Compiling report: Nullpointer exception

[christiaan_se]

Hi,

we are migrating from version 1.2.6 to 1.3.3. When we try to compile a JasperDesign which was stored in 1.2.6 using JRSaver.saveObject() (to save the report to a stream) we get the following Nullpointer exception. Is this a bug or should we use a different approach?:

 

java.lang.NullPointerException

at net.sf.jasperreports.engine.design.JRDesignDataset.getSortFields(JRDesignDataset.java:521)

at net.sf.jasperreports.engine.design.JRVerifier.verifySortFields(JRVerifier.java:708)

at net.sf.jasperreports.engine.design.JRVerifier.verifyDataset(JRVerifier.java:2372)

at net.sf.jasperreports.engine.design.JRVerifier.verifyDesign(JRVerifier.java:213)

at net.sf.jasperreports.engine.design.JRVerifier.verifyDesign(JRVerifier.java:183)

at net.sf.jasperreports.engine.design.JRAbstractCompiler.verifyDesign(JRAbstractCompiler.java:257)

at net.sf.jasperreports.engine.design.JRAbstractCompiler.compileReport(JRAbstractCompiler.java:144)

at net.sf.jasperreports.engine.design.JRDefaultCompiler.compileReport(JRDefaultCompiler.java:105)

at net.sf.jasperreports.engine.JasperCompileManager.compileReport(JasperCompileManager.java:212)

 

kind regards,

Christiaan [file name=reportsaved.txt size=7857]http://www.jasperforge.org/components/com_joomlaboard/uploaded/files/reportsaved.txt[/file]

Post edited by: christiaan_se, at: 2007/05/03 15:11

[Teodor Danciu]

Hi,

 

This is a bug. It will be solved in a future release.

If you want to workaround it, you can use 1.2.6 to load the JasperDesign objects and then export them to JRXML format. Then with 1.3.3, you load them from JRXML and serialize again.

 

I hope this helps.

Teodor

[christiaan_se]

Thanks. Btw, do you recommend saving JasperDesign to xml instead of serializing the object for compatibility reasons?

 

kind regards,

Christiaan

[Teodor Danciu]

Hi,

 

Yes, I think storing JRXML it is safer. It is like keeping the source file.

 

This bug was solved in the head version on SVN.

 

Thank you,

Teodor