On Thu, 23 Jun 2022 08:05:42 GMT, Chris Hegarty <che...@openjdk.org> wrote:

>> Hi,
>> 
>> Please review the following patch which will:
>> 
>> - Enhance the java.nio.file.spi.FileSystemProvider abstract class to include 
>> the methods
>> 
>>   - public boolean exists(Path path, LinkOption... options)
>>   - public <A extends BasicFileAttributes> A readAttributesIfExists(Path 
>> path, Class<A> type, LinkOption... options)
>> 
>> 
>> This change allows for providers to provide optimizations when the file's 
>> attributes are not needed.
>> 
>> Mach5 tiers 1 - 3  run clean with this change
>> 
>> The CSR may be viewed at 
>> [JDK-8283336](https://bugs.openjdk.org/browse/JDK-8283336)
>> 
>> 
>> Best,
>> Lance
>
> src/java.base/share/classes/java/nio/file/spi/FileSystemProvider.java line 
> 1202:
> 
>> 1200:      */
>> 1201:     public boolean exists(Path path, LinkOption... options) {
>> 1202:         try {
> 
> Overall, I think that this is a great change (avoiding the need for various 
> parts of the system to communicate through exceptions).
> 
> Trivially, and easily, I often find it useful to add mock-like tests for 
> these specified implementations (implSpec), i.e. just subclass FSP mocking 
> out the abstract methods to ensure that the default implementations invoke 
> the appropriate ones.

Thank you for the suggestion Chris

-------------

PR: https://git.openjdk.org/jdk/pull/9249

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