RFR: 8350880: (zipfs) Add support for read-only zip file systems [v4]

[David Beaumont]

On Wed, 14 May 2025 16:42:07 GMT, Lance Andersen <lancea at openjdk.org> wrote:

>> David Beaumont has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Changes based on review feedback.
>
> test/jdk/jdk/nio/zipfs/TestPosix.java line 434:
> 
>> 432:         createTestZipFile(ZIP_FILE, ENV_DEFAULT).close();
>> 433:         // check entries on zipfs with default options
>> 434:         try (FileSystem zip = FileSystems.newFileSystem(ZIP_FILE, ENV_DEFAULT)) {
> 
> This tests an empty Map and should still be a test as it is different from ENV_READ_ONLY

Revert and added new ReadOnly variants of those tests. Thanks for calling me out on this, it was a bit sloppy of me.

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PR Review Comment: https://git.openjdk.org/jdk/pull/25178#discussion_r2095503763