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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\Argument;
  13  
  14  use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
  15  use Symfony\Component\DependencyInjection\Reference;
  16  
  17  /**
  18   * Represents a service wrapped in a memoizing closure.
  19   *
  20   * @author Nicolas Grekas <p@tchwork.com>
  21   */
  22  class ServiceClosureArgument implements ArgumentInterface
  23  {
  24      private $values;
  25  
  26      public function __construct(Reference $reference)
  27      {
  28          $this->values = [$reference];
  29      }
  30  
  31      /**
  32       * {@inheritdoc}
  33       */
  34      public function getValues()
  35      {
  36          return $this->values;
  37      }
  38  
  39      /**
  40       * {@inheritdoc}
  41       */
  42      public function setValues(array $values)
  43      {
  44          if ([0] !== array_keys($values) || !($values[0] instanceof Reference || null === $values[0])) {
  45              throw new InvalidArgumentException('A ServiceClosureArgument must hold one and only one Reference.');
  46          }
  47  
  48          $this->values = $values;
  49      }
  50  }