start a restructure

Structural/Decorator/Decorator.php

@@ -0,0 +1,31 @@
+<?php
+
+namespace DesignPatterns\Decorator;
+
+/**
+ * the Decorator MUST implement the RendererInterface contract, this is the key-feature
+ * of this design pattern. If not, this is no longer a Decorator but just a dumb
+ * wrapper.
+ */
+
+/**
+ * class Decorator
+ */
+abstract class Decorator implements RendererInterface
+{
+    /**
+     * @var RendererInterface
+     */
+    protected $wrapped;
+
+    /**
+     * You must type-hint the wrapped component :
+     * It ensures you can call renderData() in the subclasses !
+     * 
+     * @param RendererInterface $wrappable
+     */
+    public function __construct(RendererInterface $wrappable)
+    {
+        $this->wrapped = $wrappable;
+    }
+}