2362N/A * Copyright (c) 2007, 2009, Oracle and/or its affiliates. All rights reserved. 893N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 893N/A * This code is free software; you can redistribute it and/or modify it 893N/A * under the terms of the GNU General Public License version 2 only, as 2362N/A * published by the Free Software Foundation. Oracle designates this 893N/A * particular file as subject to the "Classpath" exception as provided 2362N/A * by Oracle in the LICENSE file that accompanied this code. 893N/A * This code is distributed in the hope that it will be useful, but WITHOUT 893N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 893N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 893N/A * version 2 for more details (a copy is included in the LICENSE file that 893N/A * accompanied this code). 893N/A * You should have received a copy of the GNU General Public License version 893N/A * 2 along with this work; if not, write to the Free Software Foundation, 893N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 2362N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 2362N/A * or visit www.oracle.com if you need additional information or have any 893N/A * A {@code Principal} representing an identity used to determine access rights 893N/A * to objects in a file system. 893N/A * <p> On many platforms and file systems an entity requires appropriate access 893N/A * rights or permissions in order to access objects in a file system. The 893N/A * access rights are generally performed by checking the identity of the entity. 893N/A * For example, on implementations that use Access Control Lists (ACLs) to 893N/A * enforce privilege separation then a file in the file system may have an 893N/A * associated ACL that determines the access rights of identities specified in 893N/A * <p> A {@code UserPrincipal} object is an abstract representation of an 893N/A * identity. It has a {@link #getName() name} that is typically the username or 893N/A * account name that it represents. User principal objects may be obtained using 893N/A * a {@link UserPrincipalLookupService}, or returned by {@link 893N/A * FileAttributeView} implementations that provide access to identity related 893N/A * attributes. For example, the {@link AclFileAttributeView} and {@link 893N/A * PosixFileAttributeView} provide access to a file's {@link 893N/A * PosixFileAttributes#owner owner}.