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Java > Open Source Codes > org > jgrapht > graph > ClassBasedEdgeFactory


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  * ClassBasedEdgeFactory.java
27  * ------------------
28  * (C) Copyright 2003-2006, by Barak Naveh and Contributors.
29  *
30  * Original Author: Barak Naveh
31  * Contributor(s): Christian Hammer
32  *
33  * $Id: ClassBasedEdgeFactory.java 504 2006-07-03 02:37:26Z perfecthash $
34  *
35  * Changes
36  * -------
37  * 24-Jul-2003 : Initial revision (BN);
38  * 04-Aug-2003 : Renamed from EdgeFactoryFactory & made utility class (BN);
39  * 03-Nov-2003 : Made edge factories serializable (BN);
40  * 11-Mar-2004 : Made generic (CH);
41  * 28-May-2006 : Moved connectivity info from edge to graph (JVS);
42  *
43  */
44 package org.jgrapht.graph;
45
46 import java.io.*;
47
48 import org.jgrapht.*;
49
50
51 /**
52  * An EdgeFactory for producing edges by using a class as a factory.
53  *
54  * @author Barak Naveh
55  * @since Jul 14, 2003
56  */
57 public class ClassBasedEdgeFactory<V, E>
58     implements EdgeFactory<V, E>, Serializable
59 {
60
61     //~ Static fields/initializers --------------------------------------------
62
63     private static final long serialVersionUID = 3618135658586388792L;
64
65     //~ Instance fields -------------------------------------------------------
66
67     private final Class JavaDoc<? extends E> edgeClass;
68
69     //~ Constructors ----------------------------------------------------------
70
71     public ClassBasedEdgeFactory(Class JavaDoc<? extends E> edgeClass)
72     {
73         this.edgeClass = edgeClass;
74     }
75
76     //~ Methods ---------------------------------------------------------------
77
78     /**
79      * @see EdgeFactory#createEdge(Object, Object)
80      */
81     public E createEdge(V source, V target)
82     {
83         try {
84             return edgeClass.newInstance();
85         } catch (Exception JavaDoc ex) {
86             throw new RuntimeException JavaDoc("Edge factory failed", ex);
87         }
88     }
89 }
90
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