text: /* Copyright 2009-2020 David Hadka
   *
   * This file is part of the MOEA Framework.
   *
   * The MOEA Framework is free software: you can redistribute it and/or modify
   * it under the terms of the GNU Lesser General Public License as published by
   * the Free Software Foundation, either version 3 of the License, or (at your
   * option) any later version.
   *
   * The MOEA Framework is distributed in the hope that it will be useful, but
   * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
   * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
   * License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public License
   * along with the MOEA Framework.  If not, see <http://www.gnu.org/licenses/>.
   */
  package org.moeaframework.core.operator;
  
  import org.moeaframework.core.PRNG;
  import org.moeaframework.core.Population;
  import org.moeaframework.core.Selection;
  import org.moeaframework.core.Solution;
  
  /**
   * Uniform selection operator. Solutions are selected from the population with
   * equal probability.
   */
  public class UniformSelection implements Selection {
  
  	/**
  	 * Constructs a uniform selection operator.
  	 */
  	public UniformSelection() {
  		super();
  	}
  
  	@Override
  	public Solution[] select(int arity, Population population) {
  		Solution[] result = new Solution[arity];
  
  		for (int i = 0; i < arity; i++) {
  			result[i] = population.get(PRNG.nextInt(population.size()));
  		}
  
  		return result;
  	}
  
  }
  