content: /*
   * 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;
  }
  