org.terrier.structures
Class BlockInvertedIndexInputStream

java.lang.Object
  org.terrier.structures.BitPostingIndexInputStream
      org.terrier.structures.InvertedIndexInputStream
          org.terrier.structures.BlockInvertedIndexInputStream

All Implemented Interfaces:

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

public class BlockInvertedIndexInputStream
extends InvertedIndexInputStream

Reads a BlockInvertedIndex as a stream

Since:

2.0

Author:

Craig Macdonald

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

BlockInvertedIndexInputStream(Index _index, java.lang.String _structureName)
Construct an instance of the class with

BlockInvertedIndexInputStream(Index _index, java.lang.String _structureName, java.lang.Class<? extends IterablePosting> _postingImplementation)
Construct an instance of the class with

BlockInvertedIndexInputStream(Index _index, java.lang.String structureName, java.util.Iterator<? extends LexiconEntry> lexInputStream)
Construct an instance of the class with

BlockInvertedIndexInputStream(Index _index, java.lang.String structureName, java.util.Iterator<? extends LexiconEntry> lexInputStream, java.lang.Class<? extends IterablePosting> _postingIteratorClass)
Construct an instance of the class with

Method Summary

protected int[][]

getNextDocuments(BitIndexPointer pointer) Get the set of documents for the given term pointer

Methods inherited from class org.terrier.structures.InvertedIndexInputStream

getNextDocuments

Methods inherited from class org.terrier.structures.BitPostingIndexInputStream

_next, close, getCurrentPointer, getDocumentIndex, 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

BlockInvertedIndexInputStream

public BlockInvertedIndexInputStream(Index _index,
                                     java.lang.String _structureName,
                                     java.lang.Class<? extends IterablePosting> _postingImplementation)
                              throws java.io.IOException

Construct an instance of the class with

Parameters:

_index -

_structureName -

_postingImplementation -

Throws:

java.io.IOException

BlockInvertedIndexInputStream

public BlockInvertedIndexInputStream(Index _index,
                                     java.lang.String structureName,
                                     java.util.Iterator<? extends LexiconEntry> lexInputStream,
                                     java.lang.Class<? extends IterablePosting> _postingIteratorClass)
                              throws java.io.IOException

Construct an instance of the class with

Parameters:

_index -

structureName -

lexInputStream -

_postingIteratorClass -

Throws:

java.io.IOException

BlockInvertedIndexInputStream

public BlockInvertedIndexInputStream(Index _index,
                                     java.lang.String structureName,
                                     java.util.Iterator<? extends LexiconEntry> lexInputStream)
                              throws java.io.IOException

Construct an instance of the class with

Parameters:

_index -

structureName -

lexInputStream -

Throws:

java.io.IOException

BlockInvertedIndexInputStream

public BlockInvertedIndexInputStream(Index _index,
                                     java.lang.String _structureName)
                              throws java.io.IOException

Construct an instance of the class with

Parameters:

_index -

_structureName -

Throws:

java.io.IOException

Method Detail

getNextDocuments

protected int[][] getNextDocuments(BitIndexPointer pointer)
                            throws java.io.IOException

Description copied from class: InvertedIndexInputStream

Get the set of documents for the given term pointer

Overrides:

getNextDocuments in class InvertedIndexInputStream

Parameters:

pointer - for the number of documents

Returns:

the integer form of the postings

Throws:

java.io.IOException