edu.illinois.cs.cogcomp.lbjava.classify

Class RealFeature

java.lang.Object

edu.illinois.cs.cogcomp.lbjava.classify.Feature

edu.illinois.cs.cogcomp.lbjava.classify.RealFeature

All Implemented Interfaces:

Serializable, Cloneable, Comparable

Direct Known Subclasses:

RealConjunctiveFeature, RealPrimitiveFeature, RealPrimitiveStringFeature, RealReferrer

public abstract class RealFeature
extends Feature

A real feature takes on any value representable by a double.

Author:

Nick Rizzolo

See Also:

Serialized Form

Field Summary

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

containingPackage, generatingClassifier

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	RealFeature() For internal use only.
	RealFeature(String p, String c) Sets both the identifier and the value.

Method Summary

Modifier and Type	Method and Description
Feature	conjunction(Feature f, Classifier c) Create a feature representing the conjunction of this feature with the given argument feature.
ByteString	getByteStringValue() Gives a string representation of the value of this feature.
String	getStringValue() Gives a string representation of the value of this feature.
boolean	isDiscrete() Determines if this feature is discrete.
RealFeature	makeReal() Simply returns this object.
abstract RealFeature	multiply(double m) Returns a new feature object, the same as this one in all respects except the value has been multiplied by the specified number.
boolean	valueEquals(String v) Determines whether or not the parameter is equivalent to the string representation of the value of this feature.

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

childLexiconLookup, classEquivalent, clone, compareNameStrings, compareTo, conjunctWith, conjunctWith, depth, encode, equals, fromArray, getByteStringIdentifier, getFeatureKey, getFeatureKey, getGeneratingClassifier, getPackage, getStrength, getStringIdentifier, getValueIndex, hasByteStringIdentifier, hashCode, hasStringIdentifier, isConjunctive, isPrimitive, isReferrer, lexRead, lexReadFeature, lexWrite, read, readFeature, removeFromChildLexicon, setArrayLength, toString, toStringNoPackage, totalValues, withStrength, write, write, writeNameString, writeNoPackage

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

RealFeature

protected RealFeature()

For internal use only.

See Also:

Feature.readFeature(edu.illinois.cs.cogcomp.core.datastructures.vectors.ExceptionlessInputStream)

RealFeature

public RealFeature(String p,
                   String c)

Sets both the identifier and the value.

Parameters:

p - The new real feature's package.

c - The name of the classifier that produced this feature.

Method Detail

isDiscrete

public boolean isDiscrete()

Determines if this feature is discrete.

Specified by:

isDiscrete in class Feature

Returns:

true iff this is discrete.

getStringValue

public String getStringValue()

Gives a string representation of the value of this feature.

Specified by:

getStringValue in class Feature

Returns:

null, since real features don't have string values.

getByteStringValue

public ByteString getByteStringValue()

Gives a string representation of the value of this feature.

Specified by:

getByteStringValue in class Feature

Returns:

null, since real features don't have string values.

valueEquals

public boolean valueEquals(String v)

Determines whether or not the parameter is equivalent to the string representation of the value of this feature.

Specified by:

valueEquals in class Feature

Parameters:

v - The string to compare against.

Returns:

false, since real features don't have string values.

makeReal

public RealFeature makeReal()

Simply returns this object.

Specified by:

makeReal in class Feature

multiply

public abstract RealFeature multiply(double m)

Returns a new feature object, the same as this one in all respects except the value has been multiplied by the specified number.

Parameters:

m - The multiplier.

Returns:

A new real feature whose value is the product of this feature's value and the specified multiplier.

conjunction

public Feature conjunction(Feature f,
                           Classifier c)

Create a feature representing the conjunction of this feature with the given argument feature.

Specified by:

conjunction in class Feature

Parameters:

f - The feature to conjunct with.

c - The classifier producing the resulting feature.

Returns:

A feature representing the conjunction of this feature and f.