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Multiple Versions of Jasper Reports in same JVM?


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Hello. We have a client with an enormous, enormous collection of reports built for JasperReports 2.0.4. To move, the reports to a newer version of JasperReports would require a very long and very expensive QA and development effort.

Nightly, a report execution process written in Java is kicked off and runs the reports according to the schedule. What I would like to do is to modify the report execution process so that it can run the reports with a report-specific version of JasperReports.  Thus, all existing reports could run with JasperReports 2.0.4 and newly written reports could run on a much newer version of JasperReports. We are hoping to keep modifications to a minumum. I have some ideas about how to do it, but none of them are pretty.

Has anyone out there done such a thing? If so, could you point me in the right direction? 

Thank you!

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