Java Reference
In-Depth Information
Listing 10-18.
Updating ACL Entries for a File
// AclUpdateEntryTest.java
package com.jdojo.nio2;
import java.io.IOException;
import java.nio.file.FileSystems;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.List;
import java.util.Set;
import java.nio.file.attribute.AclEntry;
import java.nio.file.attribute.AclEntryPermission;
import java.nio.file.attribute.AclEntryType;
import java.nio.file.attribute.AclFileAttributeView;
import java.nio.file.attribute.UserPrincipal;
import java.util.EnumSet;
import static java.nio.file.attribute.AclEntryPermission.READ_DATA;
import static java.nio.file.attribute.AclEntryPermission.WRITE_DATA;
public class AclUpdateEntryTest {
public static void main(String[] args) {
Path path = Paths.get("C:\\poems\\luci1.txt");
AclFileAttributeView aclView =
Files.getFileAttributeView(path, AclFileAttributeView.class);
if (aclView == null) {
System.out.format("ACL view is not supported.%n");
return;
}
try {
// Get UserPrincipal for brice
UserPrincipal bRiceUser =
FileSystems.getDefault()
.getUserPrincipalLookupService()
.lookupPrincipalByName("brice");
// Prepare permissions set
Set<AclEntryPermission> permissions = EnumSet.of(READ_DATA, WRITE_DATA);
// Let us build an ACL entry
AclEntry.Builder builder = AclEntry.newBuilder();
builder.setPrincipal(bRiceUser);
builder.setType(AclEntryType.ALLOW);
builder.setPermissions(permissions);
AclEntry newEntry = builder.build();
// Get the ACL entry for the path
List<AclEntry> aclEntries = aclView.getAcl();
