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Java > Open Source Codes > soot > toolkits > scalar > LocalUnitPair


1 /* Soot - a J*va Optimization Framework
2  * Copyright (C) 1997-1999 Raja Vallee-Rai
3  *
4  * This library is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
7  * version 2.1 of the License, or (at your option) any later version.
8  *
9  * This library is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  * Lesser General Public License for more details.
13  *
14  * You should have received a copy of the GNU Lesser General Public
15  * License along with this library; if not, write to the
16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17  * Boston, MA 02111-1307, USA.
18  */
19
20 /*
21  * Modified by the Sable Research Group and others 1997-1999.
22  * See the 'credits' file distributed with Soot for the complete list of
23  * contributors. (Soot is distributed at http://www.sable.mcgill.ca/soot)
24  */
25
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30
31 package soot.toolkits.scalar;
32
33 import soot.*;
34
35
36 /**
37  * Utility class used to package a Local and a Unit together.
38  */
39 public class LocalUnitPair
40 {
41     Local local;
42     Unit unit;
43
44     /**
45      * Constructs a LocalUnitPair from a Unit object and a Local object.
46      * @param local some Local
47      * @param unit some Unit.
48      */
49     public LocalUnitPair(Local local, Unit unit)
50     {
51         this.local = local;
52         this.unit = unit;
53     }
54
55     /**
56      * Two LocalUnitPairs are equal iff they hold the same Unit objects and
57      * the same Local objects within them.
58      * @param other another LocalUnitPair
59      * @return true if other contains the same objects as this.
60      */
61     public boolean equals(Object JavaDoc other)
62     {
63         if(other instanceof LocalUnitPair &&
64             ((LocalUnitPair) other).local == this.local &&
65             ((LocalUnitPair) other).unit == this.unit)
66         {
67             return true;
68         }
69         else
70             return false;
71     }
72
73     public int hashCode()
74     {
75         return local.hashCode() * 101 + unit.hashCode() + 17;
76     }
77 }
78
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