Continued with renaming-season:
[core.git] / framework / main / classes / file_directories / output / raw / class_FrameworkRawFileOutputPointer.php
1 <?php
2 // Own namespace
3 namespace CoreFramework\Filesystem\Pointer\Raw;
4
5 // Import framework stuff
6 use CoreFramework\Generic\NullPointerException;
7
8 /**
9  * A class for writing files
10  *
11  * @author              Roland Haeder <webmaster@shipsimu.org>
12  * @version             0.0.0
13  * @copyright   Copyright (c) 2007, 2008 Roland Haeder, 2009 - 2017 Core Developer Team
14  * @license             GNU GPL 3.0 or any newer version
15  * @link                http://www.shipsimu.org
16  *
17  * This program is free software: you can redistribute it and/or modify
18  * it under the terms of the GNU General Public License as published by
19  * the Free Software Foundation, either version 3 of the License, or
20  * (at your option) any later version.
21  *
22  * This program is distributed in the hope that it will be useful,
23  * but WITHOUT ANY WARRANTY; without even the implied warranty of
24  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
25  * GNU General Public License for more details.
26  *
27  * You should have received a copy of the GNU General Public License
28  * along with this program. If not, see <http://www.gnu.org/licenses/>.
29  */
30 class FrameworkRawFileOutputPointer extends BaseFileIo implements OutputPointer {
31         /**
32          * Protected constructor
33          *
34          * @return      void
35          */
36         protected function __construct () {
37                 // Call parent constructor
38                 parent::__construct(__CLASS__);
39         }
40
41         /**
42          * Create a file pointer based on the given file. The file will also
43          * be verified here.
44          *
45          * @param       $fileName       The file name we shall pass to fopen()
46          * @param       $mode           The output mode ('w', 'a' are valid)
47          * @throws      FileIsEmptyException    If the provided file name is empty.
48          * @throws      FileIoException                 If fopen() returns not a file resource
49          * @return      void
50          */
51         public static final function createFrameworkRawFileOutputPointer ($fileName, $mode) {
52                 // Some pre-sanity checks...
53                 if (is_null($fileName)) {
54                         // No filename given
55                         throw new FileIsEmptyException(NULL, self::EXCEPTION_UNEXPECTED_EMPTY_STRING);
56                 } // END - if
57
58                 // Try to open a handler
59                 $filePointer = @fopen($fileName, $mode);
60                 if ((is_null($filePointer)) || ($filePointer === FALSE)) {
61                         // Something bad happend
62                         throw new FileIoException ($fileName, self::EXCEPTION_FILE_POINTER_INVALID);
63                 } // END - if
64
65                 // Create new instance
66                 $pointerInstance = new FrameworkRawFileOutputPointer();
67
68                 // Set file pointer and file name
69                 $pointerInstance->setPointer($filePointer);
70                 $pointerInstance->setFileName($fileName);
71
72                 // Return the instance
73                 return $pointerInstance;
74         }
75
76         /**
77          * Write data to a file pointer
78          *
79          * @param       $dataStream             The data stream we shall write to the file
80          * @return      mixed                   Number of writes bytes or FALSE on error
81          * @throws      NullPointerException    If the file pointer instance
82          *                                                                      is not set by setPointer()
83          * @throws      InvalidResourceException        If there is being set
84          *                                                                                      an invalid file resource
85          */
86         public function writeToFile ($dataStream) {
87                 if (is_null($this->getPointer())) {
88                         // Pointer not initialized
89                         throw new NullPointerException($this, self::EXCEPTION_IS_NULL_POINTER);
90                 } elseif (!is_resource($this->getPointer())) {
91                         // Pointer is not a valid resource!
92                         throw new InvalidResourceException($this, self::EXCEPTION_INVALID_RESOURCE);
93                 }
94
95                 // Write data to the file pointer and return written bytes
96                 return fwrite($this->getPointer(), $dataStream);
97         }
98
99         /**
100          * Analyzes entries in index file. This will count all found (and valid)
101          * entries, mark invalid as damaged and count gaps ("fragmentation"). If
102          * only gaps are found, the file is considered as "virgin" (no entries).
103          *
104          * @return      void
105          * @throws      UnsupportedOperationException   If this method is called
106          */
107         public function analyzeFile () {
108                 throw new UnsupportedOperationException(array($this, __FUNCTION__), self::EXCEPTION_UNSPPORTED_OPERATION);
109         }
110
111         /**
112          * Writes at given position by seeking to it.
113          *
114          * @param       $seekPosition   Seek position in file
115          * @param       $data                   Data to be written
116          * @return      mixed                   Number of writes bytes or FALSE on error
117          * @throws      UnsupportedOperationException   If this method is called
118          */
119         public function writeAtPosition ($seedPosition, $data) {
120                 throw new UnsupportedOperationException(array($this, __FUNCTION__), self::EXCEPTION_UNSPPORTED_OPERATION);
121         }
122
123         /**
124          * Advances to next "block" of bytes
125          *
126          * @return      void
127          * @throws      UnsupportedOperationException   If this method is called
128          */
129         public function next () {
130                 throw new UnsupportedOperationException(array($this, __FUNCTION__), self::EXCEPTION_UNSPPORTED_OPERATION);
131         }
132
133         /**
134          * Checks wether the current entry is valid (not at the end of the file).
135          * This method will return TRUE if an emptied (nulled) entry has been found.
136          *
137          * @return      $isValid        Whether the next entry is valid
138          * @throws      UnsupportedOperationException   If this method is called
139          */
140         public function valid () {
141                 throw new UnsupportedOperationException(array($this, __FUNCTION__), self::EXCEPTION_UNSPPORTED_OPERATION);
142         }
143
144         /**
145          * Gets current seek position ("key").
146          *
147          * @return      $key    Current key in iteration
148          * @throws      UnsupportedOperationException   If this method is called
149          */
150         public function key () {
151                 throw new UnsupportedOperationException(array($this, __FUNCTION__), self::EXCEPTION_UNSPPORTED_OPERATION);
152         }
153
154 }