git: openjdk/jdk: 8283335: Add exists and readAttributesIfExists methods to FileSystemProvider

[Lance Andersen]

Changeset: d48694d0
Author:    Lance Andersen <lancea at openjdk.org>
Date:      2022-07-05 19:45:08 +0000
URL:       https://git.openjdk.org/jdk/commit/d48694d0f3865c1b205acdfa2e6c6d032a39959d

8283335: Add exists and readAttributesIfExists methods to FileSystemProvider

Reviewed-by: alanb

! src/java.base/share/classes/java/nio/file/Files.java
! src/java.base/share/classes/java/nio/file/spi/FileSystemProvider.java
! src/java.base/share/classes/sun/nio/fs/AbstractFileSystemProvider.java
! src/java.base/unix/classes/sun/nio/fs/UnixFileAttributes.java
! src/java.base/unix/classes/sun/nio/fs/UnixFileSystemProvider.java
! src/java.base/unix/classes/sun/nio/fs/UnixNativeDispatcher.java
! src/java.base/unix/classes/sun/nio/fs/UnixUriUtils.java
! src/java.base/unix/native/libnio/fs/UnixNativeDispatcher.c
! src/jdk.zipfs/share/classes/jdk/nio/zipfs/ZipFileSystemProvider.java
! src/jdk.zipfs/share/classes/jdk/nio/zipfs/ZipPath.java
+ test/jdk/java/nio/file/spi/TestDelegation.java
! test/jdk/java/nio/file/spi/TestProvider.java
+ test/micro/org/openjdk/bench/jdk/nio/zipfs/ZipfileSystemProviderDelegation.java