RFR: 8072379: Implement jdk.Version and jdk.OracleVersion
joe.darcy at oracle.com
Thu Jan 14 06:56:21 UTC 2016
On 1/13/2016 1:01 AM, Daniel Fuchs wrote:
> Hi Joe,
> On 1/13/16 2:06 AM, Joseph D. Darcy wrote:
>> Hi Iris,
>> Catching up on old reviews, the regular expression for versions is
>> given as
>> Is this equivalent to
> Iris's regexp will disallow trailing .0
> 9.0.1 will match, but 9.0 and 9.0.0 will not - the version should
> be plain 9 in those latter cases as documented in the javadoc.
> I believe this is important because it ensures that the version string
> is always in canonical form, which makes it possible to simply compare
> the 'versions' list (List<Integer>) within the various variations
> of equals...
> So the regexp matching will eliminate non canonical forms without
> having to perform further checks down the road.
> Took me a while to figure it, I had to look at the test to
> pinpoint it. Now that I understand, I find it quite elegant :-)
Ah okay, I missed those points when reading over the regular expression.
I suggest some discussion be added to explain and document that those
aspects of the design are intentional.
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