symfony
diff --git a/‎src/Symfony/Bundle/FrameworkBundle/Resources/config/serializer.xml
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+6Lines changed: 6 additions & 0 deletions b/‎src/Symfony/Bundle/FrameworkBundle/Resources/config/serializer.xml
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diff --git a/‎src/Symfony/Component/Serializer/Normalizer/JsonSerializableNormalizer.php
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+42Lines changed: 42 additions & 0 deletions b/‎src/Symfony/Component/Serializer/Normalizer/JsonSerializableNormalizer.php
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+42Lines changed: 42 additions & 0 deletions
diff --git a/‎src/Symfony/Component/Serializer/Tests/Fixtures/JsonSerializableDummy.php
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+30Lines changed: 30 additions & 0 deletions b/‎src/Symfony/Component/Serializer/Tests/Fixtures/JsonSerializableDummy.php
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diff --git a/‎src/Symfony/Component/Serializer/Tests/Normalizer/JsonSerializableNormalizerTest.php
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+56Lines changed: 56 additions & 0 deletions b/‎src/Symfony/Component/Serializer/Tests/Normalizer/JsonSerializableNormalizerTest.php
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+56Lines changed: 56 additions & 0 deletions
@@ -26,6 +26,12 @@
             <tag name="serializer.normalizer" priority="-1000" />
         </service>
 
+        <!-- Json Normalizer -->
+        <service id="serializer.normalizer.json" class="Symfony\Component\Serializer\Normalizer\JsonSerializableNormalizer" public="false">
+            <!-- Run after all custom serializers, but before the ObjectNormalizer -->
+            <tag name="serializer.normalizer" priority="-900" />
+        </service>
+
         <!-- Loader -->
         <service id="serializer.mapping.chain_loader" class="Symfony\Component\Serializer\Mapping\Loader\LoaderChain" public="false">
             <argument type="collection" />
 
@@ -0,0 +1,42 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Serializer\Normalizer;
+
+use Symfony\Component\Serializer\Exception\InvalidArgumentException;
+
+/**
+ * A normalizer that uses an objects own JsonSerializable implementation.
+ *
+ * @author Fred Cox <mcfedr@gmail.com>
+ */
+class JsonSerializableNormalizer implements NormalizerInterface
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function normalize($object, $format = null, array $context = [])
+    {
+        if (!$object instanceof \JsonSerializable) {
+            throw new InvalidArgumentException('The object must implement "\JsonSerializable".');
+        }
+
+        return $object->jsonSerialize();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function supportsNormalization($data, $format = null)
+    {
+        return $data instanceof \JsonSerializable;
+    }
+}
@@ -0,0 +1,30 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Serializer\Tests\Fixtures;
+
+class JsonSerializableDummy implements \JsonSerializable
+{
+    public $foo = 'a';
+    public $bar = 'b';
+    public $baz = 'c';
+    public $qux = 'd';
+
+    public function jsonSerialize()
+    {
+        return [
+            'foo' => $this->foo,
+            'bar' => $this->bar,
+            'baz' => $this->baz,
+            'qux' => $this->qux,
+        ];
+    }
+}
@@ -0,0 +1,56 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Serializer\Tests\Normalizer;
+
+use Symfony\Component\Serializer\Normalizer\JsonSerializableNormalizer;
+use Symfony\Component\Serializer\Tests\Fixtures\JsonSerializableDummy;
+
+/**
+ * @author Fred Cox <mcfedr@gmail.com>
+ */
+class JsonSerializableNormalizerTest extends \PHPUnit_Framework_TestCase
+{
+    /**
+     * @var JsonSerializableNormalizer
+     */
+    private $normalizer;
+
+    protected function setUp()
+    {
+        $this->normalizer = new JsonSerializableNormalizer();
+    }
+
+    public function testSupportNormalization()
+    {
+        $this->assertTrue($this->normalizer->supportsNormalization(new JsonSerializableDummy()));
+        $this->assertFalse($this->normalizer->supportsNormalization(new \stdClass()));
+    }
+
+    public function testNormalize()
+    {
+        $this->assertEquals([
+            'foo' => 'a',
+            'bar' => 'b',
+            'baz' => 'c',
+            'qux' => 'd',
+        ], $this->normalizer->normalize(new JsonSerializableDummy()));
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Serializer\Exception\InvalidArgumentException
+     * @expectedExceptionMessage The object must implement "\JsonSerializable".
+     */
+    public function testInvalidDataThrowException()
+    {
+        $this->normalizer->normalize(new \stdClass());
+    }
+}