1 <?php

     2 

     3 /*

     4  * This file is part of the Symfony package.

     5  *

     6  * (c) Fabien Potencier <fabien@symfony.com>

     7  *

     8  * For the full copyright and license information, please view the LICENSE

     9  * file that was distributed with this source code.

    10  */

    11 

    12 namespace Symfony\Component\DependencyInjection\Compiler;

    13 

    14 use Symfony\Component\DependencyInjection\Definition;

    15 use Symfony\Component\DependencyInjection\Alias;

    16 

    17 /**

    18  * Represents a node in your service graph.

    19  *

    20  * Value is typically a definition, or an alias.

    21  *

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

    23  */

    24 class ServiceReferenceGraphNode

    25 {

    26     private $id;

    27     private $inEdges;

    28     private $outEdges;

    29     private $value;

    30 

    31     /**

    32      * Constructor.

    33      *

    34      * @param string $id The node identifier

    35      * @param mixed $value The node value

    36      */

    37     public function __construct($id, $value)

    38     {

    39         $this->id = $id;

    40         $this->value = $value;

    41         $this->inEdges = array();

    42         $this->outEdges = array();

    43     }

    44 

    45     /**

    46      * Adds an in edge to this node.

    47      *

    48      * @param ServiceReferenceGraphEdge $edge

    49      */

    50     public function addInEdge(ServiceReferenceGraphEdge $edge)

    51     {

    52         $this->inEdges[] = $edge;

    53     }

    54 

    55     /**

    56      * Adds an out edge to this node.

    57      *

    58      * @param ServiceReferenceGraphEdge $edge

    59      */

    60     public function addOutEdge(ServiceReferenceGraphEdge $edge)

    61     {

    62         $this->outEdges[] = $edge;

    63     }

    64 

    65     /**

    66      * Checks if the value of this node is an Alias.

    67      *

    68      * @return Boolean True if the value is an Alias instance

    69      */

    70     public function isAlias()

    71     {

    72         return $this->value instanceof Alias;

    73     }

    74 

    75     /**

    76      * Checks if the value of this node is a Definition.

    77      *

    78      * @return Boolean True if the value is a Definition instance

    79      */

    80     public function isDefinition()

    81     {

    82         return $this->value instanceof Definition;

    83     }

    84 

    85     /**

    86      * Returns the identifier.

    87      *

    88      * @return string

    89      */

    90     public function getId()

    91     {

    92         return $this->id;

    93     }

    94 

    95     /**

    96      * Returns the in edges.

    97      *

    98      * @return array The in ServiceReferenceGraphEdge array

    99      */

   100     public function getInEdges()

   101     {

   102         return $this->inEdges;

   103     }

   104 

   105     /**

   106      * Returns the out edges.

   107      *

   108      * @return array The out ServiceReferenceGraphEdge array

   109      */

   110     public function getOutEdges()

   111     {

   112         return $this->outEdges;

   113     }

   114 

   115     /**

   116      * Returns the value of this Node

   117      *

   118      * @return mixed The value

   119      */

   120     public function getValue()

   121     {

   122         return $this->value;

   123     }

   124 }