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pma/vendor/symfony/dependency-injection/Compiler/ReplaceAliasByActualDefinitionPass.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\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
+use Symfony\Component\DependencyInjection\Exception\ServiceNotFoundException;
+use Symfony\Component\DependencyInjection\Reference;
+
+/**
+ * Replaces aliases with actual service definitions, effectively removing these
+ * aliases.
+ *
+ * @author Johannes M. Schmitt <schmittjoh@gmail.com>
+ */
+class ReplaceAliasByActualDefinitionPass extends AbstractRecursivePass
+{
+    private $replacements;
+
+    /**
+     * Process the Container to replace aliases with service definitions.
+     *
+     * @throws InvalidArgumentException if the service definition does not exist
+     */
+    public function process(ContainerBuilder $container)
+    {
+        // First collect all alias targets that need to be replaced
+        $seenAliasTargets = [];
+        $replacements = [];
+        foreach ($container->getAliases() as $definitionId => $target) {
+            $targetId = (string) $target;
+            // Special case: leave this target alone
+            if ('service_container' === $targetId) {
+                continue;
+            }
+            // Check if target needs to be replaces
+            if (isset($replacements[$targetId])) {
+                $container->setAlias($definitionId, $replacements[$targetId])->setPublic($target->isPublic())->setPrivate($target->isPrivate());
+            }
+            // No need to process the same target twice
+            if (isset($seenAliasTargets[$targetId])) {
+                continue;
+            }
+            // Process new target
+            $seenAliasTargets[$targetId] = true;
+            try {
+                $definition = $container->getDefinition($targetId);
+            } catch (ServiceNotFoundException $e) {
+                if ('' !== $e->getId() && '@' === $e->getId()[0]) {
+                    throw new ServiceNotFoundException($e->getId(), $e->getSourceId(), null, [substr($e->getId(), 1)]);
+                }
+
+                throw $e;
+            }
+            if ($definition->isPublic()) {
+                continue;
+            }
+            // Remove private definition and schedule for replacement
+            $definition->setPublic(!$target->isPrivate());
+            $definition->setPrivate($target->isPrivate());
+            $container->setDefinition($definitionId, $definition);
+            $container->removeDefinition($targetId);
+            $replacements[$targetId] = $definitionId;
+        }
+        $this->replacements = $replacements;
+
+        parent::process($container);
+        $this->replacements = [];
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function processValue($value, $isRoot = false)
+    {
+        if ($value instanceof Reference && isset($this->replacements[$referenceId = (string) $value])) {
+            // Perform the replacement
+            $newId = $this->replacements[$referenceId];
+            $value = new Reference($newId, $value->getInvalidBehavior());
+            $this->container->log($this, sprintf('Changed reference of service "%s" previously pointing to "%s" to "%s".', $this->currentId, $referenceId, $newId));
+        }
+
+        return parent::processValue($value, $isRoot);
+    }
+}