01: /*
02: Copyright © 2006 Stefano Chizzolini. http://clown.stefanochizzolini.it
03:
04: Contributors:
05: * Stefano Chizzolini (original code developer, http://www.stefanochizzolini.it):
06: contributed code is Copyright © 2006 by Stefano Chizzolini.
07:
08: This file should be part of the source code distribution of "PDF Clown library"
09: (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 extends PdfAtomicObject<Object> {
35: // <class>
36: // <static>
37: // <fields>
38: public static final PdfNull Null = new PdfNull();
39:
40: // </fields>
41: // </static>
42:
43: // <dynamic>
44: // <constructors>
45: private PdfNull() {
46: }
47:
48: // </constructors>
49:
50: // <interface>
51: // <public>
52: @Override
53: public Object clone(File context) {
54: /*
55: NOTE: There is only one object of type null [PDF:1.6:3.2.8],
56: so cloning is unsuitable.
57: */
58: return Null;
59: }
60:
61: @Override
62: public String toPdf() {
63: return "null";
64: }
65: // </public>
66: // </interface>
67: // </dynamic>
68: // </class>
69: }
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