Package elki.database.query.knn

Class PreprocessorKNNQuery

java.lang.Object

elki.database.query.knn.PreprocessorKNNQuery

All Implemented Interfaces:

elki.database.query.knn.KNNSearcher<elki.database.ids.DBIDRef>

Direct Known Subclasses:

PreprocessorSqrtKNNQuery, PreprocessorSquaredKNNQuery

public class PreprocessorKNNQuery
extends java.lang.Object
implements elki.database.query.knn.KNNSearcher<elki.database.ids.DBIDRef>

Use precomputed kNN.

Since:

0.4.0

Author:

Erich Schubert

Field Summary

Fields

Modifier and Type	Field	Description
private static elki.logging.Logging	LOG	Class logger
private AbstractMaterializeKNNPreprocessor<?>	preprocessor	The last preprocessor result
protected elki.database.relation.Relation<?>	relation	The data to use for this query
private boolean	warned	Warn only once.

Constructor Summary

Constructors

Constructor	Description
PreprocessorKNNQuery(elki.database.relation.Relation<?> relation, AbstractMaterializeKNNPreprocessor<?> preprocessor)	Constructor.

Method Summary

Modifier and Type	Method	Description
elki.database.ids.KNNList	getKNN(elki.database.ids.DBIDRef id, int k)
protected elki.logging.Logging	getLogger()	Get the class logger.
AbstractMaterializeKNNPreprocessor<?>	getPreprocessor()	Get the preprocessor instance.

Methods inherited from class java.lang.Object

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

Field Detail

LOG

private static final elki.logging.Logging LOG

Class logger

relation

protected final elki.database.relation.Relation<?> relation

The data to use for this query

preprocessor

private final AbstractMaterializeKNNPreprocessor<?> preprocessor

The last preprocessor result

warned

private boolean warned

Warn only once.

Constructor Detail

PreprocessorKNNQuery

public PreprocessorKNNQuery(elki.database.relation.Relation<?> relation,
                            AbstractMaterializeKNNPreprocessor<?> preprocessor)

Constructor.

Parameters:

relation - Relation to query

preprocessor - Preprocessor instance to use

Method Detail

getKNN

public elki.database.ids.KNNList getKNN(elki.database.ids.DBIDRef id,
                                        int k)

Specified by:

getKNN in interface elki.database.query.knn.KNNSearcher<elki.database.ids.DBIDRef>

getPreprocessor

public AbstractMaterializeKNNPreprocessor<?> getPreprocessor()

Get the preprocessor instance.

Returns:

preprocessor instance

getLogger

protected elki.logging.Logging getLogger()

Get the class logger. Override when subclassing!

Returns:

Class logger.