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

Class PreprocessorRKNNQuery<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.PreprocessorRKNNQuery<O,D>

All Implemented Interfaces:

DatabaseQuery, RKNNQuery<O,D>

public class PreprocessorRKNNQuery<O,D extends Distance<D>>
extends AbstractDataBasedQuery<O>
implements RKNNQuery<O,D>

Instance for a particular database, invoking the preprocessor.

Field Summary

Fields

Modifier and Type	Field and Description
private MaterializeKNNAndRKNNPreprocessor<O,D>	preprocessor The last preprocessor result
private boolean	warned Warn only once.

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
PreprocessorRKNNQuery(Relation<O> database, MaterializeKNNAndRKNNPreprocessor.Factory<O,D> preprocessor) Constructor.
PreprocessorRKNNQuery(Relation<O> database, MaterializeKNNAndRKNNPreprocessor<O,D> preprocessor) Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
List<? extends DistanceDBIDList<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

preprocessor

private final MaterializeKNNAndRKNNPreprocessor<O,D extends Distance<D>> preprocessor

The last preprocessor result

warned

private boolean warned

Warn only once.

Constructor Detail

PreprocessorRKNNQuery

public PreprocessorRKNNQuery(Relation<O> database,
                     MaterializeKNNAndRKNNPreprocessor<O,D> preprocessor)

Constructor.

Parameters:

database - Database to query

preprocessor - Preprocessor instance to use

PreprocessorRKNNQuery

public PreprocessorRKNNQuery(Relation<O> database,
                     MaterializeKNNAndRKNNPreprocessor.Factory<O,D> preprocessor)

Constructor.

Parameters:

database - Database to query

preprocessor - Preprocessor to use

Method Detail

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>>

Parameters:

id - query object ID

k - number of neighbors requested

Returns:

reverse k nearest neighbors

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

getRKNNForBulkDBIDs

public List<? extends DistanceDBIDList<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