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 long 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(long 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(long target) { 058 if (target == lastTarget) { 059 correct = true; 060 } else { 061 correct = false; 062 lastTarget = target; 063 } 064 } 065 066 }