| <?php |
| /** |
| * File containing the ezcPersistentCacheManager class. |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| * @package PersistentObject |
| * @version //autogen// |
| * @license http://www.apache.org/licenses/LICENSE-2.0 Apache License, Version 2.0 |
| */ |
| |
| /** |
| * Caches fetched definitions so they don't have to be read from the original source |
| * for each use. |
| * |
| * The cache is typically used to wrap around another ezcPersistentDefinitionManager |
| * of your choice. |
| * |
| * @version //autogen// |
| * @package PersistentObject |
| */ |
| class ezcPersistentCacheManager extends ezcPersistentDefinitionManager |
| { |
| /** |
| * Holds the manager that fetches definitions. |
| * |
| * @var ezcPersistentDefinitionManager |
| */ |
| private $manager; |
| |
| /** |
| * Holds the persistent object definitions that are currently cached. |
| * |
| * @var array($className=>ezcPersistentObjectDefinition) |
| */ |
| private $cache = array(); |
| |
| /** |
| * Constructs a new definition cache. |
| * |
| * @param ezcPersistentDefinitionManager $manager |
| */ |
| public function __construct( ezcPersistentDefinitionManager $manager ) |
| { |
| $this->manager = $manager; |
| } |
| |
| /** |
| * Returns the definition of the persistent object with the class $class. |
| * |
| * If a definition has been requested already the definition will be served from |
| * the cache. |
| * |
| * @throws ezcPersistentDefinitionNotFoundException if no such definition can be found. |
| * @param string $class |
| * @return ezcPersistentObjectDefinition |
| */ |
| public function fetchDefinition( $class ) |
| { |
| if ( isset( $this->cache[$class] ) ) |
| { |
| return $this->cache[$class]; |
| } |
| |
| $def = $this->manager->fetchDefinition( $class ); |
| |
| // cache it |
| $this->cache[$class] = $def; |
| return $def; |
| } |
| } |
| ?> |