1: <?php
  2: 
  3: /*
  4:  * This file is part of SwiftMailer.
  5:  * (c) 2004-2009 Chris Corbyn
  6:  *
  7:  * For the full copyright and license information, please view the LICENSE
  8:  * file that was distributed with this source code.
  9:  */
 10: 
 11: /**
 12:  * A null KeyCache that does not cache at all.
 13:  * @package Swift
 14:  * @subpackage KeyCache
 15:  * @author Chris Corbyn
 16:  */
 17: class Swift_KeyCache_NullKeyCache implements Swift_KeyCache
 18: {
 19:     /**
 20:      * Set a string into the cache under $itemKey for the namespace $nsKey.
 21:      * @param string $nsKey
 22:      * @param string $itemKey
 23:      * @param string $string
 24:      * @param int    $mode
 25:      * @see MODE_WRITE, MODE_APPEND
 26:      */
 27:     public function setString($nsKey, $itemKey, $string, $mode)
 28:     {
 29:     }
 30: 
 31:     /**
 32:      * Set a ByteStream into the cache under $itemKey for the namespace $nsKey.
 33:      * @param string                 $nsKey
 34:      * @param string                 $itemKey
 35:      * @param Swift_OutputByteStream $os
 36:      * @param int                    $mode
 37:      * @see MODE_WRITE, MODE_APPEND
 38:      */
 39:     public function importFromByteStream($nsKey, $itemKey, Swift_OutputByteStream $os, $mode)
 40:     {
 41:     }
 42: 
 43:     /**
 44:      * Provides a ByteStream which when written to, writes data to $itemKey.
 45:      * NOTE: The stream will always write in append mode.
 46:      * @param  string                $nsKey
 47:      * @param  string                $itemKey
 48:      * @return Swift_InputByteStream
 49:      */
 50:     public function getInputByteStream($nsKey, $itemKey, Swift_InputByteStream $writeThrough = null)
 51:     {
 52:     }
 53: 
 54:     /**
 55:      * Get data back out of the cache as a string.
 56:      * @param  string $nsKey
 57:      * @param  string $itemKey
 58:      * @return string
 59:      */
 60:     public function getString($nsKey, $itemKey)
 61:     {
 62:     }
 63: 
 64:     /**
 65:      * Get data back out of the cache as a ByteStream.
 66:      * @param string                $nsKey
 67:      * @param string                $itemKey
 68:      * @param Swift_InputByteStream $is      to write the data to
 69:      */
 70:     public function exportToByteStream($nsKey, $itemKey, Swift_InputByteStream $is)
 71:     {
 72:     }
 73: 
 74:     /**
 75:      * Check if the given $itemKey exists in the namespace $nsKey.
 76:      * @param  string  $nsKey
 77:      * @param  string  $itemKey
 78:      * @return boolean
 79:      */
 80:     public function hasKey($nsKey, $itemKey)
 81:     {
 82:         return false;
 83:     }
 84: 
 85:     /**
 86:      * Clear data for $itemKey in the namespace $nsKey if it exists.
 87:      * @param string $nsKey
 88:      * @param string $itemKey
 89:      */
 90:     public function clearKey($nsKey, $itemKey)
 91:     {
 92:     }
 93: 
 94:     /**
 95:      * Clear all data in the namespace $nsKey if it exists.
 96:      * @param string $nsKey
 97:      */
 98:     public function clearAll($nsKey)
 99:     {
100:     }
101: }
102: