Algorithm placeholder

Algorithm/Knappsack/Backpack.php

@@ -0,0 +1,90 @@
+<?php
+/**
+ * Orange Management
+ *
+ * PHP Version 7.0
+ *
+ * @category   TBD
+ * @package    TBD
+ * @author     OMS Development Team <dev@oms.com>
+ * @author     Dennis Eichhorn <d.eichhorn@oms.com>
+ * @copyright  2013 Dennis Eichhorn
+ * @license    OMS License 1.0
+ * @version    1.0.0
+ * @link       http://orange-management.com
+ */
+namespace phpOMS\Algorithm\Knappsack;
+
+/**
+ * Knappsack algorithm implementations
+ *
+ * @category   Framework
+ * @package    phpOMS\Auth
+ * @author     OMS Development Team <dev@oms.com>
+ * @author     Dennis Eichhorn <d.eichhorn@oms.com>
+ * @license    OMS License 1.0
+ * @link       http://orange-management.com
+ * @since      1.0.0
+ */
+class Backpack
+{
+    private $costMaximum = 0;
+
+    private $value = 0;
+
+    private $cost = 0;
+
+    private $items = [];
+
+    private $population = [];
+
+    public function __construct(float $costMaximum) 
+    {
+        $this->costMaximum = $costMaximum;
+    }
+
+    public function addPopulationItem(ItemInterface $item) : bool
+    {
+        if(isset($this->population[$item->getId()])) {
+            return false;
+        }
+
+        $this->population[$item->getId()] = $item;
+
+        return true;
+    }
+
+    public function setPopulationItem(ItemInterface $item) 
+    {
+        $this->population[$item->getId()] = $item;
+    }
+
+    public function setCostCalculation(\Closure $callback)
+    {
+
+    }
+
+    public function setValueCalculation(\Closure $callback)
+    {
+
+    }
+
+    public function setTestPopulationBuilder(\Closure $callback)
+    {
+
+    }
+
+    public function pack(int $type) 
+    {
+        switch($type) {
+            case AlgorithmType::BRUTEFORCE:
+                return $this->bruteforce();
+            default:
+                throw new \Exception('Invalid algorithm type');
+        }
+    }
+
+    public function bruteforce()
+    {
+    }
+}