info.ephyra.questionanalysis.atype.classifier
Class HybridQuestionClassifier

java.lang.Object
  info.ephyra.questionanalysis.atype.QuestionClassifier
      info.ephyra.questionanalysis.atype.classifier.HybridQuestionClassifier

public class HybridQuestionClassifier
extends QuestionClassifier

The answer type / subtype classifier for English questions.

Version:

2008-02-10

Author:

Justin Betteridge

Field Summary

(package private) java.util.Comparator<AnswerType>	atypeComparator
private java.util.List<QuestionClassifier>	classifiers
private double	confidenceThreshold
private boolean	mergeResults

Fields inherited from class info.ephyra.questionanalysis.atype.QuestionClassifier

extractor, isInitialized, languagePair

Constructor Summary

HybridQuestionClassifier()

Method Summary

java.util.List<AnswerType>	classify(edu.cmu.minorthird.classify.Instance instance) Classifies a question, represented by an Instance, in terms of its expected answer type.
void	initialize() Initializes the FeatureExtractor.

Methods inherited from class info.ephyra.questionanalysis.atype.QuestionClassifier

classifySet, evaluate, getAnswerTypes, getAnswerTypes, getAnswerTypes, getLanguagePair, isInitialized, setInitialized, setLanguagePair

Methods inherited from class java.lang.Object

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

Field Detail

atypeComparator

java.util.Comparator<AnswerType> atypeComparator

classifiers

private java.util.List<QuestionClassifier> classifiers

mergeResults

private boolean mergeResults

confidenceThreshold

private double confidenceThreshold

Constructor Detail

HybridQuestionClassifier

public HybridQuestionClassifier()

Method Detail

initialize

public void initialize()
                throws java.lang.Exception

Description copied from class: QuestionClassifier

Initializes the FeatureExtractor.

Overrides:

initialize in class QuestionClassifier

Throws:

java.lang.Exception - if one of the required input properties is not defined

classify

public java.util.List<AnswerType> classify(edu.cmu.minorthird.classify.Instance instance)

Description copied from class: QuestionClassifier

Classifies a question, represented by an Instance, in terms of its expected answer type. Multiple AnswerTypes may be returned, ranked by their associated score, or probability of being ccrrect. The source object associated with the Instance that is returned by Instance.getSource() must be the original question, in String form.

Specified by:

classify in class QuestionClassifier

Parameters:

instance - the Instance to be classified.

Returns:

a list of AnswerTypes, ranked by their associated score, or probability of being ccrrect.