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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\ContainerInterface;
use Symfony\Component\DependencyInjection\Reference;
use Symfony\Component\DependencyInjection\ContainerBuilder;
use Symfony\Component\DependencyInjection\Exception\RuntimeException;
/**
* Emulates the invalid behavior if the reference is not found within the
* container.
*
* @author Johannes M. Schmitt <schmittjoh@gmail.com>
*/
class ResolveInvalidReferencesPass implements CompilerPassInterface
{
private $container;
/**
* Process the ContainerBuilder to resolve invalid references.
*
* @param ContainerBuilder $container
*/
public function process(ContainerBuilder $container)
{
$this->container = $container;
foreach ($container->getDefinitions() as $definition) {
if ($definition->isSynthetic() || $definition->isAbstract()) {
continue;
}
$definition->setArguments(
$this->processArguments($definition->getArguments())
);
$calls = array();
foreach ($definition->getMethodCalls() as $call) {
try {
$calls[] = array($call[0], $this->processArguments($call[1], true));
} catch (RuntimeException $e) {
// this call is simply removed
}
}
$definition->setMethodCalls($calls);
$properties = array();
foreach ($definition->getProperties() as $name => $value) {
try {
$value = $this->processArguments(array($value), true);
$properties[$name] = reset($value);
} catch (RuntimeException $e) {
// ignore property
}
}
$definition->setProperties($properties);
}
}
/**
* Processes arguments to determine invalid references.
*
* @param array $arguments An array of Reference objects
* @param bool $inMethodCall
* @param bool $inCollection
*
* @return array
*
* @throws RuntimeException When the config is invalid
*/
private function processArguments(array $arguments, $inMethodCall = false, $inCollection = false)
{
$isNumeric = array_keys($arguments) === range(0, count($arguments) - 1);
foreach ($arguments as $k => $argument) {
if (is_array($argument)) {
$arguments[$k] = $this->processArguments($argument, $inMethodCall, true);
} elseif ($argument instanceof Reference) {
$id = (string) $argument;
$invalidBehavior = $argument->getInvalidBehavior();
$exists = $this->container->has($id);
// resolve invalid behavior
if (!$exists && ContainerInterface::NULL_ON_INVALID_REFERENCE === $invalidBehavior) {
$arguments[$k] = null;
} elseif (!$exists && ContainerInterface::IGNORE_ON_INVALID_REFERENCE === $invalidBehavior) {
if ($inCollection) {
unset($arguments[$k]);
continue;
}
if ($inMethodCall) {
throw new RuntimeException('Method shouldn\'t be called.');
}
$arguments[$k] = null;
}
}
}
// Ensure numerically indexed arguments have sequential numeric keys.
if ($isNumeric) {
$arguments = array_values($arguments);
}
return $arguments;
}
}