1/*
2 * Copyright (c) 2007, 2011, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26package java.nio.file.attribute;
27
28import java.util.Set;
29
30/**
31 * File attributes associated with files on file systems used by operating systems
32 * that implement the Portable Operating System Interface (POSIX) family of
33 * standards.
34 *
35 * <p> The POSIX attributes of a file are retrieved using a {@link
36 * PosixFileAttributeView} by invoking its {@link
37 * PosixFileAttributeView#readAttributes readAttributes} method.
38 *
39 * @since 1.7
40 */
41
42public interface PosixFileAttributes
43    extends BasicFileAttributes
44{
45    /**
46     * Returns the owner of the file.
47     *
48     * @return  the file owner
49     *
50     * @see PosixFileAttributeView#setOwner
51     */
52    UserPrincipal owner();
53
54    /**
55     * Returns the group owner of the file.
56     *
57     * @return  the file group owner
58     *
59     * @see PosixFileAttributeView#setGroup
60     */
61    GroupPrincipal group();
62
63    /**
64     * Returns the permissions of the file. The file permissions are returned
65     * as a set of {@link PosixFilePermission} elements. The returned set is a
66     * copy of the file permissions and is modifiable. This allows the result
67     * to be modified and passed to the {@link PosixFileAttributeView#setPermissions
68     * setPermissions} method to update the file's permissions.
69     *
70     * @return  the file permissions
71     *
72     * @see PosixFileAttributeView#setPermissions
73     */
74    Set<PosixFilePermission> permissions();
75}
76