Actualización

vendor/winzou/state-machine/src/SM/Callback/CallbackFactory.php

@@ -0,0 +1,50 @@
+<?php
+
+/*
+ * This file is part of the StateMachine package.
+ *
+ * (c) Alexandre Bacco
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace SM\Callback;
+
+use SM\SMException;
+
+class CallbackFactory implements CallbackFactoryInterface
+{
+    /**
+     * @var string
+     */
+    protected $class;
+
+    public function __construct($class)
+    {
+        if (!class_exists($class)) {
+            throw new SMException(sprintf(
+               'Class %s given to CallbackFactory does not exist.',
+                $class
+            ));
+        }
+
+        $this->class = $class;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public function get(array $specs)
+    {
+        if (!isset($specs['do'])) {
+            throw new SMException(sprintf(
+               'CallbackFactory::get needs the index "do" to be able to build a callback, array %s given.',
+                json_encode($specs)
+            ));
+        }
+
+        $class = $this->class;
+        return new $class($specs, $specs['do']);
+    }
+}