What is the easiest way to fill with empty rows

[hozawa]

I want my report to alway show 25 rows per page. If there is less than 25 rows, I want the remaining rows to be filled with blank values.

It's possible to make my datasource always be a multiple of 25 by adding extra rows but if report layout changes and I want 20 rows instead, I have to change the datasource to generate in multiple of 20 instead. Since this involves programming, this isn't very good.

Another way is to draw borders in a background band. This works better but changing background is clumsy and a waste of time.

I can scan the form into the background but this involved creating a form image.

Is there any other way to fill remaining rows with blank rows? It's very easy to drag & drop fields and set their borders. Is there a way to just add additional blank rows using this way?

[hozawa]

I just modified jasperreports so I can just set "fillTo" attribute on the detail band to fill the page with empty rows till the specified value. 

https://github.com/ozawa-hi/jasperreports/tree/fill_with_rows

[drncata]

I need to do the same, I need to have 16 rows per page.With or without data...
Please help