toxgene.core.random.ToxUserDefined Maven / Gradle / Ivy

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Modified ToXGene for the iBench project.

The newest version!

/**
 * Implements a Gene for enumeration simpletypes.
 *
 * @version 0.1
 * @author Denilson Barbosa
 */

package toxgene.core.random;


import java.util.Vector;
import java.util.Random;

import toxgene.core.ToXgeneErrorException;
import toxgene.core.genes.CreateGeneException;
import toxgene.util.FloatObjectPair;

public class ToxUserDefined implements ToxRandom{
  private Vector options;
  private float min, max, sum;
  private Random rand;
  
  public ToxUserDefined(float min, float max, long seed){
		this.min = min;
		this.max = max;
		
		if (max < min){
			throw new CreateGeneException("invalid min and max values for "+
																		"ToxGaussian random generator!");
		}
		
		options = new Vector();
		sum = 0;
		rand = new Random(seed);
  }
	
  public long nextInt(){
		return (Math.round((double)nextFloat()));
  }
	
  public float nextFloat(){
		float pick = 100*rand.nextFloat();
		int size = options.size();
		
		if (size ==0)
			return ((Float)((FloatObjectPair)options.elementAt(0)).value()).floatValue();

		for (int i=0;i max){
			throw new CreateGeneException("invalid distribution value");
		}
		sum += percent;
		options.add(new FloatObjectPair(sum, new Float(value)));
  }
	
  public float minValue(){
		return min;
  }
	
  public float maxValue(){
		return max;
  }
	
  public long nextInt(float value){
		if (value < min){
			throw new ToXgeneErrorException("cannot update distribution max value: "+
																			value+" is smaller than minimum value: "+
																			min);
		}
		if (value == max)
			return (Math.round(nextFloat()));
		
		return (Math.round((double)min + ((value-min) * rand.nextFloat())));
  }
}