weka.experiment

Class InstancesResultListener

java.lang.Object

weka.experiment.CSVResultListener

weka.experiment.InstancesResultListener

All Implemented Interfaces:

java.io.Serializable, OptionHandler, RevisionHandler, ResultListener

public class InstancesResultListener
extends CSVResultListener

Outputs the received results in arff format to a Writer. All results must be received before the instances can be written out.

Valid options are:

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

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected int[]	m_AttributeTypes Stores the attribute types for each column
protected java.util.ArrayList<Instance>	m_Instances Stores the instances created so far, before assigning to a header
protected java.util.Hashtable<java.lang.String,java.lang.Double>[]	m_NominalIndexes For lookup of indices given a string value for each nominal attribute
protected java.util.ArrayList<java.lang.String>[]	m_NominalStrings Contains strings seen so far for each nominal attribute

Fields inherited from class weka.experiment.CSVResultListener

m_Out, m_OutputFile, m_OutputFileName, m_RP

Constructor Summary

Constructors

Constructor and Description
InstancesResultListener() Sets temporary file.

Method Summary

Modifier and Type	Method and Description
void	acceptResult(ResultProducer rp, java.lang.Object[] key, java.lang.Object[] result) Collects each instance and adjusts the header information.
java.lang.String	getRevision() Returns the revision string.
java.lang.String	globalInfo() Returns a string describing this result listener
void	postProcess(ResultProducer rp) Perform any postprocessing.
void	preProcess(ResultProducer rp) Prepare for the results to be received.

Methods inherited from class weka.experiment.CSVResultListener

determineColumnConstraints, getOptions, getOutputFile, isResultRequired, listOptions, outputFileName, outputFileTipText, setOptions, setOutputFile, setOutputFileName

Methods inherited from class java.lang.Object

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

Field Detail

m_Instances

protected transient java.util.ArrayList<Instance> m_Instances

Stores the instances created so far, before assigning to a header

m_AttributeTypes

protected transient int[] m_AttributeTypes

Stores the attribute types for each column

m_NominalIndexes

protected transient java.util.Hashtable<java.lang.String,java.lang.Double>[] m_NominalIndexes

For lookup of indices given a string value for each nominal attribute

m_NominalStrings

protected transient java.util.ArrayList<java.lang.String>[] m_NominalStrings

Contains strings seen so far for each nominal attribute

Constructor Detail

InstancesResultListener

public InstancesResultListener()

Sets temporary file.

Method Detail

globalInfo

public java.lang.String globalInfo()

Returns a string describing this result listener

Overrides:

globalInfo in class CSVResultListener

Returns:

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

preProcess

public void preProcess(ResultProducer rp)
                throws java.lang.Exception

Prepare for the results to be received.

Specified by:

preProcess in interface ResultListener

Overrides:

preProcess in class CSVResultListener

Parameters:

rp - the ResultProducer that will generate the results

Throws:

java.lang.Exception - if an error occurs during preprocessing.

postProcess

public void postProcess(ResultProducer rp)
                 throws java.lang.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

Overrides:

postProcess in class CSVResultListener

Parameters:

rp - the ResultProducer that generated the results

Throws:

java.lang.Exception - if an error occurs

acceptResult

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

Collects each instance and adjusts the header information.

Specified by:

acceptResult in interface ResultListener

Overrides:

acceptResult in class CSVResultListener

Parameters:

rp - the ResultProducer that generated the result

key - The key for the results.

result - The actual results.

Throws:

java.lang.Exception - if the result could not be accepted.

getRevision

public java.lang.String getRevision()

Returns the revision string.

Specified by:

getRevision in interface RevisionHandler

Overrides:

getRevision in class CSVResultListener

Returns:

the revision