--- /dev/null
+<?php
+
+namespace Drupal\node;
+
+use Drupal\Core\Access\AccessResult;
+use Drupal\Core\Entity\EntityAccessControlHandler;
+use Drupal\Core\Entity\EntityInterface;
+use Drupal\Core\Session\AccountInterface;
+
+/**
+ * Defines the access control handler for the node type entity type.
+ *
+ * @see \Drupal\node\Entity\NodeType
+ */
+class NodeTypeAccessControlHandler extends EntityAccessControlHandler {
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function checkAccess(EntityInterface $entity, $operation, AccountInterface $account) {
+ switch ($operation) {
+ case 'view':
+ return AccessResult::allowedIfHasPermission($account, 'access content');
+
+ case 'delete':
+ if ($entity->isLocked()) {
+ return AccessResult::forbidden()->addCacheableDependency($entity);
+ }
+ else {
+ return parent::checkAccess($entity, $operation, $account)->addCacheableDependency($entity);
+ }
+ break;
+
+ default:
+ return parent::checkAccess($entity, $operation, $account);
+
+ }
+ }
+
+}