RFR 8243592: Subject$SecureSet::contains(null) is suboptimal

[Sean Mullan]

Looks good.

--Sean

On 6/30/20 11:31 PM, Weijun Wang wrote:
> Please review an updated fix at
> 
>     https://cr.openjdk.java.net/~weijun/8243592/webrev.03
> 
> After some discussion, we think there is no need to call contains(null) at all since it might not be reliable (see the new test). Now, collectionNullClean inspects all items in the input collection and create a new LinkedList.
> 
> Since there is no need to repopulate a list inside "new SecureSet", the new implementation is not slower than the original proposal from Tigran.
> 
> And there is no need for a CSR because there will be no behavior change.
> 
> Thanks,
> Max
> 
> p.s. Welcome to the github playground at https://github.com/openjdk/playground/pull/9, but formal code review should stay in this mail thread.
> 
>> On Apr 30, 2020, at 9:50 PM, Weijun Wang <weijun.wang at oracle.com> wrote:
>>
>> Webrev updated at
>>
>>    http://cr.openjdk.java.net/~weijun/8243592/webrev.02/
>>
>> I removed my old test and rewrite the existing SubjectNullTests.java test in TestNG with quite some new test cases.
>>
>> There are so many behavior changes (although we might say good programs are not affected) that I decided to add a CSR and a release note. Please also take a look.
>>
>>             CSR : https://bugs.openjdk.java.net/browse/JDK-8244165
>>    release note : https://bugs.openjdk.java.net/browse/JDK-8244169
>>
>> Thanks,
>> Max
>>
>>
>>> On Apr 29, 2020, at 2:57 AM, Sean Mullan <sean.mullan at oracle.com> wrote:
>>>
>>> I don't think containsAll and retainsAll need to call collectionNullClean either because SecureSet.contains(null) returns false now.
>>>
>>> --Sean
>>>
>>> On 4/28/20 9:58 AM, Weijun Wang wrote:
>>>> A new webrev is at
>>>>    http://cr.openjdk.java.net/~weijun/8243592/webrev.01/
>>>> I take this chance to do some formatting and add a new test. My first testng test!
>>>> Thanks,
>>>> Max
>>>>> On Apr 28, 2020, at 8:16 PM, Sean Mullan <sean.mullan at oracle.com> wrote:
>>>>>
>>>>> On 4/27/20 10:39 PM, Weijun Wang wrote:
>>>>>> Reading the Set spec, it looks like an NPE is still needed for add(), but remove() can be modified.
>>>>>
>>>>> Good point, I agree.
>>>>>
>>>>> --Sean
>>>>>
>>>>>> --Max
>>>>>>> On Apr 27, 2020, at 10:27 PM, Sean Mullan <sean.mullan at oracle.com> wrote:
>>>>>>>
>>>>>>> The fix looks fine to me. For consistency, you could make the same change for null elements in the other SecureSet methods: add, remove.
>>>>>>>
>>>>>>> --Sean
>>>>>>>
>>>>>>> On 4/25/20 3:39 AM, Weijun Wang wrote:
>>>>>>>> Please take a review at
>>>>>>>>    http://cr.openjdk.java.net/~weijun/8243592/webrev.00/
>>>>>>>> This is helpful if we do any set arithmetic between 2 Subject objects.
>>>>>>>> No new regression test, I intend to add a noreg-trivial label.
>>>>>>>> *Tigran*: Please confirm you are OK with the "Contributed-by" line.
>>>>>>>> Thanks,
>>>>>>>> Max
>>
>