package jcgp.population;

import java.util.Iterator;

import jcgp.Parameters;

public class Population implements Iterable<Chromosome> {
	
	private Chromosome[] population;
	
	public Population(Chromosome chromosome) {
		population = new Chromosome[Parameters.getPopulationSize()];
		for (int c = 0; c < population.length; c++) {
			population[c] = new Chromosome(chromosome);
		}
	}
	
	public Population() {
		population = new Chromosome[Parameters.getPopulationSize()];
		for (int c = 0; c < population.length; c++) {
			population[c] = new Chromosome();
		}
	}

	@Override
	public Iterator<Chromosome> iterator() {
		return new Iterator<Chromosome>() {
			
			private int index = 0;

			@Override
			public boolean hasNext() {
				if (index < population.length) {
					return true;
				} else {
					return false;
				}
			}

			@Override
			public Chromosome next() {
				Chromosome next = population[index];
				index++;
				return next;
			}

			@Override
			public void remove() {
				// not allowed
				throw new UnsupportedOperationException("Removing chromosomes from the population is not allowed. Instead, re-instantiate the chromosome.");
			}
		};
	}
}