From e11bce7ad3e803e80883499fec0ad6e4540ffe43 Mon Sep 17 00:00:00 2001 From: Kristóf Marussy Date: Tue, 30 Jun 2020 18:03:48 +0200 Subject: Add modified VIATRA-DSE version --- .../eclipse/viatra/dse/objectives/Comparators.java | 31 ++++++++++++++++++++++ 1 file changed, 31 insertions(+) create mode 100644 Solvers/VIATRA-Solver/org.eclipse.viatra.dse/src/org/eclipse/viatra/dse/objectives/Comparators.java (limited to 'Solvers/VIATRA-Solver/org.eclipse.viatra.dse/src/org/eclipse/viatra/dse/objectives/Comparators.java') diff --git a/Solvers/VIATRA-Solver/org.eclipse.viatra.dse/src/org/eclipse/viatra/dse/objectives/Comparators.java b/Solvers/VIATRA-Solver/org.eclipse.viatra.dse/src/org/eclipse/viatra/dse/objectives/Comparators.java new file mode 100644 index 00000000..b1bd9349 --- /dev/null +++ b/Solvers/VIATRA-Solver/org.eclipse.viatra.dse/src/org/eclipse/viatra/dse/objectives/Comparators.java @@ -0,0 +1,31 @@ +/******************************************************************************* + * 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 HIGHER_IS_BETTER = (o1, o2) -> o1.compareTo(o2); + + public static final Comparator LOWER_IS_BETTER = (o1, o2) -> o2.compareTo(o1); + + private static final Double ZERO = Double.valueOf(0); + + public static final Comparator DIFFERENCE_TO_ZERO_IS_BETTER = (o1, o2) -> ZERO.compareTo(Math.abs(o1)-Math.abs(o2)); + +} -- cgit v1.2.3-54-g00ecf