(Sorry I think have sent an earlier email again by mistake - the fun of a
rubbish webmail)
My question was whether or not iText had a tool/utility for concatenating
ByteArrayOutputStreams - to make it that little bit easier for a lazy developer
;)
I tried to do this earlier and found that only the last byte array to be copied
would be displayed in the produced pdf.
byte[] cover = cFs.cpbaos.toByteArray();
byte[] toc = cFs.tocbaos.toByteArray();
byte[] content = cFs.cbaos.toByteArray();
byte[] pdf = new byte[cover.length+toc.length+content.length];
System.arraycopy(cover, 0, pdf, 0, cover.length);
System.arraycopy(toc, 0, pdf, cover.length, toc.length);
System.arraycopy(content, 0, pdf, cover.length+toc.length, content.length);
I ended up using PdfReader and PdfCopy and it worked well. Although I do still
have a question in regards to concatenating documents. I want to be able to
have the toc link through to the headings that they reference. I have done this
successfully when implementing it in a document with no need to concatenate
with another (when i tried the reordering example). However due to existing
codebase I still want to be able to do this whilst concatenating a toc
ByteArrayOutputStream and contents ByteArrayOutputStream. I have the following:
In the toc ByteArrayOutputStream:
Paragraph headingParagraph = new Paragraph();
Anchor pageReference = new Anchor(heading.getText());
pageReference.setReference("#"+heading.getText());
headingParagraph.add(pageReference);
document.add(headingParagraph);
In the content ByteArrayOutputStream:
Paragraph headingParagraph = new Paragraph(headingTitle);
Anchor headingReference = new Anchor();
headingReference.setName(headingTitle);
headingParagraph.add(headingReference);
document.add(headingParagraph);
(headingTitle is used to set the heading text that the toc uses)
When the pdf is produced the pointed cursor does display over the table of
contents headings but doesn't appear to know what it references. Is this an
issue with concatenating the two Documents or with how I have implemented it?
Thanks again!
-----Original Message-----
From: Katrina Walker
Sent: Wed 18/03/2009 09:15
To: [email protected]
Subject: Re: Concatenating two Document objects before creating the PDF file
My preferred way would be to create ByteArrayOutputStreams and then concatenate
them. Do you provide any tools with iText for concatenating the
ByteArrayOutputStreams?
I have seen in the book that you use Concat.main(arguments) where arguments is
a String array for the pdf file names - so as far as I understand I wouldn't be
able to use that when working with ByteArrayOutputStreams.
Alternatively in the book I have seen how you can use PDFReaders and PDFCopy
but I can only see how that does it on a page by page basis.
Thanks for your help.
>There are different ways to achieve this.
>You could create the PDFs in memory by writing to a
>ByteArrayOutputStream instead of to a FileOutputStream, then when you
>are finished concatenate them.
>Or you could add the TOC at the end of the file, and then reorder the
>pages as explained in the book: http://1t3xt.be/?X000012
Katrina Walker wrote:
> Hi,
>
> I am trying to produce a pdf with a table of contents at the start of
> the pdf. The problem I have is that the table of contents can only be
> populated once all the content has been processed (due to existing
> codebase). I am currently using a com.lowagie.text.Document for the
> table of contents and then a com.lowagie.text.Document for the
> content. I was wondering if there is a way to concatenate the two
> Documents and then create the PDF as opposed to creating two PDF's and
> concatenating them.
>
> Thanks
> Kat Walker
>
>
>
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