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

Class EmptyScheme

java.lang.Object

org.apache.sysds.runtime.compress.colgroup.scheme.EmptyScheme

All Implemented Interfaces:

ICLAScheme

public class EmptyScheme
extends Object
implements ICLAScheme

Field Summary

Fields inherited from interface org.apache.sysds.runtime.compress.colgroup.scheme.ICLAScheme

LOG

Method Summary

Modifier and Type	Method	Description
static EmptyScheme	create(ColGroupEmpty g)
AColGroup	encode(MatrixBlock data)	Encode the given matrix block into the scheme provided in the instance.
AColGroup	encode(MatrixBlock data, IColIndex columns)	Encode a given matrix block into the scheme provided in the instance but overwrite what columns to use.

Methods inherited from class java.lang.Object

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

Method Detail

create

public static EmptyScheme create(ColGroupEmpty g)

encode

public AColGroup encode(MatrixBlock data)

Description copied from interface: ICLAScheme

Encode the given matrix block into the scheme provided in the instance. The method returns null, if it is impossible to encode the input data with the given scheme.

Specified by:

encode in interface ICLAScheme

Parameters:

data - The data to encode

Returns:

A compressed column group or null.

encode

public AColGroup encode(MatrixBlock data,
                        IColIndex columns)

Description copied from interface: ICLAScheme

Encode a given matrix block into the scheme provided in the instance but overwrite what columns to use. The method returns null, if it is impossible to encode the input data with the given scheme.

Specified by:

encode in interface ICLAScheme

Parameters:

data - The data to encode

columns - The columns to apply the scheme to, but must be of same number than the encoded scheme

Returns:

A compressed column group or null