/*

     dsh-evolve  Framework for evolutionary algorithms.

     Copyright (c) 2005-2013 held jointly by the individual authors.

     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; with out 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, write to the Free Software Foundation,

     Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA.

     > http://www.fsf.org/licensing/licenses/lgpl.html

     > http://www.opensource.org/licenses/lgpl-license.php

 */

 package org.dishevelled.evolve.fitness;

 import org.dishevelled.evolve.Fitness;

 import org.dishevelled.functor.UnaryFunction;

 //import cern.colt...functions.DoubleFunction;

 /**

  * Fitness transform.

  *

  * @param <I> individual type

  * @author  Michael Heuer

  * @version $Revision$ $Date$

  */

 public final class FitnessTransform<I>

     implements Fitness<I>

 {

     /** Fitness delegate. */

     private final Fitness<I> fitness;

     /** Tranform function. */

     private final UnaryFunction<Double, Double> transform;

     //private final DoubleFunction transform;

     /**

      * Create a new fitness transform with the specified

      * fitness function and transform function.

      *

      * @param fitness fitness function to transform, must not be null

      * @param transform transform function, must not be null

      */

     public FitnessTransform(final Fitness<I> fitness,

                                final UnaryFunction<Double, Double> transform)

     {

         if (fitness == null)

         {

             throw new IllegalArgumentException("fitness must not be null");

         }

         if (transform == null)

         {

             throw new IllegalArgumentException("transform must not be null");

         }

         this.fitness = fitness;

         this.transform = transform;

     }

     /** {@inheritDoc} */

     public Double score(final I individual)

     {

         return transform.evaluate(fitness.score(individual));

     }

 }