<AWT Dev> [9] Review Request: 6815345 java.awt.Component.createImage(int width, int height) should remove behavioral optionality

Sergey Bylokhov Sergey.Bylokhov at oracle.com
Thu Sep 24 13:03:52 UTC 2015

On 24.09.15 15:58, Semyon Sadetsky wrote:
> On 9/24/2015 3:25 PM, Sergey Bylokhov wrote:
>> On 24.09.15 11:36, Semyon Sadetsky wrote:
>>> Hi Sergey,
>>>   isHeadless()=true must return null. If so please add the corresponding
>>> test case. It is not not obvious from the code.
>> isHeadless()=true is headless mode where the frames are always not
>> displayable, so everything is similar to the current test except that
>> in headless the pack() will be throw an exception and second part of
>> the test in this mode is unnecessary.
> Then maybe simply do not call pack() for the headless test?

I mean that not displayable components and headless mode is synonymous 
because component cannot create a peer in such mode, but ok I'll update 
a test.

> Okay, let me rephrase what I meant. Since isHeadless()=true case is
> mentioned in those 3 specs so explicitly it must be guarantied that the
> specified behavior works for the case as described.  I cannot trace the
> result by reading the code of the createImage(), isHeadless() method is
> not even called there.  So the test case should be added. Or you could
> remove isHeadless() references from the specs. Or write something like
> "the result is non-deterministic if isHeadless() is not false..."
>>> --Semyon
>>> On 9/23/2015 9:14 PM, Sergey Bylokhov wrote:
>>>> Hello.
>>>> Please review the fix for jdk9.
>>>> The specification is updated as suggested in JDK-6186530 and
>>>> JDK-6815345. The test is added to prove that we always return null
>>>> when the component is not displayable.
>>>> ccc request will be created after the technical review. One additional
>>>> bug filed https://bugs.openjdk.java.net/browse/JDK-8137047
>>>> Bug: https://bugs.openjdk.java.net/browse/JDK-6815345
>>>> Webrev can be found at:
>>>> http://cr.openjdk.java.net/~serb/6815345/webrev.04

Best regards, Sergey.

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