Question

I have a template which iterates through a map and displays the info as such:

       #{list items:report.getCategoryMap()?.keySet(), as:'cat'}
           %{models.reporting.TransactionReportItem item = report.getCategoryMap()?.get(cat);}%
            
              ${cat}
              ${item?.nbCredit}
              ${item?.getCreditPerc(report.nbCredit)}
              ${item?.nbDebit}
              ${item?.getDebitPerc(report.nbDebit)}
              ${item?.getTotalTransactions()}
            
       #{/list}

for some reason the template always render the result of getCreditPerc and getDebitPerc as 0.0

    public Double getCreditPerc(long totalCredit){
        double perc = (double) (nbCredit / totalCredit);
        Logger.info("nbCredit: %s, total cr: %s", nbCredit, totalCredit);
        return new Double(perc);
    }

When calling the template I can see the output in the log:

2011-11-21 13:54:22 INFO ~ [TransactionReportItem:85] getDebitPerc() – nbDebit: 39, total cr: 4984

I tried using primitive type instead of double object with no success.
When debugging the code I can see that all the values are correctly set.

Could it be something to do with the groovy template rendering?

Answer 1

Posting the log from a different function doesn’t help this question along 😉

However, the problem is that you have two ints in Java, and you are dividing them so you get integer division…

Casting this integer then to a double is too late…

Try:

double perc = (double)nbCredit / totalCredit ;