RandomSelect.java

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package hh.heuristicselectors;

import hh.nextheuristic.AbstractOperatorSelector;
import hh.creditassigment.Credit;
import java.util.Collection;
import org.moeaframework.core.Variation;

/**
 * RandomSelect randomly selects a heuristic with uniform probability from the 
 * given set of heuristics
 * @author nozomihitomi
 */
public class RandomSelect extends AbstractOperatorSelector{
    
    /**
     * RandomSelect does not really utilize the credit repository so any 
     * repository will do
     * @param heuristics from which to select from 
     */
    public RandomSelect(Collection<Variation> heuristics) {
        super(heuristics);
    }

    /**
     * Randomly selects the next heuristic from the set of heuristics with 
     * uniform probability
     * @return 
     */
    @Override
    public Variation nextHeuristic() {
        incrementIterations();
        return super.getRandomOperator(operators);
    }

    @Override
    public String toString() {
        return "RandomSelect";
    }

    @Override
    public void update(Credit reward, Variation heuristic) {
        //no need to do any updates
    }
    
}