Rewrite bad input denormalization error (#3697)

Author: soyuka

features/jsonld/input_output.feature

@@ -319,3 +319,16 @@ Feature: JSON-LD DTO input and output
       "data": 123
     }
     """
+
+  @createSchema
+  Scenario: Create a resource with a custom Input
+    When I send a "POST" request to "/dummy_dto_customs" with body:
+    """
+    {
+      "foo": "test",
+      "bar": "test" 
+    }
+    """
+    Then the response status code should be 400
+    And the response should be in JSON
+    And the JSON node "hydra:description" should be equal to "The input data is misformatted."

src/Serializer/AbstractItemNormalizer.php

@@ -31,6 +31,7 @@
 use Symfony\Component\PropertyInfo\Type;
 use Symfony\Component\Serializer\Exception\LogicException;
 use Symfony\Component\Serializer\Exception\MissingConstructorArgumentsException;
+use Symfony\Component\Serializer\Exception\NotNormalizableValueException;
 use Symfony\Component\Serializer\Exception\RuntimeException;
 use Symfony\Component\Serializer\Exception\UnexpectedValueException;
 use Symfony\Component\Serializer\Mapping\Factory\ClassMetadataFactoryInterface;
@@ -190,9 +191,14 @@ public function denormalize($data, $class, $format = null, array $context = [])
             if (!$this->serializer instanceof DenormalizerInterface) {
                 throw new LogicException('Cannot denormalize the input because the injected serializer is not a denormalizer');
             }
-            $denormalizedInput = $this->serializer->denormalize($data, $inputClass, $format, $context);
+            try {
+                $denormalizedInput = $this->serializer->denormalize($data, $inputClass, $format, $context);
+            } catch (NotNormalizableValueException $e) {
+                throw new UnexpectedValueException('The input data is misformatted.', $e->getCode(), $e);
+            }
+
             if (!\is_object($denormalizedInput)) {
-                throw new \UnexpectedValueException('Expected denormalized input to be an object.');
+                throw new UnexpectedValueException('Expected denormalized input to be an object.');
             }
 
             return $dataTransformer->transform($denormalizedInput, $resourceClass, $dataTransformerContext);