org.apache.lucene.search.spans

Class SpanOrQuery

java.lang.Object

org.apache.lucene.search.Query

org.apache.lucene.search.spans.SpanQuery

org.apache.lucene.search.spans.SpanOrQuery

public final class SpanOrQuery
extends SpanQuery

Matches the union of its clauses.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
class	SpanOrQuery.SpanOrWeight

Field Summary

Fields

Modifier and Type	Field and Description
private java.util.List<SpanQuery>	clauses
private java.lang.String	field

Constructor Summary

Constructors

Constructor and Description
SpanOrQuery(SpanQuery... clauses) Construct a SpanOrQuery merging the provided clauses.

Method Summary

Modifier and Type	Method and Description
private void	addClause(SpanQuery clause) Adds a clause to this query
SpanWeight	createWeight(IndexSearcher searcher, boolean needsScores) Expert: Constructs an appropriate Weight implementation for this query.
boolean	equals(java.lang.Object other) Override and implement query instance equivalence properly in a subclass.
SpanQuery[]	getClauses() Return the clauses whose spans are matched.
java.lang.String	getField() Returns the name of the field matched by this query.
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.
java.lang.String	toString(java.lang.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

Field Detail

clauses

private java.util.List<SpanQuery> clauses

field

private java.lang.String field

Constructor Detail

SpanOrQuery

public SpanOrQuery(SpanQuery... clauses)

Construct a SpanOrQuery merging the provided clauses. All clauses must have the same field.

Method Detail

addClause

private final void addClause(SpanQuery clause)

Adds a clause to this query

getClauses

public SpanQuery[] getClauses()

Return the clauses whose spans are matched.

getField

public java.lang.String getField()

Description copied from class: SpanQuery

Returns the name of the field matched by this query.

Specified by:

getField in class SpanQuery

rewrite

public Query rewrite(IndexReader reader)
              throws java.io.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:

java.io.IOException

toString

public java.lang.String toString(java.lang.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

equals

public boolean equals(java.lang.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)

createWeight

public SpanWeight createWeight(IndexSearcher searcher,
                               boolean needsScores)
                        throws java.io.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:

java.io.IOException