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1<?php
2
3/*
4 * This file is part of the Symfony package.
5 *
6 * (c) Fabien Potencier <fabien@symfony.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 Symfony\Component\PropertyInfo;
13
14use Psr\Cache\CacheItemPoolInterface;
15
16/**
17 * Adds a PSR-6 cache layer on top of an extractor.
18 *
19 * @author K√©vin Dunglas <dunglas@gmail.com>
20 *
21 * @final
22 */
23class PropertyInfoCacheExtractor implements PropertyInfoExtractorInterface, PropertyInitializableExtractorInterface
24{
25    private $propertyInfoExtractor;
26    private $cacheItemPool;
27    private $arrayCache = [];
28
29    public function __construct(PropertyInfoExtractorInterface $propertyInfoExtractor, CacheItemPoolInterface $cacheItemPool)
30    {
31        $this->propertyInfoExtractor = $propertyInfoExtractor;
32        $this->cacheItemPool = $cacheItemPool;
33    }
34
35    /**
36     * {@inheritdoc}
37     */
38    public function isReadable(string $class, string $property, array $context = []): ?bool
39    {
40        return $this->extract('isReadable', [$class, $property, $context]);
41    }
42
43    /**
44     * {@inheritdoc}
45     */
46    public function isWritable(string $class, string $property, array $context = []): ?bool
47    {
48        return $this->extract('isWritable', [$class, $property, $context]);
49    }
50
51    /**
52     * {@inheritdoc}
53     */
54    public function getShortDescription(string $class, string $property, array $context = []): ?string
55    {
56        return $this->extract('getShortDescription', [$class, $property, $context]);
57    }
58
59    /**
60     * {@inheritdoc}
61     */
62    public function getLongDescription(string $class, string $property, array $context = []): ?string
63    {
64        return $this->extract('getLongDescription', [$class, $property, $context]);
65    }
66
67    /**
68     * {@inheritdoc}
69     */
70    public function getProperties(string $class, array $context = []): ?array
71    {
72        return $this->extract('getProperties', [$class, $context]);
73    }
74
75    /**
76     * {@inheritdoc}
77     */
78    public function getTypes(string $class, string $property, array $context = []): ?array
79    {
80        return $this->extract('getTypes', [$class, $property, $context]);
81    }
82
83    /**
84     * {@inheritdoc}
85     */
86    public function isInitializable(string $class, string $property, array $context = []): ?bool
87    {
88        return $this->extract('isInitializable', [$class, $property, $context]);
89    }
90
91    /**
92     * Retrieves the cached data if applicable or delegates to the decorated extractor.
93     *
94     * @return mixed
95     */
96    private function extract(string $method, array $arguments)
97    {
98        try {
99            $serializedArguments = serialize($arguments);
100        } catch (\Exception $exception) {
101            // If arguments are not serializable, skip the cache
102            return $this->propertyInfoExtractor->{$method}(...$arguments);
103        }
104
105        // Calling rawurlencode escapes special characters not allowed in PSR-6's keys
106        $key = rawurlencode($method.'.'.$serializedArguments);
107
108        if (\array_key_exists($key, $this->arrayCache)) {
109            return $this->arrayCache[$key];
110        }
111
112        $item = $this->cacheItemPool->getItem($key);
113
114        if ($item->isHit()) {
115            return $this->arrayCache[$key] = $item->get();
116        }
117
118        $value = $this->propertyInfoExtractor->{$method}(...$arguments);
119        $item->set($value);
120        $this->cacheItemPool->save($item);
121
122        return $this->arrayCache[$key] = $value;
123    }
124}