Package weka.knowledgeflow.steps

Class TextSaver

java.lang.Object

weka.knowledgeflow.steps.BaseStep

weka.knowledgeflow.steps.TextSaver

All Implemented Interfaces:

Serializable, BaseStepExtender, Step

@KFStep(name="TextSaver",
        category="DataSinks",
        toolTipText="Save text output to a file",
        iconPath="weka/gui/knowledgeflow/icons/DefaultText.gif")
public class TextSaver
extends BaseStep

Step for saving textual data to a file.

Version:

$Revision: $

Author:

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

See Also:

• Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static final class	TextSaver.TextSaverDefaults	Defaults for the step

Constructor Summary

Constructors

Constructor	Description
TextSaver()

Method Summary

Modifier and Type	Method	Description
boolean	getAppend()	get whether the file should be appended to rather than overwritten
Defaults	getDefaultSettings()	Get default settings for the step (if any).
File	getFile()	Get the file to save to
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.
boolean	getWriteTitleString()	Get whether the title string will be written to the file
void	processIncoming(Data data)	Process an incoming data payload (if the step accepts incoming connections)
void	setAppend(boolean append)	Set whether the file should be appended to rather than overwritten
void	setFile(File f)	Set the file to save to
void	setWriteTitleString(boolean w)	Set whether the title string will be written to the file
void	stepInit()	Initialize the step

Methods inherited from class weka.knowledgeflow.steps.BaseStep

environmentSubstitute, getCustomEditorForStep, getInteractiveViewers, getInteractiveViewersImpls, getName, getStepManager, globalInfo, isResourceIntensive, isStopRequested, outputStructureForConnectionType, 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 Details

TextSaver

public TextSaver()

Method Details

setFile

@OptionMetadata(displayName="File to save to",
                description="The file to save textual results to",
                displayOrder=1)
@FilePropertyMetadata(fileChooserDialogType=0,
                      directoriesOnly=false)
public void setFile(File f)

Set the file to save to

Parameters:

f - the file to save to

getFile

public File getFile()

Get the file to save to

Returns:

the file to save to

setAppend

@OptionMetadata(displayName="Append to file",
                description="Append to file, rather than re-create for each incoming texual result",
                displayOrder=2)
public void setAppend(boolean append)

Set whether the file should be appended to rather than overwritten

Parameters:

append - true to append

getAppend

public boolean getAppend()

get whether the file should be appended to rather than overwritten

Returns:

true if the file will be appended to

setWriteTitleString

@OptionMetadata(displayName="Write title string",
                description="Whether to output the title string associated with each textual result",
                displayOrder=3)
public void setWriteTitleString(boolean w)

Set whether the title string will be written to the file

Parameters:

w - true to write the title string

getWriteTitleString

public boolean getWriteTitleString()

Get whether the title string will be written to the file

Returns:

true if the title string will be written

stepInit

public void stepInit()
              throws WekaException

Initialize the step

Throws:

WekaException - if a problem occurs

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 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 data to process

Throws:

WekaException - if a problem occurs

getDefaultSettings

public Defaults getDefaultSettings()

Get default settings for the step (if any). Returning null indicates that the step has no user-editable defaults.

Specified by:

getDefaultSettings in interface Step

Overrides:

getDefaultSettings in class BaseStep

Returns:

the default settings