ReverseDepthFirstSearch


1   /*
2    * Bytecode Analysis Framework
3    * Copyright (C) 2003,2004 University of Maryland
4    * 
5    * This library is free software; you can redistribute it and/or
6    * modify it under the terms of the GNU Lesser General Public
7    * License as published by the Free Software Foundation; either
8    * version 2.1 of the License, or (at your option) any later version.
9    * 
10   * This library is distributed in the hope that it will be useful,
11   * but WITHOUT ANY WARRANTY; without even the implied warranty of
12   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13   * Lesser General Public License for more details.
14   * 
15   * You should have received a copy of the GNU Lesser General Public
16   * License along with this library; if not, write to the Free Software
17   * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
18   */
19  
20  package edu.umd.cs.findbugs.ba;
21  
22  /**
23   * Algorithm to perform a reverse depth first search on a CFG.
24   * (I.e., depth first search on reversed CFG.)
25   *
26   * @see CFG
27   * @author David Hovemeyer
28   */
29  public class ReverseDepthFirstSearch
30      extends edu.umd.cs.findbugs.graph.ReverseDepthFirstSearch<CFG, Edge, BasicBlock>
31  {
32      private BasicBlock firstRoot;
33  
34      /**
35       * Constructor.
36       *
37       * @param cfg the CFG to perform the reverse depth first search on
38       */
39      public ReverseDepthFirstSearch(CFG cfg) {
40          super(cfg);
41          this.firstRoot = cfg.getExit();
42      }
43  
44      @Override  
45           protected BasicBlock getNextSearchTreeRoot() {
46          BasicBlock result = firstRoot;
47          firstRoot = null;
48          return result;
49      }
50  }
51  
52  // vim:ts=4
53

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