NullPointerException when adding table to document

[KSchaeuble (at) netzgiganten.de]

I think I could narrow it down a bit though I'm still clueless, what is 
excactly happening.
I'm adding a Paragraph to a cell like this:

Paragraph para = (Paragraph)element.render(style);
contentCell.addElement(para);

The render-method returns an Element, but if I ask element.render(style) 
what its type is it correctly answers it is a Paragraph. I can also get 
the content which is also correct.
But when I use the above I get in the end:

DocumentException: 
java.lang.NullPointerException
        at com.lowagie.text.Phrase.leading(Unknown Source)
        at com.lowagie.text.pdf.ColumnText.goComposite(Unknown Source)
        at com.lowagie.text.pdf.ColumnText.go(Unknown Source)
        at com.lowagie.text.pdf.PdfPRow.calculateHeights(Unknown Source)
        at com.lowagie.text.pdf.PdfPRow.getMaxHeights(Unknown Source)
        at com.lowagie.text.pdf.PdfPTable.calculateHeights(Unknown Source)
        at com.lowagie.text.pdf.PdfPTable.setTotalWidth(Unknown Source)
        at com.lowagie.text.pdf.ColumnText.goComposite(Unknown Source)
        at com.lowagie.text.pdf.ColumnText.go(Unknown Source)
        at com.lowagie.text.pdf.ColumnText.go(Unknown Source)
        at com.lowagie.text.pdf.PdfDocument.addPTable(Unknown Source)
        at com.lowagie.text.pdf.PdfDocument.add(Unknown Source)
        at com.lowagie.text.Document.add(Unknown Source)
        at pmt.reporting.basereporting.ReportGenerator.generateReport(
ReportGenerator.java:73)

If I do the following I get no exception:
Paragraph para = (Paragraph)element.render(style);
contentCell.addElement(new Paragraph(para.content()));

So I guess something gets lost somehow.
Please help I'm really despairing of that!




KSchaeuble (at) netzgiganten.de 
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25.08.2006 10:10
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Subject
[iText-questions] NullPointerException when adding table to document






I'm trying to piece a report together by creating several parts in 
different classes. I first ran this code locally and had no prblems 
creating the Pdf. When I now integrate it into my web-app and use a real 
object I'm getting an exception while generating the document:
I tried to hunt it down but now am rather clueless where else to look. I 
already checked that the text I'm getting from the object is ok.

This is the exception I'm getting: 
DocumentException: 
java.lang.NullPointerException
        at com.lowagie.text.pdf.PdfChunk.<init>(Unknown Source)
        at com.lowagie.text.pdf.ColumnText.addWaitingPhrase(Unknown 
Source)
        at com.lowagie.text.pdf.ColumnText.go(Unknown Source)
        at com.lowagie.text.pdf.PdfPRow.calculateHeights(Unknown Source)
        at com.lowagie.text.pdf.PdfPRow.getMaxHeights(Unknown Source)
        at com.lowagie.text.pdf.PdfPTable.calculateHeights(Unknown Source)
        at com.lowagie.text.pdf.PdfPTable.setTotalWidth(Unknown Source)
        at com.lowagie.text.pdf.ColumnText.goComposite(Unknown Source)
        at com.lowagie.text.pdf.ColumnText.go(Unknown Source)
        at com.lowagie.text.pdf.PdfPRow.calculateHeights(Unknown Source)
        at com.lowagie.text.pdf.PdfPRow.getMaxHeights(Unknown Source)
        at com.lowagie.text.pdf.PdfPTable.calculateHeights(Unknown Source)
        at com.lowagie.text.pdf.PdfPTable.setTotalWidth(Unknown Source)
        at com.lowagie.text.pdf.ColumnText.goComposite(Unknown Source)
        at com.lowagie.text.pdf.ColumnText.go(Unknown Source)
        at com.lowagie.text.pdf.ColumnText.go(Unknown Source)
        at com.lowagie.text.pdf.PdfDocument.addPTable(Unknown Source)
        at com.lowagie.text.pdf.PdfDocument.add(Unknown Source)
        at com.lowagie.text.Document.add(Unknown Source)
        at pmt.reporting.basereporting.ReportGenerator.generateReport(
ReportGenerator.java:57)

And this is where I add my table. The render-method returns a PdfPTable as 

expected:

List firstElements = builder.getFirstElements();
for (Iterator iter = firstElements.iterator(); iter.hasNext();) {
        ReportSection firstElement = (ReportSection) iter.next();
        PdfPTable table = new 
PdfPTable((PdfPTable)firstElement.render(style));
        document.add(table);
} 

I know my description is rather misty but maybe you can give me at least 
an idea where else to look.

Thanks a lot!
Karola

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-------------------------------------------------------------------------
Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre-integrated technology to make your job easier
Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
_______________________________________________
iText-questions mailing list
iText-questions (at) lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/itext-questions