Chris@0: <?php
Chris@0: 
Chris@0: /*
Chris@0:  * This file is part of the Prophecy.
Chris@0:  * (c) Konstantin Kudryashov <ever.zet@gmail.com>
Chris@0:  *     Marcello Duarte <marcello.duarte@gmail.com>
Chris@0:  *
Chris@0:  * For the full copyright and license information, please view the LICENSE
Chris@0:  * file that was distributed with this source code.
Chris@0:  */
Chris@0: 
Chris@0: namespace Prophecy\Doubler;
Chris@0: 
Chris@0: use ReflectionClass;
Chris@0: 
Chris@0: /**
Chris@0:  * Cached class doubler.
Chris@0:  * Prevents mirroring/creation of the same structure twice.
Chris@0:  *
Chris@0:  * @author Konstantin Kudryashov <ever.zet@gmail.com>
Chris@0:  */
Chris@0: class CachedDoubler extends Doubler
Chris@0: {
Chris@0:     private $classes = array();
Chris@0: 
Chris@0:     /**
Chris@0:      * {@inheritdoc}
Chris@0:      */
Chris@0:     public function registerClassPatch(ClassPatch\ClassPatchInterface $patch)
Chris@0:     {
Chris@0:         $this->classes[] = array();
Chris@0: 
Chris@0:         parent::registerClassPatch($patch);
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * {@inheritdoc}
Chris@0:      */
Chris@0:     protected function createDoubleClass(ReflectionClass $class = null, array $interfaces)
Chris@0:     {
Chris@0:         $classId = $this->generateClassId($class, $interfaces);
Chris@0:         if (isset($this->classes[$classId])) {
Chris@0:             return $this->classes[$classId];
Chris@0:         }
Chris@0: 
Chris@0:         return $this->classes[$classId] = parent::createDoubleClass($class, $interfaces);
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * @param ReflectionClass   $class
Chris@0:      * @param ReflectionClass[] $interfaces
Chris@0:      *
Chris@0:      * @return string
Chris@0:      */
Chris@0:     private function generateClassId(ReflectionClass $class = null, array $interfaces)
Chris@0:     {
Chris@0:         $parts = array();
Chris@0:         if (null !== $class) {
Chris@0:             $parts[] = $class->getName();
Chris@0:         }
Chris@0:         foreach ($interfaces as $interface) {
Chris@0:             $parts[] = $interface->getName();
Chris@0:         }
Chris@0:         sort($parts);
Chris@0: 
Chris@0:         return md5(implode('', $parts));
Chris@0:     }
Chris@0: }