[Serializer] Split supports in supportsNormalization and supportsDenormalization

UPDATE.md

@@ -124,6 +124,9 @@ beta1 to beta2
           'allow_delete' => true,
       ));
 
+* Serializer: The NormalizerInterface's `supports()` method has been split in
+  two methods: `supportsNormalization` and `supportsDenormalization`.
+
 PR12 to beta1
 -------------
 
@@ -210,11 +213,11 @@ PR11 to PR12
         <app:engine>twig</app:engine>
         <twig:extension>twig.extension.debug</twig:extension>
 
-* Fixes a critical security issue which allowed all users to switch to 
+* Fixes a critical security issue which allowed all users to switch to
   arbitrary accounts when the SwitchUserListener was activated. Configurations
   which do not use the SwitchUserListener are not affected.
 
-* The Dependency Injection Container now strongly validates the references of 
+* The Dependency Injection Container now strongly validates the references of
   all your services at the end of its compilation process. If you have invalid
   references this will result in a compile-time exception instead of a run-time
   exception (the previous behavior).

src/Symfony/Component/Serializer/Normalizer/CustomNormalizer.php

@@ -39,13 +39,27 @@ class CustomNormalizer extends AbstractNormalizer
     /**
      * Checks if the given class implements the NormalizableInterface.
      *
-     * @param ReflectionClass $class  A ReflectionClass instance of the class
-     *                                to serialize into or from.
-     * @param string          $format The format being (de-)serialized from or into.
+     * @param mixed   $data   Data to normalize.
+     * @param string  $format The format being (de-)serialized from or into.
      * @return Boolean
      */
-    public function supports(\ReflectionClass $class, $format = null)
+    public function supportsNormalization($data, $format = null)
     {
-        return $class->implementsInterface('Symfony\Component\Serializer\Normalizer\NormalizableInterface');
+        return $data instanceof NormalizableInterface;
+    }
+
+    /**
+     * Checks if the given class implements the NormalizableInterface.
+     *
+     * @param mixed   $data   Data to denormalize from.
+     * @param string  $type   The class to which the data should be denormalized.
+     * @param string  $format The format being deserialized from.
+     * @return Boolean
+     */
+    public function supportsDenormalization($data, $type, $format = null)
+    {
+        $class = new \ReflectionClass($type);
+
+        return $class->isSubclassOf('Symfony\Component\Serializer\Normalizer\NormalizableInterface');
     }
 }

src/Symfony/Component/Serializer/Normalizer/GetSetMethodNormalizer.php

@@ -107,23 +107,37 @@ class GetSetMethodNormalizer extends AbstractNormalizer
         return $object;
     }
 
+    /**
+     * {@inheritDoc}
+     */
+    public function supportsNormalization($data, $format = null)
+    {
+        return $this->supports(get_class($data));
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public function supportsDenormalization($data, $type, $format = null)
+    {
+        return $this->supports($type);
+    }
+
     /**
      * Checks if the given class has any get{Property} method.
      *
-     * @param ReflectionClass $class  A ReflectionClass instance of the class
-     *                                to serialize into or from.
-     * @param string          $format The format being (de-)serialized from or into.
-     * @return Boolean Whether the class has any getters.
+     * @param string $class
+     * @return Boolean
      */
-    public function supports(\ReflectionClass $class, $format = null)
+    private function supports($class)
     {
+        $class = new \ReflectionClass($type);
         $methods = $class->getMethods(\ReflectionMethod::IS_PUBLIC);
         foreach ($methods as $method) {
             if ($this->isGetMethod($method)) {
                 return true;
             }
         }
-
         return false;
     }
 

src/Symfony/Component/Serializer/Normalizer/NormalizerInterface.php

@@ -43,16 +43,25 @@ interface NormalizerInterface
     function denormalize($data, $class, $format = null);
 
     /**
-     * Checks whether the given class is supported by this normalizer
-     *
-     * @param ReflectionClass $class
-     * @param string          $format format the given data was extracted from
+     * Checks whether the given class is supported for normalization by this normalizer
      *
+     * @param mixed   $data   Data to normalize.
+     * @param string  $format The format being (de-)serialized from or into.
      * @return Boolean
+     * @api
+     */
+    function supportsNormalization($data, $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
      * @api
      */
-    function supports(\ReflectionClass $class, $format = null);
+    function supportsDenormalization($data, $type, $format = null);
 
     /**
      * Sets the owning Serializer object

src/Symfony/Component/Serializer/Serializer.php

@@ -31,6 +31,7 @@ class Serializer implements SerializerInterface
     private $normalizers = array();
     private $encoders = array();
     protected $normalizerCache = array();
+    protected $denormalizerCache = array();
 
     /**
      * @param mixed $value value to test
@@ -68,9 +69,8 @@ class Serializer implements SerializerInterface
         if (isset($this->normalizerCache[$class][$format])) {
             return $this->normalizerCache[$class][$format]->normalize($object, $format, $properties);
         }
-        $reflClass = new \ReflectionClass($class);
         foreach ($this->normalizers as $normalizer) {
-            if ($normalizer->supports($reflClass, $format)) {
+            if ($normalizer->supportsNormalization($object, $class, $format)) {
                 $this->normalizerCache[$class][$format] = $normalizer;
                 return $normalizer->normalize($object, $format, $properties);
             }
@@ -86,13 +86,12 @@ class Serializer implements SerializerInterface
         if (!$this->normalizers) {
             throw new \LogicException('You must register at least one normalizer to be able to denormalize objects.');
         }
-        if (isset($this->normalizerCache[$class][$format])) {
-            return $this->normalizerCache[$class][$format]->denormalize($data, $class, $format);
+        if (isset($this->denormalizerCache[$class][$format])) {
+            return $this->denormalizerCache[$class][$format]->denormalize($data, $class, $format);
         }
-        $reflClass = new \ReflectionClass($class);
         foreach ($this->normalizers as $normalizer) {
-            if ($normalizer->supports($reflClass, $format)) {
-                $this->normalizerCache[$class][$format] = $normalizer;
+            if ($normalizer->supportsDenormalization($class, $format)) {
+                $this->denormalizerCache[$class][$format] = $normalizer;
                 return $normalizer->denormalize($data, $class, $format);
             }
         }
@@ -107,22 +106,22 @@ class Serializer implements SerializerInterface
         if (!$this->isStructuredType($data)) {
             return $data;
         }
-        if (is_array($data)) {
-            foreach ($data as $key => $val) {
-                $data[$key] = $this->isStructuredType($val) ? $this->normalize($val, $format) : $val;
-            }
-            return $data;
-        }
         if ($data instanceof Traversable) {
             $normalized = array();
             foreach ($data as $key => $val) {
-                $normalized[$key] = $this->isStructuredType($val) ? $this->normalize($val, $format) : $val;
+                $normalized[$key] = $this->normalize($val, $format);
             }
             return $normalized;
         }
         if (is_object($data)) {
             return $this->normalizeObject($data, $format);
         }
+        if (is_array($data)) {
+            foreach ($data as $key => $val) {
+                $data[$key] = $this->normalize($val, $format);
+            }
+            return $data;
+        }
         throw new \UnexpectedValueException('An unexpected value could not be normalized: '.var_export($data, true));
     }
 

tests/Symfony/Tests/Component/Serializer/Normalizer/CustomNormalizerTest.php

@@ -44,9 +44,15 @@ class CustomNormalizerTest extends \PHPUnit_Framework_TestCase
         $this->assertNull($obj->xmlFoo);
     }
 
-    public function testSupports()
+    public function testSupportsNormalization()
     {
-        $this->assertTrue($this->normalizer->supports(new \ReflectionClass(get_class(new ScalarDummy))));
-        $this->assertFalse($this->normalizer->supports(new \ReflectionClass('stdClass')));
+        $this->assertTrue($this->normalizer->supportsNormalization(new ScalarDummy));
+        $this->assertFalse($this->normalizer->supportsNormalization(new \stdClass));
+    }
+
+    public function testSupportsDenormalization()
+    {
+        $this->assertTrue($this->normalizer->supportsDenormalization(array(), 'Symfony\Tests\Component\Serializer\Fixtures\ScalarDummy'));
+        $this->assertFalse($this->normalizer->supportsDenormalization(array(), 'stdClass'));
     }
 }