I gave it a try but I'm stuck.
I obtained the cover-page PRAcroForm via PdfReader.getAcroForm. How can i add/set it into the stamper?
Thank you all in advance.
Filipe Fedalto
Cansado dos disparates e despautérios da República?
Quer um basta nas desventuras de nossos governantes?
Acesse http://www.monarquia.org.br e http://www.brasilimperial.org.br
e saiba mais a respeito.
On 23/05/06, Filipe Fedalto <
[EMAIL PROTECTED]> wrote:
Paulo,Thanks for answering me.I tried to use PdfStamper, but there was one catch which I couldn't figure out how to solve.The cover Page has a pre-defined blank signature field and some legal information about digital signature and such. This field is there so the users can sign the document later.Then I discovered that some information was lost unless I copied the acroform via the copyAcroForm of PdfCopy class. I don't know what is that lost information, but I guessed it was somehow related to this signature field.So, if there is some way to copy the acro form using PdfStamper, then it's alright. Well... I'll give it a try tomorrow morning...Thank you very much.Regards,Filipe Fedalto
On 23/05/06, Paulo Soares <[EMAIL PROTECTED] > wrote:Just use PdfStamper, you can insert a blank page there and import the cover
page.
Paulo
----- Original Message -----
From: "Filipe Fedalto" <[EMAIL PROTECTED]>
To: < [email protected]>
Sent: Tuesday, May 23, 2006 9:32 PM
Subject: [iText-questions] Algorithm problem - use of PdfCopy and PdfStamper
Hi all,
I am developing a program to Brazilian Post Mail Office "ECT - Empresa
Brasileira de Correios e Telégrafos". Congratulations to Bruno and Paulo.
You may add ECT to your list of huge companies which use iText. I'm proud of
trying to spread iText use inside this company.
Well, I'm developing a small program to process existing PDF documents. This
program should process corporate documents adding a Cover-Page before their
first page and adding a watermark in the upper right corner of each other
page except the Cover-Page itself. Pretty simple, huh? These three documents
(original document, standard cover-page and standard watermark) are all PDF
files themselves. Also, the cover-page and the watermark-page are
pre-determined in the program preferences. The only dinamic input is the
original document.
So I actually and successfully completed the first version of the program.
It worked pretty fine in the first developer tests. However, when I tried
and processed real-life documents I noticed a very high memory usage as well
as a really long document-processing time. These real-life documents have
sizes ranging from 1Mb to 10Mb each.
After that I studied my program so I could discover any performance issues.
As a matter of fact, I realized that there was indeed a problem in the
approach I've taken.
Here are two methods that implement respectively the "Add Cover-Page" and
"Add Watermark" features:
private void addCoverPage(PdfReader documentPDF, String tempFileName)
throws IOException,
DocumentException {
// Number of Pages
int numPages = documentPDF.getNumberOfPages();
// Create PdfCopy
Document document = new Document();
PdfCopy copy = new PdfCopy(document, new
FileOutputStream(tempFileName));
document.open();
// Adds Cover-Page to the copy
PdfImportedPage coverPage = copy.getImportedPage(coverPDF, 1);
copy.addPage(coverPage);
// Adds the original document's pages to the copy
for (int i = 1; i <= numPages; i++) {
PdfImportedPage currentPage = copy.getImportedPage(documentPDF,
i);
copy.addPage(currentPage);
}
// Copies acro form
copy.copyAcroForm(coverPDF);
document.close();
copy.close();
documentPDF.close();
// Deletes original file and renames tempfile into the original
filename
moveTempFileIntoOriginalFile(tempFileName, fileName);
}
private void addWatermark(PdfReader documentPDF, String tempFileName)
throws FileNotFoundException,
DocumentException, IOException {
// Number of Pages in original document
int numPages = documentPDF.getNumberOfPages();
// Gets PdfStamper
PdfStamper stamper = new PdfStamper(documentPDF, new
FileOutputStream(tempFileName));
// Retrieves the watermark page from the watermark pdf file
PdfImportedPage watermarkPage = stamper.getImportedPage(watermark,
1);
Rectangle watermarkSize = watermark.getPageSize(1);
// Adds the watermark
PdfContentByte content = null;
PdfContentByte contentOver = null;
for (int i = 2; i <= numPages; i++) {
// Adds the watermark into the top right corner of each page
PdfContentByte pageContentOver = stamper.getOverContent(i);
Rectangle pageSize = documentPDF.getPageSizeWithRotation(i);
pageContentOver.addTemplate(watermarkPage, pageSize.width () -
watermarkSize.width(), pageSize.height()
- watermarkSize.height());
}
stamper.close();
documentPDF.close();
// Deletes original file and renames tempfile into the original
filename
moveTempFileIntoOriginalFile(tempFileName, fileName);
}
Ok. So I use PdfCopy to create a new document (call doc #2) and copy the
cover-page and all original document's (call doc #1) pages into it. I need a
PdfReader to read the cover page and another PdfReader to read the Original
Document. The result is the original document with a standard cover-page
inserted. Then I use PdfStamper to add the watermark sign into all pages.
Note that PdfStamper will read from doc #2 and will be generating a doc #3.
The problem is that this watermark has to be added to the document resulting
from the PdfCopy process. So, after adding the cover-page to the document,
PdfCopy creates a new document. Therefore, I use a new PdfReader to read
this new document produced by PdfCopy. Then I use PdfStamper to add the
watermark, generating the new doc #3.
If it sounds confusing, let's put it simple: The problem is that I must read
a document (doc 1) to add a cover-page. This process generates a new
document (doc 2). Since I also must add a watermark, I read this document
(doc 2) and create a new document again (doc 3).
I also noted that the major performance issues were at the PdfReader
creation process. So, my program is twice as slow because I must read the
document twice. After that I tried a new approach. This time my intention is
to find some way to read the original document and add the cover-page and
watermark in the same process, so I can generate only one final file. The
problem is that I can't find a way to add a cover-page (and copy it's
acroform into the new document) and add the watermark into all pages using
the same process. The more I study iText API the less I can find it.
At last, is there any way to use the same process(PdfCopy, PdfWriter or
PdfStamper) to add both cover-page and watermark (from differente PDF files)
into some original file? What can I do so as not to PdfRead the document
twice?
I'm sorry for this really long post.
Thank you all in advance,
--
Filipe Fedalto
Cansado dos disparates e despautérios da República?
Quer um basta nas desventuras de nossos governantes?
Acesse http://www.monarquia.org.br e http://www.brasilimperial.org.br
e saiba mais a respeito.
-------------------------------------------------------
All the advantages of Linux Managed Hosting--Without the Cost and Risk!
Fully trained technicians. The highest number of Red Hat certifications in
the hosting industry. Fanatical Support. Click to learn more
http://sel.as-us.falkag.net/sel?cmd=lnk&kid=107521&bid=248729&dat=121642
_______________________________________________
iText-questions mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/itext-questions
--
Filipe Fedalto
Cansado dos disparates e despautérios da República?
Quer um basta nas desventuras de nossos governantes?
Acesse http://www.monarquia.org.br e http://www.brasilimperial.org.br
e saiba mais a respeito.
