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<?php |
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declare(strict_types=1); |
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namespace Yiisoft\Di; |
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use Closure; |
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use InvalidArgumentException; |
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use Psr\Container\ContainerInterface; |
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use Yiisoft\Definitions\ArrayDefinition; |
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use Yiisoft\Definitions\Exception\CircularReferenceException; |
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use Yiisoft\Definitions\Exception\InvalidConfigException; |
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use Yiisoft\Definitions\Exception\NotInstantiableException; |
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use Yiisoft\Definitions\Helpers\DefinitionValidator; |
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use Yiisoft\Definitions\DefinitionStorage; |
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use function array_key_exists; |
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use function array_keys; |
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use function get_class; |
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use function gettype; |
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use function implode; |
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use function in_array; |
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use function is_array; |
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use function is_object; |
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use function is_string; |
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/** |
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* Container implements a [dependency injection](http://en.wikipedia.org/wiki/Dependency_injection) container. |
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*/ |
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final class Container implements ContainerInterface |
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{ |
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private const META_TAGS = 'tags'; |
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private const META_RESET = 'reset'; |
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private const ALLOWED_META = [self::META_TAGS, self::META_RESET]; |
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/** |
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* @var DefinitionStorage Storage of object definitions. |
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*/ |
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private DefinitionStorage $definitions; |
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/** |
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* @var array Used to collect IDs of objects instantiated during build |
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* to detect circular references. |
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*/ |
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private array $building = []; |
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/** |
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* @var bool $validate If definitions should be validated. |
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*/ |
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private bool $validate; |
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/** |
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* @var object[] |
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*/ |
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private array $instances = []; |
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private CompositeContainer $delegates; |
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/** |
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* @var array Tagged service IDs. The structure is `['tagID' => ['service1', 'service2']]`. |
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*/ |
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private array $tags; |
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private bool $addResetters = true; |
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private array $resetters = []; |
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/** |
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* Container constructor. |
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* |
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* @param ContainerConfigInterface $config Container configuration. |
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* |
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* @throws InvalidConfigException |
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* @psalm-suppress PropertyNotSetInConstructor |
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*/ |
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public function __construct(ContainerConfigInterface $config) |
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{ |
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$this->definitions = new DefinitionStorage( |
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[ContainerInterface::class => $this], |
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$config->useStrictMode() |
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); |
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$this->tags = $config->getTags(); |
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$this->validate = $config->shouldValidate(); |
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$this->setMultiple($config->getDefinitions()); |
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$this->addProviders($config->getProviders()); |
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$this->setDelegates($config->getDelegates()); |
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if ($this->addResetters) { |
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$this->definitions->set(StateResetter::class, StateResetter::class); |
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} |
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} |
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/** |
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* Returns a value indicating whether the container has the definition of the specified name. |
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* |
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* @param string $id Class name, interface name or alias name. |
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* |
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* @return bool Whether the container is able to provide instance of class specified. |
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* |
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* @see set() |
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*/ |
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public function has($id): bool |
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{ |
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/** @psalm-suppress DocblockTypeContradiction */ |
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if (!is_string($id)) { |
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return false; |
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} |
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if ($this->isTagAlias($id)) { |
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$tag = substr($id, 4); |
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return isset($this->tags[$tag]); |
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} |
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try { |
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return $this->definitions->has($id); |
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3 |
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} catch (CircularReferenceException $e) { |
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return true; |
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} |
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} |
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/** |
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* Returns an instance by either interface name or alias. |
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* |
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* Same instance of the class will be returned each time this method is called. |
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* |
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* @param string $id The interface or an alias name that was previously registered. |
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* |
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* @throws CircularReferenceException |
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* @throws InvalidConfigException |
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* @throws NotFoundException |
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* @throws NotInstantiableException |
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* |
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* @return mixed|object An instance of the requested interface. |
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* |
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* @psalm-template T |
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* @psalm-param string|class-string<T> $id |
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* @psalm-return ($id is class-string ? T : mixed) |
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*/ |
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public function get($id) |
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{ |
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/** @psalm-suppress TypeDoesNotContainType */ |
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if (!is_string($id)) { |
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throw new InvalidArgumentException("Id must be a string, {$this->getVariableType($id)} given."); |
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} |
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if (!array_key_exists($id, $this->instances)) { |
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try { |
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$this->instances[$id] = $this->build($id); |
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} catch (NotFoundException $e) { |
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if (!$this->delegates->has($id)) { |
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throw $e; |
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} |
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return $this->delegates->get($id); |
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} |
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} |
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if ($this->addResetters && $id === StateResetter::class) { |
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$resetters = []; |
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foreach ($this->resetters as $serviceId => $callback) { |
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if (isset($this->instances[$serviceId])) { |
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$resetters[$serviceId] = $callback; |
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} |
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} |
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if ($this->delegates->has(StateResetter::class)) { |
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$resetters[] = $this->delegates->get(StateResetter::class); |
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} |
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$this->instances[$id]->setResetters($resetters); |
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} |
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return $this->instances[$id]; |
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} |
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/** |
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* Sets a definition to the container. Definition may be defined multiple ways. |
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* |
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* @param string $id ID to set definition for. |
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* @param mixed $definition Definition to set. |
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* |
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* @throws InvalidConfigException |
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* |
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* @see DefinitionNormalizer::normalize() |
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*/ |
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private function set(string $id, $definition): void |
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{ |
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[$definition, $meta] = DefinitionParser::parse($definition); |
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if ($this->validate) { |
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$this->validateDefinition($definition, $id); |
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$this->validateMeta($meta); |
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} |
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if (isset($meta[self::META_TAGS])) { |
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if ($this->validate) { |
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$this->validateTags($meta[self::META_TAGS]); |
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} |
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$this->setTags($id, $meta[self::META_TAGS]); |
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} |
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if (isset($meta[self::META_RESET])) { |
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$this->setResetter($id, $meta[self::META_RESET]); |
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} |
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unset($this->instances[$id]); |
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$this->definitions->set($id, $definition); |
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if ($id === StateResetter::class) { |
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$this->addResetters = false; |
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} |
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} |
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/** |
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* Sets multiple definitions at once. |
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* |
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* @param array $config Definitions indexed by their IDs. |
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* |
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* @throws InvalidConfigException |
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*/ |
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private function setMultiple(array $config): void |
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{ |
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foreach ($config as $id => $definition) { |
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if ($this->validate && !is_string($id)) { |
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throw new InvalidConfigException(sprintf('Key must be a string. %s given.', $this->getVariableType($id))); |
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} |
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$this->set($id, $definition); |
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} |
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} |
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/** |
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* Set container delegates. |
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* |
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* Each delegate must is a callable in format "function (ContainerInterface $container): ContainerInterface". |
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* The container instance returned is used in case a service can not be found in primary container. |
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* |
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* @param array $delegates |
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* |
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* @throws InvalidConfigException |
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*/ |
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107 |
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private function setDelegates(array $delegates): void |
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{ |
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$this->delegates = new CompositeContainer(); |
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107 |
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foreach ($delegates as $delegate) { |
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if (!$delegate instanceof Closure) { |
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throw new InvalidConfigException( |
242
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1 |
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'Delegate must be callable in format "function (ContainerInterface $container): ContainerInterface".' |
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); |
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} |
245
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246
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3 |
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$delegate = $delegate($this); |
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248
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3 |
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if (!$delegate instanceof ContainerInterface) { |
249
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1 |
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throw new InvalidConfigException( |
250
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1 |
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'Delegate callable must return an object that implements ContainerInterface.' |
251
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); |
252
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} |
253
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254
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2 |
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$this->delegates->attach($delegate); |
255
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} |
256
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105 |
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$this->definitions->setDelegateContainer($this->delegates); |
257
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105 |
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} |
258
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259
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/** |
260
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* @param mixed $definition Definition to validate. |
261
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* @param string|null $id ID of the definition to validate. |
262
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* |
263
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* @throws InvalidConfigException |
264
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*/ |
265
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100 |
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private function validateDefinition($definition, ?string $id = null): void |
266
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{ |
267
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100 |
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if (is_array($definition) && isset($definition[DefinitionParser::IS_PREPARED_ARRAY_DEFINITION_DATA])) { |
268
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42 |
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$class = $definition['class']; |
269
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42 |
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$constructorArguments = $definition['__construct()']; |
270
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42 |
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$methodsAndProperties = $definition['methodsAndProperties']; |
271
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42 |
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$definition = array_merge( |
272
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42 |
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$class === null ? [] : [ArrayDefinition::CLASS_NAME => $class], |
273
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42 |
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[ArrayDefinition::CONSTRUCTOR => $constructorArguments], |
274
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$methodsAndProperties, |
275
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); |
276
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} |
277
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278
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100 |
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if ($definition instanceof ExtensibleService) { |
279
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1 |
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throw new InvalidConfigException('Invalid definition. ExtensibleService is only allowed in provider extensions.'); |
280
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} |
281
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282
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99 |
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DefinitionValidator::validate($definition, $id); |
283
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98 |
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} |
284
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285
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/** |
286
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* @throws InvalidConfigException |
287
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*/ |
288
|
98 |
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private function validateMeta(array $meta): void |
289
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{ |
290
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98 |
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foreach ($meta as $key => $_value) { |
291
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20 |
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if (!in_array($key, self::ALLOWED_META, true)) { |
292
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3 |
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throw new InvalidConfigException( |
293
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3 |
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sprintf( |
294
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3 |
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'Invalid definition: metadata "%s" is not allowed. Did you mean "%s()" or "$%s"?', |
295
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$key, |
296
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$key, |
297
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$key, |
298
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) |
299
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); |
300
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} |
301
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} |
302
|
95 |
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} |
303
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304
|
10 |
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private function validateTags(array $tags): void |
305
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{ |
306
|
10 |
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foreach ($tags as $tag) { |
307
|
10 |
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if (!is_string($tag)) { |
308
|
1 |
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throw new InvalidConfigException('Invalid tag. Expected a string, got ' . var_export($tag, true) . '.'); |
309
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} |
310
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} |
311
|
9 |
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} |
312
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313
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9 |
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private function setTags(string $id, array $tags): void |
314
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{ |
315
|
9 |
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foreach ($tags as $tag) { |
316
|
9 |
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if (!isset($this->tags[$tag]) || !in_array($id, $this->tags[$tag], true)) { |
317
|
9 |
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$this->tags[$tag][] = $id; |
318
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} |
319
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} |
320
|
9 |
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} |
321
|
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|
322
|
6 |
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private function setResetter(string $id, Closure $resetter): void |
323
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|
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{ |
324
|
6 |
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$this->resetters[$id] = $resetter; |
325
|
6 |
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} |
326
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|
327
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/** |
328
|
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* Creates new instance by either interface name or alias. |
329
|
|
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* |
330
|
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* @param string $id The interface or an alias name that was previously registered. |
331
|
|
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* |
332
|
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* @throws CircularReferenceException |
333
|
|
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* @throws InvalidConfigException |
334
|
|
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* @throws NotFoundException |
335
|
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* |
336
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* @return mixed|object New built instance of the specified class. |
337
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* |
338
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* @internal |
339
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*/ |
340
|
92 |
|
private function build(string $id) |
341
|
|
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{ |
342
|
92 |
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if ($this->isTagAlias($id)) { |
343
|
10 |
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return $this->getTaggedServices($id); |
344
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} |
345
|
|
|
|
346
|
91 |
|
if (isset($this->building[$id])) { |
347
|
82 |
|
if ($id === ContainerInterface::class) { |
348
|
82 |
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return $this; |
349
|
|
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} |
350
|
4 |
|
throw new CircularReferenceException(sprintf( |
351
|
4 |
|
'Circular reference to "%s" detected while building: %s.', |
352
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|
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$id, |
353
|
4 |
|
implode(', ', array_keys($this->building)) |
354
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)); |
355
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|
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} |
356
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|
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|
357
|
91 |
|
$this->building[$id] = 1; |
358
|
|
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try { |
359
|
91 |
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$object = $this->buildInternal($id); |
360
|
82 |
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} finally { |
361
|
91 |
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unset($this->building[$id]); |
362
|
|
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} |
363
|
|
|
|
364
|
82 |
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return $object; |
365
|
|
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} |
366
|
|
|
|
367
|
103 |
|
private function isTagAlias(string $id): bool |
368
|
|
|
{ |
369
|
103 |
|
return strncmp($id, 'tag@', 4) === 0; |
370
|
|
|
} |
371
|
|
|
|
372
|
10 |
|
private function getTaggedServices(string $tagAlias): array |
373
|
|
|
{ |
374
|
10 |
|
$tag = substr($tagAlias, 4); |
375
|
10 |
|
$services = []; |
376
|
10 |
|
if (isset($this->tags[$tag])) { |
377
|
9 |
|
foreach ($this->tags[$tag] as $service) { |
378
|
9 |
|
$services[] = $this->get($service); |
379
|
|
|
} |
380
|
|
|
} |
381
|
|
|
|
382
|
10 |
|
return $services; |
383
|
|
|
} |
384
|
|
|
|
385
|
|
|
/** |
386
|
|
|
* @param string $id |
387
|
|
|
* |
388
|
|
|
* @throws InvalidConfigException |
389
|
|
|
* @throws NotFoundException |
390
|
|
|
* |
391
|
|
|
* @return mixed|object |
392
|
|
|
*/ |
393
|
91 |
|
private function buildInternal(string $id) |
394
|
|
|
{ |
395
|
91 |
|
if ($this->definitions->has($id)) { |
396
|
82 |
|
$definition = DefinitionNormalizer::normalize($this->definitions->get($id), $id); |
397
|
|
|
|
398
|
82 |
|
return $definition->resolve($this->get(ContainerInterface::class)); |
399
|
|
|
} |
400
|
|
|
|
401
|
9 |
|
throw new NotFoundException($id, $this->definitions->getBuildStack()); |
402
|
|
|
} |
403
|
|
|
|
404
|
111 |
|
private function addProviders(array $providers): void |
405
|
|
|
{ |
406
|
111 |
|
$extensions = []; |
407
|
111 |
|
foreach ($providers as $provider) { |
408
|
11 |
|
$providerInstance = $this->buildProvider($provider); |
409
|
9 |
|
$extensions[] = $providerInstance->getExtensions(); |
410
|
9 |
|
$this->addProviderDefinitions($providerInstance); |
411
|
|
|
} |
412
|
|
|
|
413
|
109 |
|
foreach ($extensions as $providerExtensions) { |
414
|
9 |
|
foreach ($providerExtensions as $id => $extension) { |
415
|
6 |
|
if ($id === ContainerInterface::class) { |
416
|
1 |
|
throw new InvalidConfigException('ContainerInterface extensions are not allowed.'); |
417
|
|
|
} |
418
|
|
|
|
419
|
5 |
|
if (!$this->definitions->has($id)) { |
420
|
1 |
|
throw new InvalidConfigException("Extended service \"$id\" doesn't exist."); |
421
|
|
|
} |
422
|
|
|
|
423
|
5 |
|
$definition = $this->definitions->get($id); |
424
|
5 |
|
if (!$definition instanceof ExtensibleService) { |
425
|
5 |
|
$definition = new ExtensibleService($definition); |
426
|
5 |
|
$this->definitions->set($id, $definition); |
427
|
|
|
} |
428
|
|
|
|
429
|
5 |
|
$definition->addExtension($extension); |
430
|
|
|
} |
431
|
|
|
} |
432
|
107 |
|
} |
433
|
|
|
|
434
|
|
|
/** |
435
|
|
|
* Adds service provider definitions to the container. |
436
|
|
|
* |
437
|
|
|
* @param ServiceProviderInterface $provider Provider to get definitions from. |
438
|
|
|
* |
439
|
|
|
* @throws InvalidConfigException |
440
|
|
|
* @throws NotInstantiableException |
441
|
|
|
*/ |
442
|
9 |
|
private function addProviderDefinitions(ServiceProviderInterface $provider): void |
443
|
|
|
{ |
444
|
9 |
|
$definitions = $provider->getDefinitions(); |
445
|
9 |
|
$this->setMultiple($definitions); |
446
|
9 |
|
} |
447
|
|
|
|
448
|
|
|
/** |
449
|
|
|
* Builds service provider by definition. |
450
|
|
|
* |
451
|
|
|
* @param mixed $provider Class name or instance of provider. |
452
|
|
|
* |
453
|
|
|
* @throws InvalidConfigException If provider argument is not valid. |
454
|
|
|
* |
455
|
|
|
* @return ServiceProviderInterface Instance of service provider. |
456
|
|
|
* |
457
|
|
|
* @psalm-suppress MoreSpecificReturnType |
458
|
|
|
*/ |
459
|
11 |
|
private function buildProvider($provider): ServiceProviderInterface |
460
|
|
|
{ |
461
|
11 |
|
if ($this->validate && !(is_string($provider) || $provider instanceof ServiceProviderInterface)) { |
462
|
1 |
|
throw new InvalidConfigException( |
463
|
1 |
|
sprintf( |
464
|
1 |
|
'Service provider should be a class name or an instance of %s. %s given.', |
465
|
1 |
|
ServiceProviderInterface::class, |
466
|
1 |
|
$this->getVariableType($provider) |
467
|
|
|
) |
468
|
|
|
); |
469
|
|
|
} |
470
|
|
|
|
471
|
10 |
|
$providerInstance = is_object($provider) ? $provider : new $provider(); |
472
|
10 |
|
if (!$providerInstance instanceof ServiceProviderInterface) { |
473
|
1 |
|
throw new InvalidConfigException( |
474
|
1 |
|
sprintf( |
475
|
1 |
|
'Service provider should be an instance of %s. %s given.', |
476
|
1 |
|
ServiceProviderInterface::class, |
477
|
1 |
|
$this->getVariableType($providerInstance) |
478
|
|
|
) |
479
|
|
|
); |
480
|
|
|
} |
481
|
|
|
|
482
|
|
|
/** |
483
|
|
|
* @psalm-suppress LessSpecificReturnStatement |
484
|
|
|
*/ |
485
|
9 |
|
return $providerInstance; |
486
|
|
|
} |
487
|
|
|
|
488
|
|
|
/** |
489
|
|
|
* @param mixed $variable |
490
|
|
|
*/ |
491
|
4 |
|
private function getVariableType($variable): string |
492
|
|
|
{ |
493
|
4 |
|
return is_object($variable) ? get_class($variable) : gettype($variable); |
494
|
|
|
} |
495
|
|
|
} |
496
|
|
|
|