John,
You got it. Thank you so much!
I did a local build with the changes you suggested and it is working now.
Is JasperReports using the SF bug tracker? Shall I open a ticket
there to get this correction included in next version?
Regards,
Edson
John Bindel wrote:
I can see that the reason for the error may be that the JRVerticalFiller
class, for example, creates a JRBasePrintPage in the
switch (whenNoDataType) statement. The JRHorizontalFiller does this as
well. You could probably replace the calls to "new JRBasePrintPage()"
in the fillers to "newPage()", which is defined in JRBaseFiller, and
which creates a base page or virtual page appropriately.
Cheers,
John
On Wed, Nov 09, 2005 at 12:23:26PM -0600, Edson Tirelli wrote:
Dear All,
I'm facing a very strange problem here and I couldn't find anything
related in the mailing list archive. Google also didn't helped, so you
are my hope! :)
I have a report with the following characteristics:
DataSource: JRResultSetDataSource
Using virtualizer: YES (JRFileVirtualizer)
Has subreports: YES (2 subreports)
When I call:
JasperRunManager.runReportToPdfStream(reportStream, output, parameters,
datasource);
IF the datasource returns NO rows, I get the following error:
[java] Caused by: java.lang.ClassCastException:
net.sf.jasperreports.engine.base.JRBasePrintPage
[java] at
net.sf.jasperreports.engine.fill.JRBaseFiller.registerSubfiller(JRBaseFiller.java:1726)
[java] at
net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:728)
[java] at
net.sf.jasperreports.engine.fill.JRFillSubreport.run(JRFillSubreport.java:427)
[java] at java.lang.Thread.run(Thread.java:595)
[java] [ERROR] Java Result: 1
The strange situation is that I made several experiences trying to
figure out under witch conditions I get the error, and the error occur
only when above conditions are met: I use a virtualizer, in a report
that contains subreports, with a result set data source that returns no
rows.
If I turn off the virtualizer, everything works fine. If I run the
report removing the subreports, everything works fine. If I submit a
query that returns at least one row to the datasource, everything works
fine.
I don't know Jasper internals, so, I gave a quick look at the
classes presented in the stack trace and there is a forced cast there
used when virtualization is true, but I couldn't figure out why it is
throwing the class cast exception.
I'll try to create a self contained test to reproduce the problem,
but until there, if any of you has any suggestions, it is greatly
appreciated.
Thank you,
Edson
---
Edson Tirelli
Auster Solutions do Brasil
@ www.auster.com.br
+55 11 5096-2277 / +55 11 9218-4151
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---
Edson Tirelli
Auster Solutions do Brasil
@ www.auster.com.br
+55 11 5096-2277 / +55 11 9218-4151
-------------------------------------------------------
SF.Net email is sponsored by:
Tame your development challenges with Apache's Geronimo App Server. Download
it for free - -and be entered to win a 42" plasma tv or your very own
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