org.apache.lucene.search

Class AssertingQuery

java.lang.Object

org.apache.lucene.search.Query

org.apache.lucene.search.AssertingQuery

public final class AssertingQuery
extends Query

Assertion-enabled query.

Constructor Summary

Constructors

Constructor and Description
AssertingQuery(java.util.Random random, Query in) Sole constructor.

Method Summary

Modifier and Type	Method and Description
Weight	createWeight(IndexSearcher searcher, boolean needsScores, float boost) 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.
Query	getIn()
java.util.Random	getRandom()
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.
static Query	wrap(java.util.Random random, Query query) Wrap a query if necessary.

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

AssertingQuery

public AssertingQuery(java.util.Random random,
                      Query in)

Sole constructor.

Method Detail

wrap

public static Query wrap(java.util.Random random,
                         Query query)

Wrap a query if necessary.

createWeight

public Weight createWeight(IndexSearcher searcher,
                           boolean needsScores,
                           float boost)
                    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.

Overrides:

createWeight in class Query

needsScores - True if document scores (Scorer.score()) are needed.

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

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)

getRandom

public java.util.Random getRandom()

getIn

public Query getIn()

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