net.obsearch.pivots.random
Class RandomPivotSelector<O extends OB>

java.lang.Object
  net.obsearch.pivots.AbstractIncrementalPivotSelector<O>
      net.obsearch.pivots.random.RandomPivotSelector<O>

All Implemented Interfaces:

IncrementalPivotSelector<O>

public class RandomPivotSelector<O extends OB>
extends AbstractIncrementalPivotSelector<O>
implements IncrementalPivotSelector<O>

Field Summary

Fields inherited from class net.obsearch.pivots.AbstractIncrementalPivotSelector

pivotable, r

Constructor Summary

RandomPivotSelector(Pivotable<O> pivotable)

Method Summary

PivotResult

generatePivots(int pivotCount, cern.colt.list.LongArrayList elements, Index<O> index) Generates pivots from the elements (object ids) given in the array elements.

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

Methods inherited from interface net.obsearch.pivots.IncrementalPivotSelector

generatePivots

Constructor Detail

RandomPivotSelector

public RandomPivotSelector(Pivotable<O> pivotable)

Method Detail

generatePivots

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

Description copied from interface: IncrementalPivotSelector

Generates pivots from the elements (object ids) given in the array elements. Generates pivotsCount pivots.

Specified by:

generatePivots in interface IncrementalPivotSelector<O extends OB>

Specified by:

generatePivots in class AbstractIncrementalPivotSelector<O extends OB>

Returns:

A list of the ids of the pivots.

Throws:

OBException

IllegalAccessException

InstantiationException

OBStorageException

PivotsUnavailableException