entity_print-8.x-2.2/src/Renderer/RendererFactory.php

<?php

namespace Drupal\entity_print\Renderer;

use Drupal\Component\DependencyInjection\ContainerInterface;
use Drupal\Core\Entity\EntityInterface;
use Drupal\entity_print\PrintEngineException;

/**
 * The RendererFactory class.
 */
class RendererFactory implements RendererFactoryInterface {

  /**
   * The container service.
   *
   * @var \Drupal\Component\DependencyInjection\ContainerInterface
   */
  protected $container;

  public function __construct(ContainerInterface $container) {
    $this->container = $container;
  }

  /**
   * {@inheritdoc}
   */
  public function create($item, $context = 'entity') {
    $entity_type_manager = $this->container->get('entity_type.manager');

    // If we get an array or something, just look at the first one.
    if (is_array($item)) {
      $item = reset($item);
    }

    if ($item instanceof EntityInterface && $entity_type_manager->hasHandler($item->getEntityTypeId(), 'entity_print')) {
      return $entity_type_manager->getHandler($item->getEntityTypeId(), 'entity_print');
    }

    throw new PrintEngineException(sprintf('Rendering not yet supported for "%s". Entity Print context "%s"', is_object($item) ? get_class($item) : $item, $context));
  }

}