[Serializer] Getter for extra attributes in ExtraAttributesException

src/Symfony/Component/Serializer/CHANGELOG.md

@@ -7,6 +7,7 @@ CHANGELOG
  * added `AbstractObjectNormalizer::DISABLE_TYPE_ENFORCEMENT` context option
    to disable throwing an `UnexpectedValueException` on a type mismatch
  * added support for serializing `DateInterval` objects
+ * added getter for extra attributes in `ExtraAttributesException`
 
 3.3.0
 -----

src/Symfony/Component/Serializer/Exception/ExtraAttributesException.php

@@ -18,10 +18,24 @@ namespace Symfony\Component\Serializer\Exception;
  */
 class ExtraAttributesException extends RuntimeException
 {
+    private $extraAttributes;
+
     public function __construct(array $extraAttributes, \Exception $previous = null)
     {
         $msg = sprintf('Extra attributes are not allowed ("%s" are unknown).', implode('", "', $extraAttributes));
 
+        $this->extraAttributes = $extraAttributes;
+
         parent::__construct($msg, 0, $previous);
     }
+
+    /**
+     * Get the extra attributes that are not allowed.
+     *
+     * @return array
+     */
+    public function getExtraAttributes()
+    {
+        return $this->extraAttributes;
+    }
 }