edu.illinois.cs.cogcomp.lbjava.classify

Class ValueComparer

java.lang.Object

edu.illinois.cs.cogcomp.lbjava.classify.Classifier

edu.illinois.cs.cogcomp.lbjava.classify.ValueComparer

All Implemented Interfaces:

Serializable, Cloneable

Direct Known Subclasses:

MultiValueComparer

public class ValueComparer
extends Classifier

This classifier applies another classifier to the example object and returns a Boolean feature (with value "true" or "false") representing the equality of the argument classifier's feature value to a given value. The argument classifier must be discrete.

Author:

Nick Rizzolo

See Also:

MultiValueComparer, Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected Classifier	labeler The classifier whose value will be compared.
protected String	value The value to compare with.

Fields inherited from class edu.illinois.cs.cogcomp.lbjava.classify.Classifier

containingPackage, name

Constructor Summary

Constructors

Constructor and Description
ValueComparer(Classifier c, String v) Constructor.

Method Summary

Modifier and Type	Method and Description
String[]	allowableValues() Returns the array of allowable values that a feature returned by this classifier may take.
FeatureVector	classify(Object o) Returns a Boolean feature (with value "true" or "false") representing the equality of the output of labeler applied to the argument object and value.
String	discreteValue(Object o) Returns the value of the discrete feature that would be returned by this classifier.
Feature	featureValue(Object o) Returns the classification of the given example object as a single feature instead of a FeatureVector.
String	getInputType() Returns a string describing the input type of this classifier.
void	setLabeler(Classifier l) Sets the value of labeler.
String	toString() The String representation of a ValueComparer has the form "ValueComparer(child), where child is the String representation of the classifier whose value is being compared.

Methods inherited from class edu.illinois.cs.cogcomp.lbjava.classify.Classifier

classify, clone, discreteValueArray, getCompositeChildren, getOutputType, realValue, realValueArray, test, valueIndexOf

Methods inherited from class java.lang.Object

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

Field Detail

labeler

protected Classifier labeler

The classifier whose value will be compared.

value

protected String value

The value to compare with.

Constructor Detail

ValueComparer

public ValueComparer(Classifier c,
                     String v)

Constructor.

Parameters:

c - The classifier whose value will be compared.

v - The value to compare with.

Method Detail

setLabeler

public void setLabeler(Classifier l)

Sets the value of labeler.

classify

public FeatureVector classify(Object o)

Returns a Boolean feature (with value "true" or "false") representing the equality of the output of labeler applied to the argument object and value.

Specified by:

classify in class Classifier

Parameters:

o - The object to make decisions about.

Returns:

A feature vector containing the feature described above.

featureValue

public Feature featureValue(Object o)

Returns the classification of the given example object as a single feature instead of a FeatureVector.

Overrides:

featureValue in class Classifier

Parameters:

o - The object to classify.

Returns:

The classification of o as a feature.

discreteValue

public String discreteValue(Object o)

Returns the value of the discrete feature that would be returned by this classifier.

Overrides:

discreteValue in class Classifier

Parameters:

o - The object to classify.

Returns:

The value of the feature produced for the input object.

getInputType

public String getInputType()

Returns a string describing the input type of this classifier.

Overrides:

getInputType in class Classifier

Returns:

A string describing the input type of this classifier.

allowableValues

public String[] allowableValues()

Returns the array of allowable values that a feature returned by this classifier may take.

Overrides:

allowableValues in class Classifier

Returns:

DiscreteFeature.BooleanValues

See Also:

DiscreteFeature.BooleanValues

toString

public String toString()

The String representation of a ValueComparer has the form "ValueComparer(child), where child is the String representation of the classifier whose value is being compared.

Overrides:

toString in class Classifier

Returns:

A string of the form described above.