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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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41
src/java.base/share/classes/sun/nio/fs/AbstractFileSystemProvider.java
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2011, 2022, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2011, 2023, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@ -25,8 +25,9 @@
package sun.nio.fs;
import java.nio.file.Path;
import java.nio.file.AccessMode;
import java.nio.file.LinkOption;
import java.nio.file.Path;
import java.nio.file.spi.FileSystemProvider;
import java.io.IOException;
import java.util.Map;
@ -115,4 +116,40 @@ public abstract class AbstractFileSystemProvider extends FileSystemProvider {
* If path is empty, then an empty byte[] is returned.
*/
public abstract byte[] getSunPathForSocketFile(Path path);
/**
* Tests whether a file is readable.
*/
public boolean isReadable(Path path) {
try {
checkAccess(path, AccessMode.READ);
} catch (IOException e) {
return false;
}
return true;
}
/**
* Tests whether a file is writable.
*/
public boolean isWritable(Path path) {
try {
checkAccess(path, AccessMode.WRITE);
} catch (IOException e) {
return false;
}
return true;
}
/**
* Tests whether a file is executable.
*/
public boolean isExecutable(Path path) {
try {
checkAccess(path, AccessMode.EXECUTE);
} catch (IOException e) {
return false;
}
return true;
}
}