MAGETWO-59444: Create serializer interface and json class in framework

app/etc/di.xml

@@ -154,7 +154,7 @@
     <preference for="Magento\Framework\EntityManager\MapperInterface" type="Magento\Framework\EntityManager\CompositeMapper"/>
     <preference for="Magento\Framework\Console\CommandListInterface" type="Magento\Framework\Console\CommandList"/>
     <preference for="Magento\Framework\DataObject\IdentityGeneratorInterface" type="Magento\Framework\DataObject\IdentityService" />
-    <preference for="Magento\Framework\Json\JsonInterface" type="Magento\Framework\Json\Json" />
+    <preference for="Magento\Framework\Serialize\SerializerInterface" type="Magento\Framework\Serialize\Json" />
     <type name="Magento\Framework\Model\ResourceModel\Db\TransactionManager" shared="false" />
     <type name="Magento\Framework\Logger\Handler\Base">
         <arguments>

lib/internal/Magento/Framework/Serialize/Json.php

@@ -0,0 +1,25 @@
+<?php
+/**
+ * Copyright © 2016 Magento. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+namespace Magento\Framework\Serialize;
+
+class Json implements SerializerInterface
+{
+    /**
+     * {@inheritDoc}
+     */
+    public function serialize($data)
+    {
+        return json_encode($data);
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public function unserialize($string)
+    {
+        return json_decode($string, true);
+    }
+}

lib/internal/Magento/Framework/Serialize/SerializerInterface.php

@@ -0,0 +1,26 @@
+<?php
+/**
+ * Copyright © 2016 Magento. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+namespace Magento\Framework\Serialize;
+
+interface SerializerInterface
+{
+    /**
+     * Serialize data into string
+     *
+     * @param array|string $data
+     * @return string|bool
+     */
+    public function serialize($data);
+
+    /**
+     * Unserialize the given string into array
+     *
+     * @param string $string
+     * @param int $objectDecodeType
+     * @return array
+     */
+    public function unserialize($string);
+}

lib/internal/Magento/Framework/Json/Test/Unit/JsonTest.php → lib/internal/Magento/Framework/Serialize/Test/Unit/JsonTest.php

@@ -3,15 +3,15 @@
  * Copyright © 2016 Magento. All rights reserved.
  * See COPYING.txt for license details.
  */
-namespace Magento\Framework\Json\Test\Unit;
+namespace Magento\Framework\Serialize\Test\Unit;
 
-use Magento\Framework\Json\JsonInterface;
-use Magento\Framework\Json\Json;
+use Magento\Framework\Serialize\SerializerInterface;
+use Magento\Framework\Serialize\Json;
 
 class JsonTest extends \PHPUnit_Framework_TestCase
 {
     /**
-     * @var Json
+     * @var \Magento\Framework\Serialize\Json
      */
     private $json;
 
@@ -26,10 +26,10 @@ protected function setUp()
      * @param int $objectDecodeType
      * @dataProvider encodeDecodeDataProvider
      */
-    public function testEncodeDecode($value, $objectDecodeType)
+    public function testEncodeDecode($value)
     {
         $this->assertEquals(
-            $this->json->decode($this->json->encode($value), $objectDecodeType),
+            $this->json->unserialize($this->json->serialize($value)),
             $value
         );
     }
@@ -39,11 +39,10 @@ public function encodeDecodeDataProvider()
         $object = new \stdClass();
         $object->a = 'b';
         return [
-            ['', JsonInterface::TYPE_ARRAY],
-            [null, JsonInterface::TYPE_ARRAY],
-            [false, JsonInterface::TYPE_ARRAY],
-            [['a' => 'b'], JsonInterface::TYPE_ARRAY],
-            [$object, JsonInterface::TYPE_OBJECT]
+            [''],
+            [null],
+            [false],
+            [['a' => 'b']],
         ];
     }
 }