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   1  <?php
   2  
   3  declare(strict_types=1);
   4  
   5  namespace ProxyManager\Factory;
   6  
   7  use ProxyManager\Proxy\NullObjectInterface;
   8  use ProxyManager\ProxyGenerator\NullObjectGenerator;
   9  use ProxyManager\ProxyGenerator\ProxyGeneratorInterface;
  10  use ProxyManager\Signature\Exception\InvalidSignatureException;
  11  use ProxyManager\Signature\Exception\MissingSignatureException;
  12  
  13  /**
  14   * Factory responsible of producing proxy objects
  15   *
  16   * @author Vincent Blanchon <blanchon.vincent@gmail.com>
  17   * @license MIT
  18   */
  19  class NullObjectFactory extends AbstractBaseFactory
  20  {
  21      /**
  22       * @var \ProxyManager\ProxyGenerator\NullObjectGenerator|null
  23       */
  24      private $generator;
  25  
  26      /**
  27       * @param object|string $instanceOrClassName the object to be wrapped or interface to transform to null object
  28       *
  29       * @throws InvalidSignatureException
  30       * @throws MissingSignatureException
  31       * @throws \OutOfBoundsException
  32       */
  33      public function createProxy($instanceOrClassName) : NullObjectInterface
  34      {
  35          $className      = is_object($instanceOrClassName) ? get_class($instanceOrClassName) : $instanceOrClassName;
  36          $proxyClassName = $this->generateProxy($className);
  37  
  38          return $proxyClassName::staticProxyConstructor();
  39      }
  40  
  41      /**
  42       * {@inheritDoc}
  43       */
  44      protected function getGenerator() : ProxyGeneratorInterface
  45      {
  46          return $this->generator ?: $this->generator = new NullObjectGenerator();
  47      }
  48  }