[jdk9] RFR: 8163517: Various cleanup in java.io code

Ivan Gerasimov ivan.gerasimov at oracle.com
Thu Aug 18 18:23:52 UTC 2016

Hi Claes!

Thank you for looking into this.

On 18.08.2016 15:25, Claes Redestad wrote:
> On 2016-08-16 19:20, Ivan Gerasimov wrote:
>>> ObjectStreamClass:
>>> I wonder if the entire getPackageName is replaceable with
>>> Class.getPackageName()? If so, ditch the method completely and use
>>> Class.getPackageName everywhere. This may complicate backporting to JDK
>>> 8 though.
>> Unfortunately, Class.getPackageName() cannot handle arrays, so I'll 
>> leave it as is. 
> There are a number of utility methods around that could be reused,
> e.g., jdk.internal.reflect.Reflection.isSameClassPackage handles both 
> arrays and
> primitive types and could replace both packageEquals and 
> getPackageName in
> ObjectStreamClass (which already use j.i.r.Reflection for other 
> things). Making
> isSameClassPackage in Reflection public should be non-controversial, I 
> hope.

Yes, thanks for the pointer!
That's right, there are several similar methods in different packages.
I see that the third option is 
sun.invoke.util.VerifyAccess.isSamePackage / getPackageName, but it also 
has its nuances.

I guess that keeping ObjectStreamClass.getPackageName() separated would 
be the simplest approach: it minimizes the chances of regression and 
doesn't make it harder to do future modifications to 
Reflection.isSameClassPackage, if it is ever needed.

If there are no objections, I'd like to push the latest variant of the 
fix, which is at

With kind regards,

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