1 //****************************************************************************** 2 // 3 // File: BooleanOp.java 4 // Package: edu.rit.pj.reduction 5 // Unit: Class edu.rit.pj.reduction.BooleanOp 6 // 7 // This Java source file is copyright (C) 2007 by Alan Kaminsky. All rights 8 // reserved. For further information, contact the author, Alan Kaminsky, at 9 // ark@cs.rit.edu. 10 // 11 // This Java source file is part of the Parallel Java Library ("PJ"). PJ is free 12 // software; you can redistribute it and/or modify it under the terms of the GNU 13 // General Public License as published by the Free Software Foundation; either 14 // version 3 of the License, or (at your option) any later version. 15 // 16 // PJ is distributed in the hope that it will be useful, but WITHOUT ANY 17 // WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR 18 // A PARTICULAR PURPOSE. See the GNU General Public License for more details. 19 // 20 // Linking this library statically or dynamically with other modules is making a 21 // combined work based on this library. Thus, the terms and conditions of the GNU 22 // General Public License cover the whole combination. 23 // 24 // As a special exception, the copyright holders of this library give you 25 // permission to link this library with independent modules to produce an 26 // executable, regardless of the license terms of these independent modules, and 27 // to copy and distribute the resulting executable under terms of your choice, 28 // provided that you also meet, for each linked independent module, the terms 29 // and conditions of the license of that module. An independent module is a module 30 // which is not derived from or based on this library. If you modify this library, 31 // you may extend this exception to your version of the library, but you are not 32 // obligated to do so. If you do not wish to do so, delete this exception 33 // statement from your version. 34 // 35 // A copy of the GNU General Public License is provided in the file gpl.txt. You 36 // may also obtain a copy of the GNU General Public License on the World Wide 37 // Web at http://www.gnu.org/licenses/gpl.html. 38 // 39 //****************************************************************************** 40 package edu.rit.pj.reduction; 41 42 /** 43 * Class BooleanOp is the abstract base class for a binary operation on Boolean 44 * values, used to do reduction in a parallel program. 45 * 46 * @author Alan Kaminsky 47 * @version 05-Jun-2007 48 */ 49 public abstract class BooleanOp 50 extends Op { 51 52 // Hidden constructors. 53 /** 54 * Construct a new Boolean binary operation. 55 */ 56 protected BooleanOp() { 57 super(); 58 } 59 60 // Exported operations. 61 /** 62 * Perform this binary operation. 63 * 64 * @param x First argument. 65 * @param y Second argument. 66 * @return (<code>x</code> <I>op</I> <code>y</code>), where <I>op</I> stands for 67 * this binary operation. 68 */ 69 public abstract boolean op(boolean x, 70 boolean y); 71 72 // Exported constants. 73 /** 74 * The Boolean logical "and" binary operation. 75 */ 76 public static final BooleanOp AND 77 = new BooleanOp() { 78 public boolean op(boolean x, 79 boolean y) { 80 return x & y; 81 } 82 }; 83 84 /** 85 * The Boolean logical "or" binary operation. 86 */ 87 public static final BooleanOp OR 88 = new BooleanOp() { 89 public boolean op(boolean x, 90 boolean y) { 91 return x | y; 92 } 93 }; 94 95 /** 96 * The Boolean logical "exclusive or" binary operation. 97 */ 98 public static final BooleanOp XOR 99 = new BooleanOp() { 100 public boolean op(boolean x, 101 boolean y) { 102 return x ^ y; 103 } 104 }; 105 106 }