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:

Closeable, IterablePosting, Posting

Direct Known Subclasses:

ArrayOfFieldIterablePosting

public class ArrayOfBasicIterablePosting
extends ArrayOfIdsIterablePosting

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

Author:

Craig Macdonald

Field Summary

protected int[]	doclens
protected int[]	frequencies frequencies of all of the stored postings

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

ids, indice

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

EOL

Constructor Summary

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

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

Method Summary

int	getDocumentLength() Return the length of the document for this posting.
int	getFrequency() Return the frequency of the term in the current document

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

asWritablePosting, close, endOfPostings, getId, next, setId

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

next

Methods inherited from class java.lang.Object

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

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

Specified by:

getFrequency in interface Posting

Overrides:

getFrequency in class ArrayOfIdsIterablePosting

Returns:

frequency of posting, in tokens

getDocumentLength

public int getDocumentLength()

Description copied from class: ArrayOfIdsIterablePosting

Return the length of the document for this posting. 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.