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

Class LinearScanRKNNQuery<O,D extends Distance<D>>

java.lang.Object

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

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

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

Type Parameters:

O - Database object type

D - Distance type

All Implemented Interfaces:

DatabaseQuery, LinearScanQuery, RKNNQuery<O,D>

public class LinearScanRKNNQuery<O,D extends Distance<D>>
extends AbstractRKNNQuery<O,D>
implements LinearScanQuery

Default linear scan RKNN query class.

Field Summary

Fields

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

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

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

Method Summary

Methods

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

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

knnQuery

protected final KNNQuery<O,D extends Distance<D>> knnQuery

KNN query we use.

Constructor Detail

LinearScanRKNNQuery

public LinearScanRKNNQuery(DistanceQuery<O,D> distanceQuery,
                   KNNQuery<O,D> knnQuery,
                   Integer maxk)

Constructor.

Parameters:

distanceQuery - Distance function to use

knnQuery - kNN query to use.

maxk - k to use

Method Detail

getRKNNForObject

public DistanceDBIDList<D> 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,D extends Distance<D>>

Parameters:

obj - query object instance

k - number of neighbors requested

Returns:

reverse k nearest neighbors

getRKNNForDBID

public DistanceDBIDList<D> 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,D extends Distance<D>>

Specified by:

getRKNNForDBID in class AbstractRKNNQuery<O,D extends Distance<D>>

Parameters:

id - query object ID

k - number of neighbors requested

Returns:

reverse k nearest neighbors

getRKNNForBulkDBIDs

public List<GenericDistanceDBIDList<D>> 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,D extends Distance<D>>

Parameters:

ids - query object IDs

k - number of neighbors requested

Returns:

reverse k nearest neighbors