first commit - working

vendor/phar-io/manifest/src/xml/ElementCollection.php

@@ -0,0 +1,61 @@
+<?php declare(strict_types = 1);
+/*
+ * This file is part of PharIo\Manifest.
+ *
+ * (c) Arne Blankerts <arne@blankerts.de>, Sebastian Heuer <sebastian@phpeople.de>, 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 PharIo\Manifest;
+
+use DOMElement;
+use DOMNodeList;
+
+abstract class ElementCollection implements \Iterator {
+    /** @var DOMElement[] */
+    private $nodes = [];
+
+    /** @var int */
+    private $position;
+
+    public function __construct(DOMNodeList $nodeList) {
+        $this->position = 0;
+        $this->importNodes($nodeList);
+    }
+
+    #[\ReturnTypeWillChange]
+    abstract public function current();
+
+    public function next(): void {
+        $this->position++;
+    }
+
+    public function key(): int {
+        return $this->position;
+    }
+
+    public function valid(): bool {
+        return $this->position < \count($this->nodes);
+    }
+
+    public function rewind(): void {
+        $this->position = 0;
+    }
+
+    protected function getCurrentElement(): DOMElement {
+        return $this->nodes[$this->position];
+    }
+
+    private function importNodes(DOMNodeList $nodeList): void {
+        foreach ($nodeList as $node) {
+            if (!$node instanceof DOMElement) {
+                throw new ElementCollectionException(
+                    \sprintf('\DOMElement expected, got \%s', \get_class($node))
+                );
+            }
+
+            $this->nodes[] = $node;
+        }
+    }
+}