Package org.apache.lucene.queries.function

Class FunctionQuery.FunctionWeight

java.lang.Object

org.apache.lucene.search.Weight

org.apache.lucene.queries.function.FunctionQuery.FunctionWeight

All Implemented Interfaces:

SegmentCacheable

Enclosing class:

FunctionQuery

protected class FunctionQuery.FunctionWeight
extends Weight

Creates FunctionQuery scorer instances

Nested Class Summary

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

Weight.DefaultBulkScorer

Field Summary

Fields

Modifier and Type	Field	Description
protected float	boost
protected java.util.Map<java.lang.Object,java.lang.Object>	context
protected IndexSearcher	searcher

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

parentQuery

Constructor Summary

Constructors

Constructor	Description
FunctionWeight(IndexSearcher searcher, float boost)

Method Summary

Modifier and Type	Method	Description
Explanation	explain(LeafReaderContext context, int doc)	An explanation of the score computation for the named document.
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

bulkScorer, count, getQuery, matches, scorerSupplier

Methods inherited from class java.lang.Object

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

Field Detail

searcher

protected final IndexSearcher searcher

boost

protected final float boost

context

protected final java.util.Map<java.lang.Object,java.lang.Object> context

Constructor Detail

FunctionWeight

public FunctionWeight(IndexSearcher searcher,
                      float boost)
               throws java.io.IOException

Throws:

java.io.IOException

Method Detail

scorer

public Scorer scorer(LeafReaderContext context)
              throws java.io.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:

java.io.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 java.io.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:

java.io.IOException - if an IOException occurs