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8322166: Files.isReadable/isWritable/isExecutable expensive when file does not exist

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Reviewed-by: alanb
This commit is contained in:
Brian Burkhalter 2023-12-19 18:27:06 +00:00
parent 0f8e4e0a81
commit 51be857f3c
6 changed files with 98 additions and 50 deletions
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19
src/java.base/share/classes/java/nio/file/Files.java
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@ -80,6 +80,7 @@ import java.util.stream.StreamSupport;
import jdk.internal.util.ArraysSupport;
import sun.nio.ch.FileChannelImpl;
import sun.nio.cs.UTF_8;
import sun.nio.fs.AbstractFileSystemProvider;
/**
* This class consists exclusively of static methods that operate on files,
@ -2609,7 +2610,11 @@ public final class Files {
* is invoked to check read access to the file.
*/
public static boolean isReadable(Path path) {
return isAccessible(path, AccessMode.READ);
FileSystemProvider provider = provider(path);
if (provider instanceof AbstractFileSystemProvider afsp)
return afsp.isReadable(path);
else
return isAccessible(path, AccessMode.READ);
}
/**
@ -2640,7 +2645,11 @@ public final class Files {
* is invoked to check write access to the file.
*/
public static boolean isWritable(Path path) {
return isAccessible(path, AccessMode.WRITE);
FileSystemProvider provider = provider(path);
if (provider instanceof AbstractFileSystemProvider afsp)
return afsp.isWritable(path);
else
return isAccessible(path, AccessMode.WRITE);
}
/**
@ -2675,7 +2684,11 @@ public final class Files {
* checkExec} is invoked to check execute access to the file.
*/
public static boolean isExecutable(Path path) {
return isAccessible(path, AccessMode.EXECUTE);
FileSystemProvider provider = provider(path);
if (provider instanceof AbstractFileSystemProvider afsp)
return afsp.isExecutable(path);
else
return isAccessible(path, AccessMode.EXECUTE);
}
// -- Recursive operations --