org.terrier.structures
Class BlockDirectIndexInputStream

java.lang.Object
  org.terrier.structures.BitPostingIndexInputStream
      org.terrier.structures.DirectIndexInputStream
          org.terrier.structures.BlockDirectIndexInputStream

All Implemented Interfaces:

java.io.Closeable, java.util.Iterator<IterablePosting>, PostingIndexInputStream, Skipable

public class BlockDirectIndexInputStream
extends DirectIndexInputStream

This class reads the block field direct index structure sequentially, as an input stream.

Author:

Douglas Johnson, Vassilis Plachouras

See Also:

BlockDirectIndex

Field Summary

protected int

DocumentBlockCountDelta

Fields inherited from class org.terrier.structures.BitPostingIndexInputStream

currentEntryCount, currentFile, currentPointer, doi, entriesSkipped, fieldCount, file, fileCount, index, logger, pointerList, postingConstructor, postingIteratorClass, structureName

Constructor Summary

BlockDirectIndexInputStream(Index index, java.lang.String structureName)
Constructs an index of the class with

BlockDirectIndexInputStream(Index index, java.lang.String structureName, java.lang.Class<? extends IterablePosting> postingClass)
Constructs an index of the class with

Method Summary

int[][]

getNextTerms(BitIndexPointer pointer) Get the terms for the next document at the pointer specified

Methods inherited from class org.terrier.structures.DirectIndexInputStream

getDocumentIndex, getNextTerms

Methods inherited from class org.terrier.structures.BitPostingIndexInputStream

_next, close, getCurrentPointer, getEntriesSkipped, getFilename, getFilename, getNextPostings, getNumberOfCurrentPostings, getPos, hasNext, loadPostingIterator, next, print, remove, skip

Methods inherited from class java.lang.Object

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

Field Detail

DocumentBlockCountDelta

protected int DocumentBlockCountDelta

Constructor Detail

BlockDirectIndexInputStream

public BlockDirectIndexInputStream(Index index,
                                   java.lang.String structureName)
                            throws java.io.IOException

Constructs an index of the class with

Parameters:

index -

structureName -

Throws:

java.io.IOException

BlockDirectIndexInputStream

public BlockDirectIndexInputStream(Index index,
                                   java.lang.String structureName,
                                   java.lang.Class<? extends IterablePosting> postingClass)
                            throws java.io.IOException

Constructs an index of the class with

Parameters:

index -

structureName -

postingClass -

Throws:

java.io.IOException

Method Detail

getNextTerms

public int[][] getNextTerms(BitIndexPointer pointer)
                     throws java.io.IOException

Get the terms for the next document at the pointer specified

Overrides:

getNextTerms in class DirectIndexInputStream

Throws:

java.io.IOException