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/*******************************************************************************
* Copyright (c) 2010-2015, Andras Szabolcs Nagy, Abel Hegedus, Akos Horvath, Zoltan Ujhelyi and Daniel Varro
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0 which is available at
* http://www.eclipse.org/legal/epl-v20.html.
*
* SPDX-License-Identifier: EPL-2.0
*******************************************************************************/
package org.eclipse.viatra.dse.objectives;
import java.util.Comparator;
/**
* This helper class holds comparators for objective implementations.
*
* @author Andras Szabolcs Nagy
*
*/
public class Comparators {
private Comparators() { /*Utility class constructor*/ }
public static final Comparator<Double> HIGHER_IS_BETTER = (o1, o2) -> o1.compareTo(o2);
public static final Comparator<Double> LOWER_IS_BETTER = (o1, o2) -> o2.compareTo(o1);
private static final Double ZERO = Double.valueOf(0);
public static final Comparator<Double> DIFFERENCE_TO_ZERO_IS_BETTER = (o1, o2) -> ZERO.compareTo(Math.abs(o1)-Math.abs(o2));
}
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