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   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       * @param string $id    The node identifier
  33       * @param mixed  $value The node value
  34       */
  35      public function __construct($id, $value)
  36      {
  37          $this->id = $id;
  38          $this->value = $value;
  39          $this->inEdges = array();
  40          $this->outEdges = array();
  41      }
  42  
  43      /**
  44       * Adds an in edge to this node.
  45       *
  46       * @param ServiceReferenceGraphEdge $edge
  47       */
  48      public function addInEdge(ServiceReferenceGraphEdge $edge)
  49      {
  50          $this->inEdges[] = $edge;
  51      }
  52  
  53      /**
  54       * Adds an out edge to this node.
  55       *
  56       * @param ServiceReferenceGraphEdge $edge
  57       */
  58      public function addOutEdge(ServiceReferenceGraphEdge $edge)
  59      {
  60          $this->outEdges[] = $edge;
  61      }
  62  
  63      /**
  64       * Checks if the value of this node is an Alias.
  65       *
  66       * @return bool True if the value is an Alias instance
  67       */
  68      public function isAlias()
  69      {
  70          return $this->value instanceof Alias;
  71      }
  72  
  73      /**
  74       * Checks if the value of this node is a Definition.
  75       *
  76       * @return bool True if the value is a Definition instance
  77       */
  78      public function isDefinition()
  79      {
  80          return $this->value instanceof Definition;
  81      }
  82  
  83      /**
  84       * Returns the identifier.
  85       *
  86       * @return string
  87       */
  88      public function getId()
  89      {
  90          return $this->id;
  91      }
  92  
  93      /**
  94       * Returns the in edges.
  95       *
  96       * @return array The in ServiceReferenceGraphEdge array
  97       */
  98      public function getInEdges()
  99      {
 100          return $this->inEdges;
 101      }
 102  
 103      /**
 104       * Returns the out edges.
 105       *
 106       * @return array The out ServiceReferenceGraphEdge array
 107       */
 108      public function getOutEdges()
 109      {
 110          return $this->outEdges;
 111      }
 112  
 113      /**
 114       * Returns the value of this Node.
 115       *
 116       * @return mixed The value
 117       */
 118      public function getValue()
 119      {
 120          return $this->value;
 121      }
 122  }