1<?php
2
3/*
4 * This file is part of the Prophecy.
5 * (c) Konstantin Kudryashov <ever.zet@gmail.com>
6 *     Marcello Duarte <marcello.duarte@gmail.com>
7 *
8 * For the full copyright and license information, please view the LICENSE
9 * file that was distributed with this source code.
10 */
11
12namespace Prophecy\Doubler;
13
14use ReflectionClass;
15
16/**
17 * Cached class doubler.
18 * Prevents mirroring/creation of the same structure twice.
19 *
20 * @author Konstantin Kudryashov <ever.zet@gmail.com>
21 */
22class CachedDoubler extends Doubler
23{
24    private $classes = array();
25
26    /**
27     * {@inheritdoc}
28     */
29    public function registerClassPatch(ClassPatch\ClassPatchInterface $patch)
30    {
31        $this->classes[] = array();
32
33        parent::registerClassPatch($patch);
34    }
35
36    /**
37     * {@inheritdoc}
38     */
39    protected function createDoubleClass(ReflectionClass $class = null, array $interfaces)
40    {
41        $classId = $this->generateClassId($class, $interfaces);
42        if (isset($this->classes[$classId])) {
43            return $this->classes[$classId];
44        }
45
46        return $this->classes[$classId] = parent::createDoubleClass($class, $interfaces);
47    }
48
49    /**
50     * @param ReflectionClass   $class
51     * @param ReflectionClass[] $interfaces
52     *
53     * @return string
54     */
55    private function generateClassId(ReflectionClass $class = null, array $interfaces)
56    {
57        $parts = array();
58        if (null !== $class) {
59            $parts[] = $class->getName();
60        }
61        foreach ($interfaces as $interface) {
62            $parts[] = $interface->getName();
63        }
64        sort($parts);
65
66        return md5(implode('', $parts));
67    }
68}
69