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File Content: `CheckCircularReferencesPass.php`

<?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\ServiceCircularReferenceException;

/**
 * Checks your services for circular references.
 *
 * References from method calls are ignored since we might be able to resolve
 * these references depending on the order in which services are called.
 *
 * Circular reference from method calls will only be detected at run-time.
 *
 * @author Johannes M. Schmitt <schmittjoh@gmail.com>
 */
class CheckCircularReferencesPass implements CompilerPassInterface
{
    private $currentPath;
    private $checkedNodes;

    /**
     * Checks the ContainerBuilder object for circular references.
     */
    public function process(ContainerBuilder $container)
    {
        $graph = $container->getCompiler()->getServiceReferenceGraph();

        $this->checkedNodes = [];
        foreach ($graph->getNodes() as $id => $node) {
            $this->currentPath = [$id];

            $this->checkOutEdges($node->getOutEdges());
        }
    }

    /**
     * Checks for circular references.
     *
     * @param ServiceReferenceGraphEdge[] $edges An array of Edges
     *
     * @throws ServiceCircularReferenceException when a circular reference is found
     */
    private function checkOutEdges(array $edges)
    {
        foreach ($edges as $edge) {
            $node = $edge->getDestNode();
            $id = $node->getId();

            if (empty($this->checkedNodes[$id])) {
                // Don't check circular references for lazy edges
                if (!$node->getValue() || (!$edge->isLazy() && !$edge->isWeak())) {
                    $searchKey = array_search($id, $this->currentPath);
                    $this->currentPath[] = $id;

                    if (false !== $searchKey) {
                        throw new ServiceCircularReferenceException($id, \array_slice($this->currentPath, $searchKey));
                    }

                    $this->checkOutEdges($node->getOutEdges());
                }

                $this->checkedNodes[$id] = true;
                array_pop($this->currentPath);
            }
        }
    }
}

Name	Size	Permission
AbstractRecursivePass.php	9547 bytes	0644
AliasDeprecatedPublicServicesPass.php	2559 bytes	0644
AnalyzeServiceReferencesPass.php	6327 bytes	0644
AttributeAutoconfigurationPass.php	7622 bytes	0644
AutoAliasServicePass.php	1908 bytes	0644
AutowirePass.php	24971 bytes	0644
AutowireRequiredMethodsPass.php	3867 bytes	0644
AutowireRequiredPropertiesPass.php	2286 bytes	0644
CheckArgumentsValidityPass.php	4386 bytes	0644
CheckCircularReferencesPass.php	2448 bytes	0644
CheckDefinitionValidityPass.php	4742 bytes	0644
CheckExceptionOnInvalidReferenceBehaviorPass.php	4653 bytes	0644
CheckReferenceValidityPass.php	1477 bytes	0644
CheckTypeDeclarationsPass.php	12663 bytes	0644
Compiler.php	2724 bytes	0644
CompilerPassInterface.php	668 bytes	0644
DecoratorServicePass.php	5614 bytes	0644
DefinitionErrorExceptionPass.php	3283 bytes	0644
ExtensionCompilerPass.php	892 bytes	0644
InlineServiceDefinitionsPass.php	7636 bytes	0644
MergeExtensionConfigurationPass.php	8360 bytes	0644
PassConfig.php	7547 bytes	0644
PriorityTaggedServiceTrait.php	6984 bytes	0644
RegisterAutoconfigureAttributesPass.php	3376 bytes	0644
RegisterEnvVarProcessorsPass.php	3004 bytes	0644
RegisterReverseContainerPass.php	2422 bytes	0644
RegisterServiceSubscribersPass.php	6651 bytes	0644
RemoveAbstractDefinitionsPass.php	908 bytes	0644
RemovePrivateAliasesPass.php	1114 bytes	0644
RemoveUnusedDefinitionsPass.php	2860 bytes	0644
ReplaceAliasByActualDefinitionPass.php	4491 bytes	0644
ResolveBindingsPass.php	10054 bytes	0644
ResolveChildDefinitionsPass.php	7702 bytes	0644
ResolveClassPass.php	1561 bytes	0644
ResolveDecoratorStackPass.php	4610 bytes	0644
ResolveEnvPlaceholdersPass.php	1357 bytes	0644
ResolveFactoryClassPass.php	1217 bytes	0644
ResolveHotPathPass.php	2553 bytes	0644
ResolveInstanceofConditionalsPass.php	7272 bytes	0644
ResolveInvalidReferencesPass.php	5332 bytes	0644
ResolveNamedArgumentsPass.php	6074 bytes	0644
ResolveNoPreloadPass.php	3364 bytes	0644
ResolveParameterPlaceHoldersPass.php	3178 bytes	0644
ResolvePrivatesPass.php	1178 bytes	0644
ResolveReferencesToAliasesPass.php	2758 bytes	0644
ResolveServiceSubscribersPass.php	1637 bytes	0644
ResolveTaggedIteratorArgumentPass.php	952 bytes	0644
ServiceLocatorTagPass.php	5407 bytes	0644
ServiceReferenceGraph.php	2645 bytes	0644
ServiceReferenceGraphEdge.php	2184 bytes	0644
ServiceReferenceGraphNode.php	2299 bytes	0644
ValidateEnvPlaceholdersPass.php	3669 bytes	0644

Name

Size

Permission

Action

AbstractRecursivePass.php

9547 bytes

0644