Java Programming

Hi all,

I'm using iText to build pdf files.
In my process, I'm building lot of documents (suppose doc1.pdf, doc2.pdf..... doc1000.pdf).

Each document contains 2 pages (recto-verso if printed individually).

Now, I have to build a unique pdf file, assembling all the docs with the following rules ( constraints given for printing ):
The final doc size is twice.
On the first page, the 1st pages of doc 1 and 2,
On the second page, the 2nd pages of doc 1 and 2,
On the third page, the 1st pages of doc 3 and 4,
On the fourth page, the 2nd pages of doc 3 and 4,
and so on.

I made a prog and you will find after the source code.
My problem is a problem of size.
Each document is 7Mo, so when assembling 100 docs, the program stops at the "document.close().
Assembling 40 is ok, more is a problem.

I suppose ther is buffer and I'm running out of it. Is there a solution to write directly on disk so that I won't have a problem of size ?

Thanks if you could help.



Document document = new Document(finalPageSize, 0, 0, 0, 0);
PdfWriter writer = PdfWriter.getInstance( document, new FileOutputStream(finalFileName) );
document.open();
PdfContentByte cb = writer.getDirectContent();

int current = startNo;

for (int sheetNo=0; sheetNo<nbSheets; sheetNo++){
// Pages Recto
document.newPage();
for (int pageNo=1; pageNo<=2; pageNo++){

PdfImportedPage page;
String fileName = new String( pageComponent + (current+pageNo-1) + ".pdf");

PdfReader reader = new PdfReader(pdfFilesRep + fileName);
page = writer.getImportedPage(reader, 1);

Rectangle pageArea = reader.getPageSize(1);
float pageWidth = pageArea.getWidth();
float pageHeight = pageArea.getHeight();
float positionX = position[pageNo-1][0] * coefCmToPoints;
float positionY = position[pageNo-1][1] * coefCmToPoints;
cb.addTemplate(page, 1f, 0, 0, 1f, positionX, positionY);
reader.close();

}

// Pages Verso
document.newPage();
for (int pageNo=1; pageNo<=2; pageNo++){

PdfImportedPage page;
String fileName = new String( pageComponent + (current+pageNo-1) + ".pdf");

PdfReader reader = new PdfReader(pdfFilesRep + fileName);
page = writer.getImportedPage(reader, 2);

Rectangle pageArea = reader.getPageSize(1);
float pageWidth = pageArea.getWidth();
float pageHeight = pageArea.getHeight();
float positionX = position[pageNo-1][0] * coefCmToPoints;
float positionY = position[pageNo-1][1] * coefCmToPoints;
cb.addTemplate(page, 1f, 0, 0, 1f, positionX, positionY);
reader.close();

}
current += 2;
}
document.close();