Antonio Manuel Muñiz wrote:
> Hello.
> 
> I see in the doc that is possible to concatenate two pdf files, but the 
> files must exist as file (in the file system)

No, they don't have to exist as a file.
There are examples on 1t3xt.info/examples/
where a ByteArrayOutputStream is used and PdfReader is created with
a byte[]. So replace:

PdfWriter.getInstance(document, new FileOutputStream("myfile.pdf"));

with

ByteArrayOutputStream baos = new ByteArrayOutputStream();
PdfWriter.getInstance(document, baos);

And then later on replace:

PdfReader reader = new PdfReader("myfile.pdf");

with

PdfReader reader = new PdfReader(baos.toByteArray());

> Is possible to concatenate two Document objects? I have not found any 
> reference in the documentation.

Look closer next time ;-)
-- 
This answer is provided by 1T3XT BVBA
http://www.1t3xt.com/ - http://www.1t3xt.info

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