RFR: 8331467: FileSystems.getDefault fails with ClassNotFoundException if custom default provider is in run-time image [v9]

[Alan Bateman]

On Thu, 19 Dec 2024 12:38:27 GMT, liyazzi <duke at openjdk.org> wrote:

>> For two cases:
>> 
>> 1. When the ImageReaderFactory was loaded by local jdk,that means the ImageReaderFactory was loaded by boot class loader,then init the `Path BOOT_MODULES_JIMAGE` by using `sun.nio.fs.DefaultFileSystemProvider` which is obtained through reflection,due to it is in jdk internal.
>> 2. When loaded by a target jdk, such as jdk8 runtime, then use the Java 8 compatible APIs: `FileSystems.getDefault()` to init the `BOOT_MODULES_JIMAGE` field.
>> Then we can avoid the circular dependencies in class loading caused by loading the defaultSystemProvider.
>
> liyazzi has updated the pull request incrementally with two additional commits since the last revision:
> 
>  - Update the date of 'ImageReaderFactory'
>  - Update the date of 'ImageReaderFactory' and remove the import of 'Disabled' in SetDefaultProvider test

Marked as reviewed by alanb (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/22628#pullrequestreview-2514541604