de.lmu.ifi.dbs.elki.database.query.range

Class DoubleOptimizedDistanceRangeQuery<O>

java.lang.Object

de.lmu.ifi.dbs.elki.database.query.AbstractDataBasedQuery<O>

de.lmu.ifi.dbs.elki.database.query.range.AbstractDistanceRangeQuery<O,DoubleDistance>

de.lmu.ifi.dbs.elki.database.query.range.DoubleOptimizedDistanceRangeQuery<O>

Type Parameters:

O - Database object type

All Implemented Interfaces:

DatabaseQuery, LinearScanQuery, RangeQuery<O,DoubleDistance>

public class DoubleOptimizedDistanceRangeQuery<O>
extends AbstractDistanceRangeQuery<O,DoubleDistance>
implements LinearScanQuery

Default linear scan range query class.

Field Summary

Fields

Modifier and Type	Field and Description
(package private) PrimitiveDoubleDistanceFunction<? super O>	rawdist Raw distance function.

Fields inherited from class de.lmu.ifi.dbs.elki.database.query.range.AbstractDistanceRangeQuery

distanceQuery

Fields inherited from class de.lmu.ifi.dbs.elki.database.query.AbstractDataBasedQuery

relation

Fields inherited from interface de.lmu.ifi.dbs.elki.database.query.DatabaseQuery

HINT_BULK, HINT_EXACT, HINT_HEAVY_USE, HINT_NO_CACHE, HINT_OPTIMIZED_ONLY, HINT_SINGLE

Constructor Summary

Constructors

Constructor and Description
DoubleOptimizedDistanceRangeQuery(DistanceQuery<O,DoubleDistance> distanceQuery) Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
DistanceDBIDList<DoubleDistance>	getRangeForDBID(DBIDRef id, DoubleDistance range) Get the nearest neighbors for a particular id in a given query range
DistanceDBIDList<DoubleDistance>	getRangeForObject(O obj, DoubleDistance range) Get the nearest neighbors for a particular object in a given query range
private static <O> void	linearScan(Relation<? extends O> relation, DBIDIter iter, PrimitiveDoubleDistanceFunction<? super O> rawdist, O obj, double range, ModifiableDoubleDistanceDBIDList result)

Methods inherited from class de.lmu.ifi.dbs.elki.database.query.range.AbstractDistanceRangeQuery

getDistanceFactory

Methods inherited from class de.lmu.ifi.dbs.elki.database.query.AbstractDataBasedQuery

getRelation

Methods inherited from class java.lang.Object

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

Field Detail

rawdist

PrimitiveDoubleDistanceFunction<? super O> rawdist

Raw distance function.

Constructor Detail

DoubleOptimizedDistanceRangeQuery

public DoubleOptimizedDistanceRangeQuery(DistanceQuery<O,DoubleDistance> distanceQuery)

Constructor.

Parameters:

distanceQuery - Distance function to use

Method Detail

getRangeForDBID

public DistanceDBIDList<DoubleDistance> getRangeForDBID(DBIDRef id,
                                               DoubleDistance range)

Description copied from interface: RangeQuery

Get the nearest neighbors for a particular id in a given query range

Specified by:

getRangeForDBID in interface RangeQuery<O,DoubleDistance>

Overrides:

getRangeForDBID in class AbstractDistanceRangeQuery<O,DoubleDistance>

Parameters:

id - query object ID

range - Query range

Returns:

neighbors

getRangeForObject

public DistanceDBIDList<DoubleDistance> getRangeForObject(O obj,
                                                 DoubleDistance range)

Description copied from interface: RangeQuery

Get the nearest neighbors for a particular object in a given query range

Specified by:

getRangeForObject in interface RangeQuery<O,DoubleDistance>

Specified by:

getRangeForObject in class AbstractDistanceRangeQuery<O,DoubleDistance>

Parameters:

obj - Query object

range - Query range

Returns:

neighbors

linearScan

private static <O> void linearScan(Relation<? extends O> relation,
                  DBIDIter iter,
                  PrimitiveDoubleDistanceFunction<? super O> rawdist,
                  O obj,
                  double range,
                  ModifiableDoubleDistanceDBIDList result)