just use Pdfviewer.setContent with an AMedia

Pdfviewer.setContent(
    new AMedia("some.pdf", "pdf", "application/pdf", 
               new File("/home/ubuntu/data/Allergy/EDI837PISASegment.pdf"), true));

just use Pdfviewer.setContent with an AMedia

Pdfviewer.setContent(
    new AMedia("some.pdf", AMedia("EDI837PISASegment.pdf", "pdf", "application/pdf", 
               new File("/home/ubuntu/data/Allergy/EDI837PISASegment.pdf"), true));

just use Pdfviewer.setContent with an AMedia (I assume you already use AMedia for download, so there's almost no difference)

Pdfviewer.setContent(
    new AMedia("EDI837PISASegment.pdf", "pdf", "application/pdf", 
               new File("/home/ubuntu/data/Allergy/EDI837PISASegment.pdf"), true));