Module org.apache.lucene.core

Package org.apache.lucene.search

Class IndriAndWeight

java.lang.Object

org.apache.lucene.search.Weight

org.apache.lucene.search.IndriAndWeight

All Implemented Interfaces:

SegmentCacheable

public class IndriAndWeight
extends Weight

The Weight for IndriAndQuery, used to normalize, score and explain these queries.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.lucene.search.Weight

Weight.DefaultBulkScorer

Field Summary

Fields

Modifier and Type	Field	Description
private final float	boost
private final IndriAndQuery	query
private final ScoreMode	scoreMode
private final ArrayList<Weight>	weights

Fields inherited from class org.apache.lucene.search.Weight

parentQuery

Constructor Summary

Constructors

Constructor	Description
IndriAndWeight(IndriAndQuery query, IndexSearcher searcher, ScoreMode scoreMode, float boost)

Method Summary

Modifier and Type	Method	Description
BulkScorer	bulkScorer(LeafReaderContext context)	Optional method, to return a BulkScorer to score the query and send hits to a Collector.
Explanation	explain(LeafReaderContext context, int doc)	An explanation of the score computation for the named document.
private Scorer	getScorer(LeafReaderContext context)
boolean	isCacheable(LeafReaderContext ctx)
Scorer	scorer(LeafReaderContext context)	Returns a Scorer which can iterate in order over all matching documents and assign them a score.

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

count, getQuery, matches, scorerSupplier

Methods inherited from class java.lang.Object

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

Field Details

query

private final IndriAndQuery query

weights

private final ArrayList<Weight> weights

scoreMode

private final ScoreMode scoreMode

boost

private final float boost

Constructor Details

IndriAndWeight

public IndriAndWeight(IndriAndQuery query,
 IndexSearcher searcher,
 ScoreMode scoreMode,
 float boost)
               throws IOException

Throws:

IOException

Method Details

getScorer

private Scorer getScorer(LeafReaderContext context)
                  throws IOException

Throws:

IOException

scorer

public Scorer scorer(LeafReaderContext context)
              throws IOException

Description copied from class: Weight

Returns a Scorer which can iterate in order over all matching documents and assign them a score.

NOTE: null can be returned if no documents will be scored by this query.

NOTE: The returned Scorer does not have LeafReader.getLiveDocs() applied, they need to be checked on top.

Specified by:

scorer in class Weight

Parameters:

context - the LeafReaderContext for which to return the Scorer.

Returns:

a Scorer which scores documents in/out-of order.

Throws:

IOException - if there is a low-level I/O error

bulkScorer

public BulkScorer bulkScorer(LeafReaderContext context)
                      throws IOException

Description copied from class: Weight

Optional method, to return a BulkScorer to score the query and send hits to a Collector. Only queries that have a different top-level approach need to override this; the default implementation pulls a normal Scorer and iterates and collects the resulting hits which are not marked as deleted.

Overrides:

bulkScorer in class Weight

Parameters:

context - the LeafReaderContext for which to return the Scorer.

Returns:

a BulkScorer which scores documents and passes them to a collector.

Throws:

IOException - if there is a low-level I/O error

isCacheable

public boolean isCacheable(LeafReaderContext ctx)

Returns:

true if the object can be cached against a given leaf

explain

public Explanation explain(LeafReaderContext context,
 int doc)
                    throws IOException

Description copied from class: Weight

An explanation of the score computation for the named document.

Specified by:

explain in class Weight

Parameters:

context - the readers context to create the Explanation for.

doc - the document's id relative to the given context's reader

Returns:

an Explanation for the score

Throws:

IOException - if an IOException occurs