weka.knowledgeflow.steps

Class Filter

java.lang.Object

weka.knowledgeflow.steps.BaseStep

weka.knowledgeflow.steps.WekaAlgorithmWrapper

weka.knowledgeflow.steps.Filter

All Implemented Interfaces:

java.io.Serializable, BaseStepExtender, Step

@KFStep(name="Filter",
        category="Filters",
        toolTipText="Weka filter wrapper",
        iconPath="")
public class Filter
extends WekaAlgorithmWrapper

Step that wraps a Weka filter. Handles dataSet, trainingSet, testSet and instance connections.

Version:

$Revision: $

Author:

Mark Hall (mhall{[at]}pentaho{[dot]}com)

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
Filter()

Method Summary

Modifier and Type	Method and Description
Filter	getFilter() Get the filter.
java.util.List<java.lang.String>	getIncomingConnectionTypes() Get a list of incoming connection types that this step can accept.
java.util.List<java.lang.String>	getOutgoingConnectionTypes() Get a list of outgoing connection types that this step can produce.
java.lang.Class	getWrappedAlgorithmClass() Get the class of the wrapped algorithm
Instances	outputStructureForConnectionType(java.lang.String connectionName) If possible, get the output structure for the named connection type as a header-only set of instances.
void	processIncoming(Data data) Process an incoming data payload (if the step accepts incoming connections)
void	setFilter(Filter filter) Set the filter.
void	setWrappedAlgorithm(java.lang.Object algo) Set the wrapped algorithm (filter)
void	stepInit() Initialize the step.

Methods inherited from class weka.knowledgeflow.steps.WekaAlgorithmWrapper

getDefaultIconPath, getDefaultPackageLevelIconPath, getIconPath, getWrappedAlgorithm, globalInfo

Methods inherited from class weka.knowledgeflow.steps.BaseStep

environmentSubstitute, getCustomEditorForStep, getDefaultSettings, getInteractiveViewers, getInteractiveViewersImpls, getName, getStepManager, isResourceIntensive, isStopRequested, outputStructureForConnectionType, setName, setStepIsResourceIntensive, setStepManager, setStepMustRunSingleThreaded, start, stepMustRunSingleThreaded, stop

Methods inherited from class java.lang.Object

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

Constructor Detail

Filter

public Filter()

Method Detail

getWrappedAlgorithmClass

public java.lang.Class getWrappedAlgorithmClass()

Get the class of the wrapped algorithm

Specified by:

getWrappedAlgorithmClass in class WekaAlgorithmWrapper

Returns:

the class of the wrapped algorithm

setWrappedAlgorithm

public void setWrappedAlgorithm(java.lang.Object algo)

Set the wrapped algorithm (filter)

Overrides:

setWrappedAlgorithm in class WekaAlgorithmWrapper

Parameters:

algo - the algorithm to wrap

setFilter

@ProgrammaticProperty
public void setFilter(Filter filter)

Set the filter. Calls setWrappedAlgorithm()

Parameters:

filter - the filter to use

getFilter

public Filter getFilter()

Get the filter. Convenience method that calls getWrappedAlgorithm()

Returns:

the filter

getIncomingConnectionTypes

public java.util.List<java.lang.String> getIncomingConnectionTypes()

Get a list of incoming connection types that this step can accept. Ideally (and if appropriate), this should take into account the state of the step and any existing incoming connections. E.g. a step might be able to accept one (and only one) incoming batch data connection.

Returns:

a list of incoming connections that this step can accept given its current state

getOutgoingConnectionTypes

public java.util.List<java.lang.String> getOutgoingConnectionTypes()

Get a list of outgoing connection types that this step can produce. Ideally (and if appropriate), this should take into account the state of the step and the incoming connections. E.g. depending on what incoming connection is present, a step might be able to produce a trainingSet output, a testSet output or neither, but not both.

Returns:

a list of outgoing connections that this step can produce

stepInit

public void stepInit()
              throws WekaException

Initialize the step.

Throws:

WekaException - if a problem occurs during initialization

processIncoming

public void processIncoming(Data data)
                     throws WekaException

Process an incoming data payload (if the step accepts incoming connections)

Specified by:

processIncoming in interface BaseStepExtender

Specified by:

processIncoming in interface Step

Overrides:

processIncoming in class BaseStep

Parameters:

data - the payload to process

Throws:

WekaException - if a problem occurs

outputStructureForConnectionType

public Instances outputStructureForConnectionType(java.lang.String connectionName)
                                           throws WekaException

If possible, get the output structure for the named connection type as a header-only set of instances. Can return null if the specified connection type is not representable as Instances or cannot be determined at present.

Specified by:

outputStructureForConnectionType in interface Step

Overrides:

outputStructureForConnectionType in class BaseStep

Parameters:

connectionName - the name of the connection type to get the output structure for

Returns:

the output structure as a header-only Instances object

Throws:

WekaException - if a problem occurs