org.terrier.structures
Class InvertedIndexInputStream

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

All Implemented Interfaces:

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

Direct Known Subclasses:

BlockInvertedIndexInputStream

public class InvertedIndexInputStream
extends BitPostingIndexInputStream

Reads an InvertedIndex as a stream

Since:

2.0

Author:

Craig Macdonald

Field Summary

Fields inherited from class org.terrier.structures.BitPostingIndexInputStream

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

Constructor Summary

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

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

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

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

Method Summary

int[][]	getNextDocuments() Get the set of documents for the next term
protected int[][]	getNextDocuments(BitIndexPointer pointer) Get the set of documents for the given term pointer

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

Constructor Detail

InvertedIndexInputStream

public InvertedIndexInputStream(Index _index,
                                java.lang.String structureName)
                         throws java.io.IOException

Construct an instance of the class with

Parameters:

_index -

structureName -

Throws:

java.io.IOException

InvertedIndexInputStream

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

Construct an instance of the class with

Parameters:

_index -

structureName -

lexInputStream -

Throws:

java.io.IOException

InvertedIndexInputStream

public InvertedIndexInputStream(Index _index,
                                java.lang.String structureName,
                                java.util.Iterator<? extends Pointer> 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

InvertedIndexInputStream

public InvertedIndexInputStream(Index _index,
                                java.lang.String structureName,
                                java.lang.Class<? extends IterablePosting> _postingIteratorClass)
                         throws java.io.IOException

Construct an instance of the class with

Parameters:

_index -

structureName -

_postingIteratorClass -

Throws:

java.io.IOException

Method Detail

getNextDocuments

public int[][] getNextDocuments()
                         throws java.io.IOException

Get the set of documents for the next term

Throws:

java.io.IOException

getNextDocuments

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

Get the set of documents for the given term pointer

Parameters:

pointer - for the number of documents

Returns:

the integer form of the postings

Throws:

java.io.IOException