LeftAssignExprSwitch.java Source File

00001 package edu.ksu.cis.bandera.abstraction.typeinference;
00002 
00003 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
00004  * Bandera, a Java(TM) analysis and transformation toolkit           *
00005  * Copyright (C) 1998, 1999, 2000   Shawn Laubach (laubach@acm.org)  *
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.abstraction.util.*;
00036 import ca.mcgill.sable.soot.*;
00037 import ca.mcgill.sable.soot.jimple.*;
00038 import java.util.*;
00039 import edu.ksu.cis.bandera.jext.*;
00040 class LeftAssignExprSwitch extends IRNodes {
00041     private List constraints;
00042     private TypeInference ti;
00043     private UnionFindSet ufs;
00044     private Hashtable dependence;
00045 public LeftAssignExprSwitch(List c, TypeInference t, UnionFindSet ufs, Hashtable dependence) {
00046     constraints = c;
00047     ti = t;
00048     this.ufs = ufs;
00049     this.dependence = dependence;
00050 }
00051 /**
00052  * Insert the method's description here.
00053  * Creation date: (8/8/00 11:36:46 AM)
00054  * @return ca.mcgill.sable.soot.Type
00055  * @param t ca.mcgill.sable.soot.Type
00056  */
00057 public void addType(Type type) {
00058     if (ufs.find(type) == null) {
00059         ufs.add(type);
00060         ufs.setAttribute(type, type);
00061     }
00062 }
00063 public void caseArrayRef(ArrayRef v) {
00064     TypeStructure varnode = ti.getTypeStructure(v);
00065     ArrayTypeStructure var = (ArrayTypeStructure) ti.getTypeStructure(v.getBase());
00066     TypeStructure index = var.getIndex();
00067     v.getIndex().apply(ti);
00068     constraints.addAll(index.genEqualConstraints((TypeStructure) ti.getResult()));
00069     TypeStructure base = var.getElements();
00070     constraints.addAll(varnode.genEqualConstraints(base));
00071     setResult(varnode);
00072 }
00073 /**
00074    * This method was created in VisualAge.
00075    * @param v ca.mcgill.sable.soot.jimple.InstanceFieldRef
00076    */
00077 public void caseInstanceFieldRef(InstanceFieldRef v) {
00078     TypeStructure fs = ti.getTypeStructure(v.getField());
00079     TypeStructure ts = ti.getTypeStructure(v);
00080     constraints.addAll(ts.genEqualConstraints(fs));
00081     setResult(ts);
00082 }
00083 public void caseLocal(Local v) {
00084     TypeStructure node = ti.getTypeStructure(v);
00085     setResult(node);
00086 }
00087 public void caseStaticFieldRef(StaticFieldRef v) {
00088     TypeStructure fs = ti.getTypeStructure(v.getField());
00089     TypeStructure ts = ti.getTypeStructure(v);
00090     constraints.addAll(ts.genEqualConstraints(fs));
00091     setResult(ts);
00092 }
00093 public void defaultCase(Object o) {
00094     throw new RuntimeException("Unhandled left hand side" + o);
00095 }
00096 }