de.up.ling.irtg.maxent

Class RuleNameFeature

java.lang.Object

de.up.ling.irtg.maxent.FeatureFunction<String,Double>

de.up.ling.irtg.maxent.RuleNameFeature

public class RuleNameFeature
extends FeatureFunction<String,Double>

A feature that returns 1 iff the rule name matches the name that is passed to the constructor. The feature function returns 0 otherwise.

Author:

koller

Constructor Summary

Constructors

Constructor and Description
RuleNameFeature(String x)

Method Summary

Modifier and Type	Method and Description
Double	evaluate(Rule rule, TreeAutomaton<String> automaton, MaximumEntropyIrtg irtg, Map<String,Object> inputs) Computes the value of the feature function for a given rule.
String	getX()
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

RuleNameFeature

public RuleNameFeature(String x)

Method Detail

getX

public String getX()

evaluate

public Double evaluate(Rule rule,
                       TreeAutomaton<String> automaton,
                       MaximumEntropyIrtg irtg,
                       Map<String,Object> inputs)

Description copied from class: FeatureFunction

Computes the value of the feature function for a given rule. Implement this method in a subclass to realize the actual feature function.

Specified by:

evaluate in class FeatureFunction<String,Double>

Parameters:

rule - a rule in "automaton"

automaton - the tree automaton to which "rule" belongs, typically a parse chart

irtg - the maxent IRTG which defined the grammar rule on which "rule" is based

inputs - the inputs that are currently being parsed

Returns:

the value of this feature function on those inputs

toString

public String toString()

Overrides:

toString in class FeatureFunction<String,Double>