org.apache.lucene.search.spans

Class SpanContainingQuery

java.lang.Object

org.apache.lucene.search.Query

org.apache.lucene.search.spans.SpanQuery

org.apache.lucene.search.spans.SpanContainingQuery

All Implemented Interfaces:

Cloneable

public final class SpanContainingQuery
extends SpanQuery

Keep matches that contain another SpanScorer.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
class	SpanContainingQuery.SpanContainingWeight

Constructor Summary

Constructors

Constructor and Description
SpanContainingQuery(SpanQuery big, SpanQuery little) Construct a SpanContainingQuery matching spans from big that contain at least one spans from little.

Method Summary

Modifier and Type	Method and Description
SpanWeight	createWeight(IndexSearcher searcher, boolean needsScores) Expert: Constructs an appropriate Weight implementation for this query.
boolean	equals(Object other) Override and implement query instance equivalence properly in a subclass.
SpanQuery	getBig()
String	getField() Returns the name of the field matched by this query.
SpanQuery	getLittle()
int	hashCode() Override and implement query hash code properly in a subclass.
Query	rewrite(IndexReader reader) Expert: called to re-write queries into primitive queries.
String	toString(String field) Prints a query to a string, with field assumed to be the default field and omitted.

Methods inherited from class org.apache.lucene.search.spans.SpanQuery

getTermContexts, getTermContexts

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

classHash, sameClassAs, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

SpanContainingQuery

public SpanContainingQuery(SpanQuery big,
                           SpanQuery little)

Construct a SpanContainingQuery matching spans from big that contain at least one spans from little. This query has the boost of big. big and little must be in the same field.

Method Detail

toString

public String toString(String field)

Description copied from class: Query

Prints a query to a string, with field assumed to be the default field and omitted.

Specified by:

toString in class Query

createWeight

public SpanWeight createWeight(IndexSearcher searcher,
                               boolean needsScores)
                        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.

Specified by:

createWeight in class SpanQuery

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

Throws:

IOException

getField

public String getField()

Description copied from class: SpanQuery

Returns the name of the field matched by this query.

Specified by:

getField in class SpanQuery

getBig

public SpanQuery getBig()

getLittle

public SpanQuery getLittle()

rewrite

public Query rewrite(IndexReader reader)
              throws IOException

Description copied from class: Query

Expert: called to re-write queries into primitive queries. For example, a PrefixQuery will be rewritten into a BooleanQuery that consists of TermQuerys.

Overrides:

rewrite in class Query

Throws:

IOException

equals

public boolean equals(Object other)

Description copied from class: Query

Override and implement query instance equivalence properly in a subclass. This is required so that QueryCache works properly. Typically a query will be equal to another only if it's an instance of the same class and its document-filtering properties are identical that other instance. Utility methods are provided for certain repetitive code.

Specified by:

equals in class Query

See Also:

Query.sameClassAs(Object), Query.classHash()

hashCode

public int hashCode()

Description copied from class: Query

Override and implement query hash code properly in a subclass. This is required so that QueryCache works properly.

Specified by:

hashCode in class Query

See Also:

Query.equals(Object)