Does isUsingCache work for images in subreports?

[stelek]

Hi,

I have the following configuration of reports/subreports"

• main
  • subreport
    • subsubreport A
    • subsubreport B

"subsubreport A" contains an image. Since A appears thousands of times in the main report, the image also appears thousands of times. Because of that, the PDF file size grows a lot (from 5MB without image to 330 MB with image). I wanted to try to have the image only once in the final PDF, so I turned on the "isUsingCache" option for the image in subsubreport A.

The result is that:

• the file size was not reduced at all
• the memory usage during report generation went up a lot (to a point where I had to limit my source data or I was running out of memory even though I'm using a virtualizer)

So my question is: is the "image caching" mechanism supposed to work across subreports and if so, how can I achieve that? Or maybe there's some other way to remove duplicate images (eg. during exporting to PDF)?

Thanx in advance for any help.

[stelek]

OK, I managed to solve it myself. The issue was not with the "subreport structure" but with the fact that I was using java.awt.Image as the image source. Unfortunately the Image object was not static - instead a new instance was created each time. JR was not able to recognize that the Image objects were actually identical and was not caching it. I changed the scriptlet to contain a static object and now the caching works :)