1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 *
19 */
20 package org.apache.directory.server.core.authz.support;
21
22
23 import java.util.ArrayList;
24 import java.util.Collection;
25
26 import javax.naming.NamingException;
27
28 import org.apache.directory.server.core.entry.ServerEntry;
29 import org.apache.directory.server.core.interceptor.context.OperationContext;
30 import org.apache.directory.server.schema.registries.Registries;
31 import org.apache.directory.shared.ldap.aci.ACITuple;
32 import org.apache.directory.shared.ldap.aci.MicroOperation;
33 import org.apache.directory.shared.ldap.aci.ProtectedItem;
34 import org.apache.directory.shared.ldap.constants.AuthenticationLevel;
35 import org.apache.directory.shared.ldap.entry.Value;
36 import org.apache.directory.shared.ldap.name.LdapDN;
37
38
39 /**
40 * An {@link ACITupleFilter} that chooses the tuples with the most specific
41 * protected item. (18.8.4.3, X.501)
42 * <p>
43 * If more than one tuple remains, choose the tuples with the most specific
44 * protected item. If the protected item is an attribute and there are tuples
45 * that specify the attribute type explicitly, discard all other tuples. If
46 * the protected item is an attribute value, and there are tuples that specify
47 * the attribute value explicitly, discard all other tuples. A protected item
48 * which is a rangeOfValues is to be treated as specifying an attribute value
49 * explicitly.
50 *
51 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
52 * @version $Rev: 662440 $, $Date: 2008-06-02 16:00:23 +0200 (Mo, 02 Jun 2008) $
53 */
54 public class MostSpecificProtectedItemFilter implements ACITupleFilter
55 {
56 public Collection<ACITuple> filter(
57 Registries registries,
58 Collection<ACITuple> tuples,
59 OperationScope scope,
60 OperationContext opContext,
61 Collection<LdapDN> userGroupNames,
62 LdapDN userName,
63 ServerEntry userEntry,
64 AuthenticationLevel authenticationLevel,
65 LdapDN entryName,
66 String attrId,
67 Value<?> attrValue,
68 ServerEntry entry,
69 Collection<MicroOperation> microOperations,
70 ServerEntry entryView )
71 throws NamingException
72 {
73 if ( tuples.size() <= 1 )
74 {
75 return tuples;
76 }
77
78 Collection<ACITuple> filteredTuples = new ArrayList<ACITuple>();
79
80 // If the protected item is an attribute and there are tuples that
81 // specify the attribute type explicitly, discard all other tuples.
82 for ( ACITuple tuple:tuples )
83 {
84 for ( ProtectedItem item:tuple.getProtectedItems() )
85 {
86 if ( item instanceof ProtectedItem.AttributeType || item instanceof ProtectedItem.AllAttributeValues
87 || item instanceof ProtectedItem.SelfValue || item instanceof ProtectedItem.AttributeValue )
88 {
89 filteredTuples.add( tuple );
90 break;
91 }
92 }
93 }
94
95 if ( filteredTuples.size() > 0 )
96 {
97 return filteredTuples;
98 }
99
100 // If the protected item is an attribute value, and there are tuples
101 // that specify the attribute value explicitly, discard all other tuples.
102 // A protected item which is a rangeOfValues is to be treated as
103 // specifying an attribute value explicitly.
104 for ( ACITuple tuple:tuples )
105 {
106 for ( ProtectedItem item:tuple.getProtectedItems() )
107 {
108 if ( item instanceof ProtectedItem.RangeOfValues )
109 {
110 filteredTuples.add( tuple );
111 }
112 }
113 }
114
115 if ( filteredTuples.size() > 0 )
116 {
117 return filteredTuples;
118 }
119
120 return tuples;
121 }
122 }