Package org.apache.solr.ltr.interleaving

Class LTRInterleavingRescorer

java.lang.Object

org.apache.lucene.search.Rescorer

org.apache.solr.ltr.LTRRescorer

org.apache.solr.ltr.interleaving.LTRInterleavingRescorer

public class LTRInterleavingRescorer
extends LTRRescorer

Implements the rescoring logic. The top documents returned by solr with their original scores, will be processed by a LTRScoringQuery that will assign a new score to each document. The top documents will be resorted based on the new score.

Field Summary

Fields inherited from class org.apache.solr.ltr.LTRRescorer

scoreComparator

Constructor Summary

Constructors

Constructor	Description
LTRInterleavingRescorer(Interleaving interleavingAlgorithm, LTRInterleavingScoringQuery[] rerankingQueries)

Method Summary

Modifier and Type	Method	Description
org.apache.lucene.search.Explanation	explain(org.apache.lucene.search.IndexSearcher searcher, org.apache.lucene.search.Explanation firstPassExplanation, int docID)
org.apache.lucene.search.TopDocs	rescore(org.apache.lucene.search.IndexSearcher searcher, org.apache.lucene.search.TopDocs firstPassTopDocs, int topN)	rescores the documents:
void	scoreFeatures(org.apache.lucene.search.IndexSearcher indexSearcher, int topN, LTRScoringQuery.ModelWeight[] modelWeights, org.apache.lucene.search.ScoreDoc[] hits, List<org.apache.lucene.index.LeafReaderContext> leaves, org.apache.lucene.search.ScoreDoc[][] rerankedPerModel)

Methods inherited from class org.apache.solr.ltr.LTRRescorer

extractFeaturesInfo, getExplanation, getFirstPassDocsRanked, heapAdjust, heapify, logSingleHit, scoreFeatures, scoreSingleHit

Methods inherited from class java.lang.Object

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

Constructor Detail

LTRInterleavingRescorer

public LTRInterleavingRescorer(Interleaving interleavingAlgorithm,
                               LTRInterleavingScoringQuery[] rerankingQueries)

Method Detail

rescore

public org.apache.lucene.search.TopDocs rescore(org.apache.lucene.search.IndexSearcher searcher,
                                                org.apache.lucene.search.TopDocs firstPassTopDocs,
                                                int topN)
                                         throws IOException

rescores the documents:

Overrides:

rescore in class LTRRescorer

Parameters:

searcher - current IndexSearcher

firstPassTopDocs - documents to rerank;

topN - documents to return;

Throws:

IOException

scoreFeatures

public void scoreFeatures(org.apache.lucene.search.IndexSearcher indexSearcher,
                          int topN,
                          LTRScoringQuery.ModelWeight[] modelWeights,
                          org.apache.lucene.search.ScoreDoc[] hits,
                          List<org.apache.lucene.index.LeafReaderContext> leaves,
                          org.apache.lucene.search.ScoreDoc[][] rerankedPerModel)
                   throws IOException

Throws:

IOException

explain

public org.apache.lucene.search.Explanation explain(org.apache.lucene.search.IndexSearcher searcher,
                                                    org.apache.lucene.search.Explanation firstPassExplanation,
                                                    int docID)
                                             throws IOException

Overrides:

explain in class LTRRescorer

Throws:

IOException