uk.ac.gla.terrier.structures.merging
Class BlockStructureMerger

java.lang.Object
  uk.ac.gla.terrier.structures.merging.StructureMerger
      uk.ac.gla.terrier.structures.merging.BlockStructureMerger

public class BlockStructureMerger
extends StructureMerger

This class merges two sets of data structures (ie direct index, inverted index, document index, lexicon and statistics), created by Terrier with position information (blocks) and possibly field information, into one set of data structures.

Version:

$Revision: 1.17 $

Author:

Vassilis Plachouras

See Also:

StructureMerger

Constructor Summary

BlockStructureMerger(java.lang.String _filename1, java.lang.String _filename2)
A constructor that sets the filenames of the inverted files to merge

Method Summary

static void	main(java.lang.String[] args) usage: java uk.ac.gla.terrier.structures.merging.BlockStructureMerger [binary bits] [inverted file 1] [inverted file 2] [output inverted file]
static void	writeBlockPostings(int[][] postings, int firstId, BitOutputStream output, int binaryBits)
static void	writeFieldPostings(int[][] postings, int firstId, BitOutputStream output, int binaryBits)
static void	writeNoFieldPostings(int[][] postings, int firstId, BitOutputStream output)

Methods inherited from class uk.ac.gla.terrier.structures.merging.StructureMerger

mergeStructures, setNumberOfBits, setOutputFilename, writePostings

Methods inherited from class java.lang.Object

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

Constructor Detail

BlockStructureMerger

public BlockStructureMerger(java.lang.String _filename1,
                            java.lang.String _filename2)

A constructor that sets the filenames of the inverted files to merge

Parameters:

_filename1 - the first inverted file to merge

_filename2 - the second inverted file to merge

Method Detail

writeBlockPostings

public static void writeBlockPostings(int[][] postings,
                                      int firstId,
                                      BitOutputStream output,
                                      int binaryBits)
                               throws java.io.IOException

Throws:

java.io.IOException

writeFieldPostings

public static void writeFieldPostings(int[][] postings,
                                      int firstId,
                                      BitOutputStream output,
                                      int binaryBits)
                               throws java.io.IOException

Throws:

java.io.IOException

writeNoFieldPostings

public static void writeNoFieldPostings(int[][] postings,
                                        int firstId,
                                        BitOutputStream output)
                                 throws java.io.IOException

Throws:

java.io.IOException

main

public static void main(java.lang.String[] args)

usage: java uk.ac.gla.terrier.structures.merging.BlockStructureMerger [binary bits] [inverted file 1] [inverted file 2] [output inverted file]