J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1997-2006 Sun Microsystems, Inc. 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. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any 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<Permission>(); // 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<String, Vector<UnresolvedPermission>>(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 = |
| 173 | new Vector<UnresolvedPermission>(list.size()); |
| 174 | synchronized (list) { |
| 175 | vec.addAll(list); |
| 176 | } |
| 177 | |
| 178 | // Add to Hashtable being serialized |
| 179 | permissions.put(e.getKey(), vec); |
| 180 | } |
| 181 | } |
| 182 | |
| 183 | // Write out serializable fields |
| 184 | ObjectOutputStream.PutField pfields = out.putFields(); |
| 185 | pfields.put("permissions", permissions); |
| 186 | out.writeFields(); |
| 187 | } |
| 188 | |
| 189 | /* |
| 190 | * Reads in a Hashtable in which the values are Vectors of |
| 191 | * UnresolvedPermissions and saves them in the perms field. |
| 192 | */ |
| 193 | private void readObject(ObjectInputStream in) throws IOException, |
| 194 | ClassNotFoundException { |
| 195 | // Don't call defaultReadObject() |
| 196 | |
| 197 | // Read in serialized fields |
| 198 | ObjectInputStream.GetField gfields = in.readFields(); |
| 199 | |
| 200 | // Get permissions |
| 201 | Hashtable<String, Vector<UnresolvedPermission>> permissions = |
| 202 | (Hashtable<String, Vector<UnresolvedPermission>>)gfields.get("permissions", null); |
| 203 | perms = new HashMap<String, List<UnresolvedPermission>>(permissions.size()*2); |
| 204 | |
| 205 | // Convert each entry (Vector) into a List |
| 206 | Set<Map.Entry<String, Vector<UnresolvedPermission>>> set = permissions.entrySet(); |
| 207 | for (Map.Entry<String, Vector<UnresolvedPermission>> e : set) { |
| 208 | // Convert Vector into ArrayList |
| 209 | Vector<UnresolvedPermission> vec = e.getValue(); |
| 210 | List<UnresolvedPermission> list = |
| 211 | new ArrayList<UnresolvedPermission>(vec.size()); |
| 212 | list.addAll(vec); |
| 213 | |
| 214 | // Add to Hashtable being serialized |
| 215 | perms.put(e.getKey(), list); |
| 216 | } |
| 217 | } |
| 218 | } |