public class ToChildBlockJoinQuery
extends org.apache.lucene.search.Query
ToParentBlockJoinQuery
, except this
query joins in reverse: you provide a Query matching
parent documents and it joins down to child
documents.
WARNING: to create the parents filter, always use
RawTermFilter
(so that the filter
includes deleted docs), wrapped with CachingWrapperFilter
(so that the returned bit set per
reader is a FixedBitSet
), specifying
DeletesMode.IGNORE (so that on reopen, the filter still
includes deleted docs). Failure to do this can result in
completely wrong documents being returned! For example:
Filter parents = new CachingWrapperFilter( new RawTermFilter(new Term("parent", "yes")), CachingWrapperFilter.DeletesMode.IGNORE);
Constructor and Description |
---|
ToChildBlockJoinQuery(org.apache.lucene.search.Query parentQuery,
org.apache.lucene.search.Filter parentsFilter,
boolean doScores) |
Modifier and Type | Method and Description |
---|---|
Object |
clone() |
org.apache.lucene.search.Weight |
createWeight(org.apache.lucene.search.Searcher searcher) |
boolean |
equals(Object _other) |
void |
extractTerms(Set<org.apache.lucene.index.Term> terms) |
int |
hashCode() |
org.apache.lucene.search.Query |
rewrite(org.apache.lucene.index.IndexReader reader) |
String |
toString(String field) |
public ToChildBlockJoinQuery(org.apache.lucene.search.Query parentQuery, org.apache.lucene.search.Filter parentsFilter, boolean doScores)
public org.apache.lucene.search.Weight createWeight(org.apache.lucene.search.Searcher searcher) throws IOException
createWeight
in class org.apache.lucene.search.Query
IOException
public void extractTerms(Set<org.apache.lucene.index.Term> terms)
extractTerms
in class org.apache.lucene.search.Query
public org.apache.lucene.search.Query rewrite(org.apache.lucene.index.IndexReader reader) throws IOException
rewrite
in class org.apache.lucene.search.Query
IOException
public String toString(String field)
toString
in class org.apache.lucene.search.Query
public boolean equals(Object _other)
equals
in class org.apache.lucene.search.Query
public int hashCode()
hashCode
in class org.apache.lucene.search.Query
public Object clone()
clone
in class org.apache.lucene.search.Query