When we are developing a report, there will be an instance when a section of the report can be produced with one data set whereas another section of the report can be produced with a different data set. Even if we combined them and still had one data set, we may have situations where we would have to keep them separate (say, to enhance the re-usability or make the design modular, and so on). In those cases, JasperReports offers the sub-reports functionality. With the use of sub-reports, one can use multiple data sets in a report and develop re-usable reports. In this section, we will discuss how we can make use of the sub-reports in our report and get them working inside ADempiere.

In this recipe, we will design the complete version of the MOM report so that the concept can be demonstrated and we can get our final formatted, production-ready report showing a MOM detail in the format, which we expressed our interest in Chapter 2.