AclEntryPermission.java

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * particular file as subject to the "Classpath" exception as provided
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 * 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).
 *
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 *
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package java.nio.file.attribute;

/**
 * Defines the permissions for use with the permissions component of an ACL
 * {@link AclEntry entry}.
 *
 * @since 1.7
 */
// 实体访问权限
public enum AclEntryPermission {
    
    /**
     * Permission to read the data of the file.
     */
    READ_DATA,      // 从文件读取数据
    
    /**
     * Permission to modify the file's data.
     */
    WRITE_DATA,     // 向文件写入数据
    
    /**
     * Permission to append data to a file.
     */
    APPEND_DATA,    // 向文件追加数据
    
    /**
     * Permission to read the named attributes of a file.
     *
     * <p> <a href="http://www.ietf.org/rfc/rfc3530.txt">RFC&nbsp;3530: Network
     * File System (NFS) version 4 Protocol</a> defines <em>named attributes</em>
     * as opaque files associated with a file in the file system.
     */
    READ_NAMED_ATTRS,   // 从文件读取命名属性
    
    /**
     * Permission to write the named attributes of a file.
     *
     * <p> <a href="http://www.ietf.org/rfc/rfc3530.txt">RFC&nbsp;3530: Network
     * File System (NFS) version 4 Protocol</a> defines <em>named attributes</em>
     * as opaque files associated with a file in the file system.
     */
    WRITE_NAMED_ATTRS,  // 向文件写入命名属性
    
    /**
     * Permission to execute a file.
     */
    EXECUTE,    // 执行文件
    
    /**
     * Permission to delete a file or directory within a directory.
     */
    DELETE_CHILD,   // 删除子文件/子目录
    
    /**
     * The ability to read (non-acl) file attributes.
     */
    READ_ATTRIBUTES,    // 读取文件的非acl属性
    
    /**
     * The ability to write (non-acl) file attributes.
     */
    WRITE_ATTRIBUTES,   // 写入文件的非acl属性
    
    /**
     * Permission to delete the file.
     */
    DELETE,     // 删除文件
    
    /**
     * Permission to read the ACL attribute.
     */
    READ_ACL,   // 读取文件的acl属性
    
    /**
     * Permission to write the ACL attribute.
     */
    WRITE_ACL,  // 写入文件的acl属性
    
    /**
     * Permission to change the owner.
     */
    WRITE_OWNER,    // 改变文件的所有者
    
    /**
     * Permission to access file locally at the server with synchronous reads and writes.
     */
    SYNCHRONIZE;    // 同步读/写该文件，即在该文件上等待
    
    /**
     * Permission to list the entries of a directory (equal to {@link #READ_DATA})
     */
    public static final AclEntryPermission LIST_DIRECTORY = READ_DATA;      // 列出目录的权限
    
    /**
     * Permission to add a new file to a directory (equal to {@link #WRITE_DATA})
     */
    public static final AclEntryPermission ADD_FILE = WRITE_DATA;           // 向目录添加新文件的权限
    
    /**
     * Permission to create a subdirectory to a directory (equal to {@link #APPEND_DATA})
     */
    public static final AclEntryPermission ADD_SUBDIRECTORY = APPEND_DATA;  // 向目录添加子目录的权限
}