1 /*
2 * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package java.security;
27
28 import java.io.IOException;
29 import java.io.ObjectInputStream;
30 import java.io.ObjectOutputStream;
31 import java.io.ObjectStreamField;
32 import java.util.*;
33 import java.util.concurrent.ConcurrentHashMap;
34 import java.util.concurrent.CopyOnWriteArrayList;
35
36 /**
37 * A UnresolvedPermissionCollection stores a collection
38 * of UnresolvedPermission permissions.
39 *
40 * @see java.security.Permission
41 * @see java.security.Permissions
42 * @see java.security.UnresolvedPermission
43 *
44 *
45 * @author Roland Schemers
46 * @since 1.2
47 *
48 * @serial include
49 */
50
51 final class UnresolvedPermissionCollection
52 extends PermissionCollection
53 implements java.io.Serializable
54 {
55 /**
56 * Key is permission type, value is a list of the UnresolvedPermissions
57 * of the same type.
58 * Not serialized; see serialization section at end of class.
59 */
60 private transient ConcurrentHashMap<String, List<UnresolvedPermission>> perms;
61
62 /**
63 * Create an empty UnresolvedPermissionCollection object.
64 *
65 */
66 public UnresolvedPermissionCollection() {
67 perms = new ConcurrentHashMap<>(11);
68 }
69
70 /**
71 * Adds a permission to this UnresolvedPermissionCollection.
72 * The key for the hash is the unresolved permission's type (class) name.
73 *
74 * @param permission the Permission object to add.
75 */
76 @Override
77 public void add(Permission permission) {
78 if (! (permission instanceof UnresolvedPermission))
79 throw new IllegalArgumentException("invalid permission: "+
80 permission);
81 UnresolvedPermission up = (UnresolvedPermission) permission;
82
83 // Add permission to map. NOTE: cannot use lambda for
84 // remappingFunction parameter until JDK-8076596 is fixed.
85 perms.compute(up.getName(),
86 new java.util.function.BiFunction<>() {
87 @Override
88 public List<UnresolvedPermission> apply(String key,
89 List<UnresolvedPermission> oldValue) {
90 if (oldValue == null) {
91 List<UnresolvedPermission> v =
92 new CopyOnWriteArrayList<>();
93 v.add(up);
94 return v;
95 } else {
96 oldValue.add(up);
97 return oldValue;
98 }
99 }
100 }
101 );
102 }
103
104 /**
105 * get any unresolved permissions of the same type as p,
106 * and return the List containing them.
107 */
108 List<UnresolvedPermission> getUnresolvedPermissions(Permission p) {
109 return perms.get(p.getClass().getName());
110 }
111
112 /**
113 * always returns false for unresolved permissions
114 *
115 */
116 @Override
117 public boolean implies(Permission permission) {
118 return false;
119 }
120
121 /**
122 * Returns an enumeration of all the UnresolvedPermission lists in the
123 * container.
124 *
125 * @return an enumeration of all the UnresolvedPermission objects.
126 */
127 @Override
128 public Enumeration<Permission> elements() {
129 List<Permission> results =
130 new ArrayList<>(); // where results are stored
131
132 // Get iterator of Map values (which are lists of permissions)
133 for (List<UnresolvedPermission> l : perms.values()) {
134 results.addAll(l);
135 }
136
137 return Collections.enumeration(results);
138 }
139
140 private static final long serialVersionUID = -7176153071733132400L;
141
142 // Need to maintain serialization interoperability with earlier releases,
143 // which had the serializable field:
144 // private Hashtable permissions; // keyed on type
145
146 /**
147 * @serialField permissions java.util.Hashtable
148 * A table of the UnresolvedPermissions keyed on type, value is Vector
149 * of permissions
150 */
151 private static final ObjectStreamField[] serialPersistentFields = {
152 new ObjectStreamField("permissions", Hashtable.class),
153 };
154
155 /**
156 * @serialData Default field.
157 */
158 /*
159 * Writes the contents of the perms field out as a Hashtable
160 * in which the values are Vectors for
161 * serialization compatibility with earlier releases.
162 */
163 private void writeObject(ObjectOutputStream out) throws IOException {
164 // Don't call out.defaultWriteObject()
165
166 // Copy perms into a Hashtable
167 Hashtable<String, Vector<UnresolvedPermission>> permissions =
168 new Hashtable<>(perms.size()*2);
169
170 // Convert each entry (List) into a Vector
171 Set<Map.Entry<String, List<UnresolvedPermission>>> set = perms.entrySet();
172 for (Map.Entry<String, List<UnresolvedPermission>> e : set) {
173 // Convert list into Vector
174 List<UnresolvedPermission> list = e.getValue();
175 Vector<UnresolvedPermission> vec = new Vector<>(list);
176
177 // Add to Hashtable being serialized
178 permissions.put(e.getKey(), vec);
179 }
180
181 // Write out serializable fields
182 ObjectOutputStream.PutField pfields = out.putFields();
183 pfields.put("permissions", permissions);
184 out.writeFields();
185 }
186
187 /*
188 * Reads in a Hashtable in which the values are Vectors of
189 * UnresolvedPermissions and saves them in the perms field.
190 */
191 private void readObject(ObjectInputStream in) throws IOException,
192 ClassNotFoundException {
193 // Don't call defaultReadObject()
194
195 // Read in serialized fields
196 ObjectInputStream.GetField gfields = in.readFields();
197
198 // Get permissions
199 @SuppressWarnings("unchecked")
200 // writeObject writes a Hashtable<String, Vector<UnresolvedPermission>>
201 // for the permissions key, so this cast is safe, unless the data is corrupt.
202 Hashtable<String, Vector<UnresolvedPermission>> permissions =
203 (Hashtable<String, Vector<UnresolvedPermission>>)
204 gfields.get("permissions", null);
205 perms = new ConcurrentHashMap<>(permissions.size()*2);
206
207 // Convert each entry (Vector) into a List
208 Set<Map.Entry<String, Vector<UnresolvedPermission>>> set = permissions.entrySet();
209 for (Map.Entry<String, Vector<UnresolvedPermission>> e : set) {
210 // Convert Vector into ArrayList
211 Vector<UnresolvedPermission> vec = e.getValue();
212 List<UnresolvedPermission> list = new CopyOnWriteArrayList<>(vec);
213
214 // Add to Hashtable being serialized
215 perms.put(e.getKey(), list);
216 }
217 }
218 }