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.security.Principal; 29 30 /** 31 * A {@code Principal} representing an identity used to determine access rights 32 * to objects in a file system. 33 * 34 * <p> On many platforms and file systems an entity requires appropriate access 35 * rights or permissions in order to access objects in a file system. The 36 * access rights are generally performed by checking the identity of the entity. 37 * For example, on implementations that use Access Control Lists (ACLs) to 38 * enforce privilege separation then a file in the file system may have an 39 * associated ACL that determines the access rights of identities specified in 40 * the ACL. 41 * 42 * <p> A {@code UserPrincipal} object is an abstract representation of an 43 * identity. It has a {@link #getName() name} that is typically the username or 44 * account name that it represents. User principal objects may be obtained using 45 * a {@link UserPrincipalLookupService}, or returned by {@link 46 * FileAttributeView} implementations that provide access to identity related 47 * attributes. For example, the {@link AclFileAttributeView} and {@link 48 * PosixFileAttributeView} provide access to a file's {@link 49 * PosixFileAttributes#owner owner}. 50 * 51 * @since 1.7 52 */ 53 54 public interface UserPrincipal extends Principal { } 55