Java tutorial
/** * Computational Intelligence Library (CIlib) * Copyright (C) 2003 - 2010 * Computational Intelligence Research Group (CIRG@UP) * Department of Computer Science * University of Pretoria * South Africa * * This library 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. * * This library 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 this library; if not, see <http://www.gnu.org/licenses/>. */ package net.sourceforge.cilib.pso.crossover.velocityprovider; import com.google.common.base.Function; import com.google.common.collect.Lists; import java.util.List; import net.sourceforge.cilib.entity.Particle; import net.sourceforge.cilib.type.types.container.StructuredType; import net.sourceforge.cilib.type.types.container.Vector; import net.sourceforge.cilib.util.Vectors; /** * This OffspringVelocityProvider sets an offspring's velocity to the average * velocity of its parents. */ public class AverageParentsOffspringVelocityProvider extends OffspringVelocityProvider { @Override public StructuredType f(List<Particle> parent, Particle offspring) { return Vectors.mean(Lists.transform(parent, new Function<Particle, Vector>() { @Override public Vector apply(Particle f) { return (Vector) f.getVelocity(); } })); } }