vendor/symfony/dependency-injection/Compiler/ServiceReferenceGraph.php line 77
<?php/** This file is part of the Symfony package.** (c) Fabien Potencier <fabien@symfony.com>** For the full copyright and license information, please view the LICENSE* file that was distributed with this source code.*/namespace Symfony\Component\DependencyInjection\Compiler;use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;use Symfony\Component\DependencyInjection\Reference;/*** This is a directed graph of your services.** This information can be used by your compiler passes instead of collecting* it themselves which improves performance quite a lot.** @author Johannes M. Schmitt <schmittjoh@gmail.com>** @final*/class ServiceReferenceGraph{/*** @var ServiceReferenceGraphNode[]*/private array $nodes = [];public function hasNode(string $id): bool{return isset($this->nodes[$id]);}/*** Gets a node by identifier.** @throws InvalidArgumentException if no node matches the supplied identifier*/public function getNode(string $id): ServiceReferenceGraphNode{if (!isset($this->nodes[$id])) {throw new InvalidArgumentException(sprintf('There is no node with id "%s".', $id));}return $this->nodes[$id];}/*** Returns all nodes.** @return ServiceReferenceGraphNode[]*/public function getNodes(): array{return $this->nodes;}/*** Clears all nodes.*/public function clear(){foreach ($this->nodes as $node) {$node->clear();}$this->nodes = [];}/*** Connects 2 nodes together in the Graph.*/public function connect(?string $sourceId, mixed $sourceValue, ?string $destId, mixed $destValue = null, Reference $reference = null, bool $lazy = false, bool $weak = false, bool $byConstructor = false){if (null === $sourceId || null === $destId) {return;}$sourceNode = $this->createNode($sourceId, $sourceValue);$destNode = $this->createNode($destId, $destValue);$edge = new ServiceReferenceGraphEdge($sourceNode, $destNode, $reference, $lazy, $weak, $byConstructor);$sourceNode->addOutEdge($edge);$destNode->addInEdge($edge);}private function createNode(string $id, mixed $value): ServiceReferenceGraphNode{if (isset($this->nodes[$id]) && $this->nodes[$id]->getValue() === $value) {return $this->nodes[$id];}return $this->nodes[$id] = new ServiceReferenceGraphNode($id, $value);}}