dragon.ir.index

Class DualIndexer

java.lang.Object

dragon.ir.index.DualIndexer

All Implemented Interfaces:

Indexer

public class DualIndexer
extends Object
implements Indexer

The class handles two dimensional document language model indexing

Copyright: Copyright (c) 2005

Company: IST, Drexel University

Version:

1.0

Author:

Davis Zhou

Field Summary

Fields

Modifier and Type	Field and Description
protected DualConceptExtractor	extractor
protected boolean	firstUseConcept
protected BasicIndexWriteController	firstWriter
protected boolean	initialized
protected boolean	relationSupported
protected boolean	secondUseConcept
protected BasicIndexWriteController	secondWriter

Constructor Summary

Constructors

Constructor and Description
DualIndexer(DualConceptExtractor extractor, boolean firstUseConcept, String firstIndexFolder, boolean secondUseConcept, String secondIndexFolder)
DualIndexer(DualConceptExtractor extractor, boolean useConcept, String firstIndexFolder, String secondIndexFolder)
DualIndexer(DualConceptExtractor extractor, String firstIndexFolder, String secondIndexFolder)

Method Summary

Modifier and Type	Method and Description
void	close() This method releases occupied resources.
boolean	index(Article article) An article has many sections such as title, abstract and body.
boolean	indexed(String docKey)
void	initialize() It is required to call this method before calling index method to index articles.
void	setLog(String logFile)
protected void	writeLog(String content)

Methods inherited from class java.lang.Object

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

Field Detail

firstWriter

protected BasicIndexWriteController firstWriter

secondWriter

protected BasicIndexWriteController secondWriter

relationSupported

protected boolean relationSupported

initialized

protected boolean initialized

extractor

protected DualConceptExtractor extractor

firstUseConcept

protected boolean firstUseConcept

secondUseConcept

protected boolean secondUseConcept

Constructor Detail

DualIndexer

public DualIndexer(DualConceptExtractor extractor,
                   String firstIndexFolder,
                   String secondIndexFolder)

DualIndexer

public DualIndexer(DualConceptExtractor extractor,
                   boolean useConcept,
                   String firstIndexFolder,
                   String secondIndexFolder)

DualIndexer

public DualIndexer(DualConceptExtractor extractor,
                   boolean firstUseConcept,
                   String firstIndexFolder,
                   boolean secondUseConcept,
                   String secondIndexFolder)

Method Detail

setLog

public void setLog(String logFile)

Specified by:

setLog in interface Indexer

initialize

public void initialize()

Description copied from interface: Indexer

It is required to call this method before calling index method to index articles.

Specified by:

initialize in interface Indexer

close

public void close()

Description copied from interface: Indexer

This method releases occupied resources.

Specified by:

close in interface Indexer

index

public boolean index(Article article)

Description copied from interface: Indexer

An article has many sections such as title, abstract and body. The selection of sections for indexing is subject to the implemented indexers.

Specified by:

index in interface Indexer

Parameters:

article - the article for indexing

Returns:

true if indexed successfully

indexed

public boolean indexed(String docKey)

Specified by:

indexed in interface Indexer

Parameters:

docKey - the unique document entry number

Returns:

true if this document has been indexed

writeLog

protected void writeLog(String content)