RandomPivotSelector.java :  » Search » obsearch » net » obsearch » pivots » random » Java Open Source

package net.obsearch.pivots.random;

import java.util.Random;

import cern.colt.list.LongArrayList;
import net.obsearch.Index;
import net.obsearch.OB;
import net.obsearch.exception.OBException;
import net.obsearch.exception.OBStorageException;
import net.obsearch.exception.PivotsUnavailableException;
import net.obsearch.pivots.AbstractIncrementalPivotSelector;
import net.obsearch.pivots.IncrementalPivotSelector;
import net.obsearch.pivots.PivotResult;
import net.obsearch.pivots.Pivotable;

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

  public RandomPivotSelector(Pivotable<O> pivotable) {
    super(pivotable);
  }

  @Override
  public PivotResult generatePivots(int pivotCount, LongArrayList elements,
      Index<O> index) throws OBException, IllegalAccessException,
      InstantiationException, OBStorageException,
      PivotsUnavailableException {
    Random r = new Random();
    long [] ids = super.select(pivotCount, r, elements, index, null);
    return new PivotResult(ids);
  }
  
  
}