From 61b9c530e78840bb86e206cfc9e2ba3a3badd9bb Mon Sep 17 00:00:00 2001
From: Samuel ROZE <samuel.roze@gmail.com>
Date: Mon, 8 Jan 2018 14:40:15 +0000
Subject: [PATCH 1/2] Add documentation about the (de)serialization of
 interfaces and abstract classes

---
 components/serializer.rst | 75 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 75 insertions(+)

diff --git a/components/serializer.rst b/components/serializer.rst
index 9584b10f450..5fdfc535334 100644
--- a/components/serializer.rst
+++ b/components/serializer.rst
@@ -981,6 +981,81 @@ will be thrown. The type enforcement of the properties can be disabled by settin
 the serializer context option ``ObjectNormalizer::DISABLE_TYPE_ENFORCEMENT``
 to ``true``.
 
+Serializing interfaces and abstract classes
+-------------------------------------------
+
+When dealing with objects that are fairly similar or share properties, you'd usually use
+intefaces or abstract classes. The Serializer component allows you to serialize and deserialize
+these objects using a "discrimator class mapping".
+
+The discrimator is the field (in the serialized string) you are going to use to differentiate the
+different objects.
+
+When using the Serializer component, you need to give the :class:`Symfony\\Component\\Serializer\\Mapping\\ClassDiscriminatorResolver` to the :class:`Symfony\\Component\\Serializer\\Normalizer\\ObjectNormalizer`,
+like in the following example::
+
+    $discriminatorResolver = new ClassDiscriminatorResolver();
+    $discriminatorResolver->addClassMapping(CodeRepository::class, new ClassDiscriminatorMapping('type', [
+        'github' => GitHubCodeRepository::class,
+        'bitbucket' => BitBucketCodeRepository::class,
+    ]));
+
+    $serializer = new Serializer(array(new ObjectNormalizer(null, null, null, null, $discriminatorResolver)), array('json' => new JsonEncoder()));
+
+    $serialized = $serializer->serialize(new GitHubCodeRepository());
+    // {"type": "github"}
+
+    $repository = $serializer->unserialize($serialized, CodeRepository::class, 'json');
+    // instanceof GitHubCodeRepository
+
+If you have enabled the class metadata factory as described in [Attributes Groups](#attributes-groups), you can
+simply use the following configuration:
+
+.. configuration-block::
+
+    .. code-block:: php-annotations
+
+        namespace App;
+
+        use Symfony\Component\Serializer\Annotation\DiscriminatorMap;
+
+        /**
+         * @DiscriminatorMap(typeProperty="type", mapping={
+         *    "github"="App\GitHubCodeRepository",
+         *    "bitbucket"="App\BitBucketCodeRepository"
+         * })
+         */
+        interface CodeRepository
+        {
+            // ...
+        }
+
+    .. code-block:: yaml
+
+        App\CodeRepository:
+            discriminator_map:
+                type_property: type
+                mapping:
+                    github: 'App\GitHubCodeRepository'
+                    bitbucket: 'App\BitBucketCodeRepository'
+
+    .. code-block:: xml
+
+        <?xml version="1.0" ?>
+        <serializer xmlns="http://symfony.com/schema/dic/serializer-mapping"
+            xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+            xsi:schemaLocation="http://symfony.com/schema/dic/serializer-mapping
+                http://symfony.com/schema/dic/serializer-mapping/serializer-mapping-1.0.xsd"
+        >
+            <class name="App\CodeRepository">
+                <discriminator-map type-property="type">
+                    <mapping type="github" class="App\GitHubCodeRepository" />
+                    <mapping type="bitbucket" class="App\BitBucketCodeRepository" />
+                </discriminator-map>
+            </class>
+        </serializer>
+
+
 Learn more
 ----------
 

From ac831b081ae838acd2bb86befcfa02f5756a934f Mon Sep 17 00:00:00 2001
From: Javier Eguiluz <javier.eguiluz@gmail.com>
Date: Mon, 8 Jan 2018 17:57:37 +0100
Subject: [PATCH 2/2] Minor fixes and some tweaks

---
 components/serializer.rst | 34 ++++++++++++++++++++--------------
 1 file changed, 20 insertions(+), 14 deletions(-)

diff --git a/components/serializer.rst b/components/serializer.rst
index 5fdfc535334..b3bfed16e14 100644
--- a/components/serializer.rst
+++ b/components/serializer.rst
@@ -981,26 +981,32 @@ will be thrown. The type enforcement of the properties can be disabled by settin
 the serializer context option ``ObjectNormalizer::DISABLE_TYPE_ENFORCEMENT``
 to ``true``.
 
-Serializing interfaces and abstract classes
+Serializing Interfaces and Abstract Classes
 -------------------------------------------
 
-When dealing with objects that are fairly similar or share properties, you'd usually use
-intefaces or abstract classes. The Serializer component allows you to serialize and deserialize
-these objects using a "discrimator class mapping".
+When dealing with objects that are fairly similar or share properties, you may
+use interfaces or abstract classes. The Serializer component allows you to
+serialize and deserialize these objects using a *"discrimator class mapping"*.
 
-The discrimator is the field (in the serialized string) you are going to use to differentiate the
-different objects.
+The discriminator is the field (in the serialized string) used to differentiate
+between the possible objects. In practice, when using the Serializer component,
+pass the :class:`Symfony\\Component\\Serializer\\Mapping\\ClassDiscriminatorResolver`
+to the :class:`Symfony\\Component\\Serializer\\Normalizer\\ObjectNormalizer`.
 
-When using the Serializer component, you need to give the :class:`Symfony\\Component\\Serializer\\Mapping\\ClassDiscriminatorResolver` to the :class:`Symfony\\Component\\Serializer\\Normalizer\\ObjectNormalizer`,
-like in the following example::
+Consider an application that defines an abstract ``CodeRepository`` class
+extended by ``GitHubCodeRepository`` and ``BitBucketCodeRepository`` classes.
+This example shows how to serialize and deserialize those objects::
 
-    $discriminatorResolver = new ClassDiscriminatorResolver();
-    $discriminatorResolver->addClassMapping(CodeRepository::class, new ClassDiscriminatorMapping('type', [
+    $discriminator = new ClassDiscriminatorResolver();
+    $discriminator->addClassMapping(CodeRepository::class, new ClassDiscriminatorMapping('type', [
         'github' => GitHubCodeRepository::class,
         'bitbucket' => BitBucketCodeRepository::class,
     ]));
 
-    $serializer = new Serializer(array(new ObjectNormalizer(null, null, null, null, $discriminatorResolver)), array('json' => new JsonEncoder()));
+    $serializer = new Serializer(
+        array(new ObjectNormalizer(null, null, null, null, $discriminator)),
+        array('json' => new JsonEncoder())
+    );
 
     $serialized = $serializer->serialize(new GitHubCodeRepository());
     // {"type": "github"}
@@ -1008,8 +1014,9 @@ like in the following example::
     $repository = $serializer->unserialize($serialized, CodeRepository::class, 'json');
     // instanceof GitHubCodeRepository
 
-If you have enabled the class metadata factory as described in [Attributes Groups](#attributes-groups), you can
-simply use the following configuration:
+If the class metadata factory is enabled as explained in the
+:ref:`Attributes Groups section <component-serializer-attributes-groups>`, you
+can use this simpler configuration:
 
 .. configuration-block::
 
@@ -1055,7 +1062,6 @@ simply use the following configuration:
             </class>
         </serializer>
 
-
 Learn more
 ----------
 

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