[Springframework-developer] Chaining the JasperReportsViewResolver

[Chris H. <chr...@aw...>]

Hi,

I've just started using JasperReports in Spring, and came across a problem which
I would like to suggest a fix.

I would like to chain the JasperReportsViewResolver(JRVR) before my main JSP
resolver. I would expect the JRVR to pass control to the JSP resolver if it
cannot find the requested .jasper file, but it actually throws an exception.
This means that the JRVR in its current form cannot be used in a Resolver
Chain.

To make it Resolver Chain friendly, it must return a null view on fail. I have
made the assumption that if the file doesnt exist, this is a failure. I have
made some minor modifications as follows:

1. Added JRVR.createView(String, Locale) to overload its abstract parent. This
calls loadView() but catches the exception thrown in
AbstractJaspperReportsView.loadReport(Resource), which returns null.
2. In AbstractJaspperReportsView.loadReport(Resource), I changed the exception
thrown for the caught IOException as I needed to differentiate between the two
catch statements.

Hope this is of use to someone in the future.
Regards,
Chris