inc/classes/main/io/class_FrameworkFileOutputPointer.php

   1 <?php
   2 /**
   3  * A class for writing files
   4  *
   5  * @author              Roland Haeder <webmaster@ship-simu.org>
   6  * @version             0.0.0
   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.ship-simu.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 FrameworkFileOutputPointer extends BaseFrameworkSystem {
  25         /**
  26          * The current file we are working in
  27          */
  28         private $fileName = "";
  29
  30         /**
  31          * The file pointer
  32          */
  33         private $filePointer = null;
  34
  35         /**
  36          * Protected constructor
  37          */
  38         protected function __construct () {
  39                 // Call parent constructor
  40                 parent::__construct(__CLASS__);
  41
  42                 // Clean-up a little
  43                 $this->removeNumberFormaters();
  44                 $this->removeSystemArray();
  45         }
  46
  47         /**
  48          * Destructor for cleaning purposes, etc
  49          */
  50         public final function __destruct() {
  51                 // Is there a resource pointer? Then we have to close the file here!
  52                 if (is_resource($this->getPointer())) {
  53                         // Try to close a file
  54                         $this->closeFile();
  55                 }
  56
  57                 // Call the parent destructor
  58                 parent::__destruct();
  59         }
  60
  61         /**
  62          * Create a file pointer based on the given file. The file will also
  63          * be verified here.
  64          *
  65          * @param       $fileName       The file name we shall pass to fopen()
  66          * @param       $mode           The output mode ('w', 'a' are valid)
  67          * @throws      FileIsEmptyException    If the provided file name is empty.
  68          * @throws      FilePointerNotOpened    If fopen() returns not a file
  69          *                                                                      resource
  70          * @return      void
  71          */
  72         public final static function createFrameworkFileOutputPointer ($fileName, $mode) {
  73                 // Some pre-sanity checks...
  74                 if (is_null($fileName)) {
  75                         // No filename given
  76                         throw new FileIsEmptyException(null, self::EXCEPTION_UNEXPECTED_EMPTY_STRING);
  77                 }
  78
  79                 // Try to open a handler
  80                 $filePointer = @fopen($fileName, $mode);
  81                 if (($filePointer === null) || ($filePointer === false)) {
  82                         // Something bad happend
  83                         throw new FilePointerNotOpenedException ($fileName, self::EXCEPTION_FILE_POINTER_INVALID);
  84                 }
  85
  86                 // Create new instance
  87                 $pointerInstance = new FrameworkFileOutputPointer();
  88
  89                 // Set file pointer and file name
  90                 $pointerInstance->setPointer($filePointer);
  91                 $pointerInstance->setFileName($fileName);
  92
  93                 // Return the instance
  94                 return $pointerInstance;
  95         }
  96
  97         /**
  98          * Write data to a file pointer
  99          *
 100          * @param       $dataStream             The data stream we shall write to the file
 101          * @return      mixed                   The result of fwrite()
 102          * @throws      NullPointerException    If the file pointer instance
 103          *                                                                      is not set by setPointer()
 104          * @throws      InvalidFileResourceException    If there is being set
 105          *                                                                                      an invalid file resource
 106          */
 107         public function writeToFile ($dataStream) {
 108                 if (is_null($this->getPointer())) {
 109                         // Pointer not initialized
 110                         throw new NullPointerException($this, self::EXCEPTION_IS_NULL_POINTER);
 111                 } elseif (!is_resource($this->getPointer())) {
 112                         // Pointer is not a valid resource!
 113                         throw new InvalidFileResourceException($this, self::EXCEPTION_INVALID_DIRECTORY_POINTER);
 114                 }
 115
 116                 // Read data from the file pointer and return it
 117                 return fwrite($this->getPointer(), $dataStream);
 118         }
 119
 120         /**
 121          * Close a file source and set it's instance to null and the file name
 122          * to empty
 123          *
 124          * @return      void
 125          * @throws      NullPointerException    If the file pointer instance
 126          *                                                                      is not set by setPointer()
 127          * @throws      InvalidFileResourceException    If there is being set
 128          */
 129         public function closeFile () {
 130                 if (is_null($this->getPointer())) {
 131                         // Pointer not initialized
 132                         throw new NullPointerException($this, self::EXCEPTION_IS_NULL_POINTER);
 133                 } elseif (!is_resource($this->getPointer())) {
 134                         // Pointer is not a valid resource!
 135                         throw new InvalidFileResourceException($this, self::EXCEPTION_INVALID_DIRECTORY_POINTER);
 136                 }
 137
 138                 // Close the file pointer and reset the instance variable
 139                 @fclose($this->getPointer());
 140                 $this->setPointer(null);
 141                 $this->setFileName("");
 142         }
 143
 144         /**
 145          * Setter for the file pointer
 146          *
 147          * @param       $filePointer    File resource
 148          * @return      void
 149          */
 150         public final function setPointer ($filePointer) {
 151                 // Sanity-check if pointer is a valid file resource
 152                 if (is_resource($filePointer) || is_null($filePointer)) {
 153                         // Is a valid resource
 154                         $this->filePointer = $filePointer;
 155                 } else {
 156                         // Throw exception
 157                         throw new InvalidFileResourceException($this, self::EXCEPTION_INVALID_DIRECTORY_POINTER);
 158                 }
 159         }
 160
 161         /**
 162          * Getter for the file pointer
 163          *
 164          * @return      $filePointer    The file pointer which shall be a valid
 165          *                                                      file resource
 166          */
 167         public final function getPointer () {
 168                 return $this->filePointer;
 169         }
 170
 171         /**
 172          * Setter for file name
 173          *
 174          * @param       $fileName       The new file name
 175          * @return      void
 176          */
 177         public final function setFileName ($fileName) {
 178                 $fileName = (string) $fileName;
 179                 $this->fileName = $fileName;
 180         }
 181
 182         /**
 183          * Getter for file name
 184          *
 185          * @return      $fileName       The current file name
 186          */
 187         public final function getFileName () {
 188                 return $this->fileName;
 189         }
 190 }
 191
 192 // [EOF]
 193 ?>