IntrusiveEdge


1   /* ==========================================
2    * JGraphT : a free Java graph-theory library
3    * ==========================================
4    *
5    * Project Info:  http://jgrapht.sourceforge.net/
6    * Project Creator:  Barak Naveh (http://sourceforge.net/users/barak_naveh)
7    *
8    * (C) Copyright 2003-2006, by Barak Naveh and Contributors.
9    *
10   * This library is free software; you can redistribute it and/or modify it
11   * under the terms of the GNU Lesser General Public License as published by
12   * the Free Software Foundation; either version 2.1 of the License, or
13   * (at your option) any later version.
14   *
15   * This library is distributed in the hope that it will be useful, but
16   * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
17   * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
18   * License for more details.
19   *
20   * You should have received a copy of the GNU Lesser General Public License
21   * along with this library; if not, write to the Free Software Foundation,
22   * Inc.,
23   * 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
24   */
25  /* -------------------
26   * IntrusiveEdge.java
27   * -------------------
28   * (C) Copyright 2006-2006, by John V. Sichi and Contributors.
29   *
30   * Original Author:  John V. Sichi
31   * Contributor(s):   -
32   *
33   * $Id: IntrusiveEdge.java 504 2006-07-03 02:37:26Z perfecthash $
34   *
35   * Changes
36   * -------
37   * 28-May-2006 : Initial revision (JVS);
38   *
39   */
40  package org.jgrapht.graph;
41  
42  import java.io.*;
43  
44  
45  /**
46   * IntrusiveEdge encapsulates the internals for the default edge implementation.
47   * It is not intended to be referenced directly (which is why it's not public);
48   * use DefaultEdge for that.
49   *
50   * @author John V. Sichi
51   */
52  class IntrusiveEdge
53      implements Cloneable  , Serializable
54  {
55  
56      //~ Static fields/initializers --------------------------------------------
57  
58      private static final long serialVersionUID = 3258408452177932855L;
59  
60      //~ Instance fields -------------------------------------------------------
61  
62      Object   source;
63  
64      Object   target;
65  
66      //~ Methods ---------------------------------------------------------------
67  
68      /**
69       * @see Object#clone()
70       */
71      public Object   clone()
72      {
73          try {
74              return super.clone();
75          } catch (CloneNotSupportedException   e) {
76              // shouldn't happen as we are Cloneable
77              throw new InternalError  ();
78          }
79      }
80  }
81  
82  // End IntrusiveEdge.java
83
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