start a restructure

Behavioral/Specification/Plus.php

@@ -0,0 +1,37 @@
+<?php
+namespace DesignPatterns\Specification;
+
+/**
+ * A logical AND specification
+ */
+class Plus extends AbstractSpecification
+{
+
+    protected $left;
+    protected $right;
+
+    /**
+     * Creation of a locical AND of two specifications
+     * 
+     * @param SpecificationInterface $left
+     * @param SpecificationInterface $right
+
+     */
+    public function __construct(SpecificationInterface $left, SpecificationInterface $right)
+    {
+        $this->left = $left;
+        $this->right = $right;
+    }
+
+    /**
+     * Checks if the composite AND of specifications passes
+     * 
+     * @param Item $item
+     * 
+     * @return bool
+     */
+    public function isSatisfiedBy(Item $item)
+    {
+        return $this->left->isSatisfiedBy($item) && $this->right->isSatisfiedBy($item);
+    }
+}