cs Iterator and Registry

Iterator/File.php

@@ -0,0 +1,51 @@
+<?php
+
+namespace DesignPatterns\Iterator;
+
+/**
+ * iterator pattern
+ *
+ * Purpose:
+ * to make an object iterable
+ *
+ * Examples:
+ * - to process a file line by line by just running over all lines (which have an object representation) for a file
+ *   (which of course is an object, too)
+ *
+ * Note:
+ * Standard PHP Library (SPL) defines an interface Iterator which is best suited for this!
+ * Often you would want to implement the Countable interface too, to allow count($object) on your iterable object
+ *
+ * THIS EXAMPLE ALSO APPLIES THE COMPOSITE PATTERN
+ *
+ */
+class File
+{
+    /**
+     * @var RowSet
+     */
+    protected $rowSet;
+
+    /**
+     * @var string
+     */
+    protected $pathName;
+
+    /**
+     * @param string $pathName
+     */
+    public function __construct($pathName)
+    {
+        $this->rowSet = new Rowset($this);
+    }
+
+    /**
+     * processes the rowSet
+     */
+    public function process()
+    {
+        // this is the place to show how using an iterator, with foreach
+        // See the CardGame.php file
+        $this->rowSet->process();
+    }
+}