+<?php
+
+/**
+ * @file
+ * Contains \Drupal\filefield_sources\Access\FieldAccessCheck.
+ */
+
+namespace Drupal\filefield_sources\Access;
+
+use Drupal\Core\Routing\Access\AccessInterface as RoutingAccessInterface;
+use Drupal\Core\Session\AccountInterface;
+
+/**
+ * Access check for file field source routes.
+ */
+class FieldAccessCheck implements RoutingAccessInterface {
+
+ /**
+ * Checks access.
+ *
+ * @param string $entity_type
+ * Entity type.
+ * @param string $bundle_name
+ * Bundle name.
+ * @param string $field_name
+ * Field name.
+ * @param \Drupal\Core\Session\AccountInterface $account
+ * The currently logged in account.
+ *
+ * @return string
+ * A \Drupal\Core\Access\AccessInterface constant value.
+ */
+ public function access($entity_type, $bundle_name, $field_name, AccountInterface $account) {
+ $field = entity_load('field_config', $entity_type . '.' . $bundle_name . '.' . $field_name);
+ return $field->access('edit', $account, TRUE);
+ }
+
+}