org.terrier.structures.outputformat

Class LETOROutputFormat

java.lang.Object

org.terrier.structures.outputformat.LETOROutputFormat

All Implemented Interfaces:

OutputFormat

Direct Known Subclasses:

Normalised2LETOROutputFormat, NormalisedLETOROutputFormat

public class LETOROutputFormat
extends Object
implements OutputFormat

Outputs a featured result set in the LETOR format. If the resultset is not featured, then only the score (and docid) are output as features. NB: This class uses Double.toString() to render document scores and feature values, as this canonical output is easier to obtain and more precise than %f without any decimal places noted. Moreover, it will not display unnecessary ending zeros.

Since:

4.0

Author:

Rodrygo Santos

See Also:

http://research.microsoft.com/en-us/um/beijing/projects/letor/

Field Summary

Fields

Modifier and Type	Field and Description
protected boolean	display_docids
protected boolean	display_docnos
protected boolean	display_scores
protected boolean	feature_docids
protected int	fOffset
protected HashSet<String>	seenQueries
protected boolean	test

Constructor Summary

Constructors

Constructor and Description
LETOROutputFormat(Index index)

Method Summary

Methods

Modifier and Type	Method and Description
protected void	printHeader(PrintWriter pw, FeaturedResultSet rs)
void	printResults(PrintWriter pw, SearchRequest q, String method, String iteration, int numberOfResults) Outputs the results of query q to PrintWriter pw, described by the method, iteration, and the specified limit on the number of results (0 means no limit).

Methods inherited from class java.lang.Object

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

Field Detail

seenQueries

protected HashSet<String> seenQueries

test

protected boolean test

display_scores

protected boolean display_scores

feature_docids

protected boolean feature_docids

display_docids

protected boolean display_docids

display_docnos

protected boolean display_docnos

fOffset

protected int fOffset

Constructor Detail

LETOROutputFormat

public LETOROutputFormat(Index index)

Method Detail

printResults

public void printResults(PrintWriter pw,
                SearchRequest q,
                String method,
                String iteration,
                int numberOfResults)
                  throws IOException

Description copied from interface: OutputFormat

Outputs the results of query q to PrintWriter pw, described by the method, iteration, and the specified limit on the number of results (0 means no limit).

Specified by:

printResults in interface OutputFormat

Throws:

IOException

printHeader

protected void printHeader(PrintWriter pw,
               FeaturedResultSet rs)