Package adams.multiprocess

Class WekaCrossValidationJob

java.lang.Object

adams.core.logging.LoggingObject

adams.multiprocess.AbstractJob

adams.multiprocess.WekaCrossValidationJob

All Implemented Interfaces:

CleanUpHandler, LoggingSupporter, SizeOfHandler, Stoppable, StoppableWithFeedback, FlowContextHandler, Job, Serializable

public class WekaCrossValidationJob
extends AbstractJob
implements FlowContextHandler

For evaluation of a single train/test fold in parallel.

Author:

fracpete (fracpete at waikato dot ac dot nz)

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
protected weka.classifiers.Classifier	m_Classifier	the classifier to evaluate.
protected boolean	m_DiscardPredictions	whether to discard the predictions.
protected weka.classifiers.Evaluation	m_Evaluation	the evaluation.
protected Actor	m_FlowContext	the flow context.
protected int	m_Fold	the fold.
protected StatusMessageHandler	m_StatusMessageHandler	for outputting notifications.
protected weka.core.Instances	m_Test	the test set.
protected weka.core.Instances	m_Train	the training set.

Fields inherited from class adams.multiprocess.AbstractJob

m_Complete, m_ExecutionError, m_JobCompleteListener, m_JobInfo, m_Stopped

Fields inherited from class adams.core.logging.LoggingObject

m_Logger, m_LoggingIsEnabled, m_LoggingLevel

Constructor Summary

Constructors

Constructor	Description
WekaCrossValidationJob(weka.classifiers.Classifier classifier, weka.core.Instances train, weka.core.Instances test, int fold, boolean discardPred)	Initializes the job.
WekaCrossValidationJob(weka.classifiers.Classifier classifier, weka.core.Instances train, weka.core.Instances test, int fold, boolean discardPred, StatusMessageHandler handler)	Initializes the job.

Method Summary

Modifier and Type	Method	Description
void	cleanUp()	Cleans up data structures, frees up memory.
weka.classifiers.Classifier	getClassifier()	Returns the classifier (should be built after the job finished).
boolean	getDiscardPredictions()	Returns whether the predictions are discarded.
weka.classifiers.Evaluation	getEvaluation()	Returns the generated evaluation object.
Actor	getFlowContext()	Returns the flow context, if any.
int	getFold()	Returns the fold index.
StatusMessageHandler	getStatusMessageHandler()	Returns the status message handler.
weka.core.Instances	getTest()	Returns the test set.
weka.core.Instances	getTrain()	Returns the training set.
protected String	postProcessCheck()	Checks whether all post-conditions have been met.
protected String	preProcessCheck()	Checks whether all pre-conditions have been met.
protected void	process()	Does the actual execution of the job.
void	setFlowContext(Actor value)	Sets the flow context.
String	toString()	Returns a string representation of this job.

Methods inherited from class adams.multiprocess.AbstractJob

execute, getAdditionalErrorInformation, getExecutionError, getJobCompleteListener, getJobInfo, hasExecutionError, isComplete, isStopped, jobCompleted, setJobCompleteListener, setJobInfo, stopExecution

Methods inherited from class adams.core.logging.LoggingObject

configureLogger, getLogger, getLoggingLevel, initializeLogging, isLoggingEnabled, sizeOf

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface adams.core.logging.LoggingSupporter

getLogger, isLoggingEnabled

Field Detail

m_Classifier

protected weka.classifiers.Classifier m_Classifier

the classifier to evaluate.

m_Fold

protected int m_Fold

the fold.

m_Train

protected weka.core.Instances m_Train

the training set.

m_Test

protected weka.core.Instances m_Test

the test set.

m_DiscardPredictions

protected boolean m_DiscardPredictions

whether to discard the predictions.

m_Evaluation

protected weka.classifiers.Evaluation m_Evaluation

the evaluation.

m_StatusMessageHandler

protected transient StatusMessageHandler m_StatusMessageHandler

for outputting notifications.

m_FlowContext

protected transient Actor m_FlowContext

the flow context.

Constructor Detail

WekaCrossValidationJob

public WekaCrossValidationJob(weka.classifiers.Classifier classifier,
                              weka.core.Instances train,
                              weka.core.Instances test,
                              int fold,
                              boolean discardPred)

Initializes the job.

Parameters:

classifier - the classifier to evaluate

train - the training set

test - the test set

fold - the fold index

discardPred - whether to discard the predictions

WekaCrossValidationJob

public WekaCrossValidationJob(weka.classifiers.Classifier classifier,
                              weka.core.Instances train,
                              weka.core.Instances test,
                              int fold,
                              boolean discardPred,
                              StatusMessageHandler handler)

Initializes the job.

Parameters:

classifier - the classifier to evaluate

train - the training set

test - the test set

fold - the fold index

discardPred - whether to discard the predictions

handler - for displaying notifications, can be null

Method Detail

setFlowContext

public void setFlowContext(Actor value)

Sets the flow context.

Specified by:

setFlowContext in interface FlowContextHandler

Parameters:

value - the actor

getFlowContext

public Actor getFlowContext()

Returns the flow context, if any.

Specified by:

getFlowContext in interface FlowContextHandler

Returns:

the actor, null if none available

getTrain

public weka.core.Instances getTrain()

Returns the training set.

Returns:

the dataset

getTest

public weka.core.Instances getTest()

Returns the test set.

Returns:

the dataset

getFold

public int getFold()

Returns the fold index.

Returns:

the fold

getDiscardPredictions

public boolean getDiscardPredictions()

Returns whether the predictions are discarded.

Returns:

true if discarded

getStatusMessageHandler

public StatusMessageHandler getStatusMessageHandler()

Returns the status message handler.

Returns:

the handler

getEvaluation

public weka.classifiers.Evaluation getEvaluation()

Returns the generated evaluation object.

Returns:

the evaluation, null if not available

getClassifier

public weka.classifiers.Classifier getClassifier()

Returns the classifier (should be built after the job finished).

Returns:

the classifier

preProcessCheck

protected String preProcessCheck()

Description copied from class: AbstractJob

Checks whether all pre-conditions have been met.

Specified by:

preProcessCheck in class AbstractJob

Returns:

null if everything is OK, otherwise an error message

process

protected void process()
                throws Exception

Does the actual execution of the job.

Specified by:

process in class AbstractJob

Throws:

Exception - if fails to execute job

postProcessCheck

protected String postProcessCheck()

Checks whether all post-conditions have been met.

Specified by:

postProcessCheck in class AbstractJob

Returns:

null if everything is OK, otherwise an error message

cleanUp

public void cleanUp()

Cleans up data structures, frees up memory. Removes dependencies and job parameters.

Specified by:

cleanUp in interface CleanUpHandler

Specified by:

cleanUp in interface Job

Overrides:

cleanUp in class AbstractJob

toString

public String toString()

Returns a string representation of this job.

Specified by:

toString in class AbstractJob

Returns:

the job as string