To be honest the only reason I’m using the json data loader in YARG is because I don’t see other choice - it’s the easiest solution - using jackson ObjectMapper to convert java collections to json string; still, it’s quite redundant to waste time on the collections-json conversion.
All I have when generating the reports are simple Lists and Maps with calculated values - this is my data. I cannot use the sql loader because of calculated values, and I cannot (?) use the groovy loader, because I don’t know how.
Is it possible to automatically convert the java collections to groovy collection strings? But then - having already java collections, why should it be needed?