Java tutorial
/* * Copyright (c) 2007, 2009, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package java.nio.file.attribute; import java.security.Principal; /** * A {@code Principal} representing an identity used to determine access rights * to objects in a file system. * * <p> On many platforms and file systems an entity requires appropriate access * rights or permissions in order to access objects in a file system. The * access rights are generally performed by checking the identity of the entity. * For example, on implementations that use Access Control Lists (ACLs) to * enforce privilege separation then a file in the file system may have an * associated ACL that determines the access rights of identities specified in * the ACL. * * <p> A {@code UserPrincipal} object is an abstract representation of an * identity. It has a {@link #getName() name} that is typically the username or * account name that it represents. User principal objects may be obtained using * a {@link UserPrincipalLookupService}, or returned by {@link * FileAttributeView} implementations that provide access to identity related * attributes. For example, the {@link AclFileAttributeView} and {@link * PosixFileAttributeView} provide access to a file's {@link * PosixFileAttributes#owner owner}. * * @since 1.7 */ public interface UserPrincipal extends Principal { }