org.apache.lucene.search.join

Class ToParentBlockJoinFieldComparator

java.lang.Object

org.apache.lucene.search.FieldComparator<Object>

org.apache.lucene.search.join.ToParentBlockJoinFieldComparator

Direct Known Subclasses:

ToParentBlockJoinFieldComparator.Highest, ToParentBlockJoinFieldComparator.Lowest

public abstract class ToParentBlockJoinFieldComparator
extends FieldComparator<Object>

A field comparator that allows parent documents to be sorted by fields from the nested / child documents.

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

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ToParentBlockJoinFieldComparator.Highest Concrete implementation of ToParentBlockJoinSortField to sorts the parent docs with the highest values in the child / nested docs first.
static class	ToParentBlockJoinFieldComparator.Lowest Concrete implementation of ToParentBlockJoinSortField to sorts the parent docs with the lowest values in the child / nested docs first.

Nested classes/interfaces inherited from class org.apache.lucene.search.FieldComparator

FieldComparator.ByteComparator, FieldComparator.DocComparator, FieldComparator.DoubleComparator, FieldComparator.FloatComparator, FieldComparator.IntComparator, FieldComparator.LongComparator, FieldComparator.NumericComparator<T extends Number>, FieldComparator.RelevanceComparator, FieldComparator.ShortComparator, FieldComparator.TermOrdValComparator, FieldComparator.TermValComparator

Method Summary

Methods

Modifier and Type	Method and Description
int	compare(int slot1, int slot2)
void	setBottom(int slot)
FieldComparator<Object>	setNextReader(AtomicReaderContext context)
void	setTopValue(Object value)
Object	value(int slot)

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

compareBottom, compareTop, compareValues, copy, setScorer

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

compare

public int compare(int slot1,
          int slot2)

Specified by:

compare in class FieldComparator<Object>

setBottom

public void setBottom(int slot)

Specified by:

setBottom in class FieldComparator<Object>

setTopValue

public void setTopValue(Object value)

Specified by:

setTopValue in class FieldComparator<Object>

setNextReader

public FieldComparator<Object> setNextReader(AtomicReaderContext context)
                                      throws IOException

Specified by:

setNextReader in class FieldComparator<Object>

Throws:

IOException

value

public Object value(int slot)

Specified by:

value in class FieldComparator<Object>