net.obsearch.pivots.kmeans.impl
Class IncrementalKMeansPPPivotSelectorLong<O extends OBLong>

java.lang.Object
  net.obsearch.pivots.AbstractIncrementalPivotSelector<O>
      net.obsearch.pivots.kmeans.impl.IncrementalKMeansPPPivotSelectorLong<O>

Type Parameters:

O - Type of object of the index to be analyzed.

public class IncrementalKMeansPPPivotSelectorLong<O extends OBLong>
extends AbstractIncrementalPivotSelector<O>

This pivot selector uses k-means++ to select "good" centers.

Since:

0.8

Author:

Arnoldo Jose Muller Molina

Field Summary

Fields inherited from class net.obsearch.pivots.AbstractIncrementalPivotSelector

pivotable, r

Constructor Summary

IncrementalKMeansPPPivotSelectorLong(Pivotable<O> pivotable)
Creates a new IncrementalKMeansPPPivotSelectorLong that will accept pivots accepted by pivotable and will use index as the source of data.

Method Summary

PivotResult	generatePivots(int pivotsCount, cern.colt.list.LongArrayList elements, Index<O> index)
int	getRetries()
void	setRetries(int retries)

Methods inherited from class net.obsearch.pivots.AbstractIncrementalPivotSelector

enableAcceptRepeated, generatePivots, getObject, mapId, max, select, selectO, selectUnique

Methods inherited from class java.lang.Object

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

Constructor Detail

IncrementalKMeansPPPivotSelectorLong

public IncrementalKMeansPPPivotSelectorLong(Pivotable<O> pivotable)

Creates a new IncrementalKMeansPPPivotSelectorLong that will accept pivots accepted by pivotable and will use index as the source of data.

Parameters:

index - Index used to load and search objects

pivotable - Object used to determine which objects are suitable for being pivots.

Method Detail

generatePivots

public PivotResult generatePivots(int pivotsCount,
                                  cern.colt.list.LongArrayList elements,
                                  Index<O> index)
                           throws OBException,
                                  IllegalAccessException,
                                  InstantiationException,
                                  OBStorageException,
                                  PivotsUnavailableException

Specified by:

generatePivots in class AbstractIncrementalPivotSelector<O extends OBLong>

Throws:

OBException

IllegalAccessException

InstantiationException

OBStorageException

PivotsUnavailableException

getRetries

public int getRetries()

setRetries

public void setRetries(int retries)