395 lines
13 KiB
PHP
395 lines
13 KiB
PHP
<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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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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namespace Symfony\Component\DependencyInjection;
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use Symfony\Component\DependencyInjection\Argument\RewindableGenerator;
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use Symfony\Component\DependencyInjection\Argument\ServiceLocator as ArgumentServiceLocator;
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use Symfony\Component\DependencyInjection\Exception\EnvNotFoundException;
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use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
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use Symfony\Component\DependencyInjection\Exception\ParameterCircularReferenceException;
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use Symfony\Component\DependencyInjection\Exception\ParameterNotFoundException;
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use Symfony\Component\DependencyInjection\Exception\RuntimeException;
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use Symfony\Component\DependencyInjection\Exception\ServiceCircularReferenceException;
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use Symfony\Component\DependencyInjection\Exception\ServiceNotFoundException;
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use Symfony\Component\DependencyInjection\ParameterBag\EnvPlaceholderParameterBag;
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use Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag;
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use Symfony\Component\DependencyInjection\ParameterBag\ParameterBagInterface;
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use Symfony\Contracts\Service\ResetInterface;
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// Help opcache.preload discover always-needed symbols
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class_exists(RewindableGenerator::class);
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class_exists(ArgumentServiceLocator::class);
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/**
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* Container is a dependency injection container.
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*
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* It gives access to object instances (services).
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* Services and parameters are simple key/pair stores.
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* The container can have four possible behaviors when a service
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* does not exist (or is not initialized for the last case):
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*
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* * EXCEPTION_ON_INVALID_REFERENCE: Throws an exception at compilation time (the default)
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* * NULL_ON_INVALID_REFERENCE: Returns null
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* * IGNORE_ON_INVALID_REFERENCE: Ignores the wrapping command asking for the reference
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* (for instance, ignore a setter if the service does not exist)
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* * IGNORE_ON_UNINITIALIZED_REFERENCE: Ignores/returns null for uninitialized services or invalid references
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* * RUNTIME_EXCEPTION_ON_INVALID_REFERENCE: Throws an exception at runtime
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*
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* @author Fabien Potencier <fabien@symfony.com>
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* @author Johannes M. Schmitt <schmittjoh@gmail.com>
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*/
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class Container implements ContainerInterface, ResetInterface
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{
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protected $parameterBag;
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protected $services = [];
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protected $privates = [];
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protected $fileMap = [];
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protected $methodMap = [];
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protected $factories = [];
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protected $aliases = [];
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protected $loading = [];
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protected $resolving = [];
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protected $syntheticIds = [];
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private array $envCache = [];
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private bool $compiled = false;
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private \Closure $getEnv;
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public function __construct(ParameterBagInterface $parameterBag = null)
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{
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$this->parameterBag = $parameterBag ?? new EnvPlaceholderParameterBag();
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}
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/**
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* Compiles the container.
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*
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* This method does two things:
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*
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* * Parameter values are resolved;
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* * The parameter bag is frozen.
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*/
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public function compile()
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{
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$this->parameterBag->resolve();
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$this->parameterBag = new FrozenParameterBag($this->parameterBag->all());
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$this->compiled = true;
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}
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/**
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* Returns true if the container is compiled.
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*/
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public function isCompiled(): bool
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{
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return $this->compiled;
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}
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/**
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* Gets the service container parameter bag.
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*/
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public function getParameterBag(): ParameterBagInterface
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{
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return $this->parameterBag;
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}
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/**
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* Gets a parameter.
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*
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* @return array|bool|string|int|float|\UnitEnum|null
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*
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* @throws ParameterNotFoundException if the parameter is not defined
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*/
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public function getParameter(string $name)
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{
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return $this->parameterBag->get($name);
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}
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public function hasParameter(string $name): bool
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{
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return $this->parameterBag->has($name);
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}
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public function setParameter(string $name, array|bool|string|int|float|\UnitEnum|null $value)
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{
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$this->parameterBag->set($name, $value);
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}
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/**
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* Sets a service.
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*
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* Setting a synthetic service to null resets it: has() returns false and get()
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* behaves in the same way as if the service was never created.
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*/
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public function set(string $id, ?object $service)
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{
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// Runs the internal initializer; used by the dumped container to include always-needed files
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if (isset($this->privates['service_container']) && $this->privates['service_container'] instanceof \Closure) {
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$initialize = $this->privates['service_container'];
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unset($this->privates['service_container']);
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$initialize();
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}
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if ('service_container' === $id) {
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throw new InvalidArgumentException('You cannot set service "service_container".');
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}
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if (!(isset($this->fileMap[$id]) || isset($this->methodMap[$id]))) {
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if (isset($this->syntheticIds[$id]) || !isset($this->getRemovedIds()[$id])) {
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// no-op
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} elseif (null === $service) {
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throw new InvalidArgumentException(sprintf('The "%s" service is private, you cannot unset it.', $id));
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} else {
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throw new InvalidArgumentException(sprintf('The "%s" service is private, you cannot replace it.', $id));
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}
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} elseif (isset($this->services[$id])) {
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throw new InvalidArgumentException(sprintf('The "%s" service is already initialized, you cannot replace it.', $id));
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}
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if (isset($this->aliases[$id])) {
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unset($this->aliases[$id]);
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}
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if (null === $service) {
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unset($this->services[$id]);
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return;
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}
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$this->services[$id] = $service;
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}
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public function has(string $id): bool
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{
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if (isset($this->aliases[$id])) {
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$id = $this->aliases[$id];
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}
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if (isset($this->services[$id])) {
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return true;
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}
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if ('service_container' === $id) {
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return true;
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}
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return isset($this->fileMap[$id]) || isset($this->methodMap[$id]);
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}
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/**
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* Gets a service.
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*
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* @throws ServiceCircularReferenceException When a circular reference is detected
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* @throws ServiceNotFoundException When the service is not defined
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* @throws \Exception if an exception has been thrown when the service has been resolved
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*
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* @see Reference
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*/
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public function get(string $id, int $invalidBehavior = self::EXCEPTION_ON_INVALID_REFERENCE): ?object
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{
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return $this->services[$id]
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?? $this->services[$id = $this->aliases[$id] ?? $id]
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?? ('service_container' === $id ? $this : ($this->factories[$id] ?? $this->make(...))($id, $invalidBehavior));
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}
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/**
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* Creates a service.
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*
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* As a separate method to allow "get()" to use the really fast `??` operator.
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*/
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private function make(string $id, int $invalidBehavior)
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{
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if (isset($this->loading[$id])) {
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throw new ServiceCircularReferenceException($id, array_merge(array_keys($this->loading), [$id]));
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}
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$this->loading[$id] = true;
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try {
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if (isset($this->fileMap[$id])) {
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return /* self::IGNORE_ON_UNINITIALIZED_REFERENCE */ 4 === $invalidBehavior ? null : $this->load($this->fileMap[$id]);
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} elseif (isset($this->methodMap[$id])) {
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return /* self::IGNORE_ON_UNINITIALIZED_REFERENCE */ 4 === $invalidBehavior ? null : $this->{$this->methodMap[$id]}();
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}
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} catch (\Exception $e) {
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unset($this->services[$id]);
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throw $e;
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} finally {
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unset($this->loading[$id]);
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}
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if (self::EXCEPTION_ON_INVALID_REFERENCE === $invalidBehavior) {
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if (!$id) {
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throw new ServiceNotFoundException($id);
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}
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if (isset($this->syntheticIds[$id])) {
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throw new ServiceNotFoundException($id, null, null, [], sprintf('The "%s" service is synthetic, it needs to be set at boot time before it can be used.', $id));
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}
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if (isset($this->getRemovedIds()[$id])) {
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throw new ServiceNotFoundException($id, null, null, [], sprintf('The "%s" service or alias has been removed or inlined when the container was compiled. You should either make it public, or stop using the container directly and use dependency injection instead.', $id));
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}
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$alternatives = [];
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foreach ($this->getServiceIds() as $knownId) {
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if ('' === $knownId || '.' === $knownId[0]) {
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continue;
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}
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$lev = levenshtein($id, $knownId);
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if ($lev <= \strlen($id) / 3 || str_contains($knownId, $id)) {
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$alternatives[] = $knownId;
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}
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}
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throw new ServiceNotFoundException($id, null, null, $alternatives);
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}
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return null;
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}
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/**
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* Returns true if the given service has actually been initialized.
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*/
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public function initialized(string $id): bool
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{
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if (isset($this->aliases[$id])) {
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$id = $this->aliases[$id];
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}
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if ('service_container' === $id) {
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return false;
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}
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return isset($this->services[$id]);
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}
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public function reset()
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{
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$services = $this->services + $this->privates;
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$this->services = $this->factories = $this->privates = [];
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foreach ($services as $service) {
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try {
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if ($service instanceof ResetInterface) {
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$service->reset();
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}
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} catch (\Throwable) {
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continue;
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}
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}
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}
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/**
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* Gets all service ids.
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*
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* @return string[]
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*/
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public function getServiceIds(): array
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{
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return array_map('strval', array_unique(array_merge(['service_container'], array_keys($this->fileMap), array_keys($this->methodMap), array_keys($this->aliases), array_keys($this->services))));
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}
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/**
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* Gets service ids that existed at compile time.
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*/
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public function getRemovedIds(): array
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{
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return [];
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}
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/**
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* Camelizes a string.
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*/
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public static function camelize(string $id): string
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{
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return strtr(ucwords(strtr($id, ['_' => ' ', '.' => '_ ', '\\' => '_ '])), [' ' => '']);
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}
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/**
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* A string to underscore.
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*/
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public static function underscore(string $id): string
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{
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return strtolower(preg_replace(['/([A-Z]+)([A-Z][a-z])/', '/([a-z\d])([A-Z])/'], ['\\1_\\2', '\\1_\\2'], str_replace('_', '.', $id)));
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}
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/**
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* Creates a service by requiring its factory file.
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*/
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protected function load(string $file)
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{
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return require $file;
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}
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/**
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* Fetches a variable from the environment.
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*
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* @throws EnvNotFoundException When the environment variable is not found and has no default value
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*/
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protected function getEnv(string $name): mixed
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{
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if (isset($this->resolving[$envName = "env($name)"])) {
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throw new ParameterCircularReferenceException(array_keys($this->resolving));
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}
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if (isset($this->envCache[$name]) || \array_key_exists($name, $this->envCache)) {
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return $this->envCache[$name];
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}
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if (!$this->has($id = 'container.env_var_processors_locator')) {
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$this->set($id, new ServiceLocator([]));
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}
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$this->getEnv ??= $this->getEnv(...);
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$processors = $this->get($id);
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if (false !== $i = strpos($name, ':')) {
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$prefix = substr($name, 0, $i);
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$localName = substr($name, 1 + $i);
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} else {
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$prefix = 'string';
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$localName = $name;
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}
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$processor = $processors->has($prefix) ? $processors->get($prefix) : new EnvVarProcessor($this);
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$this->resolving[$envName] = true;
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try {
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return $this->envCache[$name] = $processor->getEnv($prefix, $localName, $this->getEnv);
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} finally {
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unset($this->resolving[$envName]);
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}
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}
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/**
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* @internal
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*/
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final protected function getService(string|false $registry, string $id, ?string $method, string|bool $load): mixed
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{
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if ('service_container' === $id) {
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return $this;
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}
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if (\is_string($load)) {
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throw new RuntimeException($load);
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}
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if (null === $method) {
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return false !== $registry ? $this->{$registry}[$id] ?? null : null;
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}
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if (false !== $registry) {
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return $this->{$registry}[$id] ??= $load ? $this->load($method) : $this->{$method}();
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}
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if (!$load) {
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return $this->{$method}();
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}
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return ($factory = $this->factories[$id] ?? $this->factories['service_container'][$id] ?? null) ? $factory() : $this->load($method);
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}
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private function __clone()
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{
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}
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}
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