weka.knowledgeflow.steps

Class InstanceStreamToBatchMaker

java.lang.Object

weka.knowledgeflow.steps.BaseStep

weka.knowledgeflow.steps.InstanceStreamToBatchMaker

All Implemented Interfaces:

Serializable, BaseStepExtender, Step

@KFStep(name="InstanceStreamToBatchMaker",
        category="Flow",
        toolTipText="Converts an incoming instance stream into a batch dataset",
        iconPath="weka/gui/knowledgeflow/icons/InstanceStreamToBatchMaker.gif")
public class InstanceStreamToBatchMaker
extends BaseStep

Step that converts an incoming instance stream to a batch dataset

Version:

$Revision: $

Author:

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

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
InstanceStreamToBatchMaker()

Method Summary

Modifier and Type	Method and Description
List<String>	getIncomingConnectionTypes() Get a list of incoming connection types that this step can accept.
List<String>	getOutgoingConnectionTypes() Get a list of outgoing connection types that this step can produce.
Instances	outputStructureForConnectionType(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 incoming data
void	stepInit() Initialize the step.

Methods inherited from class weka.knowledgeflow.steps.BaseStep

environmentSubstitute, getCustomEditorForStep, getDefaultSettings, getInteractiveViewers, getInteractiveViewersImpls, getName, getStepManager, globalInfo, isResourceIntensive, isStopRequested, setName, setStepIsResourceIntensive, setStepManager, start, stop

Methods inherited from class java.lang.Object

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

Constructor Detail

InstanceStreamToBatchMaker

public InstanceStreamToBatchMaker()

Method Detail

stepInit

public void stepInit()
              throws WekaException

Initialize the step.

Throws:

WekaException - if a problem occurs during initialization

getIncomingConnectionTypes

public List<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 List<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

processIncoming

public void processIncoming(Data data)
                     throws WekaException

Process incoming data

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

outputStructureForConnectionType

public Instances outputStructureForConnectionType(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