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

Class SingleIndex

java.lang.Object

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

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

All Implemented Interfaces:

IColIndex

public class SingleIndex
extends AColIndex

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
SingleIndex(int idx)

Method Summary

Modifier and Type	Method	Description
IColIndex	combine(IColIndex other)	combine the indexes of this colIndex with another, it is expected that all calls to this contains unique indexes, and no copies of values.
boolean	equals(IColIndex other)
long	estimateInMemorySize()	Get the in memory size of this object.
static long	estimateInMemorySizeStatic()
int	findIndex(int i)	Find the index of the value given return negative if non existing.
int	get(int i)	Get the index at a specific location, Note that many of the underlying implementations does not throw exceptions on indexes that are completely wrong, so all implementations that use this index should always be well behaved.
long	getExactSizeOnDisk()	Get the exact size on disk to enable preallocation of the disk output buffer sizes
boolean	isContiguous()	Get if these columns are contiguous, meaning all indexes are integers at increments of 1.
IIterate	iterator()	A Iterator of the indexes see the iterator interface for details.
SingleIndex	shift(int i)	Return a new column index where the values are shifted by the specified amount.
int	size()	Get the size of the index aka, how many columns is contained
IColIndex.SliceResult	slice(int l, int u)
String	toString()
void	write(DataOutput out)	Write out the IO representation of this column index

Methods inherited from class org.apache.sysds.runtime.compress.colgroup.indexes.AColIndex

contains, containsStrict, equals, hashCode

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

SingleIndex

public SingleIndex(int idx)

Method Detail

size

public int size()

Description copied from interface: IColIndex

Get the size of the index aka, how many columns is contained

Returns:

The size of the array

get

public int get(int i)

Description copied from interface: IColIndex

Get the index at a specific location, Note that many of the underlying implementations does not throw exceptions on indexes that are completely wrong, so all implementations that use this index should always be well behaved.

Parameters:

i - The index to get

Returns:

the column index at the index.

shift

public SingleIndex shift(int i)

Description copied from interface: IColIndex

Return a new column index where the values are shifted by the specified amount. It is returning a new instance of the index.

Parameters:

i - The amount to shift

Returns:

the new instance of an index.

iterator

public IIterate iterator()

Description copied from interface: IColIndex

A Iterator of the indexes see the iterator interface for details.

Returns:

A iterator for the indexes contained.

write

public void write(DataOutput out)
           throws IOException

Description copied from interface: IColIndex

Write out the IO representation of this column index

Parameters:

out - The Output to write into

Throws:

IOException - IO exceptions in case of for instance not enough disk space

getExactSizeOnDisk

public long getExactSizeOnDisk()

Description copied from interface: IColIndex

Get the exact size on disk to enable preallocation of the disk output buffer sizes

Returns:

The exact disk representation size

estimateInMemorySize

public long estimateInMemorySize()

Description copied from interface: IColIndex

Get the in memory size of this object.

Returns:

The memory size of this object

estimateInMemorySizeStatic

public static long estimateInMemorySizeStatic()

findIndex

public int findIndex(int i)

Description copied from interface: IColIndex

Find the index of the value given return negative if non existing.

Parameters:

i - the value to find inside the allocation

Returns:

The index of the value.

slice

public IColIndex.SliceResult slice(int l,
                                   int u)

equals

public boolean equals(IColIndex other)

combine

public IColIndex combine(IColIndex other)

Description copied from interface: IColIndex

combine the indexes of this colIndex with another, it is expected that all calls to this contains unique indexes, and no copies of values.

Parameters:

other - The other array

Returns:

The combined array

isContiguous

public boolean isContiguous()

Description copied from interface: IColIndex

Get if these columns are contiguous, meaning all indexes are integers at increments of 1. ex: 1,2,3,4,5,6 is contiguous 1,3,4 is not.

Returns:

If the Columns are contiguous.

toString

public String toString()

Overrides:

toString in class Object