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.incremental.dfa;
018
019/**
020 * Tri-state acceptance value.
021 * 
022 * @author Malte Isberner <malte.isberner@gmail.com>
023 *
024 */
025public enum Acceptance {
026        FALSE,
027        TRUE,
028        DONT_KNOW;
029        
030        /**
031         * Retrieves the corresponding acceptance value (either {@link #TRUE} or {@link #FALSE})
032         * for a given boolean value.
033         * @param val the boolean value
034         * @return the corresponding acceptance value
035         */
036        public static Acceptance fromBoolean(boolean val) {
037                return val ? TRUE : FALSE;
038        }
039        
040        
041        public boolean conflicts(boolean val) {
042                if(this == DONT_KNOW)
043                        return false;
044                return ((this == TRUE) != val);
045        }
046}