Version 1

[yaffs-website] / web / core / lib / Drupal / Core / Validation / Plugin / Validation / Constraint / IsNullConstraintValidator.php

diff --git a/web/core/lib/Drupal/Core/Validation/Plugin/Validation/Constraint/IsNullConstraintValidator.php b/web/core/lib/Drupal/Core/Validation/Plugin/Validation/Constraint/IsNullConstraintValidator.php
new file mode 100644 (file)
index 0000000..39162ac
--- /dev/null
+++ b/web/core/lib/Drupal/Core/Validation/Plugin/Validation/Constraint/IsNullConstraintValidator.php
@@ -0,0 +1,31 @@
+<?php
+
+namespace Drupal\Core\Validation\Plugin\Validation\Constraint;
+
+use Drupal\Core\TypedData\ComplexDataInterface;
+use Drupal\Core\TypedData\ListInterface;
+use Drupal\Core\TypedData\Validation\TypedDataAwareValidatorTrait;
+use Symfony\Component\Validator\Constraint;
+use Symfony\Component\Validator\Constraints\IsNullValidator;
+
+/**
+ * Null constraint validator.
+ *
+ * Overrides the symfony validator to handle empty Typed Data structures.
+ */
+class IsNullConstraintValidator extends IsNullValidator {
+
+  use TypedDataAwareValidatorTrait;
+
+  /**
+   * {@inheritdoc}
+   */
+  public function validate($value, Constraint $constraint) {
+    $typed_data = $this->getTypedData();
+    if (($typed_data instanceof ListInterface || $typed_data instanceof ComplexDataInterface) && $typed_data->isEmpty()) {
+      $value = NULL;
+    }
+    parent::validate($value, $constraint);
+  }
+
+}