org.jbox.searcher
Class AbstractSearcher

java.lang.Object
  org.jbox.searcher.AbstractSearcher

All Implemented Interfaces:

Searcher

Direct Known Subclasses:

SimpleSearcher

public abstract class AbstractSearcher
extends java.lang.Object
implements Searcher

An abstract class define default behavior of Searcher.

Version:

1.0

Author:

YiBin.H

Field Summary

protected static long	ALLPAGENUM number of pages in table "Page" in data base.
protected CutterBox	cutterBox
protected PageHome	pageHome
protected WordHome	wordHome

Constructor Summary

AbstractSearcher()

Method Summary

protected double	calculateTFIDF(double tf, double pageNum) Calculator TFIDF.
protected long	getAllPageNum() Return number of pages in data base.
protected void	pageRank(PageProxy[] pageProxys, int start, int end) Rank pages.
void	setCutterBox(CutterBox cutterBox) Set a CutterBox object for Searcher to analyze the query string.
void	setPageHome(PageHome pageHome) Set PageHome for visiting Page table in data base.
void	setWordHome(WordHome wordHome) Set WordHome for visiting Word table in data base.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.jbox.searcher.Searcher

search

Field Detail

cutterBox

protected CutterBox cutterBox

pageHome

protected PageHome pageHome

wordHome

protected WordHome wordHome

ALLPAGENUM

protected static long ALLPAGENUM

number of pages in table "Page" in data base.

Constructor Detail

AbstractSearcher

public AbstractSearcher()

Method Detail

setCutterBox

public void setCutterBox(CutterBox cutterBox)

Description copied from interface: Searcher

Set a CutterBox object for Searcher to analyze the query string.

Specified by:

setCutterBox in interface Searcher

Parameters:

cutterBox - CutterBox object.

setPageHome

public void setPageHome(PageHome pageHome)

Set PageHome for visiting Page table in data base.

Specified by:

setPageHome in interface Searcher

Parameters:

pageHome - for visiting Page table in data base.

setWordHome

public void setWordHome(WordHome wordHome)

Set WordHome for visiting Word table in data base.

Specified by:

setWordHome in interface Searcher

Parameters:

wordHome - a WordHome for visiting Word table in data base.

getAllPageNum

protected long getAllPageNum()

Return number of pages in data base.

Returns:

number of pages in data base.

calculateTFIDF

protected double calculateTFIDF(double tf,
                                double pageNum)

Calculator TFIDF.

Parameters:

tf - TF.

pageNum - number of pages.

Returns:

TFIDF.

pageRank

protected void pageRank(PageProxy[] pageProxys,
                        int start,
                        int end)

Rank pages. This method using "Quick sort Algorithm" to rank pages between start position and end position by TFIDF.

Parameters:

pageProxys - PageProxy array.

start - start position of the array.

end - end position of the array.