Comments (2)
Thank you for reporting this, we'll take a look into it shortly.
Tracked internally on GR 50804
from graaljs.
Is there a way to keep the numeric wrapper class?
Not when you are invoking a Java method that takes Object
. When you need a particular primitive type, I suggest you to invoke a (helper) Java method that takes a parameter of the desired type. I understand that this can be clumsy but it is the safe approach.
Some background: JavaScript has just one number type (ignoring bigint
). This type corresponds to Java double
. That's why graal-js
works with the numbers as if they were doubles. It is using various types (like int
) internally but that's an implementation detail. The good news is that the internals of graal-js
support long
in a limited way. So, it was not that difficult to ensure that long
is not converted to a different numeric type eagerly (as it was done in your test-case). In other words, your long
-based test-case should work with the mentioned change.
I understand that it would be nice to be able to pass other numeric types (byte
, short
, float
) in the same way. Unfortunately, that would require larger and more risky changes within graal-js
. So, we are not pursuing this direction (for now). We may revisit this decision if we see some other compelling use-cases.
from graaljs.
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