<?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\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 = $container->normalizeId($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 (InvalidArgumentException $e) {
throw new InvalidArgumentException(sprintf('Unable to replace alias "%s" with actual definition "%s".', $definitionId, $targetId), null, $e);
}
if ($definition->isPublic() || $definition->isPrivate()) {
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 = $this->container->normalizeId($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);
}
}