org.apache.lucene.search.join

Class ParentChildrenBlockJoinQuery

java.lang.Object

org.apache.lucene.search.Query

org.apache.lucene.search.join.ParentChildrenBlockJoinQuery

public class ParentChildrenBlockJoinQuery
extends Query

A query that returns all the matching child documents for a specific parent document indexed together in the same block. The provided child query determines which matching child doc is being returned.

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

Constructor Summary

Constructors

Constructor and Description
ParentChildrenBlockJoinQuery(BitSetProducer parentFilter, Query childQuery, int parentDocId) Creates a ParentChildrenBlockJoinQuery instance

Method Summary

Modifier and Type	Method and Description
Weight	createWeight(IndexSearcher searcher, boolean needsScores)
boolean	equals(Object obj)
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

ParentChildrenBlockJoinQuery

public ParentChildrenBlockJoinQuery(BitSetProducer parentFilter,
                                    Query childQuery,
                                    int parentDocId)

Creates a ParentChildrenBlockJoinQuery instance

Parameters:

parentFilter - A filter identifying parent documents.

childQuery - A child query that determines which child docs are matching

parentDocId - The top level doc id of that parent to return children documents for

Method Detail

equals

public boolean equals(Object obj)

Specified by:

equals in class Query

hashCode

public int hashCode()

Specified by:

hashCode in class Query

toString

public String toString(String field)

Specified by:

toString in class Query

rewrite

public Query rewrite(IndexReader reader)
              throws IOException

Overrides:

rewrite in class Query

Throws:

IOException

createWeight

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

Overrides:

createWeight in class Query

Throws:

IOException