XFDF Annotations

[Patrick Herber]

Hello

I'm trying to use PDFBox for importing annotations from an XFDF file 
into a PDF Document.
I found the class ImportXFDF which seemed appropriate but discovered 
that was "only" able to import fields (AcroForm). I also find some other 
limitation in other classes (FDFAnnotation, FDFDicionary) which were 
only able to deal with text annotations.
I allowed myself to integrate into the ImportXFDF's importFDF method 
also the capability to import annotations (in case it will work I will 
also send you all the changes I've done in this and in the other classes):

        ...
        List<FDFAnnotation> fdfAnnotations = 
fdfDocument.getCatalog().getFDF().getAnnotations();
        if ( fdfAnnotations != null)
        {
            Map<Integer, List<PDAnnotation>> pdAnnotations = 
createPDAnnotations(fdfAnnotations);
            List<PDPage> pages = 
pdfDocument.getDocumentCatalog().getAllPages();
            for ( int i = 0; i < pages.size(); i++ )
            {
                List<PDAnnotation> annotations = pdAnnotations.get(i);
                if ( annotations != null )
                {
pages.get(i).setAnnotations(annotations);
                }
            }
        }
        ...

At the end of this method the pdfDocument pages are filled with the 
relative annotations. However, if I perform a test in the output file 
there is no annotation:

        PDDocument pdfDocument = PDDocument.load(pdfFile);
        FDFDocument fdfDocument = FDFDocument.loadXFDF(xfdfFile);
        ImportXFDF importFDF = new ImportXFDF();
        importFDF.importFDF(pdfDocument, fdfDocument);
        pdfDocument.save(new FileOutputStream(dest));

I wonder therefore, if I'm proceeding in the right way. Is this the 
correct way to modify the content of the document pages (in this case 
adding annotations)?

Thanks for your support and best regards,
Patrick