BaseTypeStructure.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 java.util.*;
00036 public class BaseTypeStructure implements TypeStructure {
00037     protected TypeVariable var;
00038 /**
00039  * Insert the method's description here.
00040  * Creation date: (8/21/00 10:05:39 AM)
00041  * @param var edu.ksu.cis.bandera.abps.typing.TypeVariable
00042  */
00043 public BaseTypeStructure(TypeVariable var) {
00044     this.var = var;
00045 }
00046 /**
00047  * getCoerceConstraints method comment.
00048  */
00049 public java.util.Set genCoerceConstraints(TypeStructure ats) {
00050     Set set = new HashSet();
00051     if (ats instanceof BaseTypeStructure) {
00052         BaseTypeStructure bts = (BaseTypeStructure) ats;
00053         set.add(new CoerceConstraint(var, bts.var));
00054     } else
00055         System.out.println("Cannot mix type structures.");
00056     return set;
00057 }
00058 /**
00059  * getEqualConstraints method comment.
00060  */
00061 public java.util.Set genEqualConstraints(TypeStructure ats) {
00062     Set set = new HashSet();
00063     if (ats instanceof BaseTypeStructure) {
00064         BaseTypeStructure bts = (BaseTypeStructure) ats;
00065         set.add(new EqualConstraint(var, bts.var));
00066     } else
00067         System.out.println("Cannot mix type structures.");
00068     return set;
00069 }
00070 /**
00071  * Insert the method's description here.
00072  * Creation date: (8/21/00 10:06:47 AM)
00073  * @return edu.ksu.cis.bandera.abps.typing.TypeVariable
00074  */
00075 public TypeVariable getVar() {
00076     return var;
00077 }
00078 /**
00079  * Insert the method's description here.
00080  * Creation date: (8/21/00 10:06:47 AM)
00081  * @param newVar edu.ksu.cis.bandera.abps.typing.TypeVariable
00082  */
00083 protected void setVar(TypeVariable newVar) {
00084     var = newVar;
00085 }
00086 /**
00087  * Returns a String that represents the value of this object.
00088  * @return a string representation of the receiver
00089  */
00090 public String toString() {
00091     // Insert code to print the receiver here.
00092     // This implementation forwards the message to super. You may replace or supplement this.
00093     return super.toString();
00094 }
00095 }