org.apache.lucene.search

Class FieldComparator.NumericComparator<T extends Number>

java.lang.Object

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

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

Direct Known Subclasses:

FieldComparator.ByteComparator, FieldComparator.DoubleComparator, FieldComparator.FloatComparator, FieldComparator.IntComparator, FieldComparator.LongComparator, FieldComparator.ShortComparator

Enclosing class:

FieldComparator<T>

public abstract static class FieldComparator.NumericComparator<T extends Number>
extends FieldComparator<T>

Base FieldComparator class for numeric types

Nested Class Summary

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

Constructors

Constructor and Description
NumericComparator(String field, T missingValue)

Method Summary

Modifier and Type	Method and Description
FieldComparator<T>	setNextReader(AtomicReaderContext context) Set a new AtomicReaderContext.

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

compare, compareBottom, compareTop, compareValues, copy, setBottom, setScorer, setTopValue, value

Methods inherited from class java.lang.Object

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

Constructor Detail

NumericComparator

public NumericComparator(String field,
                         T missingValue)

Method Detail

setNextReader

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

Description copied from class: FieldComparator

Set a new AtomicReaderContext. All subsequent docIDs are relative to the current reader (you must add docBase if you need to map it to a top-level docID).

Specified by:

setNextReader in class FieldComparator<T extends Number>

Parameters:

context - current reader context

Returns:

the comparator to use for this segment; most comparators can just return "this" to reuse the same comparator across segments

Throws:

IOException - if there is a low-level IO error