org.apache.lucene.search.join
Class ToParentBlockJoinFieldComparator.Lowest

java.lang.Object
  org.apache.lucene.search.FieldComparator<Object>
      org.apache.lucene.search.join.ToParentBlockJoinFieldComparator
          org.apache.lucene.search.join.ToParentBlockJoinFieldComparator.Lowest

Enclosing class:

ToParentBlockJoinFieldComparator

public static final class ToParentBlockJoinFieldComparator.Lowest
extends ToParentBlockJoinFieldComparator

Concrete implementation of ToParentBlockJoinSortField to sorts the parent docs with the lowest values in the child / nested docs first.

Nested Class Summary

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

ToParentBlockJoinFieldComparator.Highest, ToParentBlockJoinFieldComparator.Lowest

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

Constructor Summary

ToParentBlockJoinFieldComparator.Lowest(FieldComparator<Object> wrappedComparator, Filter parentFilter, Filter childFilter, int spareSlot)
Create ToParentBlockJoinFieldComparator.Lowest

Method Summary

int	compareBottom(int parentDoc)
int	compareDocToValue(int parentDoc, Object value)
void	copy(int slot, int parentDoc)

Methods inherited from class org.apache.lucene.search.join.ToParentBlockJoinFieldComparator

compare, setBottom, setNextReader, value

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

compareValues, setScorer

Methods inherited from class java.lang.Object

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

Constructor Detail

ToParentBlockJoinFieldComparator.Lowest

public ToParentBlockJoinFieldComparator.Lowest(FieldComparator<Object> wrappedComparator,
                                               Filter parentFilter,
                                               Filter childFilter,
                                               int spareSlot)

Create ToParentBlockJoinFieldComparator.Lowest

Parameters:

wrappedComparator - The FieldComparator on the child / nested level.

parentFilter - Filter (must produce FixedBitSet per-segment) that identifies the parent documents.

childFilter - Filter that defines which child / nested documents participates in sorting.

spareSlot - The extra slot inside the wrapped comparator that is used to compare which nested document inside the parent document scope is most competitive.

Method Detail

compareBottom

public int compareBottom(int parentDoc)
                  throws IOException

Specified by:

compareBottom in class FieldComparator<Object>

Throws:

IOException

copy

public void copy(int slot,
                 int parentDoc)
          throws IOException

Specified by:

copy in class FieldComparator<Object>

Throws:

IOException

compareDocToValue

public int compareDocToValue(int parentDoc,
                             Object value)
                      throws IOException

Specified by:

compareDocToValue in class FieldComparator<Object>

Throws:

IOException