RFR 8020802: Need an ability to create jar files that are invariant to the pack200 packing/unpacking

[Kumar Srinivasan]

Hi Martin,

> I'm not convinced this feature pulls its weight.
> I'd like to see more motivation/documentation for this change.
> It seems like this just adds a post-processing phase which packs and
> unpacks the jar file (why?)
Pack200 tends to change the internal structure and ordering within
a class file, which adds a complication, if someone wants to sign these.
So a jar file needs to pack and unpacked before signing a jar.

>
> Users who need to do that could just do that in a shell script without
> confusing the 99.99% of current jar users.
The motivating reason is performance, for those who want to  simply
jar up a file and perform the normalization in the same VM and in one
step,  I realize this can be achieved with ant or a custom tool, however
not all customers are willing to write their own tool or wish to use ant.

The average jar users need not use this option, the option is optional
and thus  will not affect 99.99% of the users.

Kumar
>
>
> On Mon, Oct 14, 2013 at 11:44 AM, Alexander Zuev
> <alexander.zuev at oracle.com>wrote:
>
>> Hi,
>>
>>    please review my fix for
>> 8020802: Need an ability to create jar files that are invariant to the
>> pack200 packing/unpacking
>> The fix adds new option to the jar command which makes created jars
>> normalized without the need to invoke the
>> external program.
>>
>> Bug description: https://bugs.openjdk.java.net/**browse/JDK-8020802<https://bugs.openjdk.java.net/browse/JDK-8020802>
>> Webrev with proposed fix: http://cr.openjdk.java.net/~**
>> kizune/8020802/webrev.01<http://cr.openjdk.java.net/~kizune/8020802/webrev.01>
>>
>> With best regards,
>> /Alex
>>