It would be extra-ordinarily helpful to be able to use groovy closures within JasperReport expressions. This would allow us to do things like use filters:
barsOfAllFoos.findAll { it.contains 'baz' }.join(',')
and drop the results directly into a field rather write than complex subreports to achieve similar results.
As I understand, this needs Jasper to be able to support evaluating an expression into more than one class. What is needed to make that happen? Where in the code would we look to try and hack this together?
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