dragon.ir.index.sequence

Class AbstractSequenceIndexReader

java.lang.Object

dragon.ir.index.sequence.AbstractSequenceIndexReader

All Implemented Interfaces:

IndexReader, SequenceIndexReader

Direct Known Subclasses:

BasicSequenceIndexReader, OnlineSequenceIndexReader

public abstract class AbstractSequenceIndexReader
extends Object
implements SequenceIndexReader

The abstract index reader for sequencial data

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 CollectionReader	collectionReader
protected IRDocIndexList	docIndexList
protected SimpleElementList	docKeyList
protected SequenceReader	doctermSeq
protected boolean	initialized
protected IRTermIndexList	termIndexList
protected SimpleElementList	termKeyList

Constructor Summary

Constructors

Constructor and Description
AbstractSequenceIndexReader()

Method Summary

Modifier and Type	Method and Description
void	close() This method releases all occupied resources.
IRCollection	getCollection()
IRDoc	getDoc(int index)
IRDoc	getDoc(String key)
String	getDocKey(int index)
IRRelation	getIRRelation(int index)
IRRelation	getIRRelation(int relationIndex, int docIndex) If the given document does not contain the given relation, this method returns null.
IRTerm	getIRTerm(int index)
IRTerm	getIRTerm(int termIndex, int docIndex) If the given document does not contain the given term, this method returns null.
IRTerm	getIRTerm(String key)
Article	getOriginalDoc(int index)
Article	getOriginalDoc(String key)
int[]	getRelationDocFrequencyList(int relationIndex)
int[]	getRelationDocIndexList(int relationIndex)
IRDoc[]	getRelationDocList(int relationIndex)
int[]	getRelationFrequencyList(int docIndex) To know what relation the frequency corresponds to, call the method getRelationIndexList.
int[]	getRelationIndexList(int docIndex)
IRRelation[]	getRelationList(int docIndex)
int[]	getTermDocFrequencyList(int termIndex)
int[]	getTermDocIndexList(int termIndex)
IRDoc[]	getTermDocList(int termIndex)
int[]	getTermFrequencyList(int docIndex) To know what term the frequency corresponds to, call the method getTermIndexList.
int[]	getTermIndexList(int docIndex)
String	getTermKey(int index)
IRTerm[]	getTermList(int docIndex)
boolean	isRelationSupported()

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.IndexReader

initialize

Field Detail

collectionReader

protected CollectionReader collectionReader

termKeyList

protected SimpleElementList termKeyList

docKeyList

protected SimpleElementList docKeyList

termIndexList

protected IRTermIndexList termIndexList

docIndexList

protected IRDocIndexList docIndexList

doctermSeq

protected SequenceReader doctermSeq

collection

protected IRCollection collection

initialized

protected boolean initialized

Constructor Detail

AbstractSequenceIndexReader

public AbstractSequenceIndexReader()

Method Detail

close

public void close()

Description copied from interface: IndexReader

This method releases all occupied resources.

Specified by:

close in interface IndexReader

isRelationSupported

public boolean isRelationSupported()

Specified by:

isRelationSupported in interface IndexReader

Returns:

true if the indexing contains relationship information

getCollection

public IRCollection getCollection()

Specified by:

getCollection in interface IndexReader

Returns:

IRCollection object which contains the statistics of the indexed collection

getDoc

public IRDoc getDoc(int index)

Specified by:

getDoc in interface IndexReader

Parameters:

index - the index of the document

Returns:

the IRDoc object

getDocKey

public String getDocKey(int index)

Specified by:

getDocKey in interface IndexReader

Parameters:

index - the index of the document

Returns:

the unique entry number of the index-th document

getDoc

public IRDoc getDoc(String key)

Specified by:

getDoc in interface IndexReader

Parameters:

key - the unique etnry number of the document

Returns:

the IRDoc object

getOriginalDoc

public Article getOriginalDoc(String key)

Specified by:

getOriginalDoc in interface IndexReader

Parameters:

key - the unique entry number of the document

Returns:

the raw content of the indexed document

getOriginalDoc

public Article getOriginalDoc(int index)

Specified by:

getOriginalDoc in interface IndexReader

Parameters:

index - the index of the document

Returns:

the raw content of the indexed document

getTermList

public IRTerm[] getTermList(int docIndex)

Specified by:

getTermList in interface IndexReader

Parameters:

docIndex - the index of the document

Returns:

a list of unique terms in the given document

getTermIndexList

public int[] getTermIndexList(int docIndex)

Specified by:

getTermIndexList in interface IndexReader

Parameters:

docIndex - the index of the document

Returns:

an interger array each elment of which is the index of unique terms in the given document

getTermFrequencyList

public int[] getTermFrequencyList(int docIndex)

Description copied from interface: IndexReader

To know what term the frequency corresponds to, call the method getTermIndexList.

Specified by:

getTermFrequencyList in interface IndexReader

Parameters:

docIndex - the index of the document

Returns:

an interger array each elment of which is the frequency of unique terms in the given document

getIRTerm

public IRTerm getIRTerm(int index)

Specified by:

getIRTerm in interface IndexReader

Parameters:

index - the index of the term

Returns:

the IRTerm object

getTermKey

public String getTermKey(int index)

Specified by:

getTermKey in interface IndexReader

Returns:

the name of the given term

getIRTerm

public IRTerm getIRTerm(String key)

Specified by:

getIRTerm in interface IndexReader

Parameters:

key - the name of the term

Returns:

the IRTerm object

getIRTerm

public IRTerm getIRTerm(int termIndex,
                        int docIndex)

Description copied from interface: IndexReader

If the given document does not contain the given term, this method returns null.

Specified by:

getIRTerm in interface IndexReader

Parameters:

termIndex - the index of the term

docIndex - the index of the document

Returns:

the IRTerm object

getTermDocList

public IRDoc[] getTermDocList(int termIndex)

Specified by:

getTermDocList in interface IndexReader

Parameters:

termIndex - the index of the term

Returns:

a list of IRDoc objects which contain the specified term

getTermDocFrequencyList

public int[] getTermDocFrequencyList(int termIndex)

Specified by:

getTermDocFrequencyList in interface IndexReader

Parameters:

termIndex - the index of the term

Returns:

a list of frequencies the given term occurs in the documents containing this term

getTermDocIndexList

public int[] getTermDocIndexList(int termIndex)

Specified by:

getTermDocIndexList in interface IndexReader

Parameters:

termIndex - the index of the term

Returns:

a list of indices of documents containing this term

getRelationList

public IRRelation[] getRelationList(int docIndex)

Specified by:

getRelationList in interface IndexReader

Parameters:

docIndex - the index of the document

Returns:

a list of unique relations in the given document

getRelationFrequencyList

public int[] getRelationFrequencyList(int docIndex)

Description copied from interface: IndexReader

To know what relation the frequency corresponds to, call the method getRelationIndexList.

Specified by:

getRelationFrequencyList in interface IndexReader

Parameters:

docIndex - the index of the document

Returns:

an interger array each elment of which is the frequency of unique relations in the given document

getRelationIndexList

public int[] getRelationIndexList(int docIndex)

Specified by:

getRelationIndexList in interface IndexReader

Parameters:

docIndex - the index of the document

Returns:

an interger array each elment of which is the index of unique relations in the given document

getIRRelation

public IRRelation getIRRelation(int index)

Specified by:

getIRRelation in interface IndexReader

Parameters:

index - the index of the relation

Returns:

the IRRelation object

getIRRelation

public IRRelation getIRRelation(int relationIndex,
                                int docIndex)

Description copied from interface: IndexReader

If the given document does not contain the given relation, this method returns null.

Specified by:

getIRRelation in interface IndexReader

Parameters:

relationIndex - the index of the relation

docIndex - the index of the document

Returns:

the IRRelation object

getRelationDocList

public IRDoc[] getRelationDocList(int relationIndex)

Specified by:

getRelationDocList in interface IndexReader

Parameters:

relationIndex - the index of the relation

Returns:

a list of IRDoc objects which contain the specified relation

getRelationDocFrequencyList

public int[] getRelationDocFrequencyList(int relationIndex)

Specified by:

getRelationDocFrequencyList in interface IndexReader

Parameters:

relationIndex - the index of the relation

Returns:

a list of frequencies the given relation occurs in the documents containing this relation

getRelationDocIndexList

public int[] getRelationDocIndexList(int relationIndex)

Specified by:

getRelationDocIndexList in interface IndexReader

Parameters:

relationIndex - the index of the relation

Returns:

a list of indices of documents containing this relation