KickJava   Java API By Example, From Geeks To Geeks.

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


1 /* Soot - a J*va Optimization Framework
2  * Copyright (C) 2002 Florian Loitsch
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
26
27 package soot.toolkits.scalar;
28
29 import soot.*;
30 import soot.util.*;
31 import java.util.*;
32
33 /**
34  * provides functional code for most of the methods. Subclasses are invited to
35  * provide a more efficient version. Most often this will be done in the
36  * following way:<br>
37  * <pre>
38  * public void yyy(FlowSet dest) {
39  * if (dest instanceof xxx) {
40  * blahblah;
41  * } else
42  * super.yyy(dest)
43  * }
44  * </pre>
45  */

46
47 public abstract class AbstractBoundedFlowSet extends AbstractFlowSet implements
48                                                                BoundedFlowSet {
49   
50   public void complement() {
51     complement(this);
52   }
53
54   public void complement(FlowSet dest) {
55     if (this == dest)
56       complement();
57     else {
58       BoundedFlowSet tmp = (BoundedFlowSet)topSet();
59       tmp.difference(this, dest);
60     }
61   }
62
63   public Object JavaDoc topSet() {
64     BoundedFlowSet tmp = (BoundedFlowSet)emptySet();
65     tmp.complement();
66     return tmp;
67   }
68 }
69
Popular Tags