Current Path : C:/Users/Mahmood/Desktop/moodle/lib/htmlpurifier/HTMLPurifier/ |
Current File : C:/Users/Mahmood/Desktop/moodle/lib/htmlpurifier/HTMLPurifier/DefinitionCacheFactory.php |
<?php /** * Responsible for creating definition caches. */ class HTMLPurifier_DefinitionCacheFactory { /** * @type array */ protected $caches = array('Serializer' => array()); /** * @type array */ protected $implementations = array(); /** * @type HTMLPurifier_DefinitionCache_Decorator[] */ protected $decorators = array(); /** * Initialize default decorators */ public function setup() { $this->addDecorator('Cleanup'); } /** * Retrieves an instance of global definition cache factory. * @param HTMLPurifier_DefinitionCacheFactory $prototype * @return HTMLPurifier_DefinitionCacheFactory */ public static function instance($prototype = null) { static $instance; if ($prototype !== null) { $instance = $prototype; } elseif ($instance === null || $prototype === true) { $instance = new HTMLPurifier_DefinitionCacheFactory(); $instance->setup(); } return $instance; } /** * Registers a new definition cache object * @param string $short Short name of cache object, for reference * @param string $long Full class name of cache object, for construction */ public function register($short, $long) { $this->implementations[$short] = $long; } /** * Factory method that creates a cache object based on configuration * @param string $type Name of definitions handled by cache * @param HTMLPurifier_Config $config Config instance * @return mixed */ public function create($type, $config) { $method = $config->get('Cache.DefinitionImpl'); if ($method === null) { return new HTMLPurifier_DefinitionCache_Null($type); } if (!empty($this->caches[$method][$type])) { return $this->caches[$method][$type]; } if (isset($this->implementations[$method]) && class_exists($class = $this->implementations[$method], false)) { $cache = new $class($type); } else { if ($method != 'Serializer') { trigger_error("Unrecognized DefinitionCache $method, using Serializer instead", E_USER_WARNING); } $cache = new HTMLPurifier_DefinitionCache_Serializer($type); } foreach ($this->decorators as $decorator) { $new_cache = $decorator->decorate($cache); // prevent infinite recursion in PHP 4 unset($cache); $cache = $new_cache; } $this->caches[$method][$type] = $cache; return $this->caches[$method][$type]; } /** * Registers a decorator to add to all new cache objects * @param HTMLPurifier_DefinitionCache_Decorator|string $decorator An instance or the name of a decorator */ public function addDecorator($decorator) { if (is_string($decorator)) { $class = "HTMLPurifier_DefinitionCache_Decorator_$decorator"; $decorator = new $class; } $this->decorators[$decorator->name] = $decorator; } } // vim: et sw=4 sts=4