Package org.terrier.structures.postings

Class ArrayOfBasicIterablePosting

java.lang.Object

org.terrier.structures.postings.IterablePostingImpl

org.terrier.structures.postings.ArrayOfIdsIterablePosting

org.terrier.structures.postings.ArrayOfBasicIterablePosting

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable, java.lang.Cloneable, IterablePosting, Posting

Direct Known Subclasses:

ArrayOfBlockIterablePosting, ArrayOfFieldIterablePosting

public class ArrayOfBasicIterablePosting
extends ArrayOfIdsIterablePosting

An instance of IterablePostings that works with passed arrays of ids and frequencies

Author:

Craig Macdonald

Field Summary

Fields

Modifier and Type	Field	Description
protected int[]	doclens
protected int[]	frequencies	frequencies of all of the stored postings

Fields inherited from class org.terrier.structures.postings.ArrayOfIdsIterablePosting

id, ids, indice

Fields inherited from interface org.terrier.structures.postings.IterablePosting

END_OF_LIST, EOL

Constructor Summary

Constructors

Constructor	Description
ArrayOfBasicIterablePosting(int[] _ids, int[] _freqs)	Make a new posting list with these ids and frequencies
ArrayOfBasicIterablePosting(int[] _ids, int[] _freqs, int[] _lens)

Method Summary

Modifier and Type	Method	Description
int	getDocumentLength()	Return the length of the document of the current posting in tokens.
int	getFrequency()	Return the frequency of the term in the current document, in tokens.

Methods inherited from class org.terrier.structures.postings.ArrayOfIdsIterablePosting

asWritablePosting, clone, close, endOfPostings, getId, next, reset

Methods inherited from class org.terrier.structures.postings.IterablePostingImpl

next

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.terrier.structures.postings.Posting

setId

Field Detail

frequencies

protected int[] frequencies

frequencies of all of the stored postings

doclens

protected int[] doclens

Constructor Detail

ArrayOfBasicIterablePosting

public ArrayOfBasicIterablePosting(int[] _ids,
                                   int[] _freqs)

Make a new posting list with these ids and frequencies

ArrayOfBasicIterablePosting

public ArrayOfBasicIterablePosting(int[] _ids,
                                   int[] _freqs,
                                   int[] _lens)

Method Detail

getFrequency

public int getFrequency()

Return the frequency of the term in the current document, in tokens.

Specified by:

getFrequency in interface Posting

Overrides:

getFrequency in class ArrayOfIdsIterablePosting

Returns:

frequency of the term in the current document, in tokens.

getDocumentLength

public int getDocumentLength()

Description copied from class: ArrayOfIdsIterablePosting

Return the length of the document of the current posting in tokens. Usually uses the DocumentIndex, may do otherwise if document length statistics are in posting list. Returns 0.

Specified by:

getDocumentLength in interface Posting

Overrides:

getDocumentLength in class ArrayOfIdsIterablePosting

Returns:

length of the document of the current posting in tokens.