[lworld] RFR: 8377162: [lworld] getResourceAsStream() doesn't work in preview mode for exploded images [v2]

[David Beaumont]

On Wed, 4 Feb 2026 15:37:48 GMT, David Beaumont <duke at openjdk.org> wrote:

>> David Beaumont has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains five additional commits since the last revision:
>> 
>>  - Merge branch 'lworld' into jdk_8377162_exploded_modules/squashed
>>  - revert unnecessary filter in ModulePatcher
>>  - Latest version
>>  - Limit awareness of preview resources to system modules only.
>>    
>>    * limit preview handling
>>    * Patch ModuleReaderTest from mainline
>>  - Preview mode for exploded system module readers
>>    
>>    * with better flag plumbing
>>    * Simpler approach with linked hash set
>>    * Revert weird import change
>>    * First cut at a preview aware module reader for exploded builds
>>    * Test for partiy of JRT file-system and class resources in preview mode
>
> test/jdk/jdk/internal/jrtfs/JrtFileSystemClassParityTest.java line 1:
> 
>> 1: /*
> 
> The issue here is that this test is only meaningful if run via exploded-test, so I'm not happy submitting this directly (since it would have passed with the old code too). I want to write a unit test that directory creates and inspects an on-disk module in preview mode, but that needs a whitebox test since it needs access to the package access factory method.

After offline discussions, I'll also add a top level test to create an exploded build (in a separate PR).

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PR Review Comment: https://git.openjdk.org/valhalla/pull/2032#discussion_r2816467707