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

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

@@ -0,0 +1,73 @@
+<?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 Zend\ServiceManager\AbstractPluginManager;
+
+/**
+ * Plugin manager implementation for hydrators.
+ *
+ * Enforces that adapters retrieved are instances of HydratorInterface
+ */
+class HydratorPluginManager extends AbstractPluginManager
+{
+    /**
+     * Whether or not to share by default
+     *
+     * @var bool
+     */
+    protected $shareByDefault = false;
+
+    /**
+     * Default aliases
+     *
+     * @var array
+     */
+    protected $aliases = [
+        'delegatinghydrator' => 'Zend\Hydrator\DelegatingHydrator',
+    ];
+
+    /**
+     * Default set of adapters
+     *
+     * @var array
+     */
+    protected $invokableClasses = [
+        'arrayserializable' => 'Zend\Hydrator\ArraySerializable',
+        'classmethods'      => 'Zend\Hydrator\ClassMethods',
+        'objectproperty'    => 'Zend\Hydrator\ObjectProperty',
+        'reflection'        => 'Zend\Hydrator\Reflection'
+    ];
+
+    /**
+     * Default factory-based adapters
+     *
+     * @var array
+     */
+    protected $factories = [
+        'Zend\Hydrator\DelegatingHydrator' => 'Zend\Hydrator\DelegatingHydratorFactory',
+    ];
+
+    /**
+     * {@inheritDoc}
+     */
+    public function validatePlugin($plugin)
+    {
+        if ($plugin instanceof HydratorInterface) {
+            // we're okay
+            return;
+        }
+
+        throw new Exception\RuntimeException(sprintf(
+            'Plugin of type %s is invalid; must implement Zend\Hydrator\HydratorInterface',
+            (is_object($plugin) ? get_class($plugin) : gettype($plugin))
+        ));
+    }
+}