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Source code: gnu/java/security/prng/RandomEvent.java


1   /* RandomEvent.java -- an event with random data.
2      Copyright (C) 2004, 2006 Free Software Foundation, Inc.
3   
4   This file is a part of GNU Classpath.
5   
6   GNU Classpath is free software; you can redistribute it and/or modify
7   it under the terms of the GNU General Public License as published by
8   the Free Software Foundation; either version 2 of the License, or (at
9   your option) any later version.
10  
11  GNU Classpath is distributed in the hope that it will be useful, but
12  WITHOUT ANY WARRANTY; without even the implied warranty of
13  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14  General Public License for more details.
15  
16  You should have received a copy of the GNU General Public License
17  along with GNU Classpath; if not, write to the Free Software
18  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
19  USA
20  
21  Linking this library statically or dynamically with other modules is
22  making a combined work based on this library.  Thus, the terms and
23  conditions of the GNU General Public License cover the whole
24  combination.
25  
26  As a special exception, the copyright holders of this library give you
27  permission to link this library with independent modules to produce an
28  executable, regardless of the license terms of these independent
29  modules, and to copy and distribute the resulting executable under
30  terms of your choice, provided that you also meet, for each linked
31  independent module, the terms and conditions of the license of that
32  module.  An independent module is a module which is not derived from
33  or based on this library.  If you modify this library, you may extend
34  this exception to your version of the library, but you are not
35  obligated to do so.  If you do not wish to do so, delete this
36  exception statement from your version.  */
37  
38  
39  package gnu.java.security.prng;
40  
41  import java.util.EventObject;
42  
43  /**
44   * An interface for entropy accumulators that will be notified of random
45   * events.
46   */
47  public class RandomEvent extends EventObject
48  {
49  
50    private final byte sourceNumber;
51  
52    private final byte poolNumber;
53  
54    private final byte[] data;
55  
56    public RandomEvent(Object source, byte sourceNumber, byte poolNumber,
57                       byte[] data)
58    {
59      super(source);
60      this.sourceNumber = sourceNumber;
61      this.poolNumber = poolNumber;
62      if (data.length == 0 || data.length > 32)
63        throw new IllegalArgumentException(
64                                           "random events take between 1 and 32 bytes of data");
65      this.data = (byte[]) data.clone();
66    }
67  
68    public byte getSourceNumber()
69    {
70      return sourceNumber;
71    }
72  
73    public byte getPoolNumber()
74    {
75      return poolNumber;
76    }
77  
78    public byte[] getData()
79    {
80      return data;
81    }
82  }