org.terrier.applications

Class TRECIndexing

java.lang.Object

org.terrier.applications.BatchIndexing

org.terrier.applications.TRECIndexing

Direct Known Subclasses:

TRECIndexingSinglePass

public class TRECIndexing
extends BatchIndexing

This class creates the indices for a test collection.

Properties:

• trec.indexer.class - name of the class to use as the indexer. This only applies to the Index method.
• trec.collection.class - name of the class to use as the Collection.

Author:

Gianni Amati, Vassilis Plachouras, Ben He, Craig Macdonald

Nested Class Summary

Nested classes/interfaces inherited from class org.terrier.applications.BatchIndexing

BatchIndexing.Command

Field Summary

Fields

Modifier and Type	Field and Description
protected Collection	collectionTREC The collection to index.

Fields inherited from class org.terrier.applications.BatchIndexing

blocks, logger, path, prefix

Constructor Summary

Constructors

Constructor and Description
TRECIndexing() A default constructor that initialised the data structures to use for indexing.
TRECIndexing(String _path, String _prefix)
TRECIndexing(String _path, String _prefix, Collection c) A constructor that initialised the data structures to use for indexing.
TRECIndexing(String _path, String _prefix, String collectionSpec) A constructor that initialised the data structures to use for indexing.

Method Summary

Modifier and Type	Method and Description
void	index() Calls the method index(Collection[]) of the class Indexer in order to build the data structures for a set of collections.
protected Collection	loadCollection(String collectionSpec)
protected Indexer	loadIndexer(String pa, String pr)
static void	main(String[] args) Used for testing purposes.

Methods inherited from class java.lang.Object

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

Field Detail

collectionTREC

protected Collection collectionTREC

The collection to index.

Constructor Detail

TRECIndexing

public TRECIndexing(String _path,
                    String _prefix)

TRECIndexing

public TRECIndexing(String _path,
                    String _prefix,
                    String collectionSpec)

A constructor that initialised the data structures to use for indexing.

Parameters:

_path - Absolute path to where the index should be created

_prefix - Prefix of the index files, usually "data"

TRECIndexing

public TRECIndexing(String _path,
                    String _prefix,
                    Collection c)

A constructor that initialised the data structures to use for indexing.

Parameters:

_path - Absolute path to where the index should be created

_prefix - Prefix of the index files, usually "data"

TRECIndexing

public TRECIndexing()

A default constructor that initialised the data structures to use for indexing.

Method Detail

loadCollection

protected Collection loadCollection(String collectionSpec)

loadIndexer

protected Indexer loadIndexer(String pa,
                              String pr)

index

public void index()

Calls the method index(Collection[]) of the class Indexer in order to build the data structures for a set of collections. This particular method of the Indexer uses a set of builders for a subset of the collection and builds separate data structures, which are later merged.

Specified by:

index in class BatchIndexing

main

public static void main(String[] args)

Used for testing purposes.

Parameters:

args - the command line arguments.