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

Class MetricalIndexRangeQuery<O>

java.lang.Object

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

de.lmu.ifi.dbs.elki.index.tree.metrical.mtreevariants.query.MetricalIndexRangeQuery<O>

Type Parameters:

O - Object type

All Implemented Interfaces:

DatabaseQuery, RangeQuery<O>

public class MetricalIndexRangeQuery<O>
extends AbstractDistanceRangeQuery<O>

Instance of a range query for a particular spatial index.

Author:

Erich Schubert

Field Summary

Fields

Modifier and Type	Field and Description
protected AbstractMTree<O,?,?,?>	index The index to use

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

distanceQuery, 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
MetricalIndexRangeQuery(AbstractMTree<O,?,?,?> index, DistanceQuery<O> distanceQuery) Constructor.

Method Summary

Modifier and Type	Method and Description
private void	doRangeQuery(DBID o_p, AbstractMTreeNode<O,?,?> node, O q, double r_q, ModifiableDoubleDBIDList result) Performs a range query on the specified subtree.
DoubleDBIDList	getRangeForObject(O obj, double 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

getRangeForDBID

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,?,?,?> index

The index to use

Constructor Detail

MetricalIndexRangeQuery

public MetricalIndexRangeQuery(AbstractMTree<O,?,?,?> index,
                               DistanceQuery<O> distanceQuery)

Constructor.

Parameters:

index - Index to use

distanceQuery - Distance query used

Method Detail

doRangeQuery

private void doRangeQuery(DBID o_p,
                          AbstractMTreeNode<O,?,?> node,
                          O q,
                          double r_q,
                          ModifiableDoubleDBIDList 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:

o_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 DoubleDBIDList getRangeForObject(O obj,
                                        double 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>

Specified by:

getRangeForObject in class AbstractDistanceRangeQuery<O>

Parameters:

obj - Query object

range - Query range

Returns:

neighbors