Method constructor() removed, several small fixes
[shipsimu.git] / inc / classes / main / compressor / class_NullCompressor.php
1 <?php
2 /**
3  * Null compression and decompression class
4  *
5  * @author              Roland Haeder <webmaster@ship-simu.org>
6  * @version             0.3.0
7  * @copyright   Copyright(c) 2007, 2008 Roland Haeder, this is free software
8  * @license             GNU GPL 3.0 or any newer version
9  * @link                http://www.mxchange.org
10  *
11  * This program is free software: you can redistribute it and/or modify
12  * it under the terms of the GNU General Public License as published by
13  * the Free Software Foundation, either version 3 of the License, or
14  * (at your option) any later version.
15  *
16  * This program is distributed in the hope that it will be useful,
17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
19  * GNU General Public License for more details.
20  *
21  * You should have received a copy of the GNU General Public License
22  * along with this program. If not, see <http://www.gnu.org/licenses/>.
23  */
24 class NullCompressor extends BaseFrameworkSystem implements Compressor {
25         /**
26          * Protected constructor
27          *
28          * @return      void
29          */
30         protected function __construct () {
31                 // Call parent constructor!
32                 parent::__construct(__CLASS__);
33
34                 // Debug message
35                 if (((defined('DEBUG_COMPRESSOR')) || (defined('DEBUG_ALL'))) && (defined('DEBUG_CONSTRUCT'))) $this->getDebugInstance()->output(sprintf("[%s:] Konstruktor erreicht.<br />\n",
36                         $this->__toString()
37                 ));
38
39                 // Set description
40                 $this->setObjectDescription("Null-Kompressor");
41
42                 // Create an unique ID
43                 $this->createUniqueID();
44         }
45
46         /**
47          * Create a new compressor channel based a given compression handler
48          *
49          * @return      $cInstance      An instance of this class
50          */
51         public final static function createNullCompressor () {
52                 // Get new instance
53                 $cInstance = new NullCompressor();
54
55                 // Return the compressor instance
56                 return $cInstance;
57         }
58
59         /**
60          * Null compression stream
61          *
62          * @param       $streamData             Mixed non-object stream data
63          * @return      $streamData             The compressed stream data      
64          * @throws      InvalidObjectException  If the stream is an object
65          */
66         public function compressStream ($streamData) {
67                 if (is_object($streamData)) {
68                         // Throw an exception
69                         throw new InvalidObjectException($streamData, self::EXCEPTION_UNEXPECTED_OBJECT);
70                 }
71
72                 // Return the compressed stream
73                 return $streamData;
74         }
75
76         /**
77          * Null decompression stream
78          *
79          * @param       $streamData             Mixed non-object stream data
80          * @return      $streamData             The decompressed stream data    
81          * @throws      InvalidObjectException  If the stream is an object
82          */
83         public function decompressStream ($streamData) {
84                 if (is_object($streamData)) {
85                         // Throw an exception
86                         throw new InvalidObjectException($streamData, self::EXCEPTION_UNEXPECTED_OBJECT);
87                 }
88
89                 // Return the decompressed stream
90                 return $streamData;
91         }
92
93         /**
94          * Getter for the file extension of this compressor
95          *
96          * @return      $string         Returns always "null"
97          */
98         public final function getCompressorExtension () {
99                 if ((defined('DEBUG_COMPRESSOR')) || (defined('DEBUG_ALL'))) $this->getDebugInstance()->output(sprintf("[%s:] Dateierweiterung angefordert.<br />\n",
100                         $this->__toString()
101                 ));
102                 return "null";
103         }
104 }
105
106 // [EOF]
107 ?>