[iText-questions] NullPointer while using PdfReader

[Nathan Frank]

Title: Message

Hello,

 

I am experiencing a strange problem.  I am using PdfReader to append a PDF file to my PDF document. I am using a servlet on IBM Websphere application server to generate this PDF, and return it to a browser.  We are testing this on many different servers, which may or may not be configured the same. It works on some servers, and not on others. I have included a section of code, and part of the stack trace. I was just wondering if anyone has seen similar issues to this or has suggestions for fixing the problem.  I was also wondering if I am doing something wrong in my code, or if there is a better/safer way to do this.

 

thank you,

Nathan

 

    if (debugLevel == 0 || ((debugLevel & 2) != 0)) {
      document.newPage();
      /* append  page */
      /* start on Odd page so that the prior form is on one printable page */
      if (writer.getPageNumber() % 2 == 0)
      {
        document.add(Chunk.NEWLINE);
        document.newPage();
      }
    

      /* bookmark */
      PdfDestination dest = new PdfDestination(PdfDestination.FITB);
      PdfOutline outline = new PdfOutline(cb.getRootOutline(), dest, "New Page");
      outline.setOpen(false);
      

      /* import PDF */
      InputStream is = getContentAsStream();
      PdfReader reader = new PdfReader(is);
      for (int i = 1; i <=reader.getNumberOfPages();i++) {
        PdfImportedPage page = writer.getImportedPage(reader, i);
        cb.addTemplate(page, 0f,0f);
        if (i < reader.getNumberOfPages()) document.newPage();
      }
      is.close();

    }
    
    document.close();

 

[Servlet.LOG]: action: Connection.process: java.lang.NullPointerException
 at com.lowagie.text.pdf.OutputStreamCounter.write(OutputStreamCounter.java(Compiled Code))
 at com.lowagie.text.pdf.PRStream.toPdf(PRStream.java(Compiled Code))
 at com.lowagie.text.pdf.PdfIndirectObject.writeTo(PdfIndirectObject.java(Compiled Code))
 at com.lowagie.text.pdf.PdfWriter$PdfBody.add(PdfWriter.java(Compiled Code))
 at com.lowagie.text.pdf.PdfWriter$PdfBody.add(PdfWriter.java(Inlined Compiled Code))
 at com.lowagie.text.pdf.PdfWriter.addToBody(PdfWriter.java(Inlined Compiled Code))
 at com.lowagie.text.pdf.PdfReaderInstance.writeAllVisited(PdfReaderInstance.java(Compiled Code))
 at com.lowagie.text.pdf.PdfReaderInstance.writeAllPages(PdfReaderInstance.java(Compiled Code))
 at com.lowagie.text.pdf.PdfWriter.addSharedObjectsToBody(PdfWriter.java(Compiled Code))
 at com.lowagie.text.pdf.PdfWriter.close(PdfWriter.java:1178)
 at com.lowagie.text.pdf.PdfDocument.close(PdfDocument.java:934)
 at com.lowagie.text.Document.close(Document.java(Compiled Code))
 at xxxxx.pdf.FormattedOriginalWageScheduleArt8.writePdf(FormattedOriginalWageScheduleArt8.java:188)
 etc...