Error creating Subreport using Java API

By: Albert Chan - albertchan
Error creating Subreport using Java API
2003-12-11 14:17
Hi,

I have trouble creating a report with a subreport that only contains a static text. Here is my code snippet:

--------------------------------------------------
// create design
JasperDesign jDesign = new JasperDesign();

// create subreport
JRDesignSubreport jSubreport = new JRDesignSubreport();
jSubreport.setUsingCache(true);
jSubreport.setRemoveLineWhenBlank(true);

// create Detail band
JRDesignBand jDetailBand = new JRDesignBand();
jDetailBand.setHeight(50);

// set subreport connection
JRDesignExpression jSubreportConnExp = new JRDesignExpression();
jSubreportConnExp.addParameterChunk( JRParameter.REPORT_CONNECTION );
jSubreportConnExp.setValueClass(java.sql.Connection.class);
jSubreport.setConnectionExpression(jSubreportConnExp);

// set Subreport expression
JRDesignExpression jSubreportExp = new JRDesignExpression();
jSubreportExp.setValueClass( java.io.InputStream.class );
//testsub only contains a static text
jSubreportExp.setText( "testsub.jasper" );
jSubreport.setExpression(jSubreportExp);

jDetailBand.addElement(jSubreport);

jDesign.setDetail(jDetailBand);
--------------------------------------------------


When I tried to compile the Jasper design, I got this error:

--------------------------------------------------
/db/dbdev/jwsdp-1_0_01/bin/DetailQMEPostETLReport.java:217: cannot resolve symbol
symbol : variable testsub
location: class DetailQMEPostETLReport
value = (java.io.InputStream)(testsub.jasper);
^
/db/dbdev/jwsdp-1_0_01/bin/DetailQMEPostETLReport.java:355: cannot resolve symbol
symbol : variable testsub
location: class DetailQMEPostETLReport
value = (java.io.InputStream)(testsub.jasper);
^
/db/dbdev/jwsdp-1_0_01/bin/DetailQMEPostETLReport.java:493: cannot resolve symbol
symbol : variable testsub
location: class DetailQMEPostETLReport
value = (java.io.InputStream)(testsub.jasper);
^
3 errors
QMEReport_getReportDesign(WA053, DetailQMEPostETLReport): dori.jasper.engine.JRException: Errors were encountered when compiling report expressions class file:
See error messages above.
java.rmi.RemoteException: JRException: dori.jasper.engine.JRException: Errors were encountered when compiling report expressions class file:
See error messages above.
--------------------------------------------------

Even if I set the Subreport expression to:
jSubreportExp.setValueClass( String.class )
I still get the same kind of error....


Any suggestions?

Eventually, I would need to connect the subreport to a datasource, which I have no idea how to do.
Can you give me any directions on where to find good docs or samples?

Thanks in advance,
al