AbstractGenomeComparator.java

/*
 * Encog(tm) Core v3.4 - Java Version
 * http://www.heatonresearch.com/encog/
 * https://github.com/encog/encog-java-core
 
 * Copyright 2008-2016 Heaton Research, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *   
 * For more information on Heaton Research copyrights, licenses 
 * and trademarks visit:
 * http://www.heatonresearch.com/copyright
 */
package org.encog.ml.ea.sort;

import java.io.Serializable;

/**
 * Provides base functionality for comparing genomes. Specifically the ability
 * to add bonuses and penalties.
 * 
 */
public abstract class AbstractGenomeComparator implements GenomeComparator,
		Serializable {

	/**
	 * The serial ID.
	 */
	private static final long serialVersionUID = 1L;

	/**
	 * {@inheritDoc}
	 */
	@Override
	public double applyBonus(final double value, final double bonus) {
		final double amount = value * bonus;
		if (shouldMinimize()) {
			return value - amount;
		} else {
			return value + amount;
		}
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	public double applyPenalty(final double value, final double bonus) {
		final double amount = value * bonus;
		if (!shouldMinimize()) {
			return value - amount;
		} else {
			return value + amount;
		}
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	public boolean isBetterThan(final double d1, final double d2) {
		if (shouldMinimize()) {
			return d1 < d2;
		} else {
			return d1 > d2;
		}
	}
}