PdfNull


1   /*
2     Copyright � 2006 Stefano Chizzolini. http://clown.stefanochizzolini.it
3   
4     Contributors:
5       * Stefano Chizzolini (original code developer, info@stefanochizzolini.it):
6         contributed code is Copyright � 2006 by Stefano Chizzolini.
7   
8     This file should be part of the source code distribution of "PDF Clown library"
9     (the Program): see the accompanying README files for more info.
10  
11    This Program is free software; you can redistribute it and/or modify it under
12    the terms of the GNU General Public License as published by the Free Software
13    Foundation; either version 2 of the License, or (at your option) any later version.
14  
15    This Program is distributed in the hope that it will be useful, but WITHOUT ANY
16    WARRANTY, either expressed or implied; without even the implied warranty of
17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the License for more details.
18  
19    You should have received a copy of the GNU General Public License along with this
20    Program (see README files); if not, go to the GNU website (http://www.gnu.org/).
21  
22    Redistribution and use, with or without modification, are permitted provided that such
23    redistributions retain the above copyright notice, license and disclaimer, along with
24    this list of conditions.
25  */
26  
27  package it.stefanochizzolini.clown.objects;
28  
29  import it.stefanochizzolini.clown.files.File;
30  
31  /**
32    PDF null object [PDF:1.6:3.2.8].
33  */
34  public final class PdfNull
35    extends PdfAtomicObject<Object  >
36  {
37    // <class>
38    // <static>
39    // <fields>
40    public static final PdfNull Null = new PdfNull();
41    // </fields>
42    // </static>
43  
44    // <dynamic>
45    // <constructors>
46    private PdfNull(
47      )
48    {}
49    // </constructors>
50  
51    // <interface>
52    // <public>
53    @Override  
54    public Object   clone(
55      File context
56      )
57    {
58      /*
59        NOTE: There is only one object of type null [PDF:1.6:3.2.8],
60        so cloning is unsuitable.
61      */
62      return Null;
63    }
64  
65    @Override  
66    public String   toPdf(
67      )
68    {return "null";}
69    // </public>
70    // </interface>
71    // </dynamic>
72    // </class>
73  }
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