how to rotate pages into landscape and page content should be in portrait iTextpdf

I'm trying to create a PDF document with more than 2 pages in portrait and others in landscape, I found that both page and text rotates to landscape I need to prevent page content rotation. am using following code

 Document document = new Document(PageSize.A4, 36, 36, 36, 72);
    PdfWriter writer = PdfWriter.getInstance(document, new 
    FileOutputStream(outPutDirectory + indexID + ".pdf"));
    writer.setPageEvent(new Orientation(orientation));
    document.open();
    XMLWorkerHelper.getInstance().parseXHtml(writer,document, new ByteArrayInputStream(parserXHtml(page.getPageContent()).getBytes()))
    document.close();

my expected result should be like this

Instead of using a page event, you have to change the page size.

For instance:

Document document = new Document(PageSize.A4);
PdfWriter writer = PdfWriter.getInstance(document, new 
FileOutputStream(outPutDirectory + indexID + ".pdf"));
document.open();
// Add some content in portrait
document.setPageSize(PageSize.A4.rotate());
document.newPage();
// Add some content in landscape
document.close();

Be aware of the fact that the page size only changes on the next page. The order of setPageSize() and newPage() is important.