<?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;

/**

 * Represents an edge in your service graph.

 *

 * Value is typically a reference.

 *

 * @author Johannes M. Schmitt <schmittjoh@gmail.com>

 */

class ServiceReferenceGraphEdge

{

    private $sourceNode;

    private $destNode;

    private $value;

    /**

     * Constructor.

     *

     * @param ServiceReferenceGraphNode $sourceNode

     * @param ServiceReferenceGraphNode $destNode

     * @param string $value

     */

    public function __construct(ServiceReferenceGraphNode $sourceNode, ServiceReferenceGraphNode $destNode, $value = null)

    {

        $this->sourceNode = $sourceNode;

        $this->destNode = $destNode;

        $this->value = $value;

    }

    /**

     * Returns the value of the edge

     *

     * @return ServiceReferenceGraphNode

     */

    public function getValue()

    {

        return $this->value;

    }

    /**

     * Returns the source node

     *

     * @return ServiceReferenceGraphNode

     */

    public function getSourceNode()

    {

        return $this->sourceNode;

    }

    /**

     * Returns the destination node

     *

     * @return ServiceReferenceGraphNode

     */

    public function getDestNode()

    {

        return $this->destNode;

    }

}