1 /*
   2  * Copyright (c) 2007, 2009, 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 
  26 package java.nio.file.attribute;
  27 
  28 import 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  * @see Attributes#readPosixFileAttributes
  42  */
  43 
  44 public interface PosixFileAttributes
  45     extends BasicFileAttributes
  46 {
  47     /**
  48      * Returns the owner of the file.
  49      *
  50      * @return  the file owner
  51      *
  52      * @see PosixFileAttributeView#setOwner
  53      */
  54     UserPrincipal owner();
  55 
  56     /**
  57      * Returns the group owner of the file.
  58      *
  59      * @return  the file group owner
  60      *
  61      * @see PosixFileAttributeView#setGroup
  62      */
  63     GroupPrincipal group();
  64 
  65     /**
  66      * Returns the permissions of the file. The file permissions are returned
  67      * as a set of {@link PosixFilePermission} elements. The returned set is a
  68      * copy of the file permissions and is modifiable. This allows the result
  69      * to be modified and passed to the {@link PosixFileAttributeView#setPermissions
  70      * setPermissions} method to update the file's permissions.
  71      *
  72      * @return  the file permissions
  73      *
  74      * @see PosixFileAttributeView#setPermissions
  75      */
  76     Set<PosixFilePermission> permissions();
  77 }