WordpressImporter::createItemObject PHP Method

    function createItemObject(DOMNode $item)
    {
        $type = $item->getElementsByTagName('post_type')->item(0);
        # "page", "post", "attachment"
        switch ($type ? $type->nodeValue : '?') {
            case 'post':
                return new WPPost();
            case 'page':
                return new WPPage();
            case 'attachment':
                return new WPAttachment();
        }
        return null;
    }