org.apache.lucene.search.comparators

Class IntComparator

java.lang.Object

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

org.apache.lucene.search.comparators.NumericComparator<Integer>

org.apache.lucene.search.comparators.IntComparator

public class IntComparator
extends NumericComparator<Integer>

Comparator based on Integer.compare(int, int) for numHits. This comparator provides a skipping functionality – an iterator that can skip over non-competitive documents.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
class	IntComparator.IntLeafComparator Leaf comparator for IntComparator that provides skipping functionality

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

NumericComparator.NumericLeafComparator

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

FieldComparator.RelevanceComparator, FieldComparator.TermOrdValComparator, FieldComparator.TermValComparator

Field Summary

Fields

Modifier and Type	Field and Description
protected int	bottom
protected int	topValue

Fields inherited from class org.apache.lucene.search.comparators.NumericComparator

field, hitsThresholdReached, missingValue, primarySort, queueFull, reverse, singleSort, topValueSet

Constructor Summary

Constructors

Constructor and Description
IntComparator(int numHits, String field, Integer missingValue, boolean reverse, int sortPos)

Method Summary

Modifier and Type	Method and Description
int	compare(int slot1, int slot2) Compare hit at slot1 with hit at slot2.
LeafFieldComparator	getLeafComparator(LeafReaderContext context) Get a per-segment LeafFieldComparator to collect the given LeafReaderContext.
void	setTopValue(Integer value) Record the top value, for future calls to LeafFieldComparator.compareTop(int).
Integer	value(int slot) Return the actual value in the slot.

Methods inherited from class org.apache.lucene.search.comparators.NumericComparator

setCanUsePoints, setSingleSort

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

compareValues

Methods inherited from class java.lang.Object

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

Field Detail

topValue

protected int topValue

bottom

protected int bottom

Constructor Detail

IntComparator

public IntComparator(int numHits,
                     String field,
                     Integer missingValue,
                     boolean reverse,
                     int sortPos)

Method Detail

compare

public int compare(int slot1,
                   int slot2)

Description copied from class: FieldComparator

Compare hit at slot1 with hit at slot2.

Specified by:

compare in class FieldComparator<Integer>

Parameters:

slot1 - first slot to compare

slot2 - second slot to compare

Returns:

any N < 0 if slot2's value is sorted after slot1, any N > 0 if the slot2's value is sorted before slot1 and 0 if they are equal

setTopValue

public void setTopValue(Integer value)

Description copied from class: FieldComparator

Record the top value, for future calls to LeafFieldComparator.compareTop(int). This is only called for searches that use searchAfter (deep paging), and is called before any calls to FieldComparator.getLeafComparator(LeafReaderContext).

Overrides:

setTopValue in class NumericComparator<Integer>

value

public Integer value(int slot)

Description copied from class: FieldComparator

Return the actual value in the slot.

Specified by:

value in class FieldComparator<Integer>

Parameters:

slot - the value

Returns:

value in this slot

getLeafComparator

public LeafFieldComparator getLeafComparator(LeafReaderContext context)
                                      throws IOException

Description copied from class: FieldComparator

Get a per-segment LeafFieldComparator to collect the given LeafReaderContext. All docIDs supplied to this LeafFieldComparator are relative to the current reader (you must add docBase if you need to map it to a top-level docID).

Specified by:

getLeafComparator in class FieldComparator<Integer>

Parameters:

context - current reader context

Returns:

the comparator to use for this segment

Throws:

IOException - if there is a low-level IO error