Package weka.experiment

Class CSVResultListener

java.lang.Object

weka.experiment.CSVResultListener

All Implemented Interfaces:

Serializable, OptionHandler, RevisionHandler, ResultListener

Direct Known Subclasses:

InstancesResultListener

public class CSVResultListener
extends Object
implements ResultListener, OptionHandler, RevisionHandler

Takes results from a result producer and assembles them into comma separated value form.

Valid options are:

 -O <file name>
  The filename where output will be stored. Use - for stdout.
  (default temp file)
 

Version:

$Revision$

Author:

Len Trigg (trigg@cs.waikato.ac.nz)

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor	Description
CSVResultListener()	Sets temporary file.

Method Summary

Modifier and Type	Method	Description
void	acceptResult(ResultProducer rp, Object[] key, Object[] result)	Just prints out each result as it is received.
String[]	determineColumnConstraints(ResultProducer rp)	Determines if there are any constraints (imposed by the destination) on the result columns to be produced by resultProducers.
String[]	getOptions()	Gets the current settings of the Classifier.
File	getOutputFile()	Get the value of OutputFile.
String	getRevision()	Returns the revision string.
String	globalInfo()	Returns a string describing this result listener
boolean	isResultRequired(ResultProducer rp, Object[] key)	Always says a result is required.
Enumeration<Option>	listOptions()	Returns an enumeration describing the available options..
String	outputFileName()	Get the value of OutputFileName.
String	outputFileTipText()	Returns the tip text for this property
void	postProcess(ResultProducer rp)	Perform any postprocessing.
void	preProcess(ResultProducer rp)	Prepare for the results to be received.
void	setOptions(String[] options)	Parses a given list of options.
void	setOutputFile(File newOutputFile)	Set the value of OutputFile.
void	setOutputFileName(String name)	Set the value of OutputFileName.

Methods inherited from class java.lang.Object

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

Constructor Detail

CSVResultListener

public CSVResultListener()

Sets temporary file.

Method Detail

globalInfo

public String globalInfo()

Returns a string describing this result listener

Returns:

a description of the result listener suitable for displaying in the explorer/experimenter gui

listOptions

public Enumeration<Option> listOptions()

Returns an enumeration describing the available options..

Specified by:

listOptions in interface OptionHandler

Returns:

an enumeration of all the available options.

setOptions

public void setOptions(String[] options)
                throws Exception

Parses a given list of options.

Valid options are:

 -O <file name>
  The filename where output will be stored. Use - for stdout.
  (default temp file)
 

Specified by:

setOptions in interface OptionHandler

Parameters:

options - the list of options as an array of strings

Throws:

Exception - if an option is not supported

getOptions

public String[] getOptions()

Gets the current settings of the Classifier.

Specified by:

getOptions in interface OptionHandler

Returns:

an array of strings suitable for passing to setOptions

outputFileTipText

public String outputFileTipText()

Returns the tip text for this property

Returns:

tip text for this property suitable for displaying in the explorer/experimenter gui

getOutputFile

@FilePropertyMetadata(fileChooserDialogType=1,
                      directoriesOnly=false)
public File getOutputFile()

Get the value of OutputFile.

Returns:

Value of OutputFile.

setOutputFile

public void setOutputFile(File newOutputFile)

Set the value of OutputFile. Also sets the OutputFileName.

Parameters:

newOutputFile - Value to assign to OutputFile.

outputFileName

public String outputFileName()

Get the value of OutputFileName.

Returns:

Value of OutputFile.

setOutputFileName

public void setOutputFileName(String name)

Set the value of OutputFileName. Must be used AFTER setOutputFile.

Parameters:

name - the name of OutputFile.

preProcess

public void preProcess(ResultProducer rp)
                throws Exception

Prepare for the results to be received.

Specified by:

preProcess in interface ResultListener

Parameters:

rp - the ResultProducer that will generate the results

Throws:

Exception - if an error occurs during preprocessing.

postProcess

public void postProcess(ResultProducer rp)
                 throws Exception

Perform any postprocessing. When this method is called, it indicates that no more results will be sent that need to be grouped together in any way.

Specified by:

postProcess in interface ResultListener

Parameters:

rp - the ResultProducer that generated the results

Throws:

Exception - if an error occurs

determineColumnConstraints

public String[] determineColumnConstraints(ResultProducer rp)
                                    throws Exception

Determines if there are any constraints (imposed by the destination) on the result columns to be produced by resultProducers. Null should be returned if there are NO constraints, otherwise a list of column names should be returned as an array of Strings.

Specified by:

determineColumnConstraints in interface ResultListener

Parameters:

rp - the ResultProducer to which the constraints will apply

Returns:

an array of column names to which resutltProducer's results will be restricted.

Throws:

Exception - if an error occurs.

acceptResult

public void acceptResult(ResultProducer rp,
                         Object[] key,
                         Object[] result)
                  throws Exception

Just prints out each result as it is received.

Specified by:

acceptResult in interface ResultListener

Parameters:

rp - the ResultProducer that generated the result

key - The key for the results.

result - The actual results.

Throws:

Exception - if the result could not be accepted.

isResultRequired

public boolean isResultRequired(ResultProducer rp,
                                Object[] key)
                         throws Exception

Always says a result is required. If this is the first call, prints out the header for the csv output.

Specified by:

isResultRequired in interface ResultListener

Parameters:

rp - the ResultProducer wanting to generate the result

key - The key for which a result may be needed.

Returns:

true if the result should be calculated.

Throws:

Exception - if it could not be determined if the result is needed.

getRevision

public String getRevision()

Returns the revision string.

Specified by:

getRevision in interface RevisionHandler

Returns:

the revision