NullPointer while loading jrxml file with DynamicReport object

Question

I am trying to load a JasperReports jrxml template to my DynamicReport object but I am getting a null pointer without knowing from where it comes.

The code practically is like this:

DynamicReport dr = new DynamicReport();
DynamicReportBuilder drb = new DynamicReportBuilder();
......
drb.setTemplateFile("styles/myreport.jrxml");
dr = drb.build();

Then I call

 JasperPrint jp = DynamicJasperHelper.generateJasperPrint(dr, new ClassicLayoutManager(), resultSetDataSource);

The error is this:

java.lang.NullPointerException
at ar.com.fdvs.dj.core.DynamicJasperHelper.generateJasperDesign(DynamicJasperHelper.java:200)
at ar.com.fdvs.dj.core.DynamicJasperHelper.generateJasperReport(DynamicJasperHelper.java:535)
at ar.com.fdvs.dj.core.DynamicJasperHelper.generateJasperReport(DynamicJasperHelper.java:518)
at ar.com.fdvs.dj.core.DynamicJasperHelper.generateJasperPrint(DynamicJasperHelper.java:283)
at ar.com.fdvs.dj.core.DynamicJasperHelper.generateJasperPrint(DynamicJasperHelper.java:236)

Does anyone has any idea?

ps: I am using iReport 5 (tried even with 4) with DynamicJasper 3.1.8.

Answer 1

DynamicJasper And JasperReport needs to be compatible with each other, i think that's the problem with you.

Please find below compatibilities:

DJ 5.x works with JasperReposrts 4.6+ (and 5.0+, 5.1+ and 5.2) and needs JDK 1.6
DJ 4.x workrs with JasperReports 4.1 to 4.5.x
DJ 3.0.5 works with JR 3.5 up to 4.0

Note: Make sure Your jrxml is compiled with Jasper version.