001    /* EVolve - an Extensible Software Visualization Framework
002     * Copyright (C) 2001-2002 Qin Wang
003     *
004     * This library is free software; you can redistribute it and/or
005     * modify it under the terms of the GNU Library General Public
006     * License as published by the Free Software Foundation; either
007     * version 2 of the License, or (at your option) any later version.
008     *
009     * This library is distributed in the hope that it will be useful,
010     * but WITHOUT ANY WARRANTY; without even the implied warranty of
011     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
012     * Library General Public License for more details.
013     *
014     * You should have received a copy of the GNU Library General Public
015     * License along with this library; if not, write to the
016     * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
017     * Boston, MA 02111-1307, USA.
018     */
019    
020    /*
021     * EVolve is distributed at http://www.sable.mcgill.ca/EVolve/
022     */
023    
024    package EVolve.visualization;
025    
026    /**
027     * Default predictor, predicts according to the last value.
028     */
029    public class DefaultPredictor extends Predictor {
030        private int lastTarget; // the last target
031        private boolean correct; // prediction value
032    
033        /**
034         * Creates a default predictor.
035         */
036        public DefaultPredictor() {
037            lastTarget = Integer.MIN_VALUE;
038            correct = true;
039        }
040    
041        public void newTarget(int target) {
042            if (target == lastTarget) {
043                correct = true;
044            } else {
045                if (lastTarget != Integer.MIN_VALUE) {
046                    correct = false;
047                }
048                lastTarget = target;
049            }
050        }
051    
052        public boolean isCorrect() {
053            return correct;
054    
055        }
056    
057        public void newTarget2(int target) {
058            if (target == lastTarget) {
059                correct = true;
060            } else {
061                correct = false;
062                lastTarget = target;
063            }
064        }
065    }