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

Class LinearScanRKNNQuery<O>

java.lang.Object

de.lmu.ifi.dbs.elki.database.query.rknn.AbstractRKNNQuery<O>

de.lmu.ifi.dbs.elki.database.query.rknn.LinearScanRKNNQuery<O>

Type Parameters:

O - Database object type

All Implemented Interfaces:

DatabaseQuery, LinearScanQuery, RKNNQuery<O>

public class LinearScanRKNNQuery<O>
extends AbstractRKNNQuery<O>
implements LinearScanQuery

Default linear scan RKNN query class.

Since:

0.4.0

Author:

Erich Schubert

Field Summary

Fields

Modifier and Type	Field and Description
protected KNNQuery<O>	knnQuery KNN query we use.

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

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
LinearScanRKNNQuery(DistanceQuery<O> distanceQuery, KNNQuery<O> knnQuery, java.lang.Integer maxk) Constructor.

Method Summary

Modifier and Type	Method and Description
java.util.List<? extends DoubleDBIDList>	getRKNNForBulkDBIDs(ArrayDBIDs ids, int k) Bulk query method for reverse k nearest neighbors for ids.
DoubleDBIDList	getRKNNForDBID(DBIDRef id, int k) Get the reverse k nearest neighbors for a particular id.
DoubleDBIDList	getRKNNForObject(O obj, int k) Get the reverse k nearest neighbors for a particular object.

Methods inherited from class java.lang.Object

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

Field Detail

knnQuery

protected final KNNQuery<O> knnQuery

KNN query we use.

Constructor Detail

LinearScanRKNNQuery

public LinearScanRKNNQuery(DistanceQuery<O> distanceQuery,
                           KNNQuery<O> knnQuery,
                           java.lang.Integer maxk)

Constructor.

Parameters:

distanceQuery - Distance function to use

knnQuery - kNN query to use.

maxk - k to use

Method Detail

getRKNNForObject

public DoubleDBIDList getRKNNForObject(O obj,
                                       int k)

Description copied from interface: RKNNQuery

Get the reverse k nearest neighbors for a particular object.

Specified by:

getRKNNForObject in interface RKNNQuery<O>

Parameters:

obj - query object instance

k - number of neighbors requested

Returns:

reverse k nearest neighbors

getRKNNForDBID

public DoubleDBIDList getRKNNForDBID(DBIDRef id,
                                     int k)

Description copied from interface: RKNNQuery

Get the reverse k nearest neighbors for a particular id.

Specified by:

getRKNNForDBID in interface RKNNQuery<O>

Specified by:

getRKNNForDBID in class AbstractRKNNQuery<O>

Parameters:

id - query object ID

k - number of neighbors requested

Returns:

reverse k nearest neighbors

getRKNNForBulkDBIDs

public java.util.List<? extends DoubleDBIDList> getRKNNForBulkDBIDs(ArrayDBIDs ids,
                                                                    int k)

Description copied from interface: RKNNQuery

Bulk query method for reverse k nearest neighbors for ids.

Specified by:

getRKNNForBulkDBIDs in interface RKNNQuery<O>

Parameters:

ids - query object IDs

k - number of neighbors requested

Returns:

reverse k nearest neighbors