de.lmu.ifi.dbs.elki.index.tree.metrical.mtreevariants.query

Class DoubleDistanceMetricalIndexRangeQuery<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.index.tree.metrical.mtreevariants.query.DoubleDistanceMetricalIndexRangeQuery<O>

All Implemented Interfaces:

DatabaseQuery, RangeQuery<O,DoubleDistance>

public class DoubleDistanceMetricalIndexRangeQuery<O>
extends AbstractDistanceRangeQuery<O,DoubleDistance>

Instance of a range query for a particular spatial index.

Field Summary

Fields

Modifier and Type	Field and Description
protected PrimitiveDoubleDistanceFunction<? super O>	distf Distance function
protected AbstractMTree<O,DoubleDistance,?,?,?>	index The index to use

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
DoubleDistanceMetricalIndexRangeQuery(AbstractMTree<O,DoubleDistance,?,?,?> index, DistanceQuery<O,DoubleDistance> distanceQuery, PrimitiveDoubleDistanceFunction<? super O> distf) Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
private void	doRangeQuery(DBID id_p, AbstractMTreeNode<O,DoubleDistance,?,?> node, O q, double r_q, ModifiableDoubleDistanceDBIDList result) Performs a range query on the specified subtree.
DistanceDBIDList<DoubleDistance>	getRangeForObject(O obj, DoubleDistance range) Get the nearest neighbors for a particular object in a given query range

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

getDistanceFactory, getRangeForDBID

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

index

protected final AbstractMTree<O,DoubleDistance,?,?,?> index

The index to use

distf

protected PrimitiveDoubleDistanceFunction<? super O> distf

Distance function

Constructor Detail

DoubleDistanceMetricalIndexRangeQuery

public DoubleDistanceMetricalIndexRangeQuery(AbstractMTree<O,DoubleDistance,?,?,?> index,
                                     DistanceQuery<O,DoubleDistance> distanceQuery,
                                     PrimitiveDoubleDistanceFunction<? super O> distf)

Constructor.

Parameters:

index - Index to use

distanceQuery - Distance query used

distf - Distance function

Method Detail

doRangeQuery

private void doRangeQuery(DBID id_p,
                AbstractMTreeNode<O,DoubleDistance,?,?> node,
                O q,
                double r_q,
                ModifiableDoubleDistanceDBIDList result)

Performs a range query on the specified subtree. It recursively traverses all paths from the specified node, which cannot be excluded from leading to qualifying objects.

Parameters:

id_p - the routing object of the specified node

node - the root of the subtree to be traversed

q - the query object

r_q - the query range

result - the list holding the query results

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