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need global stringbuffer


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I am iterating through a subreport several times in my main report. I have a need to store some artifact reflecting each iteration that I can evaluate in a later report band. Is there some sort of global stringbuffer mechanism that I can append to after each time through?
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I tried passing a variable back and forth previously but whenever I passed the variable back into the subreport the second time, it went back as a null; not the previous value. That has been my problem, it seems to lose scope on each iteration.


As for the Java class, would that creted class be part of my iReport or an additonal file (like a scriptlet)? It is desirable that I not have additional files to account for.

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