vendor/symfony/symfony/src/Symfony/Component/DependencyInjection/Compiler/ServiceReferenceGraphNode.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\Definition;
use Symfony\Component\DependencyInjection\Alias;

/**
 * Represents a node in your service graph.
 *
 * Value is typically a definition, or an alias.
 *
 * @author Johannes M. Schmitt <schmittjoh@gmail.com>
 */
class ServiceReferenceGraphNode
{
    private $id;
    private $inEdges = array();
    private $outEdges = array();
    private $value;

    /**
     * @param string $id    The node identifier
     * @param mixed  $value The node value
     */
    public function __construct($id, $value)
    {
        $this->id = $id;
        $this->value = $value;
    }

    /**
     * Adds an in edge to this node.
     *
     * @param ServiceReferenceGraphEdge $edge
     */
    public function addInEdge(ServiceReferenceGraphEdge $edge)
    {
        $this->inEdges[] = $edge;
    }

    /**
     * Adds an out edge to this node.
     *
     * @param ServiceReferenceGraphEdge $edge
     */
    public function addOutEdge(ServiceReferenceGraphEdge $edge)
    {
        $this->outEdges[] = $edge;
    }