Simplifier.java Source File

00001 package edu.ksu.cis.bandera.specification.ast;
00002 
00003 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
00004  * Bandera, a Java(TM) analysis and transformation toolkit           *
00005  * Copyright (C) 2000   Robby (robby@cis.ksu.edu)                    *
00006  * All rights reserved.                                              *
00007  *                                                                   *
00008  * This work was done as a project in the SAnToS Laboratory,         *
00009  * Department of Computing and Information Sciences, Kansas State    *
00010  * University, USA (http://www.cis.ksu.edu/santos).                  *
00011  * It is understood that any modification not identified as such is  *
00012  * not covered by the preceding statement.                           *
00013  *                                                                   *
00014  * This work is free software; you can redistribute it and/or        *
00015  * modify it under the terms of the GNU Library General Public       *
00016  * License as published by the Free Software Foundation; either      *
00017  * version 2 of the License, or (at your option) any later version.  *
00018  *                                                                   *
00019  * This work is distributed in the hope that it will be useful,      *
00020  * but WITHOUT ANY WARRANTY; without even the implied warranty of    *
00021  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU *
00022  * Library General Public License for more details.                  *
00023  *                                                                   *
00024  * You should have received a copy of the GNU Library General Public *
00025  * License along with this toolkit; if not, write to the             *
00026  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,      *
00027  * Boston, MA  02111-1307, USA.                                      *
00028  *                                                                   *
00029  * Java is a trademark of Sun Microsystems, Inc.                     *
00030  *                                                                   *
00031  * To submit a bug report, send a comment, or get the latest news on *
00032  * this project and other SAnToS projects, please visit the web-site *
00033  *                http://www.cis.ksu.edu/santos                      *
00034  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
00035 import edu.ksu.cis.bandera.specification.analysis.*;
00036 import edu.ksu.cis.bandera.specification.node.*;
00037 import java.util.*;
00038 public class Simplifier extends DepthFirstAdapter {
00039     PExp exp;
00040 /**
00041  * 
00042  * @param node edu.ksu.cis.bandera.specification.node.AAndAndExp
00043  */
00044 public void caseAAndAndExp(AAndAndExp node) {
00045     node.getAndExp().apply(this);
00046     PExp imp = exp;
00047     node.getUnaryExp().apply(this);
00048     exp = new ABinaryExp(imp, new AAndBinOp(new TAnd()), exp);
00049 }
00050 /**
00051  * 
00052  * @param node edu.ksu.cis.bandera.specification.node.AComplementUnaryExp
00053  */
00054 public void caseAComplementUnaryExp(AComplementUnaryExp node) {
00055     node.getPrimaryExp().apply(this);
00056     exp = new AComplementExp(node.getNot(), exp);
00057 }
00058 /**
00059  * 
00060  * @param node edu.ksu.cis.bandera.specification.node.AImplicationExp
00061  */
00062 public void caseAImplicationExp(AImplicationExp node) {
00063     node.getImplicationExp().apply(this);
00064     node.replaceBy(exp);
00065 }
00066 /**
00067  * 
00068  * @param node edu.ksu.cis.bandera.specification.node.AImplyImplicationExp
00069  */
00070 public void caseAImplyImplicationExp(AImplyImplicationExp node) {
00071     node.getImplicationExp().apply(this);
00072     PExp imp = exp;
00073     node.getOrExp().apply(this);
00074     exp = new ABinaryExp(imp, new AImplyBinOp(new TImply()), exp);
00075 }
00076 /**
00077  * 
00078  * @param node edu.ksu.cis.bandera.specification.node.AOrOrExp
00079  */
00080 public void caseAOrOrExp(AOrOrExp node) {
00081     node.getOrExp().apply(this);
00082     PExp imp = exp;
00083     node.getAndExp().apply(this);
00084     exp = new ABinaryExp(imp, new AOrBinOp(new TOr()), exp);
00085 }
00086 /**
00087  * 
00088  * @param node edu.ksu.cis.bandera.specification.node.AParenPrimaryExp
00089  */
00090 public void caseAParenPrimaryExp(AParenPrimaryExp node) {
00091     node.getExp().apply(this);
00092     exp = new AParenExp(node.getLParen(), exp, node.getRParen());
00093 }
00094 /**
00095  * 
00096  * @param node edu.ksu.cis.bandera.specification.node.APredicatePrimaryExp
00097  */
00098 public void caseAPredicatePrimaryExp(APredicatePrimaryExp node) {
00099     exp = new APredicateExp(node.getName(), node.getLParen(), node.getArgs(), node.getRParen());
00100 }
00101 }