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<?php |
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/** |
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* This file is part of the Drest package. |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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* |
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* @author Lee Davis |
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* @copyright Copyright (c) Lee Davis <@leedavis81> |
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* @link https://github.com/leedavis81/drest/blob/master/LICENSE |
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* @license http://opensource.org/licenses/MIT The MIT X License (MIT) |
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*/ |
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namespace Drest\Mapping; |
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use Doctrine\Common\Cache\Cache; |
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use Drest\DrestException; |
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use Drest\Mapping\Driver\DriverInterface; |
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class MetadataFactory |
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{ |
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/** |
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* Driver attached to this meta data factory |
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* @var \Drest\Mapping\Driver\DriverInterface $driver |
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*/ |
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private $driver; |
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/** |
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* Cache used to prevent metadata reloading |
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* @var \Doctrine\Common\Cache\Cache $cache |
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*/ |
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private $cache; |
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/** |
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* A prefix string to use when interacting with a Doctrine cache object |
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* @var string $cache_prefix |
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*/ |
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private $cache_prefix = '_drest_'; |
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/** |
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* Metadata that has already been loaded by the driver |
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* @var array $loadedMetadata |
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*/ |
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private $loadedMetadata = []; |
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/** |
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* @param DriverInterface $driver |
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*/ |
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public function __construct(DriverInterface $driver) |
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{ |
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$this->driver = $driver; |
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} |
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/** |
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* Set the doctrine cache drive to be user |
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* @param Cache $cache |
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*/ |
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public function setCache(Cache $cache) |
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{ |
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$this->cache = $cache; |
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} |
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/** |
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* Get all class names |
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* @return array class names registered to this driver |
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*/ |
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public function getAllClassNames() |
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{ |
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return $this->driver->getAllClassNames(); |
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} |
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/** |
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* Get metadata for a certain class - loads once and caches |
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* @param string $className |
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* @throws \Drest\DrestException |
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* @return ClassMetaData $metaData |
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*/ |
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public function getMetadataForClass($className) |
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{ |
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if (isset($this->loadedMetadata[$className])) { |
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return $this->loadedMetadata[$className]; |
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} |
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// check the cache |
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if ($this->cache !== null) { |
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$classMetadata = $this->cache->fetch($this->cache_prefix . $className); |
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if ($classMetadata instanceof ClassMetaData) { |
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if ($classMetadata->expired()) { |
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$this->cache->delete($this->cache_prefix . $className); |
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} else { |
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$this->loadedMetadata[$className] = $classMetadata; |
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return $classMetadata; |
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} |
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} |
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} |
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$classMetadata = $this->driver->loadMetadataForClass($className); |
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if ($classMetadata !== null) { |
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$this->loadedMetadata[$className] = $classMetadata; |
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if ($this->cache !== null) { |
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$this->cache->save($this->cache_prefix . $className, $classMetadata); |
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} |
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return $classMetadata; |
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} |
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if (!isset($this->loadedMetadata[$className])) { |
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throw DrestException::unableToLoadMetaDataFromDriver(); |
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} |
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return $this->loadedMetadata[$className]; |
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} |
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} |
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leedavis81 /
drest
