I was about to ask this question :)
I'm OK to include Commons Math as a POI dependency. There are lots of
stuff we can use in POI - bug #49538 uses Math's implementation of
Poisson and we may want to include other statistical distributions like
beta, gamma and binom.
Previously I copied into POI a snippet of code that calculates
fractional numbers. It was easy because that part is isolated. However,
this trick will not work for statistical distributions - there are lots
of dependencies and we will have to copy whole packages.
What do people think? Would it be ok to include this as a dependency?
Should we require it for these features, but let everything else work
without it (which could mean you run poi fine for ages, then suddenly
one day it blows up saying "hey, I need commons math now!")? Should we
decline the patches that need commons math, and do without those
features?
We should certainly handle the case when commons math is not present, at
least, we should wrap the default ClassNotFoundException.
Yegor
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