Jasper java.lang.ClassCastException.

[yazanki]

I'm developing a new project JSF2.0 with MAVEN, PRIMEFACES, HIBERNATE and SPRING SECURITY WEB, when i try generate a report i get this error:

 

java.lang.ClassCastException: cannot assign instance of net.sf.jasperreports.engine.base.JRBaseTextField to field net.sf.jasperreports.engine.base.JRBaseParagraph.paragraphContainer of type net.sf.jasperreports.engine.JRParagraphContainer in instance of net.sf.jasperreports.engine.base.JRBaseParagraph

 

Any idea?

[Ankur Gupta]

Hi,

Probably this happens when you try to use an older version of Jasper Report Jar file, 

Are you using iReport/ Jasper Soft studio ? If yes then what version are you using?

Probably there is a version mismatch .

 

Hope that this helps
 

Thanks
Ankur Gupta

[yazanki]

i'm using jaspersoft 5.5.0 and netbeans ide 7.4 with ireport plugin for 5.5.0

[yazanki]

this is my libs... i'm using a maven project.

[yazanki]

   try {

            FacesContext facesContext = FacesContext.getCurrentInstance();

            facesContext.responseComplete();

            ServletContext scontext = (ServletContext) facesContext.getExternalContext().getContext();

            JasperPrint jasperPrint = JasperFillManager.fillReport(scontext.getRealPath("/WEB-INF/reports/report.jasper"), parametros, new JRBeanCollectionDataSource(listaOler));

 

            ByteArrayOutputStream baos = new ByteArrayOutputStream();

 

            JRPdfExporter exporter = new JRPdfExporter();

            exporter.setParameter(JRExporterParameter.JASPER_PRINT, jasperPrint);

            exporter.setParameter(JRExporterParameter.OUTPUT_STREAM, baos);

            exporter.exportReport();

            byte[] bytes = baos.toByteArray();

 

            if (bytes != null && bytes.length > 0) {

                HttpServletResponse response = (HttpServletResponse) facesContext.getExternalContext().getResponse();

                response.setContentType("application/pdf");

                response.setHeader("Content-disposition", "inline; filename="olerite.pdf"");

                response.setContentLength(bytes.length);

                ServletOutputStream outputStream = response.getOutputStream();

                outputStream.write(bytes, 0, bytes.length);

                outputStream.flush();

                outputStream.close();

            }

        } catch (Exception e) {

            e.printStackTrace();

        }

[Ankur Gupta]

Hi,

The ClassCastException and the duplicate component warning indicate that you have two JasperReports jars on your classpath.Please check for the duplicate jars. If this is not the issue then youare probably using a Static Text field in your report where you need to be using a Text Field.

 

Hope that this helps

 

Thanks
Ankur Gupta
http://ankurthetechie.blogspot.in/