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Java > Open Source Codes > soot > toolkits > graph > ReversibleGraph


1 /* Soot - a J*va Optimization Framework
2  * Copyright (C) 2005 Navindra Umanee <navindra@cs.mcgill.ca>
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 package soot.toolkits.graph;
21
22 /**
23  * DirectedGraph which can be reversed and re-reversed.
24  *
25  * @author Navindra Umanee
26  **/
27 public interface ReversibleGraph extends MutableDirectedGraph
28 {
29     /**
30      * Returns true if the graph is now reversed from its original state
31      * at creation.
32      **/
33     public boolean isReversed();
34
35     /**
36      * Reverse the edges of the current graph and swap head and tail
37      * nodes. Returns self.
38      **/
39     public ReversibleGraph reverse();
40 }
41
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