As promised, this is the procedure I use to create a 27.000+ page document
really fast using an existing 1-page PDF document with a form.
My class Letter extends PdfPageEventHelper.
In the onOpenDocument method
1. I read the existing PDF and retrieve the fields and their coordinates
I store these coordinates for later use.
2. I read the page into a PdfImportedPage and store this page in a
member variable 'page'
In the onStartPage method, I do:
writer.getDirectContent().addTemplate(page, 0, 0);
In the main method, I go through the 5 steps of document creation:
1. Document document = new Document();
(in your case, it would probably be a good idea to retrieve the page
size from the original PDF)
2. PdfWriter writer = PdfWriter.getInstance(document, new
FileOutputStream("new.pdf"));
Letter letter = new Letter();
writer.setPageEvent(letter);
3. document.open();
4. I add content
I loop over all the records in my database and I add it to the PDF
using ColumnText
the coordinates used in the ColumnText objects, are the ones retrieved
in the onOpenDocument method.
After each record, I do document.newPage();
I don't worry about the 'template', the imported page is added
automatically in the page event.
5. document.close();
There are other ways to do it, and the book will give you
another example using setField and setFieldCache, but
the procedure described above is faster because it cuts
a lot of corners.
best regards,
Bruno
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