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

Class PreprocessorRKNNQuery<O>

java.lang.Object

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

All Implemented Interfaces:

DatabaseQuery, RKNNQuery<O>

public class PreprocessorRKNNQuery<O>
extends java.lang.Object
implements RKNNQuery<O>

Instance for a particular database, invoking the preprocessor.

Since:

0.4.0

Author:

Elke Achtert

Field Summary

Fields

Modifier and Type	Field and Description
private MaterializeKNNAndRKNNPreprocessor<O>	preprocessor The last preprocessor result
protected Relation<? extends O>	relation The data to use for this query
private boolean	warned Warn only once.

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> preprocessor) Constructor.
PreprocessorRKNNQuery(Relation<O> relation, MaterializeKNNAndRKNNPreprocessor<O> preprocessor) 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

relation

protected final Relation<? extends O> relation

The data to use for this query

preprocessor

private final MaterializeKNNAndRKNNPreprocessor<O> preprocessor

The last preprocessor result

warned

private boolean warned

Warn only once.

Constructor Detail

PreprocessorRKNNQuery

public PreprocessorRKNNQuery(Relation<O> relation,
                             MaterializeKNNAndRKNNPreprocessor<O> preprocessor)

Constructor.

Parameters:

relation - Relation to query

preprocessor - Preprocessor instance to use

PreprocessorRKNNQuery

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

Constructor.

Parameters:

database - Database to query

preprocessor - Preprocessor to use

Method Detail

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>

Parameters:

id - query object ID

k - number of neighbors requested

Returns:

reverse k nearest neighbors

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

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