Sune Keller created FREEMARKER-232:
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Summary: Add configuration option to skip call to
stripTrailingZeros on BigDecimal Numbers
Key: FREEMARKER-232
URL: https://issues.apache.org/jira/browse/FREEMARKER-232
Project: Apache Freemarker
Issue Type: Improvement
Components: engine
Affects Versions: 2.3.32
Reporter: Sune Keller
When evaluating a template in which the model contains a field for which the
value is a simple BigDecimal with a given scale and trailing zeros within that
scale, the trailing zeros are stripped away by the implementation in
{{{}freemarker.core.CTemplateNumberFormat#formatToPlainText{}}}:
{code:java}
} else if (num instanceof BigDecimal) {
BigDecimal bd = ((BigDecimal) num).stripTrailingZeros();
int scale = bd.scale();
if (scale <= 0) {
// A whole number. Maybe a long ID in a database or other system, and
for those exponential form is not
// expected generally, so we avoid that. But then, it becomes too easy
to write something like
// 1e1000000000000 and kill the server with a terra byte long rendering
of the number, so for lengths
// that realistically aren't ID-s or such, we use exponential format
after all:
if (scale <= -100) {
return bd.toString(); // Will give exponential form for this scale
}
return bd.toPlainString(); // Never gives exponential form
}
// `db` is not a whole number. Note that `bd` is already normalized to not
have trailing zeroes.
return bd.toString(); // Gives exponential form of the absolute value of
the number is less than 1E-7 {code}
It would be wonderful to be able to configure whether any trailing zeros are
stripped or not by way of some configuration option, so as to avoid having to
copy and re-implement this final non-public class.
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