dragon.ir.search.feedback
Class AbstractFeedback

java.lang.Object
  |
  +--dragon.ir.search.feedback.AbstractFeedback

All Implemented Interfaces:

Feedback

Direct Known Subclasses:

GenerativeFeedback, InformationFlowFeedback, MinDivergenceFeedback, PhraseTransFeedback, RelationTransFeedback, RocchioFeedback

public abstract class AbstractFeedback

extends java.lang.Object

implements Feedback

Abstract Feedback

Copyright: Copyright (c) 2005

Company: IST, Drexel University

Version:

1.0

Author:

Davis Zhou

Field Summary

protected double	feedbackCoeffi
protected int	feedbackDocNum
protected Searcher	searcher

Constructor Summary

AbstractFeedback(Searcher searcher, int feedbackDocNum, double feedbackCoeffi)

Method Summary

protected IRTerm	buildIRTerm(SimpleTermPredicate predicate)
protected SimpleTermPredicate	buildSimpleTermPredicate(int termIndex, double queryWeight)
protected abstract java.util.ArrayList	estimateNewQueryModel(IRQuery oldQuery)
int	getFeedbackDocNum()
Searcher	getSearcher()
void	setFeedbackDocNum(int docNum)
void	setSearcher(Searcher searcher)
IRQuery	updateQueryModel(IRQuery oldQuery)

Methods inherited from class java.lang.Object

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

Field Detail

feedbackDocNum

protected int feedbackDocNum

searcher

protected Searcher searcher

feedbackCoeffi

protected double feedbackCoeffi

Constructor Detail

AbstractFeedback

public AbstractFeedback(Searcher searcher,
                        int feedbackDocNum,
                        double feedbackCoeffi)

Method Detail

estimateNewQueryModel

protected abstract java.util.ArrayList estimateNewQueryModel(IRQuery oldQuery)

getFeedbackDocNum

public int getFeedbackDocNum()

Specified by:

getFeedbackDocNum in interface Feedback

setFeedbackDocNum

public void setFeedbackDocNum(int docNum)

Specified by:

setFeedbackDocNum in interface Feedback

Parameters:

docNum - the number of top documents for feedback

getSearcher

public Searcher getSearcher()

Specified by:

getSearcher in interface Feedback

Returns:

the searcher for initial search

setSearcher

public void setSearcher(Searcher searcher)

Specified by:

setSearcher in interface Feedback

updateQueryModel

public IRQuery updateQueryModel(IRQuery oldQuery)

Specified by:

updateQueryModel in interface Feedback

Parameters:

oldQuery - the iniital query

Returns:

the updated query

buildIRTerm

protected IRTerm buildIRTerm(SimpleTermPredicate predicate)

buildSimpleTermPredicate

protected SimpleTermPredicate buildSimpleTermPredicate(int termIndex,
                                                       double queryWeight)