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 */ UnresolvedPermissionCollection()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 add(Permission permission)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 */ getUnresolvedPermissions(Permission p)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 */ implies(Permission permission)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 elements()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 */ writeObject(ObjectOutputStream out)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 */ readObject(ObjectInputStream in)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 Hashtable<String, Vector<UnresolvedPermission>> permissions = 201 (Hashtable<String, Vector<UnresolvedPermission>>)gfields.get("permissions", null); 202 perms = new HashMap<String, List<UnresolvedPermission>>(permissions.size()*2); 203 204 // Convert each entry (Vector) into a List 205 Set<Map.Entry<String, Vector<UnresolvedPermission>>> set = permissions.entrySet(); 206 for (Map.Entry<String, Vector<UnresolvedPermission>> e : set) { 207 // Convert Vector into ArrayList 208 Vector<UnresolvedPermission> vec = e.getValue(); 209 List<UnresolvedPermission> list = new ArrayList<>(vec.size()); 210 list.addAll(vec); 211 212 // Add to Hashtable being serialized 213 perms.put(e.getKey(), list); 214 } 215 } 216 } 217