| /* |
| * 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; |
| |
| /** |
| * Defines the standard open options. |
| * |
| * @since 1.7 |
| */ |
| |
| public enum StandardOpenOption implements OpenOption { |
| /** |
| * Open for read access. |
| */ |
| READ, |
| |
| /** |
| * Open for write access. |
| */ |
| WRITE, |
| |
| /** |
| * If the file is opened for {@link #WRITE} access then bytes will be written |
| * to the end of the file rather than the beginning. |
| * |
| * <p> If the file is opened for write access by other programs, then it |
| * is file system specific if writing to the end of the file is atomic. |
| */ |
| APPEND, |
| |
| /** |
| * If the file already exists and it is opened for {@link #WRITE} |
| * access, then its length is truncated to 0. This option is ignored |
| * if the file is opened only for {@link #READ} access. |
| */ |
| TRUNCATE_EXISTING, |
| |
| /** |
| * Create a new file if it does not exist. |
| * This option is ignored if the {@link #CREATE_NEW} option is also set. |
| * The check for the existence of the file and the creation of the file |
| * if it does not exist is atomic with respect to other file system |
| * operations. |
| */ |
| CREATE, |
| |
| /** |
| * Create a new file, failing if the file already exists. |
| * The check for the existence of the file and the creation of the file |
| * if it does not exist is atomic with respect to other file system |
| * operations. |
| */ |
| CREATE_NEW, |
| |
| /** |
| * Delete on close. When this option is present then the implementation |
| * makes a <em>best effort</em> attempt to delete the file when closed |
| * by the appropriate {@code close} method. If the {@code close} method is |
| * not invoked then a <em>best effort</em> attempt is made to delete the |
| * file when the Java virtual machine terminates (either normally, as |
| * defined by the Java Language Specification, or where possible, abnormally). |
| * This option is primarily intended for use with <em>work files</em> that |
| * are used solely by a single instance of the Java virtual machine. This |
| * option is not recommended for use when opening files that are open |
| * concurrently by other entities. Many of the details as to when and how |
| * the file is deleted are implementation specific and therefore not |
| * specified. In particular, an implementation may be unable to guarantee |
| * that it deletes the expected file when replaced by an attacker while the |
| * file is open. Consequently, security sensitive applications should take |
| * care when using this option. |
| * |
| * <p> For security reasons, this option may imply the {@link |
| * LinkOption#NOFOLLOW_LINKS} option. In other words, if the option is present |
| * when opening an existing file that is a symbolic link then it may fail |
| * (by throwing {@link java.io.IOException}). |
| */ |
| DELETE_ON_CLOSE, |
| |
| /** |
| * Sparse file. When used with the {@link #CREATE_NEW} option then this |
| * option provides a <em>hint</em> that the new file will be sparse. The |
| * option is ignored when the file system does not support the creation of |
| * sparse files. |
| */ |
| SPARSE, |
| |
| /** |
| * Requires that every update to the file's content or metadata be written |
| * synchronously to the underlying storage device. |
| * |
| * @see <a href="package-summary.html#integrity">Synchronized I/O file integrity</a> |
| */ |
| SYNC, |
| |
| /** |
| * Requires that every update to the file's content be written |
| * synchronously to the underlying storage device. |
| * |
| * @see <a href="package-summary.html#integrity">Synchronized I/O file integrity</a> |
| */ |
| DSYNC; |
| } |