Package weka.knowledgeflow.steps

Class DataGrid

java.lang.Object

weka.knowledgeflow.steps.BaseStep

weka.knowledgeflow.steps.DataGrid

All Implemented Interfaces:

Serializable, BaseStepExtender, Step

@KFStep(name="DataGrid",
        category="DataSources",
        toolTipText="Specify a grid of data to turn into instances",
        iconPath="weka/gui/knowledgeflow/icons/ArffLoader.gif")
public class DataGrid
extends BaseStep

A step that allows the user to define instances to output

Version:

$Revision: $

Author:

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

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
DataGrid()

Method Summary

Modifier and Type	Method	Description
String	getCustomEditorForStep()	Return the fully qualified name of a custom editor component (JComponent) to use for editing the properties of the step.
String	getData()	Get the data to be output by this DataGrid in textual ARFF format
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	setData(String data)	Set the data to be output by this DataGrid in textual ARFF format.
void	start()	Start processing
void	stepInit()	Initialize the step;

Methods inherited from class weka.knowledgeflow.steps.BaseStep

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

Methods inherited from class java.lang.Object

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

Constructor Details

DataGrid

public DataGrid()

Method Details

setData

@ProgrammaticProperty
public void setData(String data)

Set the data to be output by this DataGrid in textual ARFF format.

Parameters:

data - the data to be output in textual ARFF format

getData

public String getData()

Get the data to be output by this DataGrid in textual ARFF format

Returns:

the data to be output in textual ARFF format

stepInit

public void stepInit()
              throws WekaException

Initialize the step;

Throws:

WekaException - if a problem occurs

start

public void start()
           throws WekaException

Start processing

Specified by:

start in interface BaseStepExtender

Specified by:

start in interface Step

Overrides:

start in class BaseStep

Throws:

WekaException - if a problem occurs

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

getIncomingConnectionTypes

public List<String> getIncomingConnectionTypes()

Description copied from interface: Step

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()

Description copied from interface: Step

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

getCustomEditorForStep

public String getCustomEditorForStep()

Return the fully qualified name of a custom editor component (JComponent) to use for editing the properties of the step. This method can return null, in which case the system will dynamically generate an editor using the GenericObjectEditor

Specified by:

getCustomEditorForStep in interface Step

Overrides:

getCustomEditorForStep in class BaseStep

Returns:

the fully qualified name of a step editor component