uk.ac.gla.terrier.applications
Class TRECQueryingExpansion

java.lang.Object
  uk.ac.gla.terrier.applications.TRECQuerying
      uk.ac.gla.terrier.applications.TRECQueryingExpansion

public class TRECQueryingExpansion
extends TRECQuerying

This class performs a batch mode retrieval for a set of TREC queries using query expansion.

Properties

c.post The term frequency normalisation parameter value used in the second-pass retrieval.

Version:

$Revision: 1.52 $

Author:

Gianni Amati, Ben He, Vassilis Plachouras

Constructor Summary

TRECQueryingExpansion()
TRECQueryingExpansion default constructor.

TRECQueryingExpansion(Index i)
TRECQueryExpansion - Index constructor.

Method Summary

java.lang.String	processQueries(double c, boolean c_set) Performs the matching using the specified weighting model from the setup.
SearchRequest	processQuery(java.lang.String queryId, java.lang.String query, double cParameter, boolean c_set) According to the given parameters, it sets up the correct matching class.

Methods inherited from class uk.ac.gla.terrier.applications.TRECQuerying

close, getIndex, getManager, getResultFile, printResults, printSettings, processQueries, processQueries, processQuery, processQuery, setIndex

Methods inherited from class java.lang.Object

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

Constructor Detail

TRECQueryingExpansion

public TRECQueryingExpansion()

TRECQueryingExpansion default constructor. Calls super().

TRECQueryingExpansion

public TRECQueryingExpansion(Index i)

TRECQueryExpansion - Index constructor. Calls super(Index).

Method Detail

processQuery

public SearchRequest processQuery(java.lang.String queryId,
                                  java.lang.String query,
                                  double cParameter,
                                  boolean c_set)

According to the given parameters, it sets up the correct matching class.

Overrides:

processQuery in class TRECQuerying

Parameters:

queryId - the identifier of a query.

query - the query to process

cParameter - double the term frequency normalisation parameter value

c_set - specifies whether the given value for the parameter c should be used.

processQueries

public java.lang.String processQueries(double c,
                                       boolean c_set)

Performs the matching using the specified weighting model from the setup. It parses the file with the queries (the name of the file is defined in the address_query file), creates the file of results, and for each query, gets the relevant documents, scores them, and outputs the results to the result file.

Overrides:

processQueries in class TRECQuerying

Parameters:

c - the value of the document length normalisation parameter.

c_set - boolean specifies whether the value of the parameter c is specified.

Returns:

String the filename that the results have been written to