CRM/Utils/Cache/NoCache.php

   1 <?php
   2 /*
   3  +--------------------------------------------------------------------+
   4  | CiviCRM version 4.5                                                |
   5  +--------------------------------------------------------------------+
   6  | Copyright CiviCRM LLC (c) 2004-2014                                |
   7  +--------------------------------------------------------------------+
   8  | This file is a part of CiviCRM.                                    |
   9  |                                                                    |
  10  | CiviCRM is free software; you can copy, modify, and distribute it  |
  11  | under the terms of the GNU Affero General Public License           |
  12  | Version 3, 19 November 2007 and the CiviCRM Licensing Exception.   |
  13  |                                                                    |
  14  | CiviCRM is distributed in the hope that it will be useful, but     |
  15  | WITHOUT ANY WARRANTY; without even the implied warranty of         |
  16  | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.               |
  17  | See the GNU Affero General Public License for more details.        |
  18  |                                                                    |
  19  | You should have received a copy of the GNU Affero General Public   |
  20  | License and the CiviCRM Licensing Exception along                  |
  21  | with this program; if not, contact CiviCRM LLC                     |
  22  | at info[AT]civicrm[DOT]org. If you have questions about the        |
  23  | GNU Affero General Public License or the licensing of CiviCRM,     |
  24  | see the CiviCRM license FAQ at http://civicrm.org/licensing        |
  25  +--------------------------------------------------------------------+
  26 */
  27
  28 /**
  29  *
  30  * @package CRM
  31  * @copyright CiviCRM LLC (c) 2004-2014
  32  * $Id$
  33  *
  34  */
  35
  36 class CRM_Utils_Cache_NoCache implements CRM_Utils_Cache_Interface {
  37
  38   /**
  39    * We only need one instance of this object. So we use the singleton
  40    * pattern and cache the instance in this variable
  41    *
  42    * @var object
  43    * @static
  44    */
  45   static private $_singleton = NULL;
  46
  47   /**
  48    * Constructor
  49    *
  50    * @param array $config an array of configuration params
  51    *
  52    * @return \CRM_Utils_Cache_NoCache
  53    */
  54   function __construct($config) {
  55   }
  56
  57   /**
  58    * @param string $key
  59    * @param mixed $value
  60    *
  61    * @return bool
  62    */
  63   function set($key, &$value) {
  64     return FALSE;
  65   }
  66
  67   /**
  68    * @param string $key
  69    *
  70    * @return null
  71    */
  72   function get($key) {
  73     return NULL;
  74   }
  75
  76   /**
  77    * @param string $key
  78    *
  79    * @return bool
  80    */
  81   function delete($key) {
  82     return FALSE;
  83   }
  84
  85   /**
  86    * @return bool
  87    */
  88   function flush() {
  89     return FALSE;
  90   }
  91 }
  92