uk.ac.gla.terrier.indexing.hadoop
Class Hadoop_BlockSinglePassIndexer

java.lang.Object
  uk.ac.gla.terrier.indexing.Indexer
      uk.ac.gla.terrier.indexing.BasicIndexer
          uk.ac.gla.terrier.indexing.BasicSinglePassIndexer
              uk.ac.gla.terrier.indexing.hadoop.Hadoop_BasicSinglePassIndexer
                  uk.ac.gla.terrier.indexing.hadoop.Hadoop_BlockSinglePassIndexer

All Implemented Interfaces:

java.io.Closeable, org.apache.hadoop.mapred.JobConfigurable, org.apache.hadoop.mapred.Mapper<org.apache.hadoop.io.Text,Wrapper<Document>,MapEmittedTerm,MapEmittedPostingList>, org.apache.hadoop.mapred.Reducer<MapEmittedTerm,MapEmittedPostingList,java.lang.Object,java.lang.Object>

public class Hadoop_BlockSinglePassIndexer
extends Hadoop_BasicSinglePassIndexer

A MapReduce single-pass indexer that records term positions (blocks). All normal block properties are supported. For more information, see BlockIndexer.

Since:

2.2

Version:

$Revision: 1.3 $

Author:

Richard McCreadie, Craig Macdonald and Rodrygo Santos

Constructor Summary

Hadoop_BlockSinglePassIndexer()
Constructs an instance of this class, where the created data structures are stored in the given path.

Method Summary

void	createMemoryPostings() Hook method that creates the right type of MemoryPostings class.

Methods inherited from class uk.ac.gla.terrier.indexing.hadoop.Hadoop_BasicSinglePassIndexer

close, configure, map, reduce, startReduce

Methods inherited from class uk.ac.gla.terrier.indexing.BasicSinglePassIndexer

createDirectIndex, createInvertedIndex, createInvertedIndex, performMultiWayMerge

Methods inherited from class uk.ac.gla.terrier.indexing.Indexer

index, isUTFIndexing, main, merge, merge, useFieldInformation

Methods inherited from class java.lang.Object

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

Constructor Detail

Hadoop_BlockSinglePassIndexer

public Hadoop_BlockSinglePassIndexer()

Constructs an instance of this class, where the created data structures are stored in the given path.

Method Detail

createMemoryPostings

public void createMemoryPostings()

Description copied from class: BasicSinglePassIndexer

Hook method that creates the right type of MemoryPostings class.