org.apache.lucene.search.join
Class ToChildBlockJoinQuery

java.lang.Object
  org.apache.lucene.search.Query
      org.apache.lucene.search.join.ToChildBlockJoinQuery

All Implemented Interfaces:

Cloneable

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

ToChildBlockJoinQuery(Query parentQuery, Filter parentsFilter, boolean doScores)
Create a ToChildBlockJoinQuery.

Method Summary

ToChildBlockJoinQuery	clone()
Weight	createWeight(IndexSearcher searcher)
boolean	equals(Object _other)
void	extractTerms(Set<Term> terms)
int	hashCode()
Query	rewrite(IndexReader reader)
String	toString(String field)

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

getBoost, setBoost, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

ToChildBlockJoinQuery

public ToChildBlockJoinQuery(Query parentQuery,
                             Filter parentsFilter,
                             boolean doScores)

Create a ToChildBlockJoinQuery.

Parameters:

parentQuery - Query that matches parent documents

parentsFilter - Filter (must produce FixedBitSet per-segment) identifying the parent documents.

doScores - true if parent scores should be calculated

Method Detail

createWeight

public Weight createWeight(IndexSearcher searcher)
                    throws IOException

Overrides:

createWeight in class Query

Throws:

IOException

extractTerms

public void extractTerms(Set<Term> terms)

Overrides:

extractTerms in class 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)

Overrides:

equals in class Query

hashCode

public int hashCode()

Overrides:

hashCode in class Query

clone

public ToChildBlockJoinQuery clone()

Overrides:

clone in class Query