001/* Copyright (C) 2013 TU Dortmund
002 * This file is part of AutomataLib, http://www.automatalib.net/.
003 * 
004 * AutomataLib is free software; you can redistribute it and/or
005 * modify it under the terms of the GNU Lesser General Public
006 * License version 3.0 as published by the Free Software Foundation.
007 * 
008 * AutomataLib is distributed in the hope that it will be useful,
009 * but WITHOUT ANY WARRANTY; without even the implied warranty of
010 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
011 * Lesser General Public License for more details.
012 * 
013 * You should have received a copy of the GNU Lesser General Public
014 * License along with AutomataLib; if not, see
015 * http://www.gnu.de/documents/lgpl.en.html.
016 */
017package net.automatalib.util.ts.acceptors;
018
019public interface AcceptanceCombiner {
020        public static AcceptanceCombiner AND = new AcceptanceCombiner() {
021                @Override
022                public boolean combine(boolean a1, boolean a2) {
023                        return a1 && a2;
024                }
025        };
026        
027        public static AcceptanceCombiner OR = new AcceptanceCombiner() {
028                @Override
029                public boolean combine(boolean a1, boolean a2) {
030                        return a1 || a2;
031                }
032        };
033        
034        public static AcceptanceCombiner XOR = new AcceptanceCombiner() {
035                @Override
036                public boolean combine(boolean a1, boolean a2) {
037                        return a1 ^ a2;
038                }
039        };
040        
041        public static AcceptanceCombiner EQUIV = new AcceptanceCombiner() {
042                @Override
043                public boolean combine(boolean a1, boolean a2) {
044                        return (a1 == a2);
045                }
046        };
047        
048        public static AcceptanceCombiner IMPL = new AcceptanceCombiner() {
049                @Override
050                public boolean combine(boolean a1, boolean a2) {
051                        return !a1 || a2;
052                }
053        };
054        
055        /**
056         * Combine two acceptance values.
057         * @param a1
058         * @param a2
059         * @return
060         */
061        public boolean combine(boolean a1, boolean a2);
062}