001 /**
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements. See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership. The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License. You may obtain a copy of the License at
009 *
010 * http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018 package org.apache.hadoop.fs.permission;
019
020 import org.apache.hadoop.classification.InterfaceAudience;
021 import org.apache.hadoop.classification.InterfaceStability;
022
023 /**
024 * Specifies the type of an ACL entry.
025 */
026 @InterfaceAudience.Public
027 @InterfaceStability.Evolving
028 public enum AclEntryType {
029 /**
030 * An ACL entry applied to a specific user. These ACL entries can be unnamed,
031 * which applies to the file owner, or named, which applies to the specific
032 * named user.
033 */
034 USER,
035
036 /**
037 * An ACL entry applied to a specific group. These ACL entries can be
038 * unnamed, which applies to the file's group, or named, which applies to the
039 * specific named group.
040 */
041 GROUP,
042
043 /**
044 * An ACL mask entry. Mask entries are unnamed. During permission checks,
045 * the mask entry interacts with all ACL entries that are members of the group
046 * class. This consists of all named user entries, the unnamed group entry,
047 * and all named group entries. For each such entry, any permissions that are
048 * absent from the mask entry are removed from the effective permissions used
049 * during the permission check.
050 */
051 MASK,
052
053 /**
054 * An ACL entry that applies to all other users that were not covered by one
055 * of the more specific ACL entry types.
056 */
057 OTHER;
058 }