Classes List

Symfony\Component\DependencyInjection\Compiler\ReplaceAliasByActualDefinitionPass

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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\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 = array();
        $replacements = array();
        foreach ($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 = array();
    }

    /** * {@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());
            $this->container->log($thissprintf('Changed reference of service "%s" previously pointing to "%s" to "%s".'$this->currentId$referenceId$newId));
        }

        return parent::processValue($value$isRoot);
    }
}