symfony
diff --git a/‎src/Symfony/Component/Serializer/Normalizer/DenormalizerInterface.php
Lines changed: 10 additions & 0 deletions b/‎src/Symfony/Component/Serializer/Normalizer/DenormalizerInterface.php
Lines changed: 10 additions & 0 deletions
diff --git a/‎src/Symfony/Component/Serializer/Normalizer/NormalizerInterface.php
Lines changed: 9 additions & 0 deletions b/‎src/Symfony/Component/Serializer/Normalizer/NormalizerInterface.php
Lines changed: 9 additions & 0 deletions
diff --git a/‎src/Symfony/Component/Serializer/Serializer.php
Lines changed: 60 additions & 0 deletions b/‎src/Symfony/Component/Serializer/Serializer.php
Lines changed: 60 additions & 0 deletions
@@ -27,4 +27,14 @@ interface DenormalizerInterface
      * @return object
      */
     function denormalize($data, $class, $format = null);
+
+    /**
+     * Checks whether the given class is supported for denormalization by this normalizer
+     *
+     * @param mixed   $data   Data to denormalize from.
+     * @param string  $type   The class to which the data should be denormalized.
+     * @param string  $format The format being deserialized from.
+     * @return Boolean
+     */
+    function supportsDenormalization($data, $type, $format = null);
 }
@@ -26,4 +26,13 @@ interface NormalizerInterface
      * @return array|scalar
      */
     function normalize($object, $format = null);
+
+    /**
+     * Checks whether the given class is supported for normalization by this normalizer
+     *
+     * @param mixed   $data   Data to normalize.
+     * @param string  $format The format being (de-)serialized from or into.
+     * @return Boolean
+     */
+    function supportsNormalization($data, $format = null);
 }
@@ -132,6 +132,66 @@ public function denormalize($data, $type, $format = null)
         return $this->denormalizeObject($data, $type, $format);
     }
 
+    /**
+     * {@inheritdoc}
+     */
+    public function supportsNormalization($data, $format = null)
+    {
+        try {
+            $this->getNormalizer($format);
+        } catch (\RuntimeException $e) {
+            return false;
+        }
+
+        return true;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function supportsDenormalization($data, $type, $format = null)
+    {
+        try {
+            $this->getDenormalizer($data, $format = null);
+        } catch (\RuntimeException $e) {
+            return false;
+        }
+
+        return true;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    private function getNormalizer($data, $format = null)
+    {
+        foreach ($this->normalizers as $normalizer) {
+            if ($normalizer instanceof NormalizerInterface
+                && $normalizer->supportsNormalization($data, $format)
+            ) {
+                return $normalizer;
+            }
+        }
+
+        throw new RuntimeException(sprintf('No normalizer found for format "%s".', $format));
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    private function getDenormalizer($data, $type, $format = null)
+    {
+        foreach ($this->normalizers as $normalizer) {
+            if ($normalizer instanceof DenormalizerInterface
+                && $normalizer->supportsDenormalization($data, $type, $format)
+            ) {
+                return $normalizer;
+            }
+        }
+
+        throw new RuntimeException(sprintf('No denormalizer found for format "%s".', $format));
+    }
+
     /**
      * {@inheritdoc}
      */