protected function convertDom(\DOMNode $node)
    {
        $isArray = false;
        $current = array();
        $text = '';

        if ($node instanceof \DOMElement) {
            foreach ($node->attributes as $name => $attribute) {
                $current["_{$name}"] = $attribute->value;
            }
        }

        $parentTagName = $node instanceof \DOMElement ? $node->tagName : false;
        foreach ($node->childNodes as $childNode) {
            switch ($childNode->nodeType) {
                case XML_ELEMENT_NODE:
                    $tagName = $childNode->tagName;

                    if (in_array($tagName, $this->fieldTypeHashElements)) {
                        $current[$tagName] = $this->parseFieldTypeHash($childNode);
                    } elseif (!isset($current[$tagName])) {
                        if (isset($this->forceList[$parentTagName]) &&
                             in_array($tagName, $this->forceList[$parentTagName], true)) {
                            $isArray = true;
                            $current[$tagName] = array(
                                $this->convertDom($childNode),
                            );
                        } else {
                            $current[$tagName] = $this->convertDom($childNode);
                        }
                    } elseif (!$isArray) {
                        $current[$tagName] = array(
                            $current[$tagName],
                            $this->convertDom($childNode),
                        );
                        $isArray = true;
                    } else {
                        $current[$tagName][] = $this->convertDom($childNode);
                    }

                    break;

                case XML_TEXT_NODE:
                    $text .= $childNode->wholeText;
                    break;

                case XML_CDATA_SECTION_NODE:
                    $text .= $childNode->data;
                    break;
            }
        }

        $text = trim($text);

        if ($text !== '' && count($current)) {
            $current['#text'] = $text;
        } elseif ($text !== '') {
            $current = $text;
        } elseif (!count($current)) {
            return null;
        }

        return $current;
    }