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.DoubleComparator, FieldComparator.FloatComparator, FieldComparator.IntComparator, FieldComparator.LongComparator

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

Field Summary

Fields

Modifier and Type	Field and Description
protected NumericDocValues	currentReaderValues
protected Bits	docsWithField
protected String	field
protected T	missingValue

Constructor Summary

Constructors

Constructor and Description
FieldComparator.NumericComparator(String field, T missingValue)

Method Summary

Methods

Modifier and Type	Method and Description
protected NumericDocValues	getNumericDocValues(AtomicReaderContext context, String field) Retrieves the NumericDocValues for the field in this segment
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

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

Field Detail

missingValue

protected final T extends Number missingValue

field

protected final String field

docsWithField

protected Bits docsWithField

currentReaderValues

protected NumericDocValues currentReaderValues

Constructor Detail

FieldComparator.NumericComparator

public FieldComparator.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

getNumericDocValues

protected NumericDocValues getNumericDocValues(AtomicReaderContext context,
                                   String field)
                                        throws IOException

Retrieves the NumericDocValues for the field in this segment

Throws:

IOException