Javadoc does not specify... Is null allowed in Files.setAttribute() as an attribute value?

[Francis Galiegue]

It is very unclear whether it is.

For instance, for a DosFileAttributeView, it will obviously throw an
NPE each time we try to set one of its specific attributes (hidden,
system, archive, readonly) due to attempted unboxing.

Similarly, it does not seem to make much sense for a UserDefinedAttributeView.

The closest exception that I can see is IllegalArgumentException since
it is clearly an "inappropriate value" for such a case.

Yet when I do try to set this attribute (I use Linux) with null as an
argument I get an NPE.

So, shouldn't NPE be specified as a possible exception in the
documentation, or is null just not allowed at all, in which case it
should be mentioned when describing the value parameter?

-- 
Francis Galiegue, fgaliegue at gmail.com, https://github.com/fge
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