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

Interface ColIndexFactory

public interface ColIndexFactory

Field Summary

Fields

Modifier and Type	Field	Description
static org.apache.commons.logging.Log	LOG

Method Summary

Static Methods

Modifier and Type	Method	Description
static IColIndex	combine(List<AColGroup> gs)
static IColIndex	combine(AColGroup a, AColGroup b)
static IColIndex	combine(IColIndex a, IColIndex b)
static IColIndex	combineIndexes(List<IColIndex> idx)
static IColIndex	create(int nCol)
static IColIndex	create(int[] indexes)
static IColIndex	create(int l, int u)	Create an Index range of the given values
static IColIndex	create(IntArrayList indexes)
static IColIndex	createI(int... indexes)
static long	estimateMemoryCost(int nCol, boolean contiguous)
static IColIndex	getColumnMapping(IColIndex comb, IColIndex a)	Provide a mapping from a to the combined columns shifted over to column positions in the combined.
static IColIndex	read(DataInput in)

Field Detail

LOG

static final org.apache.commons.logging.Log LOG

Method Detail

read

static IColIndex read(DataInput in)
               throws IOException

Throws:

IOException

createI

static IColIndex createI(int... indexes)

create

static IColIndex create(int[] indexes)

create

static IColIndex create(IntArrayList indexes)

create

static IColIndex create(int l,
                        int u)

Create an Index range of the given values

Parameters:

l - Lower bound (inclusive)

u - Upper bound (not inclusive)

Returns:

An Index

create

static IColIndex create(int nCol)

estimateMemoryCost

static long estimateMemoryCost(int nCol,
                               boolean contiguous)

combine

static IColIndex combine(List<AColGroup> gs)

combineIndexes

static IColIndex combineIndexes(List<IColIndex> idx)

combine

static IColIndex combine(AColGroup a,
                         AColGroup b)

combine

static IColIndex combine(IColIndex a,
                         IColIndex b)

getColumnMapping

static IColIndex getColumnMapping(IColIndex comb,
                                  IColIndex a)

Provide a mapping from a to the combined columns shifted over to column positions in the combined. It is assumed that the caller always input an a that is contained in comb. it is not verified in the call that it is correct.

Parameters:

comb - The combined indexes

a - The indexes to look up

Returns:

A column index mapping.