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<?php
/**
* Zend Framework
*
* LICENSE
*
* This source file is subject to the new BSD license that is bundled
* with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://framework.zend.com/license/new-bsd
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@zend.com so we can send you a copy immediately.
*
* @category Zend
* @package Zend_Cache
* @copyright Copyright (c) 2005-2007 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
/**
* @package Zend_Cache
* @copyright Copyright (c) 2005-2007 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
abstract class Zend_Cache
{
/**
* Available frontends
*
* @var array $availableFrontends array of frontend name (string)
*/
public static $availableFrontends = array('Core', 'Output', 'Class', 'File', 'Function', 'Page');
/**
* Available backends
*
* @var array $availableBackends array of backends name (string)
*/
public static $availableBackends = array('File', 'Sqlite', 'Memcached', 'Apc', 'ZendPlatform');
/**
* Consts for clean() method
*/
const CLEANING_MODE_ALL = 'all';
const CLEANING_MODE_OLD = 'old';
const CLEANING_MODE_MATCHING_TAG = 'matchingTag';
const CLEANING_MODE_NOT_MATCHING_TAG = 'notMatchingTag';
/**
* Factory
*
* @param string $frontend frontend name
* @param string $backend backend name
* @param array $frontendOptions associative array of options for the corresponding frontend constructor
* @param array $backendOptions associative array of options for the corresponding backend constructor
*/
public static function factory($frontend, $backend, $frontendOptions = array(), $backendOptions = array())
{
// because lowercase will fail
$frontend = self::_normalizeName($frontend);
$backend = self::_normalizeName($backend);
if (!in_array($frontend, self::$availableFrontends)) {
self::throwException("Incorrect frontend ($frontend)");
}
if (!in_array($backend, Zend_Cache::$availableBackends)) {
self::throwException("Incorrect backend ($backend)");
}
// For perfs reasons, with frontend == 'Core', we can interact with the Core itself
$frontendClass = 'Zend_Cache_' . ($frontend != 'Core' ? 'Frontend_' : '') . $frontend;
$backendClass = 'Zend_Cache_Backend_' . $backend;
// For perfs reasons, we do not use the Zend_Loader::loadClass() method
// (security controls are explicit)
require_once str_replace('_', DIRECTORY_SEPARATOR, $frontendClass) . '.php';
require_once str_replace('_', DIRECTORY_SEPARATOR, $backendClass) . '.php';
$frontendObject = new $frontendClass($frontendOptions);
$backendObject = new $backendClass($backendOptions);
$frontendObject->setBackend($backendObject);
return $frontendObject;
}
/**
* Throw an exception
*
* Note : for perf reasons, the "load" of Zend/Cache/Exception is dynamic
*/
public static function throwException($msg)
{
// For perfs reasons, we use this dynamic inclusion
require_once 'Zend/Cache/Exception.php';
throw new Zend_Cache_Exception($msg);
}
/**
* Normalize frontend and backend names to allow multiple words TitleCased
*
* @param string $name
* @return string
*/
protected static function _normalizeName($name)
{
$name = ucfirst(strtolower($name));
$name = str_replace(array('-', '_', '.'), ' ', $name);
$name = ucwords($name);
$name = str_replace(' ', '', $name);
return $name;
}
}
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