1 /*
2 * Copyright (c) 1997, 2011, 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.util.*;
29 import java.io.ObjectStreamField;
30 import java.io.ObjectOutputStream;
31 import java.io.ObjectInputStream;
32 import java.io.IOException;
33
34 /**
35 * A UnresolvedPermissionCollection stores a collection
36 * of UnresolvedPermission permissions.
37 *
38 * @see java.security.Permission
39 * @see java.security.Permissions
40 * @see java.security.UnresolvedPermission
41 *
42 *
43 * @author Roland Schemers
44 *
45 * @serial include
46 */
47
48 final class UnresolvedPermissionCollection
49 extends PermissionCollection
50 implements java.io.Serializable
51 {
52 /**
53 * Key is permission type, value is a list of the UnresolvedPermissions
54 * of the same type.
55 * Not serialized; see serialization section at end of class.
56 */
57 private transient Map<String, List<UnresolvedPermission>> perms;
58
59 /**
60 * Create an empty UnresolvedPermissionCollection object.
61 *
62 */
63 public UnresolvedPermissionCollection() {
64 perms = new HashMap<String, List<UnresolvedPermission>>(11);
65 }
66
67 /**
68 * Adds a permission to this UnresolvedPermissionCollection.
69 * The key for the hash is the unresolved permission's type (class) name.
70 *
71 * @param permission the Permission object to add.
72 */
73
74 public void add(Permission permission)
75 {
76 if (! (permission instanceof UnresolvedPermission))
77 throw new IllegalArgumentException("invalid permission: "+
78 permission);
79 UnresolvedPermission up = (UnresolvedPermission) permission;
80
81 List<UnresolvedPermission> v;
82 synchronized (this) {
83 v = perms.get(up.getName());
84 if (v == null) {
85 v = new ArrayList<UnresolvedPermission>();
86 perms.put(up.getName(), v);
87 }
88 }
89 synchronized (v) {
90 v.add(up);
91 }
92 }
93
94 /**
95 * get any unresolved permissions of the same type as p,
96 * and return the List containing them.
97 */
98 List<UnresolvedPermission> getUnresolvedPermissions(Permission p) {
99 synchronized (this) {
100 return perms.get(p.getClass().getName());
101 }
102 }
103
104 /**
105 * always returns false for unresolved permissions
106 *
107 */
108 public boolean implies(Permission permission)
109 {
110 return false;
111 }
112
113 /**
114 * Returns an enumeration of all the UnresolvedPermission lists in the
115 * container.
116 *
117 * @return an enumeration of all the UnresolvedPermission objects.
118 */
119
120 public Enumeration<Permission> elements() {
121 List<Permission> results =
122 new ArrayList<>(); // where results are stored
123
124 // Get iterator of Map values (which are lists of permissions)
125 synchronized (this) {
126 for (List<UnresolvedPermission> l : perms.values()) {
127 synchronized (l) {
128 results.addAll(l);
129 }
130 }
131 }
132
133 return Collections.enumeration(results);
134 }
135
136 private static final long serialVersionUID = -7176153071733132400L;
137
138 // Need to maintain serialization interoperability with earlier releases,
139 // which had the serializable field:
140 // private Hashtable permissions; // keyed on type
141
142 /**
143 * @serialField permissions java.util.Hashtable
144 * A table of the UnresolvedPermissions keyed on type, value is Vector
145 * of permissions
146 */
147 private static final ObjectStreamField[] serialPersistentFields = {
148 new ObjectStreamField("permissions", Hashtable.class),
149 };
150
151 /**
152 * @serialData Default field.
153 */
154 /*
155 * Writes the contents of the perms field out as a Hashtable
156 * in which the values are Vectors for
157 * serialization compatibility with earlier releases.
158 */
159 private void writeObject(ObjectOutputStream out) throws IOException {
160 // Don't call out.defaultWriteObject()
161
162 // Copy perms into a Hashtable
163 Hashtable<String, Vector<UnresolvedPermission>> permissions =
164 new Hashtable<>(perms.size()*2);
165
166 // Convert each entry (List) into a Vector
167 synchronized (this) {
168 Set<Map.Entry<String, List<UnresolvedPermission>>> set = perms.entrySet();
169 for (Map.Entry<String, List<UnresolvedPermission>> e : set) {
170 // Convert list into Vector
171 List<UnresolvedPermission> list = e.getValue();
172 Vector<UnresolvedPermission> vec = new Vector<>(list.size());
173 synchronized (list) {
174 vec.addAll(list);
175 }
176
177 // Add to Hashtable being serialized
178 permissions.put(e.getKey(), vec);
179 }
180 }
181
182 // Write out serializable fields
183 ObjectOutputStream.PutField pfields = out.putFields();
184 pfields.put("permissions", permissions);
185 out.writeFields();
186 }
187
188 /*
189 * Reads in a Hashtable in which the values are Vectors of
190 * UnresolvedPermissions and saves them in the perms field.
191 */
192 private void readObject(ObjectInputStream in) throws IOException,
193 ClassNotFoundException {
194 // Don't call defaultReadObject()
195
196 // Read in serialized fields
197 ObjectInputStream.GetField gfields = in.readFields();
198
199 // Get permissions
200 @SuppressWarnings("unchecked")
201 // writeObject writes a Hashtable<String, Vector<UnresolvedPermission>>
202 // for the permissions key, so this cast is safe, unless the data is corrupt.
203 Hashtable<String, Vector<UnresolvedPermission>> permissions =
204 (Hashtable<String, Vector<UnresolvedPermission>>)
205 gfields.get("permissions", null);
206 perms = new HashMap<String, List<UnresolvedPermission>>(permissions.size()*2);
207
208 // Convert each entry (Vector) into a List
209 Set<Map.Entry<String, Vector<UnresolvedPermission>>> set = permissions.entrySet();
210 for (Map.Entry<String, Vector<UnresolvedPermission>> e : set) {
211 // Convert Vector into ArrayList
212 Vector<UnresolvedPermission> vec = e.getValue();
213 List<UnresolvedPermission> list = new ArrayList<>(vec.size());
214 list.addAll(vec);
215
216 // Add to Hashtable being serialized
217 perms.put(e.getKey(), list);
218 }
219 }
220 }