First, initial commit

src/Meritoo/Common/Exception/Reflection/MissingChildClassesException.php

@@ -0,0 +1,38 @@
+<?php
+
+/**
+ * (c) Meritoo.pl, http://www.meritoo.pl
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Meritoo\Common\Exception\Reflection;
+
+use Exception;
+use Meritoo\Common\Utilities\Reflection;
+
+/**
+ * An exception used while given class has no child classes
+ *
+ * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
+ * @copyright Meritoo.pl
+ */
+class MissingChildClassesException extends Exception
+{
+    /**
+     * Class constructor
+     *
+     * @param array|object|string $parentClass Class that hasn't child classes, but it should. An array of objects,
+     *                                         strings, object or string.
+     */
+    public function __construct($parentClass)
+    {
+        $template = 'The \'%s\' class requires one child class at least who will extend her (maybe is an abstract'
+            . ' class), but the child classes are missing. Did you forget to extend this class?';
+
+        $parentClassName = Reflection::getClassName($parentClass);
+        $message = sprintf($template, $parentClassName);
+
+        parent::__construct($message);
+    }
+}