Changing content type of xml file to pdf

Question

Hello,
I have an xml file (extension is *.xdp) which can locally be opened with Adobe Reader and displays as a regular pdf file. Adobe has a technology that allows xml to be merged with a pdf shell, and thus populating the pdf file with the values retrieved from the xml file.
My issue is that I want this to be done on an application server level (jboss in particular). In a servlet, I stream the xml file for the contents to be printed out within a browser (IE). I specify the content type to be application/pdf, however, the data is not being displayed within Adobe Reader, but rather as a regular xml file.
Any help is greatly appreciated. Here is the code below:
response.setHeader("Pragma", "public");
response.setHeader("Cache-Control", "max-age=30");
response.setContentType("application/pdf");
ServletOutputStream out = response.getOutputStream();
byte[] fileBytes = readFile();
out.write(fileBytes);

Answer 1

Yes, the xml does contain a reference to the shell pdf. This works fine if I do so manually (open the xml file using Adobe Reader). However, through a browser, it seems that the forced content type is completely ignored:
<?xml version="1.0"?>
<?xfa generator="XFA2_0" APIVersion="1.4.4127.0"?>
<xdp:xdp xmlns:xdp="http://ns.adobe.com/xdp/">
<xfa:datasets xmlns="" xmlns:xfa="http://www.xfa.org/schema/xfa-data/1.0/">
<xfa:data>
<DocRoot>
<Cldemographics<Cldatecreated>7/21/05</Cldatecreated...
</DocRoot>
</xfa:data>
</xfa:datasets>
<pdf href="/opt/jboss-tomcat-server-build-4.0.0-2/.../pdfShell/Shell.pdf"
xmlns="http://ns.adobe.com/xdp/pdf/"/>
</xdp:xdp>