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002395de09
- Move serialization responsibility to Config - Create DefinitionCacheFactory - Implement Null definition cache git-svn-id: http://htmlpurifier.org/svnroot/htmlpurifier/trunk@1117 48356398-32a2-884e-a903-53898d9a118a
82 lines
2.5 KiB
PHP
82 lines
2.5 KiB
PHP
<?php
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require_once 'HTMLPurifier/DefinitionCache.php';
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HTMLPurifier_ConfigSchema::define(
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'Core', 'DefinitionCache', 'Serializer', 'string/null', '
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This directive defines which method to use when caching definitions,
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the complex data-type that makes HTML Purifier tick. Set to null
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to disable caching (not recommended, as you will see a definite
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performance degradation). This directive has been available since 1.7.0.
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');
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HTMLPurifier_ConfigSchema::defineAllowedValues(
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'Core', 'DefinitionCache', array('Serializer')
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);
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/**
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* Responsible for creating definition caches.
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*/
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class HTMLPurifier_DefinitionCacheFactory
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{
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var $caches = array('Serializer' => array());
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var $decorators = array();
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/**
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* Retrieves an instance of global definition cache factory.
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* @static
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*/
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function &instance($prototype = null) {
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static $instance;
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if ($prototype !== null) {
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$instance = $prototype;
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} elseif ($instance === null || $prototype === true) {
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$instance = new HTMLPurifier_DefinitionCacheFactory();
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}
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return $instance;
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}
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/**
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* Factory method that creates a cache object based on configuration
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* @param $name Name of definitions handled by cache
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* @param $config Instance of HTMLPurifier_Config
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*/
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function &create($type, $config) {
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// only one implementation as for right now, $config will
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// be used to determine implementation
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$method = $config->get('Core', 'DefinitionCache');
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if ($method === null) {
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$null = new HTMLPurifier_DefinitionCache_Null($type);
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return $null;
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}
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if (!empty($this->caches[$method][$type])) {
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return $this->caches[$method][$type];
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}
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$cache = new HTMLPurifier_DefinitionCache_Serializer($type);
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foreach ($this->decorators as $decorator) {
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$new_cache = $decorator->decorate($cache);
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// prevent infinite recursion in PHP 4
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unset($cache);
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$cache = $new_cache;
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}
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$this->caches[$method][$type] = $cache;
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return $this->caches[$method][$type];
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}
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/**
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* Registers a decorator to add to all new cache objects
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* @param
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*/
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function addDecorator($decorator) {
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if (is_string($decorator)) {
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$class = "HTMLPurifier_DefinitionCache_Decorator_$decorator";
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$decorator = new $class;
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}
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$this->decorators[] = $decorator;
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}
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}
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?>
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