org.apache.lucene.search.spans

Class SpanQuery

java.lang.Object

org.apache.lucene.search.Query

org.apache.lucene.search.spans.SpanQuery

Direct Known Subclasses:

FieldMaskingSpanQuery, SpanBoostQuery, SpanContainingQuery, SpanMultiTermQueryWrapper, SpanNearQuery, SpanNotQuery, SpanOrQuery, SpanPositionCheckQuery, SpanTermQuery, SpanWithinQuery

public abstract class SpanQuery
extends Query

Base class for span-based queries.

Constructor Summary

Constructors

Constructor and Description
SpanQuery()

Method Summary

Modifier and Type	Method and Description
abstract SpanWeight	createWeight(IndexSearcher searcher, boolean needsScores, float boost) Expert: Constructs an appropriate Weight implementation for this query.
abstract String	getField() Returns the name of the field matched by this query.
static Map<Term,TermContext>	getTermContexts(Collection<SpanWeight> weights) Build a map of terms to termcontexts, for use in constructing SpanWeights
static Map<Term,TermContext>	getTermContexts(SpanWeight... weights) Build a map of terms to termcontexts, for use in constructing SpanWeights

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

classHash, equals, hashCode, rewrite, sameClassAs, toString, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

SpanQuery

public SpanQuery()

Method Detail

getField

public abstract String getField()

Returns the name of the field matched by this query.

createWeight

public abstract SpanWeight createWeight(IndexSearcher searcher,
                                        boolean needsScores,
                                        float boost)
                                 throws IOException

Description copied from class: Query

Expert: Constructs an appropriate Weight implementation for this query.

Only implemented by primitive queries, which re-write to themselves.

Overrides:

createWeight in class Query

needsScores - True if document scores (Scorer.score()) or match frequencies (Scorer.freq()) are needed.

boost - The boost that is propagated by the parent queries.

Throws:

IOException

getTermContexts

public static Map<Term,TermContext> getTermContexts(SpanWeight... weights)

Build a map of terms to termcontexts, for use in constructing SpanWeights

NOTE: This API is for internal purposes only and might change in incompatible ways in the next release.

getTermContexts

public static Map<Term,TermContext> getTermContexts(Collection<SpanWeight> weights)

Build a map of terms to termcontexts, for use in constructing SpanWeights

NOTE: This API is for internal purposes only and might change in incompatible ways in the next release.