Add one example event

bootstrap.php

@@ -1,13 +1,18 @@
 <?php
 
+use App\CarEventSubscriber;
 use Doctrine\Common\Annotations\AnnotationRegistry;
 use JMS\Serializer\Annotation\Type;
+use JMS\Serializer\EventDispatcher\EventDispatcher;
 use JMS\Serializer\SerializerBuilder;
 
 $loader = require_once __DIR__ . '/vendor/autoload.php';
 AnnotationRegistry::registerLoader(array($loader, "loadClass"));
 
 $serializer = SerializerBuilder::create()
+  ->configureListeners(function (EventDispatcher $dispatcher) {
+    $dispatcher->addSubscriber(new CarEventSubscriber());
+  })
   ->build();
 
 final class Car

composer.json

@@ -6,5 +6,10 @@
         "platform": {
             "php": "7.3.*"
         }
+    },
+    "autoload": {
+        "psr-4": {
+            "App\\": "src/"
+        }
     }
 }

index.php

@@ -3,9 +3,10 @@
 require_once __DIR__ . '/bootstrap.php';
 
 //Serialize
-$opelAstra = new Car('Opel', 'Astra');
-$jsonData = $serializer->serialize($opelAstra, 'json');
-$xmlData = $serializer->serialize($opelAstra, 'xml');
+$car1 = new Car('Opel', 'Astra');
+$car2 = new Car('Audi', 'A3');
+$jsonData = $serializer->serialize($car1, 'json');
+$xmlData = $serializer->serialize($car2, 'xml');
 
 //Schrijf het resultaat naar een file
 file_put_contents("xmldata.xml", $xmlData);

src/CarEventSubscriber.php

@@ -0,0 +1,75 @@
+<?php
+
+namespace App;
+
+use Car;
+use JMS\Serializer\EventDispatcher\EventSubscriberInterface;
+use JMS\Serializer\EventDispatcher\ObjectEvent;
+use JMS\Serializer\EventDispatcher\PreDeserializeEvent;
+use JMS\Serializer\EventDispatcher\PreSerializeEvent;
+
+class CarEventSubscriber implements EventSubscriberInterface
+{
+  /**
+   * @return array|void
+   * @inheritDoc
+   */
+  public static function getSubscribedEvents()
+  {
+    //format =>json
+    return [
+      [
+        'event' => DefinedEvents::PRE_SERIALIZE,
+        'method' => 'onPreSerialize',
+        'class' => Car::class,
+        'priority' => 0,
+      ],[
+        'event' => DefinedEvents::POST_SERIALIZE,
+        'method' => 'onPostSerialize',
+        'class' => Car::class,
+        'priority' => 0,
+      ],[
+        'event' => DefinedEvents::PRE_DESERIALIZE,
+        'method' => 'onPreDeserialize',
+        'class' => Car::class,
+        'priority' => 0,
+      ],[
+        'event' => DefinedEvents::POST_DESERIALIZE,
+        'method' => 'onPostDeserialize',
+        'class' => Car::class,
+        'priority' => 0,
+      ],
+    ];
+  }
+
+
+  public function onPreSerialize(PreSerializeEvent $event)
+  {
+    echo __FUNCTION__ . ' ON ' . get_class($event->getObject());
+    echo __FILE__ . ':' . __LINE__ . PHP_EOL;
+    echo '<hr>';
+  }
+
+  public function onPostSerialize(ObjectEvent $event)
+  {
+    echo __FUNCTION__ . ' ON ' . get_class($event->getObject());
+    echo __FILE__ . ':' . __LINE__ . PHP_EOL;
+    echo '<hr>';
+  }
+
+  public function onPreDeserialize(PreDeserializeEvent $event)
+  {
+    echo __FUNCTION__;
+    echo '<br>';
+    echo  print_r($event->getData());
+    echo __FILE__ . ':' . __LINE__ . PHP_EOL;
+    echo '<hr>';
+  }
+
+  public function onPostDeserialize(ObjectEvent $event)
+  {
+//    echo __FUNCTION__ . ' ON ' . get_class($event->getObject());
+    echo __FILE__ . ':' . __LINE__ . PHP_EOL;
+    echo '<hr>';
+  }
+}

src/DefinedEvents.php

@@ -0,0 +1,16 @@
+<?php
+
+namespace App;
+
+/**
+ * Class DefinedEvents
+ * @package App
+ * de events zoals ze staan in: https://jmsyst.com/libs/serializer/master/event_system
+ */
+final class DefinedEvents
+{
+  const PRE_SERIALIZE = 'serializer.pre_serialize';
+  const POST_SERIALIZE = 'serializer.post_serialize';
+  const PRE_DESERIALIZE = 'serializer.pre_deserialize';
+  const POST_DESERIALIZE = 'serializer.post_deserialize';
+}