JavaBean DataSource doesn't get passed to the sub-sub-report

         

         JRDataSource javaBeansKapitelDS = new JRBeanCollectionDataSource(BeanFactory.generateKapitelCollection());

         jasperReport = JasperCompileManager.compileReport("JRXML/Subreports.jrxml");

         jasperUnterkapitelReport = JasperCompileManager.compileReport("JRXML/Subreports_subreport1.jrxml");

         jasperEntryReport = JasperCompileManager.compileReport("JRXML/Subreports_subreport1_subreport1.jrxml");

 

         params.put("SUB_DATASOURCE", BeanFactory.generateUnterKapitelCollection());

         params.put("SUB_SUB_DATASOURCE", BeanFactory.generateEntryCollection());

         

         jasperPrint = JasperFillManager.fillReport(jasperReport, params, javaBeansKapitelDS);

         JasperExportManager.exportReportToPdfFile(jasperPrint, "output/TestJAVABeansDS.pdf");

 

 

In the main report i have a report, which has a subreport, which in turn has its own subreport. In the main report i set the Datasource of the subreport as DataSource Expression "new net.sf.jasperreports.engine.data.JRBeanCollectionDataSource($P{SUB_DATASOURCE})" and works just fine!

 

In the subreport i tried doing the same thing for the subsubreport (new net.sf.jasperreports.engine.data.JRBeanCollectionDataSource($P{SUB_SUB_DATASOURCE})) but i can't pass the SUB_SUB_DATASOURCE parameter from the main report to the subreport in order to use it there. If i define in the main report a parameter for the subreport:

Fill 1: exception

net.sf.jasperreports.engine.JRRuntimeException: net.sf.jasperreports.engine.JRException: Error retrieving field value from bean :

... 

 

I'm using the latest jasper reports library -5.5.1

 

So my question is: how do i pass to the subreport the JavaBeansDS in order to use it there for the subsubreport?

 

Thanks a lot for your time!

Alex