org.apache.lucene.search.join

Class ToChildBlockJoinQuery

java.lang.Object

org.apache.lucene.search.Query

org.apache.lucene.search.join.ToChildBlockJoinQuery

public class ToChildBlockJoinQuery
extends Query

Just like ToParentBlockJoinQuery, except this query joins in reverse: you provide a Query matching parent documents and it joins down to child documents.

WARNING: This API is experimental and might change in incompatible ways in the next release.

Constructor Summary

Constructors

Constructor and Description
ToChildBlockJoinQuery(Query parentQuery, BitSetProducer parentsFilter) Create a ToChildBlockJoinQuery.

Method Summary

Modifier and Type	Method and Description
Weight	createWeight(IndexSearcher searcher, boolean needsScores, float boost)
boolean	equals(Object other)
Query	getParentQuery() Return our parent query.
int	hashCode()
Query	rewrite(IndexReader reader)
String	toString(String field)

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

ToChildBlockJoinQuery

public ToChildBlockJoinQuery(Query parentQuery,
                             BitSetProducer parentsFilter)

Create a ToChildBlockJoinQuery.

Parameters:

parentQuery - Query that matches parent documents

parentsFilter - Filter identifying the parent documents.

Method Detail

createWeight

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

Overrides:

createWeight in class Query

Throws:

IOException

getParentQuery

public Query getParentQuery()

Return our parent query.

rewrite

public Query rewrite(IndexReader reader)
              throws IOException

Overrides:

rewrite in class Query

Throws:

IOException

toString

public String toString(String field)

Specified by:

toString in class Query

equals

public boolean equals(Object other)

Specified by:

equals in class Query

hashCode

public int hashCode()

Specified by:

hashCode in class Query