depicter / vendor / symfony / service-contracts / ServiceLocatorTrait.php

ServiceLocatorTrait.php in Depicter — Popup & Slider Builder 1.5.2, at vendor/symfony/service-contracts/ServiceLocatorTrait.php

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1	<?php
2
3	/*
4	* This file is part of the Symfony package.
5	*
6	* (c) Fabien Potencier <[email protected]>
7	*
8	* For the full copyright and license information, please view the LICENSE
9	* file that was distributed with this source code.
10	*/
11
12	namespace Symfony\Contracts\Service;
13
14	use Psr\Container\ContainerExceptionInterface;
15	use Psr\Container\NotFoundExceptionInterface;
16
17	// Help opcache.preload discover always-needed symbols
18	class_exists(ContainerExceptionInterface::class);
19	class_exists(NotFoundExceptionInterface::class);
20
21	/**
22	* A trait to help implement ServiceProviderInterface.
23	*
24	* @author Robin Chalas <[email protected]>
25	* @author Nicolas Grekas <[email protected]>
26	*/
27	trait ServiceLocatorTrait
28	{
29	private $factories;
30	private $loading = [];
31	private $providedTypes;
32
33	/**
34	* @param callable[] $factories
35	*/
36	public function __construct(array $factories)
37	{
38	$this->factories = $factories;
39	}
40
41	/**
42	* {@inheritdoc}
43	*
44	* @return bool
45	*/
46	public function has(string $id)
47	{
48	return isset($this->factories[$id]);
49	}
50
51	/**
52	* {@inheritdoc}
53	*
54	* @return mixed
55	*/
56	public function get(string $id)
57	{
58	if (!isset($this->factories[$id])) {
59	throw $this->createNotFoundException($id);
60	}
61
62	if (isset($this->loading[$id])) {
63	$ids = array_values($this->loading);
64	$ids = \array_slice($this->loading, array_search($id, $ids));
65	$ids[] = $id;
66
67	throw $this->createCircularReferenceException($id, $ids);
68	}
69
70	$this->loading[$id] = $id;
71	try {
72	return $this->factories[$id]($this);
73	} finally {
74	unset($this->loading[$id]);
75	}
76	}
77
78	/**
79	* {@inheritdoc}
80	*/
81	public function getProvidedServices(): array
82	{
83	if (null === $this->providedTypes) {
84	$this->providedTypes = [];
85
86	foreach ($this->factories as $name => $factory) {
87	if (!\is_callable($factory)) {
88	$this->providedTypes[$name] = '?';
89	} else {
90	$type = (new \ReflectionFunction($factory))->getReturnType();
91
92	$this->providedTypes[$name] = $type ? ($type->allowsNull() ? '?' : '').($type instanceof \ReflectionNamedType ? $type->getName() : $type) : '?';
93	}
94	}
95	}
96
97	return $this->providedTypes;
98	}
99
100	private function createNotFoundException(string $id): NotFoundExceptionInterface
101	{
102	if (!$alternatives = array_keys($this->factories)) {
103	$message = 'is empty...';
104	} else {
105	$last = array_pop($alternatives);
106	if ($alternatives) {
107	$message = sprintf('only knows about the "%s" and "%s" services.', implode('", "', $alternatives), $last);
108	} else {
109	$message = sprintf('only knows about the "%s" service.', $last);
110	}
111	}
112
113	if ($this->loading) {
114	$message = sprintf('The service "%s" has a dependency on a non-existent service "%s". This locator %s', end($this->loading), $id, $message);
115	} else {
116	$message = sprintf('Service "%s" not found: the current service locator %s', $id, $message);
117	}
118
119	return new class($message) extends \InvalidArgumentException implements NotFoundExceptionInterface {
120	};
121	}
122
123	private function createCircularReferenceException(string $id, array $path): ContainerExceptionInterface
124	{
125	return new class(sprintf('Circular reference detected for service "%s", path: "%s".', $id, implode(' -> ', $path))) extends \RuntimeException implements ContainerExceptionInterface {
126	};
127	}
128	}
129