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vendor/phpunit/php-code-coverage/src/Node/Iterator.php

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+<?php
+/*
+ * This file is part of the php-code-coverage package.
+ *
+ * (c) Sebastian Bergmann <sebastian@phpunit.de>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace SebastianBergmann\CodeCoverage\Node;
+
+/**
+ * Recursive iterator for node object graphs.
+ */
+class Iterator implements \RecursiveIterator
+{
+    /**
+     * @var int
+     */
+    private $position;
+
+    /**
+     * @var AbstractNode[]
+     */
+    private $nodes;
+
+    /**
+     * @param Directory $node
+     */
+    public function __construct(Directory $node)
+    {
+        $this->nodes = $node->getChildNodes();
+    }
+
+    /**
+     * Rewinds the Iterator to the first element.
+     */
+    public function rewind()
+    {
+        $this->position = 0;
+    }
+
+    /**
+     * Checks if there is a current element after calls to rewind() or next().
+     *
+     * @return bool
+     */
+    public function valid()
+    {
+        return $this->position < count($this->nodes);
+    }
+
+    /**
+     * Returns the key of the current element.
+     *
+     * @return int
+     */
+    public function key()
+    {
+        return $this->position;
+    }
+
+    /**
+     * Returns the current element.
+     *
+     * @return \PHPUnit_Framework_Test
+     */
+    public function current()
+    {
+        return $this->valid() ? $this->nodes[$this->position] : null;
+    }
+
+    /**
+     * Moves forward to next element.
+     */
+    public function next()
+    {
+        $this->position++;
+    }
+
+    /**
+     * Returns the sub iterator for the current element.
+     *
+     * @return Iterator
+     */
+    public function getChildren()
+    {
+        return new self(
+            $this->nodes[$this->position]
+        );
+    }
+
+    /**
+     * Checks whether the current element has children.
+     *
+     * @return bool
+     */
+    public function hasChildren()
+    {
+        return $this->nodes[$this->position] instanceof Directory;
+    }
+}