Module org.elasticsearch.server

Package org.elasticsearch.lucene.comparators

Class XNumericComparator.NumericLeafComparator

java.lang.Object

org.elasticsearch.lucene.comparators.XNumericComparator.NumericLeafComparator

All Implemented Interfaces:

org.apache.lucene.search.LeafFieldComparator

Direct Known Subclasses:

XLongComparator.LongLeafComparator

Enclosing class:

XNumericComparator<T extends Number>

public abstract class XNumericComparator.NumericLeafComparator
extends Object
implements org.apache.lucene.search.LeafFieldComparator

Leaf comparator for NumericComparator that provides skipping functionality

Field Summary

Fields

Modifier and Type	Field	Description
protected final org.apache.lucene.index.NumericDocValues	docValues

Constructor Summary

Constructors

Constructor	Description
NumericLeafComparator(org.apache.lucene.index.LeafReaderContext context)

Method Summary

Modifier and Type	Method	Description
protected abstract long	bottomAsComparableLong()
protected XNumericComparator<T>.CompetitiveDISIBuilder	buildCompetitiveDISIBuilder(org.apache.lucene.index.LeafReaderContext context)
org.apache.lucene.search.DocIdSetIterator	competitiveIterator()
void	copy(int slot, int doc)
protected org.apache.lucene.index.NumericDocValues	getNumericDocValues(org.apache.lucene.index.LeafReaderContext context, String field)	Retrieves the NumericDocValues for the field in this segment
void	setBottom(int slot)
void	setHitsThresholdReached()
void	setScorer(org.apache.lucene.search.Scorable scorer)
protected abstract long	topAsComparableLong()

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.lucene.search.LeafFieldComparator

compareBottom, compareTop

Field Details

docValues

protected final org.apache.lucene.index.NumericDocValues docValues

Constructor Details

NumericLeafComparator

public NumericLeafComparator(org.apache.lucene.index.LeafReaderContext context)
                      throws IOException

Throws:

IOException

Method Details

buildCompetitiveDISIBuilder

protected XNumericComparator<T>.CompetitiveDISIBuilder buildCompetitiveDISIBuilder(org.apache.lucene.index.LeafReaderContext context)
                                                                            throws IOException

Throws:

IOException

getNumericDocValues

protected org.apache.lucene.index.NumericDocValues getNumericDocValues(org.apache.lucene.index.LeafReaderContext context,
 String field)
                                                                throws IOException

Retrieves the NumericDocValues for the field in this segment

If you override this method, you should probably always disable skipping as the comparator uses values from the points index to build its competitive iterators, and assumes that the values in doc values and points are the same.

Parameters:

context - – reader context

field - - field name

Returns:

numeric doc values for the field in this segment.

Throws:

IOException - If there is a low-level I/O error

setBottom

public void setBottom(int slot)
               throws IOException

Specified by:

setBottom in interface org.apache.lucene.search.LeafFieldComparator

Throws:

IOException

copy

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

Specified by:

copy in interface org.apache.lucene.search.LeafFieldComparator

Throws:

IOException

setScorer

public void setScorer(org.apache.lucene.search.Scorable scorer)
               throws IOException

Specified by:

setScorer in interface org.apache.lucene.search.LeafFieldComparator

Throws:

IOException

setHitsThresholdReached

public void setHitsThresholdReached()
                             throws IOException

Specified by:

setHitsThresholdReached in interface org.apache.lucene.search.LeafFieldComparator

Throws:

IOException

competitiveIterator

public org.apache.lucene.search.DocIdSetIterator competitiveIterator()

Specified by:

competitiveIterator in interface org.apache.lucene.search.LeafFieldComparator

bottomAsComparableLong

protected abstract long bottomAsComparableLong()

topAsComparableLong

protected abstract long topAsComparableLong()