Update to drupal 8.0.0-rc1. For more information, see https://www.drupal.org/node/2582663

vendor/zendframework/zend-hydrator/src/Reflection.php

@@ -0,0 +1,95 @@
+<?php
+/**
+ * Zend Framework (http://framework.zend.com/)
+ *
+ * @link      http://github.com/zendframework/zf2 for the canonical source repository
+ * @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license   http://framework.zend.com/license/new-bsd New BSD License
+ */
+
+namespace Zend\Hydrator;
+
+use ReflectionClass;
+use ReflectionProperty;
+
+class Reflection extends AbstractHydrator
+{
+    /**
+     * Simple in-memory array cache of ReflectionProperties used.
+     * @var ReflectionProperty[]
+     */
+    protected static $reflProperties = [];
+
+    /**
+     * Extract values from an object
+     *
+     * @param  object $object
+     * @return array
+     */
+    public function extract($object)
+    {
+        $result = [];
+        foreach (self::getReflProperties($object) as $property) {
+            $propertyName = $this->extractName($property->getName(), $object);
+            if (!$this->filterComposite->filter($propertyName)) {
+                continue;
+            }
+
+            $value = $property->getValue($object);
+            $result[$propertyName] = $this->extractValue($propertyName, $value, $object);
+        }
+
+        return $result;
+    }
+
+    /**
+     * Hydrate $object with the provided $data.
+     *
+     * @param  array $data
+     * @param  object $object
+     * @return object
+     */
+    public function hydrate(array $data, $object)
+    {
+        $reflProperties = self::getReflProperties($object);
+        foreach ($data as $key => $value) {
+            $name = $this->hydrateName($key, $data);
+            if (isset($reflProperties[$name])) {
+                $reflProperties[$name]->setValue($object, $this->hydrateValue($name, $value, $data));
+            }
+        }
+        return $object;
+    }
+
+    /**
+     * Get a reflection properties from in-memory cache and lazy-load if
+     * class has not been loaded.
+     *
+     * @param  string|object $input
+     * @throws Exception\InvalidArgumentException
+     * @return ReflectionProperty[]
+     */
+    protected static function getReflProperties($input)
+    {
+        if (is_object($input)) {
+            $input = get_class($input);
+        } elseif (!is_string($input)) {
+            throw new Exception\InvalidArgumentException('Input must be a string or an object.');
+        }
+
+        if (isset(static::$reflProperties[$input])) {
+            return static::$reflProperties[$input];
+        }
+
+        static::$reflProperties[$input] = [];
+        $reflClass                      = new ReflectionClass($input);
+        $reflProperties                 = $reflClass->getProperties();
+
+        foreach ($reflProperties as $property) {
+            $property->setAccessible(true);
+            static::$reflProperties[$input][$property->getName()] = $property;
+        }
+
+        return static::$reflProperties[$input];
+    }
+}