dragon.ir.index

Class AbstractIndexWriter

java.lang.Object

dragon.ir.index.AbstractIndexWriter

All Implemented Interfaces:

IndexWriter

Direct Known Subclasses:

BasicIndexWriter, OnlineIndexWriter

public abstract class AbstractIndexWriter
extends Object
implements IndexWriter

The class implements two methods writing termdoc and docterm matrix to disk with options of term based, relation based or both

Copyright: Copyright (c) 2005

Company: IST, Drexel University

Version:

1.0

Author:

Davis Zhou

Field Summary

Fields

Modifier and Type	Field and Description
protected IRCollection	collection
protected static int	doc_cache_size
protected int	doc_in_cache
protected IRDocIndexList	docIndexList
protected IntSparseMatrix	docrelationMatrix
protected IntSparseMatrix	doctermMatrix
protected boolean	initialized
protected IRRelationIndexList	relationIndexList
protected boolean	relationSupported
protected IRTermIndexList	termIndexList

Constructor Summary

Constructors

Constructor and Description
AbstractIndexWriter(boolean relationSupported)

Method Summary

Modifier and Type	Method and Description
int	size()
boolean	write(IRDoc curDoc, IRTerm[] arrTerms) All fields (doc key, doc index, term count, term number, relation count, and relation number) of the IRDoc object should be set.
boolean	write(IRDoc curDoc, IRTerm[] arrTerms, IRRelation[] arrRelations) All fields (doc key, doc index, term count, term number, relation count, and relation number) of the IRDoc object should be set.

Methods inherited from class java.lang.Object

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

Methods inherited from interface dragon.ir.index.IndexWriter

clean, close, flush, initialize

Field Detail

doc_cache_size

protected static int doc_cache_size

termIndexList

protected IRTermIndexList termIndexList

relationIndexList

protected IRRelationIndexList relationIndexList

docIndexList

protected IRDocIndexList docIndexList

doctermMatrix

protected IntSparseMatrix doctermMatrix

docrelationMatrix

protected IntSparseMatrix docrelationMatrix

collection

protected IRCollection collection

doc_in_cache

protected int doc_in_cache

relationSupported

protected boolean relationSupported

initialized

protected boolean initialized

Constructor Detail

AbstractIndexWriter

public AbstractIndexWriter(boolean relationSupported)

Method Detail

size

public int size()

Specified by:

size in interface IndexWriter

Returns:

the number of documents indexed.

write

public boolean write(IRDoc curDoc,
                     IRTerm[] arrTerms,
                     IRRelation[] arrRelations)

Description copied from interface: IndexWriter

All fields (doc key, doc index, term count, term number, relation count, and relation number) of the IRDoc object should be set. Fields of IRTerm including term index and term frequency should be set. Fields of IRRelation including relation index, first term, second term, and relation frequency should be set. No duplicated IRTerm or IRRelation is allowed.

Specified by:

write in interface IndexWriter

Parameters:

curDoc - the current document

arrTerms - terms in the current document

arrRelations - relations in the current document

Returns:

true if written successfully

write

public boolean write(IRDoc curDoc,
                     IRTerm[] arrTerms)

Description copied from interface: IndexWriter

All fields (doc key, doc index, term count, term number, relation count, and relation number) of the IRDoc object should be set. Fields of IRTerm including term index and term frequency should be set. No duplicated IRTerm is allowed.

Specified by:

write in interface IndexWriter

Parameters:

curDoc - the current document

arrTerms - terms in the current document

Returns:

true if written successfully