Java UserPrincipalLookupService.lookupPrincipalByGroupName方法代碼示例

import java.nio.file.attribute.UserPrincipalLookupService; //導入方法依賴的package包/類
@Test
public void testUserLookupService() throws IOException {
  UserPrincipalLookupService service = new UserLookupService(true);
  UserPrincipal bob1 = service.lookupPrincipalByName("bob");
  UserPrincipal bob2 = service.lookupPrincipalByName("bob");
  UserPrincipal alice = service.lookupPrincipalByName("alice");

  assertThat(bob1).isEqualTo(bob2);
  assertThat(bob1).isNotEqualTo(alice);

  GroupPrincipal group1 = service.lookupPrincipalByGroupName("group");
  GroupPrincipal group2 = service.lookupPrincipalByGroupName("group");
  GroupPrincipal foo = service.lookupPrincipalByGroupName("foo");

  assertThat(group1).isEqualTo(group2);
  assertThat(group1).isNotEqualTo(foo);
}
 

import java.nio.file.attribute.UserPrincipalLookupService; //導入方法依賴的package包/類
/**
 * creates and grants permission to daemon files directory
 */
private static void setupEnvironment() {
	final File daemonFilePath = new File("/var/run/iofabric");
	if (!daemonFilePath.exists()) {
		try {
			daemonFilePath.mkdirs();

			UserPrincipalLookupService lookupservice = FileSystems.getDefault().getUserPrincipalLookupService();
			final GroupPrincipal group = lookupservice.lookupPrincipalByGroupName("iofabric");
			Files.getFileAttributeView(daemonFilePath.toPath(), PosixFileAttributeView.class,
					LinkOption.NOFOLLOW_LINKS).setGroup(group);
			Set<PosixFilePermission> perms = PosixFilePermissions.fromString("rwxrwx---");
			Files.setPosixFilePermissions(daemonFilePath.toPath(), perms);
		} catch (Exception e) {
		}
	}

}
 

import java.nio.file.attribute.UserPrincipalLookupService; //導入方法依賴的package包/類
private GroupPrincipal getGroupPrincipalFrom(String groupName) throws IOException
{
    try {
        if (_isCacheEnabled) {
            return _nameToGroupPrincipal.get(groupName);
        }
        UserPrincipalLookupService service =
                FileSystems.getDefault().getUserPrincipalLookupService();
        return service.lookupPrincipalByGroupName(groupName);
    } catch (IOException | UnsupportedOperationException e) {
        return null;
    }
}
 

import java.nio.file.attribute.UserPrincipalLookupService; //導入方法依賴的package包/類
private GroupPrincipal getGroupPrincipalFrom(String groupName) throws IOException
{
    try {
        GroupPrincipal principal = _nameToGroupPrincipal.get(groupName);
        if (principal == null) {
            UserPrincipalLookupService service =
                    FileSystems.getDefault().getUserPrincipalLookupService();
            principal = service.lookupPrincipalByGroupName(groupName);
            _nameToGroupPrincipal.put(groupName, principal);
        }
        return principal;
    } catch (UnsupportedOperationException e) {
        throw new IOException(e);
    }
}
 

import java.nio.file.attribute.UserPrincipalLookupService; //導入方法依賴的package包/類
/**
 * @param localFile the local file to use chown on
 * @param owner the file owner to set
 * @param group the file group to set
 * @throws IOException if chown couldn't be edited
 */
public static void chown(File localFile, String owner, String group) throws IOException {
	PosixFileAttributeView view = FileHelper.getFileAttributes(localFile);
	UserPrincipalLookupService lookupService = FileSystems.getDefault().getUserPrincipalLookupService();
	UserPrincipal fileOwner = lookupService.lookupPrincipalByName(owner);
	GroupPrincipal fileGroup = lookupService.lookupPrincipalByGroupName(group);
	view.setOwner(fileOwner);
	view.setGroup(fileGroup);
}
 

import java.nio.file.attribute.UserPrincipalLookupService; //導入方法依賴的package包/類
@Test
public void testServiceNotSupportingGroups() throws IOException {
  UserPrincipalLookupService service = new UserLookupService(false);

  try {
    service.lookupPrincipalByGroupName("group");
    fail();
  } catch (UserPrincipalNotFoundException expected) {
    assertThat(expected.getName()).isEqualTo("group");
  }
}
 

import java.nio.file.attribute.UserPrincipalLookupService; //導入方法依賴的package包/類
/**
 * Define file posix attribute view on a path/file.
 *
 * @param path Target path
 * @param filePermissions Permissions to apply
 * @param fileOwner File owner
 * @param fileGroup File group
 * @throws IOException If IO error during definition of file attribute view
 */
public static void defineFilePosixAttributeView(final Path path,
        final Set<PosixFilePermission> filePermissions,
        final String fileOwner,
        final String fileGroup) throws IOException {
    final PosixFileAttributeView view = Files.getFileAttributeView(path, PosixFileAttributeView.class);
    if (view != null) {
        final UserPrincipalLookupService lookupService = FileSystems.getDefault()
                .getUserPrincipalLookupService();
        if (fileOwner != null) {
            final UserPrincipal userPrincipal = lookupService.lookupPrincipalByName(fileOwner);
            if (userPrincipal != null) {
                // If not sudoers member, it will throw Operation not permitted
                // Only processes with an effective user ID equal to the user ID
                // of the file or with appropriate privileges may change the ownership of a file.
                // If _POSIX_CHOWN_RESTRICTED is in effect for path
                view.setOwner(userPrincipal);
            }
        }
        if (fileGroup != null) {
            final GroupPrincipal groupPrincipal = lookupService.lookupPrincipalByGroupName(fileGroup);
            if (groupPrincipal != null) {
                // The current user id should be members of this group,
                // if not will raise Operation not permitted
                view.setGroup(groupPrincipal);
            }
        }
        if (filePermissions != null) {
            view.setPermissions(filePermissions);
        }
    }
}
 

import java.nio.file.attribute.UserPrincipalLookupService; //導入方法依賴的package包/類
@Override
public void setGroup(String group) throws IOException {
  UserPrincipalLookupService lookupService = FileSystems.getDefault().getUserPrincipalLookupService();
  GroupPrincipal groupPrincipal = lookupService.lookupPrincipalByGroupName(group);
  Files.getFileAttributeView(file.toPath(), PosixFileAttributeView.class).setGroup(groupPrincipal);
}