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admin/phpMyAdmin/vendor/symfony/dependency-injection/Compiler/ServiceReferenceGraph.php

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+<?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 $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, $sourceValue, ?string $destId, $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, $value): ServiceReferenceGraphNode
+    {
+        if (isset($this->nodes[$id]) && $this->nodes[$id]->getValue() === $value) {
+            return $this->nodes[$id];
+        }
+
+        return $this->nodes[$id] = new ServiceReferenceGraphNode($id, $value);
+    }
+}