Package org.apache.solr.ltr.feature

Class OriginalScoreFeature

java.lang.Object

org.apache.lucene.search.Query

org.apache.solr.ltr.feature.Feature

org.apache.solr.ltr.feature.OriginalScoreFeature

All Implemented Interfaces:

org.apache.lucene.util.Accountable

public class OriginalScoreFeature
extends Feature

This feature returns the original score that the document had before performing the reranking. Example configuration:

 {
   "name":  "originalScore",
   "class": "org.apache.solr.ltr.feature.OriginalScoreFeature",
   "params": { }
 }
 

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
class	OriginalScoreFeature.OriginalScoreWeight

Nested classes/interfaces inherited from class org.apache.solr.ltr.feature.Feature

Feature.FeatureWeight

Field Summary

Fields inherited from class org.apache.solr.ltr.feature.Feature

name

Fields inherited from interface org.apache.lucene.util.Accountable

NULL_ACCOUNTABLE

Constructor Summary

Constructors

Constructor	Description
OriginalScoreFeature(String name, Map<String,Object> params)

Method Summary

Modifier and Type	Method	Description
OriginalScoreFeature.OriginalScoreWeight	createWeight(org.apache.lucene.search.IndexSearcher searcher, boolean needsScores, SolrQueryRequest request, org.apache.lucene.search.Query originalQuery, Map<String,String[]> efi)
LinkedHashMap<String,Object>	paramsToMap()
protected void	validate()	As part of creation of a feature instance, this function confirms that the feature parameters are valid.

Methods inherited from class org.apache.solr.ltr.feature.Feature

defaultParamsToMap, equals, getDefaultValue, getIndex, getInstance, getName, hashCode, ramBytesUsed, setDefaultValue, setIndex, toString, visit

Methods inherited from class org.apache.lucene.search.Query

classHash, createWeight, rewrite, rewrite, sameClassAs, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.lucene.util.Accountable

getChildResources

Constructor Detail

OriginalScoreFeature

public OriginalScoreFeature(String name,
                            Map<String,Object> params)

Method Detail

paramsToMap

public LinkedHashMap<String,Object> paramsToMap()

Specified by:

paramsToMap in class Feature

validate

protected void validate()
                 throws FeatureException

Description copied from class: Feature

As part of creation of a feature instance, this function confirms that the feature parameters are valid.

Specified by:

validate in class Feature

Throws:

FeatureException - Feature Exception

createWeight

public OriginalScoreFeature.OriginalScoreWeight createWeight(org.apache.lucene.search.IndexSearcher searcher,
                                                             boolean needsScores,
                                                             SolrQueryRequest request,
                                                             org.apache.lucene.search.Query originalQuery,
                                                             Map<String,String[]> efi)
                                                      throws IOException

Specified by:

createWeight in class Feature

Throws:

IOException