edu.udo.cs.yale.operator.io
Class AbstractWekaExampleSource

java.lang.Object
  edu.udo.cs.yale.operator.Operator
      edu.udo.cs.yale.operator.io.AbstractWekaExampleSource

All Implemented Interfaces:

ConfigurationListener

Direct Known Subclasses:

ArffExampleSource, CSVExampleSource

public abstract class AbstractWekaExampleSource
extends Operator

This operator can is a superclass for all operators which can read one of the file formats supported by Weka. It uses the Weka corresponding Weka loader and convert the retrieved instances into a Yale Example Set. Subclasses implementing this class must invoke setLoader(Loader) before the operator can be applied. This class already defines a parameter "data_file" which should be used for the data file name. However, the input file must be set to the loader before it is given to this class and must therefore be queried in the subclass.

Version:

$Id: AbstractWekaExampleSource.java,v 1.3 2006/03/27 13:22:00 ingomierswa Exp $

Author:

Ingo Mierswa

Field Summary

private weka.core.converters.Loader

loader The Weka data loader.

Constructor Summary

AbstractWekaExampleSource(OperatorDescription description)

Method Summary

IOObject[]	apply() Implement this method in subclasses.
abstract java.lang.String	getExtension() Returns the default extension of the data file.
java.lang.Class[]	getInputClasses() Returns the classes that are needed as input.
java.lang.Class[]	getOutputClasses() Returns the classes that are guaranteed to be returned by apply() as additional output.
java.util.List<ParameterType>	getParameterTypes() Returns a list of ParameterTypes describing the parameters of this operator.
protected void	setLoader(weka.core.converters.Loader loader) Please note that the file must be set before the loader is given to this method.

Methods inherited from class edu.udo.cs.yale.operator.Operator

addError, addValue, addWarning, apply, checkDeprecations, checkIO, checkProperties, clearErrorList, cloneOperator, createExperimentTree, createExperimentTree, createFromXML, createMarkedExperimentTree, delete, experimentFinished, experimentStarts, getAddOnlyAdditionalOutput, getApplyCount, getDeliveredOutputClasses, getDeprecationInfo, getDesiredInputClasses, getErrorList, getExperiment, getInnerOperatorsXML, getInput, getInput, getInput, getInputDescription, getIOContainerForInApplyLoopBreakpoint, getName, getNumberOfSteps, getOperatorClassName, getOperatorDescription, getParameter, getParameterAsBoolean, getParameterAsColor, getParameterAsDouble, getParameterAsFile, getParameterAsInt, getParameterAsString, getParameterList, getParameters, getParameterType, getParent, getStartTime, getStatus, getUserDescription, getValue, getValues, getXML, hasBreakpoint, hasBreakpoint, hasInput, inApplyLoop, isEnabled, isParameterSet, logMessage, performAdditionalChecks, register, remove, rename, resume, setBreakpoint, setEnabled, setExperiment, setInput, setListParameter, setOperatorParameters, setParameter, setParameters, setParent, setUserDescription, toString, writeXML

Methods inherited from class java.lang.Object

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

Field Detail

loader

private weka.core.converters.Loader loader

The Weka data loader.

Constructor Detail

AbstractWekaExampleSource

public AbstractWekaExampleSource(OperatorDescription description)

Method Detail

getExtension

public abstract java.lang.String getExtension()

Returns the default extension of the data file.

setLoader

protected void setLoader(weka.core.converters.Loader loader)

Please note that the file must be set before the loader is given to this method.

apply

public IOObject[] apply()
                 throws OperatorException

Description copied from class: Operator

Implement this method in subclasses.

Specified by:

apply in class Operator

Throws:

OperatorException

getInputClasses

public java.lang.Class[] getInputClasses()

Description copied from class: Operator

Returns the classes that are needed as input. May be null or an empty (no desired input). As default, all delivered input objects are consumed and must be also delivered as output in both Operator.getOutputClasses() and Operator.apply() if this is necessary. This default behavior can be changed by overriding Operator.getInputDescription(Class). Subclasses which implement this method should not make use of parameters since this method is invoked by getParameterTypes(). Therefore, parameters are not fully available at this point of time and this might lead to exceptions. Please use InputDescriptions instead.

Specified by:

getInputClasses in class Operator

getOutputClasses

public java.lang.Class[] getOutputClasses()

Description copied from class: Operator

Returns the classes that are guaranteed to be returned by apply() as additional output. Please note that input object which should not be consumed must also be defined by this method (e.g. for preprocessing operators). The default behavior for input consumation is defined by Operator.getInputDescription(Class) and can be changed by overwriting this method. Objects which are not consumed must not be defined as additional output in this method. May be null or an empy array (no additional output is produced).

Specified by:

getOutputClasses in class Operator

getParameterTypes

public java.util.List<ParameterType> getParameterTypes()

Description copied from class: Operator

Returns a list of ParameterTypes describing the parameters of this operator. The default implementation returns an empty list if no input objects can be retained and special parameters for those input objects which can be prevented from being consumed.

Overrides:

getParameterTypes in class Operator