start a restructure

Behavioral/Strategy/ObjectCollection.php

@@ -0,0 +1,52 @@
+<?php
+
+namespace DesignPatterns\Strategy;
+
+/**
+ * Class ObjectCollection
+ */
+class ObjectCollection
+{
+    /**
+     * @var array
+     */
+    private $elements;
+
+    /**
+     * @var ComparatorInterface
+     */
+    private $comparator;
+
+    /**
+     * @param array $elements
+     */
+    public function __construct(array $elements = array())
+    {
+        $this->elements = $elements;
+    }
+
+    /**
+     * @return array
+     */
+    public function sort()
+    {
+        if (!$this->comparator){ 
+            throw new \LogicException("Comparator is not set");    
+        }
+        
+        $callback = array($this->comparator, 'compare');
+        uasort($this->elements, $callback);
+
+        return $this->elements;
+    }
+
+    /**
+     * @param ComparatorInterface $comparator
+     *
+     * @return void
+     */
+    public function setComparator(ComparatorInterface $comparator)
+    {
+        $this->comparator = $comparator;
+    }
+}