edu.illinois.cs.cogcomp.lbjava.infer

Class ParameterizedConstraint

java.lang.Object

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

edu.illinois.cs.cogcomp.lbjava.infer.ParameterizedConstraint

All Implemented Interfaces:

Serializable, Cloneable

public abstract class ParameterizedConstraint
extends Classifier

This class represents an LBJava constraint as it appears in a source file. When given its input object, an object of this class generates objects of type FirstOrderConstraint. ParameterizedConstraints are also Boolean Classifiers.

ParameterizedConstraint depends on extending classes to override the discreteValue(Object) method so that it returns "true" or "false" as appropriate. When this is done, there is no need to override the classify(Object) method.

Author:

Nick Rizzolo

See Also:

Serialized Form

Field Summary

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

containingPackage, name

Constructor Summary

Constructors

Constructor and Description
ParameterizedConstraint() Default constructor.
ParameterizedConstraint(String n) Initializes the name.

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) This method makes one or more decisions about a single object, returning those decisions as Features in a vector.
Feature	featureValue(Object o) Returns the classification of the given example object as a single feature instead of a FeatureVector.
abstract FirstOrderConstraint	makeConstraint(Object o) This method builds a first order constraint based on the given input object.
short	shortValue(Object o) Returns the prediction of this classifier as a short that acts as a pointer into DiscreteFeature.BooleanValues.

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

classify, clone, discreteValue, discreteValueArray, getCompositeChildren, getInputType, getOutputType, realValue, realValueArray, test, toString, valueIndexOf

Methods inherited from class java.lang.Object

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

Constructor Detail

ParameterizedConstraint

public ParameterizedConstraint()

Default constructor.

ParameterizedConstraint

public ParameterizedConstraint(String n)

Initializes the name.

Parameters:

n - The name of this constraint.

Method Detail

classify

public FeatureVector classify(Object o)

This method makes one or more decisions about a single object, returning those decisions as Features in a vector.

Specified by:

classify in class Classifier

Parameters:

o - The object to make decisions about.

Returns:

A vector of Features about the input object.

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.

shortValue

public short shortValue(Object o)

Returns the prediction of this classifier as a short that acts as a pointer into DiscreteFeature.BooleanValues.

Parameters:

o - The object to classify.

Returns:

The classification of o as a short.

allowableValues

public String[] allowableValues()

Returns the array of allowable values that a feature returned by this classifier may take. If the array has length 0, it means either that the feature has discrete type and allowable values were not specified or that the feature has real or mixed type. The default return value of this method is a 0 length array.

This method should be overridden by derived classes.

Overrides:

allowableValues in class Classifier

Returns:

The allowable values that a feature returned by this classifier may take.

makeConstraint

public abstract FirstOrderConstraint makeConstraint(Object o)

This method builds a first order constraint based on the given input object.

Parameters:

o - The object to build a constraint with respect to.

Returns:

A first order constraint.