Package org.apache.sysds.runtime.transform.encode

Class ColumnEncoderComposite

java.lang.Object

org.apache.sysds.runtime.transform.encode.ColumnEncoder

org.apache.sysds.runtime.transform.encode.ColumnEncoderComposite

All Implemented Interfaces:

Externalizable, Serializable, Comparable<ColumnEncoder>, Encoder

public class ColumnEncoderComposite
extends ColumnEncoder

Simple composite encoder that applies a list of encoders in specified order. By implementing the default encoder API it can be used as a drop-in replacement for any other encoder.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.sysds.runtime.transform.encode.ColumnEncoder

ColumnEncoder.EncoderType

Field Summary

Fields inherited from class org.apache.sysds.runtime.transform.encode.ColumnEncoder

APPLY_ROW_BLOCKS_PER_COLUMN, BUILD_ROW_BLOCKS_PER_COLUMN

Constructor Summary

Constructors

Constructor	Description
ColumnEncoderComposite()
ColumnEncoderComposite(List<ColumnEncoder> columnEncoders)
ColumnEncoderComposite(List<ColumnEncoder> columnEncoders, FrameBlock meta)
ColumnEncoderComposite(ColumnEncoder columnEncoder)

Method Summary

Modifier and Type	Method	Description
void	addEncoder(ColumnEncoder other)
void	allocateMetaData(FrameBlock meta)	Pre-allocate a FrameBlock for metadata collection.
MatrixBlock	apply(CacheBlock in, MatrixBlock out, int outputCol, int rowStart, int blk)
void	build(CacheBlock in)	Build the transform meta data for the given block input.
void	build(CacheBlock in, Map<Integer,double[]> equiHeightMaxs)
void	buildPartial(FrameBlock in)	Partial build of internal data structures (e.g., in distributed spark operations).
void	computeRCDMapSizeEstimate(CacheBlock in, int[] sampleIndices)
boolean	equals(Object o)
List<DependencyTask<?>>	getApplyTasks(CacheBlock in, MatrixBlock out, int outputCol)
List<DependencyTask<?>>	getBuildTasks(CacheBlock in)
<T extends ColumnEncoder> T	getEncoder(Class<T> type)
List<ColumnEncoder>	getEncoders()
FrameBlock	getMetaData(FrameBlock out)	Construct a frame block out of the transform meta data.
Set<Integer>	getSparseRowsWZeros()
<T extends ColumnEncoder> boolean	hasBuild()
<T extends ColumnEncoder> boolean	hasEncoder(Class<T> type)
int	hashCode()
void	initMetaData(FrameBlock out)	Sets up the required meta data for a subsequent call to apply.
boolean	isEncoder(int colID, Class<?> type)
void	mergeAt(ColumnEncoder other)	Merges another encoder, of a compatible type, in after a certain position.
void	prepareBuildPartial()	Allocates internal data structures for partial build.
void	readExternal(ObjectInput in)	Redirects the default java serialization via externalizable to our default hadoop writable serialization for efficient broadcast/rdd deserialization.
void	setNumPartitions(int nBuild, int nApply)
void	shiftCol(int columnOffset)
String	toString()
void	updateAllDCEncoders()
void	updateIndexRanges(long[] beginDims, long[] endDims, int colOffset)	Update index-ranges to after encoding.
void	writeExternal(ObjectOutput out)	Redirects the default java serialization via externalizable to our default hadoop writable serialization for efficient broadcast/rdd serialization.

Methods inherited from class org.apache.sysds.runtime.transform.encode.ColumnEncoder

apply, build, compareTo, getBuildTask, getColID, getColMapping, getEstMetaSize, getEstNumDistincts, getPartialBuildTask, getPartialMergeBuildTask, isApplicable, isApplicable, setColID, setEstMetaSize, setEstNumDistincts

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

ColumnEncoderComposite

public ColumnEncoderComposite()

ColumnEncoderComposite

public ColumnEncoderComposite(List<ColumnEncoder> columnEncoders,
                              FrameBlock meta)

ColumnEncoderComposite

public ColumnEncoderComposite(List<ColumnEncoder> columnEncoders)

ColumnEncoderComposite

public ColumnEncoderComposite(ColumnEncoder columnEncoder)

Method Detail

getEncoders

public List<ColumnEncoder> getEncoders()

getEncoder

public <T extends ColumnEncoder> T getEncoder(Class<T> type)

isEncoder

public boolean isEncoder(int colID,
                         Class<?> type)

build

public void build(CacheBlock in)

Description copied from interface: Encoder

Build the transform meta data for the given block input. This call modifies and keeps meta data as encoder state.

Parameters:

in - input frame block

build

public void build(CacheBlock in,
                  Map<Integer,double[]> equiHeightMaxs)

Overrides:

build in class ColumnEncoder

getApplyTasks

public List<DependencyTask<?>> getApplyTasks(CacheBlock in,
                                             MatrixBlock out,
                                             int outputCol)

Overrides:

getApplyTasks in class ColumnEncoder

getBuildTasks

public List<DependencyTask<?>> getBuildTasks(CacheBlock in)

Overrides:

getBuildTasks in class ColumnEncoder

prepareBuildPartial

public void prepareBuildPartial()

Description copied from class: ColumnEncoder

Allocates internal data structures for partial build.

Specified by:

prepareBuildPartial in interface Encoder

Overrides:

prepareBuildPartial in class ColumnEncoder

buildPartial

public void buildPartial(FrameBlock in)

Description copied from class: ColumnEncoder

Partial build of internal data structures (e.g., in distributed spark operations).

Specified by:

buildPartial in interface Encoder

Overrides:

buildPartial in class ColumnEncoder

Parameters:

in - input frame block

apply

public MatrixBlock apply(CacheBlock in,
                         MatrixBlock out,
                         int outputCol,
                         int rowStart,
                         int blk)

Overrides:

apply in class ColumnEncoder

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

mergeAt

public void mergeAt(ColumnEncoder other)

Description copied from class: ColumnEncoder

Merges another encoder, of a compatible type, in after a certain position. Resizes as necessary. ColumnEncoders are compatible with themselves and EncoderComposite is compatible with every other ColumnEncoders. MultiColumnEncoders are compatible with every encoder

Overrides:

mergeAt in class ColumnEncoder

Parameters:

other - the encoder that should be merged in

updateAllDCEncoders

public void updateAllDCEncoders()

addEncoder

public void addEncoder(ColumnEncoder other)

updateIndexRanges

public void updateIndexRanges(long[] beginDims,
                              long[] endDims,
                              int colOffset)

Description copied from class: ColumnEncoder

Update index-ranges to after encoding. Note that only Dummycoding changes the ranges.

Specified by:

updateIndexRanges in interface Encoder

Overrides:

updateIndexRanges in class ColumnEncoder

Parameters:

beginDims - begin dimensions of range

endDims - end dimensions of range

colOffset - is applied to begin and endDims

allocateMetaData

public void allocateMetaData(FrameBlock meta)

Description copied from interface: Encoder

Pre-allocate a FrameBlock for metadata collection.

Parameters:

meta - frame block

getMetaData

public FrameBlock getMetaData(FrameBlock out)

Description copied from interface: Encoder

Construct a frame block out of the transform meta data.

Parameters:

out - output frame block

Returns:

output frame block?

initMetaData

public void initMetaData(FrameBlock out)

Description copied from interface: Encoder

Sets up the required meta data for a subsequent call to apply.

Parameters:

out - frame block

toString

public String toString()

Overrides:

toString in class Object

writeExternal

public void writeExternal(ObjectOutput out)
                   throws IOException

Description copied from class: ColumnEncoder

Redirects the default java serialization via externalizable to our default hadoop writable serialization for efficient broadcast/rdd serialization.

Specified by:

writeExternal in interface Externalizable

Overrides:

writeExternal in class ColumnEncoder

Parameters:

out - object output

Throws:

IOException - if IOException occurs

readExternal

public void readExternal(ObjectInput in)
                  throws IOException

Description copied from class: ColumnEncoder

Redirects the default java serialization via externalizable to our default hadoop writable serialization for efficient broadcast/rdd deserialization.

Specified by:

readExternal in interface Externalizable

Overrides:

readExternal in class ColumnEncoder

Parameters:

in - object input

Throws:

IOException - if IOException occur

hasEncoder

public <T extends ColumnEncoder> boolean hasEncoder(Class<T> type)

hasBuild

public <T extends ColumnEncoder> boolean hasBuild()

computeRCDMapSizeEstimate

public void computeRCDMapSizeEstimate(CacheBlock in,
                                      int[] sampleIndices)

setNumPartitions

public void setNumPartitions(int nBuild,
                             int nApply)

shiftCol

public void shiftCol(int columnOffset)

Overrides:

shiftCol in class ColumnEncoder

getSparseRowsWZeros

public Set<Integer> getSparseRowsWZeros()

Overrides:

getSparseRowsWZeros in class ColumnEncoder