifies one element is contained from each a and b.
boolean	containsAny(IColIndex idx)	Analyze if this column group contain any of the given column Ids.
boolean	containsStrict(IColIndex a, IColIndex b)	This contains both a and b ...
void	decompressToDenseFromSparse(SparseBlock sb, int vr, int off, double[] c)	Decompress this column index into the dense c array.
void	decompressVec(int nCol, double[] c, int off, double[] values, int rowIdx)	Decompress into c using the values provided.
boolean	equals(Object other)
int	hashCode()

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.apache.sysds.runtime.compress.colgroup.indexes.IColIndex

avgOfIndex, combine, contains, equals, estimateInMemorySize, findIndex, get, getExactSizeOnDisk, getReorderingIndex, isContiguous, isSorted, iterator, shift, size, slice, sort, write

Constructor Detail

AColIndex

public AColIndex()

Method Detail

hashCode

public int hashCode()

Specified by:

hashCode in interface IColIndex

Overrides:

hashCode in class Object

equals

public boolean equals(Object other)

Specified by:

equals in interface IColIndex

Overrides:

equals in class Object

contains

public boolean contains(IColIndex a,
                        IColIndex b)

Description copied from interface: IColIndex

This contains method is not strict since it only verifies one element is contained from each a and b.

Specified by:

contains in interface IColIndex

Parameters:

a - one array to contain at least one value from

b - another array to contain at least one value from

Returns:

if the other arrays contain values from this array

containsStrict

public boolean containsStrict(IColIndex a,
                              IColIndex b)

Description copied from interface: IColIndex

This contains both a and b ... it is strict because it verifies all cells. Note it returns false if there are more elements in this than the sum of a and b.

Specified by:

containsStrict in interface IColIndex

Parameters:

a - one other array to contain

b - another array to contain

Returns:

if this array contains both a and b

containsAny

public boolean containsAny(IColIndex idx)

Description copied from interface: IColIndex

Analyze if this column group contain any of the given column Ids.

Specified by:

containsAny in interface IColIndex

Parameters:

idx - A List of indexes

Returns:

If it is contained

decompressToDenseFromSparse

public void decompressToDenseFromSparse(SparseBlock sb,
                                        int vr,
                                        int off,
                                        double[] c)

Description copied from interface: IColIndex

Decompress this column index into the dense c array.

Specified by:

decompressToDenseFromSparse in interface IColIndex

Parameters:

sb - A sparse block to extract values out of and insert into c

vr - The row to extract from the sparse block

off - The offset that the row starts at in c.

c - The dense output to decompress into

decompressVec

public void decompressVec(int nCol,
                          double[] c,
                          int off,
                          double[] values,
                          int rowIdx)

Description copied from interface: IColIndex

Decompress into c using the values provided. The offset to start into c is off and then row index is similarly the offset of values. nCol specify the number of values to add over.

Specified by:

decompressVec in interface IColIndex

Parameters:

nCol - The number of columns to copy.

c - The output to add into

off - The offset to start in c

values - the values to copy from

rowIdx - The offset to start in values