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| 1 | /* | ||
| 2 | * Copyright (c) 1997, 2003, 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.util; | ||
| 27 | |||
| 28 | import java.io.Serializable; | ||
| 29 | import java.io.IOException; | ||
| 30 | import java.security.*; | ||
| 31 | import java.util.Map; | ||
| 32 | import java.util.HashMap; | ||
| 33 | import java.util.Enumeration; | ||
| 34 | import java.util.Hashtable; | ||
| 35 | import java.util.Collections; | ||
| 36 | import java.io.ObjectStreamField; | ||
| 37 | import java.io.ObjectOutputStream; | ||
| 38 | import java.io.ObjectInputStream; | ||
| 39 | import java.io.IOException; | ||
| 40 | import sun.security.util.SecurityConstants; | ||
| 41 | |||
| 42 | /** | ||
| 43 | * This class is for property permissions. | ||
| 44 | * | ||
| 45 | * <P> | ||
| 46 | * The name is the name of the property ("java.home", | ||
| 47 | * "os.name", etc). The naming | ||
| 48 | * convention follows the hierarchical property naming convention. | ||
| 49 | * Also, an asterisk | ||
| 50 | * may appear at the end of the name, following a ".", or by itself, to | ||
| 51 | * signify a wildcard match. For example: "java.*" or "*" is valid, | ||
| 52 | * "*java" or "a*b" is not valid. | ||
| 53 | * <P> | ||
| 54 | * <P> | ||
| 55 | * The actions to be granted are passed to the constructor in a string containing | ||
| 56 | * a list of one or more comma-separated keywords. The possible keywords are | ||
| 57 | * "read" and "write". Their meaning is defined as follows: | ||
| 58 | * <P> | ||
| 59 | * <DL> | ||
| 60 | * <DT> read | ||
| 61 | * <DD> read permission. Allows <code>System.getProperty</code> to | ||
| 62 | * be called. | ||
| 63 | * <DT> write | ||
| 64 | * <DD> write permission. Allows <code>System.setProperty</code> to | ||
| 65 | * be called. | ||
| 66 | * </DL> | ||
| 67 | * <P> | ||
| 68 | * The actions string is converted to lowercase before processing. | ||
| 69 | * <P> | ||
| 70 | * Care should be taken before granting code permission to access | ||
| 71 | * certain system properties. For example, granting permission to | ||
| 72 | * access the "java.home" system property gives potentially malevolent | ||
| 73 | * code sensitive information about the system environment (the Java | ||
| 74 | * installation directory). Also, granting permission to access | ||
| 75 | * the "user.name" and "user.home" system properties gives potentially | ||
| 76 | * malevolent code sensitive information about the user environment | ||
| 77 | * (the user's account name and home directory). | ||
| 78 | * | ||
| 79 | * @see java.security.BasicPermission | ||
| 80 | * @see java.security.Permission | ||
| 81 | * @see java.security.Permissions | ||
| 82 | * @see java.security.PermissionCollection | ||
| 83 | * @see java.lang.SecurityManager | ||
| 84 | * | ||
| 85 | * | ||
| 86 | * @author Roland Schemers | ||
| 87 | * @since 1.2 | ||
| 88 | * | ||
| 89 | * @serial exclude | ||
| 90 | */ | ||
| 91 | |||
| 92 | public final class PropertyPermission extends BasicPermission { | ||
| 93 | |||
| 94 | /** | ||
| 95 | * Read action. | ||
| 96 | */ | ||
| 97 | private final static int READ = 0x1; | ||
| 98 | |||
| 99 | /** | ||
| 100 | * Write action. | ||
| 101 | */ | ||
| 102 | private final static int WRITE = 0x2; | ||
| 103 | /** | ||
| 104 | * All actions (read,write); | ||
| 105 | */ | ||
| 106 | private final static int ALL = READ|WRITE; | ||
| 107 | /** | ||
| 108 | * No actions. | ||
| 109 | */ | ||
| 110 | private final static int NONE = 0x0; | ||
| 111 | |||
| 112 | /** | ||
| 113 | * The actions mask. | ||
| 114 | * | ||
| 115 | */ | ||
| 116 | private transient int mask; | ||
| 117 | |||
| 118 | /** | ||
| 119 | * The actions string. | ||
| 120 | * | ||
| 121 | * @serial | ||
| 122 | */ | ||
| 123 | private String actions; // Left null as long as possible, then | ||
| 124 | // created and re-used in the getAction function. | ||
| 125 | |||
| 126 | /** | ||
| 127 | * initialize a PropertyPermission object. Common to all constructors. | ||
| 128 | * Also called during de-serialization. | ||
| 129 | * | ||
| 130 | * @param mask the actions mask to use. | ||
| 131 | * | ||
| 132 | */ | ||
| 133 | |||
| 134 | private void init(int mask) | ||
| 135 | { | ||
| 136 | |||
| 137 | if ((mask & ALL) != mask) | ||
| 138 | throw new IllegalArgumentException("invalid actions mask"); | ||
| 139 | |||
| 140 | if (mask == NONE) | ||
| 141 | throw new IllegalArgumentException("invalid actions mask"); | ||
| 142 | |||
| 143 | if (getName() == null) | ||
| 144 | throw new NullPointerException("name can't be null"); | ||
| 145 | |||
| 146 | this.mask = mask; | ||
| 147 | } | ||
| 148 | |||
| 149 | /** | ||
| 150 | * Creates a new PropertyPermission object with the specified name. | ||
| 151 | * The name is the name of the system property, and | ||
| 152 | * <i>actions</i> contains a comma-separated list of the | ||
| 153 | * desired actions granted on the property. Possible actions are | ||
| 154 | * "read" and "write". | ||
| 155 | * | ||
| 156 | * @param name the name of the PropertyPermission. | ||
| 157 | * @param actions the actions string. | ||
| 158 | * | ||
| 159 | * @throws NullPointerException if <code>name</code> is <code>null</code>. | ||
| 160 | * @throws IllegalArgumentException if <code>name</code> is empty or if | ||
| 161 | * <code>actions</code> is invalid. | ||
| 162 | */ | ||
| 163 | |||
| 164 | public PropertyPermission(String name, String actions) | ||
| 165 | { | ||
| 166 | super(name,actions); | ||
| 167 | init(getMask(actions)); | ||
| 168 | } | ||
| 169 | |||
| 170 | /** | ||
| 171 | * Checks if this PropertyPermission object "implies" the specified | ||
| 172 | * permission. | ||
| 173 | * <P> | ||
| 174 | * More specifically, this method returns true if:<p> | ||
| 175 | * <ul> | ||
| 176 | * <li> <i>p</i> is an instanceof PropertyPermission,<p> | ||
| 177 | * <li> <i>p</i>'s actions are a subset of this | ||
| 178 | * object's actions, and <p> | ||
| 179 | * <li> <i>p</i>'s name is implied by this object's | ||
| 180 | * name. For example, "java.*" implies "java.home". | ||
| 181 | * </ul> | ||
| 182 | * @param p the permission to check against. | ||
| 183 | * | ||
| 184 | * @return true if the specified permission is implied by this object, | ||
| 185 | * false if not. | ||
| 186 | */ | ||
| 187 | public boolean implies(Permission p) { | ||
| 188 | if (!(p instanceof PropertyPermission)) | ||
| 189 | return false; | ||
| 190 | |||
| 191 | PropertyPermission that = (PropertyPermission) p; | ||
| 192 | |||
| 193 | // we get the effective mask. i.e., the "and" of this and that. | ||
| 194 | // They must be equal to that.mask for implies to return true. | ||
| 195 | |||
| 196 | return ((this.mask & that.mask) == that.mask) && super.implies(that); | ||
| 197 | } | ||
| 198 | |||
| 199 | |||
| 200 | /** | ||
| 201 | * Checks two PropertyPermission objects for equality. Checks that <i>obj</i> is | ||
| 202 | * a PropertyPermission, and has the same name and actions as this object. | ||
| 203 | * <P> | ||
| 204 | * @param obj the object we are testing for equality with this object. | ||
| 205 | * @return true if obj is a PropertyPermission, and has the same name and | ||
| 206 | * actions as this PropertyPermission object. | ||
| 207 | */ | ||
| 208 | public boolean equals(Object obj) { | ||
| 209 | if (obj == this) | ||
| 210 | return true; | ||
| 211 | |||
| 212 | if (! (obj instanceof PropertyPermission)) | ||
| 213 | return false; | ||
| 214 | |||
| 215 | PropertyPermission that = (PropertyPermission) obj; | ||
| 216 | |||
| 217 | return (this.mask == that.mask) && | ||
| 218 | (this.getName().equals(that.getName())); | ||
| 219 | } | ||
| 220 | |||
| 221 | /** | ||
| 222 | * Returns the hash code value for this object. | ||
| 223 | * The hash code used is the hash code of this permissions name, that is, | ||
| 224 | * <code>getName().hashCode()</code>, where <code>getName</code> is | ||
| 225 | * from the Permission superclass. | ||
| 226 | * | ||
| 227 | * @return a hash code value for this object. | ||
| 228 | */ | ||
| 229 | |||
| 230 | public int hashCode() { | ||
| 231 | return this.getName().hashCode(); | ||
| 232 | } | ||
| 233 | |||
| 234 | |||
| 235 | /** | ||
| 236 | * Converts an actions String to an actions mask. | ||
| 237 | * | ||
| 238 | * @param action the action string. | ||
| 239 | * @return the actions mask. | ||
| 240 | */ | ||
| 241 | private static int getMask(String actions) { | ||
| 242 | |||
| 243 | int mask = NONE; | ||
| 244 | |||
| 245 | if (actions == null) { | ||
| 246 | return mask; | ||
| 247 | } | ||
| 248 | |||
| 249 | // Check against use of constants (used heavily within the JDK) | ||
| 250 | if (actions == SecurityConstants.PROPERTY_READ_ACTION) { | ||
| 251 | return READ; | ||
| 252 | } if (actions == SecurityConstants.PROPERTY_WRITE_ACTION) { | ||
| 253 | return WRITE; | ||
| 254 | } else if (actions == SecurityConstants.PROPERTY_RW_ACTION) { | ||
| 255 | return READ|WRITE; | ||
| 256 | } | ||
| 257 | |||
| 258 | char[] a = actions.toCharArray(); | ||
| 259 | |||
| 260 | int i = a.length - 1; | ||
| 261 | if (i < 0) | ||
| 262 | return mask; | ||
| 263 | |||
| 264 | while (i != -1) { | ||
| 265 | char c; | ||
| 266 | |||
| 267 | // skip whitespace | ||
| 268 | while ((i!=-1) && ((c = a[i]) == ' ' || | ||
| 269 | c == '\r' || | ||
| 270 | c == '\n' || | ||
| 271 | c == '\f' || | ||
| 272 | c == '\t')) | ||
| 273 | i--; | ||
| 274 | |||
| 275 | // check for the known strings | ||
| 276 | int matchlen; | ||
| 277 | |||
| 278 | if (i >= 3 && (a[i-3] == 'r' || a[i-3] == 'R') && | ||
| 279 | (a[i-2] == 'e' || a[i-2] == 'E') && | ||
| 280 | (a[i-1] == 'a' || a[i-1] == 'A') && | ||
| 281 | (a[i] == 'd' || a[i] == 'D')) | ||
| 282 | { | ||
| 283 | matchlen = 4; | ||
| 284 | mask |= READ; | ||
| 285 | |||
| 286 | } else if (i >= 4 && (a[i-4] == 'w' || a[i-4] == 'W') && | ||
| 287 | (a[i-3] == 'r' || a[i-3] == 'R') && | ||
| 288 | (a[i-2] == 'i' || a[i-2] == 'I') && | ||
| 289 | (a[i-1] == 't' || a[i-1] == 'T') && | ||
| 290 | (a[i] == 'e' || a[i] == 'E')) | ||
| 291 | { | ||
| 292 | matchlen = 5; | ||
| 293 | mask |= WRITE; | ||
| 294 | |||
| 295 | } else { | ||
| 296 | // parse error | ||
| 297 | throw new IllegalArgumentException( | ||
| 298 | "invalid permission: " + actions); | ||
| 299 | } | ||
| 300 | |||
| 301 | // make sure we didn't just match the tail of a word | ||
| 302 | // like "ackbarfaccept". Also, skip to the comma. | ||
| 303 | boolean seencomma = false; | ||
| 304 | while (i >= matchlen && !seencomma) { | ||
| 305 | switch(a[i-matchlen]) { | ||
| 306 | case ',': | ||
| 307 | seencomma = true; | ||
| 308 | /*FALLTHROUGH*/ | ||
| 309 | case ' ': case '\r': case '\n': | ||
| 310 | case '\f': case '\t': | ||
| 311 | break; | ||
| 312 | default: | ||
| 313 | throw new IllegalArgumentException( | ||
| 314 | "invalid permission: " + actions); | ||
| 315 | } | ||
| 316 | i--; | ||
| 317 | } | ||
| 318 | |||
| 319 | // point i at the location of the comma minus one (or -1). | ||
| 320 | i -= matchlen; | ||
| 321 | } | ||
| 322 | |||
| 323 | return mask; | ||
| 324 | } | ||
| 325 | |||
| 326 | |||
| 327 | /** | ||
| 328 | * Return the canonical string representation of the actions. | ||
| 329 | * Always returns present actions in the following order: | ||
| 330 | * read, write. | ||
| 331 | * | ||
| 332 | * @return the canonical string representation of the actions. | ||
| 333 | */ | ||
| 334 | static String getActions(int mask) | ||
| 335 | { | ||
| 336 | StringBuilder sb = new StringBuilder(); | ||
| 337 | boolean comma = false; | ||
| 338 | |||
| 339 | if ((mask & READ) == READ) { | ||
| 340 | comma = true; | ||
| 341 | sb.append("read"); | ||
| 342 | } | ||
| 343 | |||
| 344 | if ((mask & WRITE) == WRITE) { | ||
| 345 | if (comma) sb.append(','); | ||
| 346 | else comma = true; | ||
| 347 | sb.append("write"); | ||
| 348 | } | ||
| 349 | return sb.toString(); | ||
| 350 | } | ||
| 351 | |||
| 352 | /** | ||
| 353 | * Returns the "canonical string representation" of the actions. | ||
| 354 | * That is, this method always returns present actions in the following order: | ||
| 355 | * read, write. For example, if this PropertyPermission object | ||
| 356 | * allows both write and read actions, a call to <code>getActions</code> | ||
| 357 | * will return the string "read,write". | ||
| 358 | * | ||
| 359 | * @return the canonical string representation of the actions. | ||
| 360 | */ | ||
| 361 | public String getActions() | ||
| 362 | { | ||
| 363 | if (actions == null) | ||
| 364 | actions = getActions(this.mask); | ||
| 365 | |||
| 366 | return actions; | ||
| 367 | } | ||
| 368 | |||
| 369 | /** | ||
| 370 | * Return the current action mask. | ||
| 371 | * Used by the PropertyPermissionCollection | ||
| 372 | * | ||
| 373 | * @return the actions mask. | ||
| 374 | */ | ||
| 375 | |||
| 376 | int getMask() { | ||
| 377 | return mask; | ||
| 378 | } | ||
| 379 | |||
| 380 | /** | ||
| 381 | * Returns a new PermissionCollection object for storing | ||
| 382 | * PropertyPermission objects. | ||
| 383 | * <p> | ||
| 384 | * | ||
| 385 | * @return a new PermissionCollection object suitable for storing | ||
| 386 | * PropertyPermissions. | ||
| 387 | */ | ||
| 388 | |||
| 389 | public PermissionCollection newPermissionCollection() { | ||
| 390 | return new PropertyPermissionCollection(); | ||
| 391 | } | ||
| 392 | |||
| 393 | |||
| 394 | private static final long serialVersionUID = 885438825399942851L; | ||
| 395 | |||
| 396 | /** | ||
| 397 | * WriteObject is called to save the state of the PropertyPermission | ||
| 398 | * to a stream. The actions are serialized, and the superclass | ||
| 399 | * takes care of the name. | ||
| 400 | */ | ||
| 401 | private synchronized void writeObject(java.io.ObjectOutputStream s) | ||
| 402 | throws IOException | ||
| 403 | { | ||
| 404 | // Write out the actions. The superclass takes care of the name | ||
| 405 | // call getActions to make sure actions field is initialized | ||
| 406 | if (actions == null) | ||
| 407 | getActions(); | ||
| 408 | s.defaultWriteObject(); | ||
| 409 | } | ||
| 410 | |||
| 411 | /** | ||
| 412 | * readObject is called to restore the state of the PropertyPermission from | ||
| 413 | * a stream. | ||
| 414 | */ | ||
| 415 | private synchronized void readObject(java.io.ObjectInputStream s) | ||
| 416 | throws IOException, ClassNotFoundException | ||
| 417 | { | ||
| 418 | // Read in the action, then initialize the rest | ||
| 419 | s.defaultReadObject(); | ||
| 420 | init(getMask(actions)); | ||
| 421 | } | ||
| 422 | } | ||
| 423 | |||
| 424 | /** | ||
| 425 | * A PropertyPermissionCollection stores a set of PropertyPermission | ||
| 426 | * permissions. | ||
| 427 | * | ||
| 428 | * @see java.security.Permission | ||
| 429 | * @see java.security.Permissions | ||
| 430 | * @see java.security.PermissionCollection | ||
| 431 | * | ||
| 432 | * | ||
| 433 | * @author Roland Schemers | ||
| 434 | * | ||
| 435 | * @serial include | ||
| 436 | */ | ||
| 437 | final class PropertyPermissionCollection extends PermissionCollection | ||
| 438 | implements Serializable | ||
| 439 | { | ||
| 440 | |||
| 441 | /** | ||
| 442 | * Key is property name; value is PropertyPermission. | ||
| 443 | * Not serialized; see serialization section at end of class. | ||
| 444 | */ | ||
| 445 | private transient Map perms; | ||
| 446 | |||
| 447 | /** | ||
| 448 | * Boolean saying if "*" is in the collection. | ||
| 449 | * | ||
| 450 | * @see #serialPersistentFields | ||
| 451 | */ | ||
| 452 | // No sync access; OK for this to be stale. | ||
| 453 | private boolean all_allowed; | ||
| 454 | |||
| 455 | /** | ||
| 456 | * Create an empty PropertyPermissions object. | ||
| 457 | * | ||
| 458 | */ | ||
| 459 | |||
| 460 | public PropertyPermissionCollection() { | ||
| 461 | perms = new HashMap(32); // Capacity for default policy | ||
| 462 | all_allowed = false; | ||
| 463 | } | ||
| 464 | |||
| 465 | /** | ||
| 466 | * Adds a permission to the PropertyPermissions. The key for the hash is | ||
| 467 | * the name. | ||
| 468 | * | ||
| 469 | * @param permission the Permission object to add. | ||
| 470 | * | ||
| 471 | * @exception IllegalArgumentException - if the permission is not a | ||
| 472 | * PropertyPermission | ||
| 473 | * | ||
| 474 | * @exception SecurityException - if this PropertyPermissionCollection | ||
| 475 | * object has been marked readonly | ||
| 476 | */ | ||
| 477 | |||
| 478 | public void add(Permission permission) | ||
| 479 | { | ||
| 480 | if (! (permission instanceof PropertyPermission)) | ||
| 481 | throw new IllegalArgumentException("invalid permission: "+ | ||
| 482 | permission); | ||
| 483 | if (isReadOnly()) | ||
| 484 | throw new SecurityException( | ||
| 485 | "attempt to add a Permission to a readonly PermissionCollection"); | ||
| 486 | |||
| 487 | PropertyPermission pp = (PropertyPermission) permission; | ||
| 488 | String propName = pp.getName(); | ||
| 489 | |||
| 490 | synchronized (this) { | ||
| 491 | PropertyPermission existing = (PropertyPermission) perms.get(propName); | ||
| 492 | |||
| 493 | if (existing != null) { | ||
| 494 | int oldMask = existing.getMask(); | ||
| 495 | int newMask = pp.getMask(); | ||
| 496 | if (oldMask != newMask) { | ||
| 497 | int effective = oldMask | newMask; | ||
| 498 | String actions = PropertyPermission.getActions(effective); | ||
| 499 | perms.put(propName, new PropertyPermission(propName, actions)); | ||
| 500 | } | ||
| 501 | } else { | ||
| 502 | perms.put(propName, permission); | ||
| 503 | } | ||
| 504 | } | ||
| 505 | |||
| 506 | if (!all_allowed) { | ||
| 507 | if (propName.equals("*")) | ||
| 508 | all_allowed = true; | ||
| 509 | } | ||
| 510 | } | ||
| 511 | |||
| 512 | /** | ||
| 513 | * Check and see if this set of permissions implies the permissions | ||
| 514 | * expressed in "permission". | ||
| 515 | * | ||
| 516 | * @param p the Permission object to compare | ||
| 517 | * | ||
| 518 | * @return true if "permission" is a proper subset of a permission in | ||
| 519 | * the set, false if not. | ||
| 520 | */ | ||
| 521 | |||
| 522 | public boolean implies(Permission permission) | ||
| 523 | { | ||
| 524 | if (! (permission instanceof PropertyPermission)) | ||
| 525 | return false; | ||
| 526 | |||
| 527 | PropertyPermission pp = (PropertyPermission) permission; | ||
| 528 | PropertyPermission x; | ||
| 529 | |||
| 530 | int desired = pp.getMask(); | ||
| 531 | int effective = 0; | ||
| 532 | |||
| 533 | // short circuit if the "*" Permission was added | ||
| 534 | if (all_allowed) { | ||
| 535 | synchronized (this) { | ||
| 536 | x = (PropertyPermission) perms.get("*"); | ||
| 537 | } | ||
| 538 | if (x != null) { | ||
| 539 | effective |= x.getMask(); | ||
| 540 | if ((effective & desired) == desired) | ||
| 541 | return true; | ||
| 542 | } | ||
| 543 | } | ||
| 544 | |||
| 545 | // strategy: | ||
| 546 | // Check for full match first. Then work our way up the | ||
| 547 | // name looking for matches on a.b.* | ||
| 548 | |||
| 549 | String name = pp.getName(); | ||
| 550 | //System.out.println("check "+name); | ||
| 551 | |||
| 552 | synchronized (this) { | ||
| 553 | x = (PropertyPermission) perms.get(name); | ||
| 554 | } | ||
| 555 | |||
| 556 | if (x != null) { | ||
| 557 | // we have a direct hit! | ||
| 558 | effective |= x.getMask(); | ||
| 559 | if ((effective & desired) == desired) | ||
| 560 | return true; | ||
| 561 | } | ||
| 562 | |||
| 563 | // work our way up the tree... | ||
| 564 | int last, offset; | ||
| 565 | |||
| 566 | offset = name.length()-1; | ||
| 567 | |||
| 568 | while ((last = name.lastIndexOf(".", offset)) != -1) { | ||
| 569 | |||
| 570 | name = name.substring(0, last+1) + "*"; | ||
| 571 | //System.out.println("check "+name); | ||
| 572 | synchronized (this) { | ||
| 573 | x = (PropertyPermission) perms.get(name); | ||
| 574 | } | ||
| 575 | |||
| 576 | if (x != null) { | ||
| 577 | effective |= x.getMask(); | ||
| 578 | if ((effective & desired) == desired) | ||
| 579 | return true; | ||
| 580 | } | ||
| 581 | offset = last -1; | ||
| 582 | } | ||
| 583 | |||
| 584 | // we don't have to check for "*" as it was already checked | ||
| 585 | // at the top (all_allowed), so we just return false | ||
| 586 | return false; | ||
| 587 | } | ||
| 588 | |||
| 589 | /** | ||
| 590 | * Returns an enumeration of all the PropertyPermission objects in the | ||
| 591 | * container. | ||
| 592 | * | ||
| 593 | * @return an enumeration of all the PropertyPermission objects. | ||
| 594 | */ | ||
| 595 | |||
| 596 | public Enumeration elements() { | ||
| 597 | // Convert Iterator of Map values into an Enumeration | ||
| 598 | synchronized (this) { | ||
| 599 | return Collections.enumeration(perms.values()); | ||
| 600 | } | ||
| 601 | } | ||
| 602 | |||
| 603 | private static final long serialVersionUID = 7015263904581634791L; | ||
| 604 | |||
| 605 | // Need to maintain serialization interoperability with earlier releases, | ||
| 606 | // which had the serializable field: | ||
| 607 | // | ||
| 608 | // Table of permissions. | ||
| 609 | // | ||
| 610 | // @serial | ||
| 611 | // | ||
| 612 | // private Hashtable permissions; | ||
| 613 | /** | ||
| 614 | * @serialField permissions java.util.Hashtable | ||
| 615 | * A table of the PropertyPermissions. | ||
| 616 | * @serialField all_allowed boolean | ||
| 617 | * boolean saying if "*" is in the collection. | ||
| 618 | */ | ||
| 619 | private static final ObjectStreamField[] serialPersistentFields = { | ||
| 620 | new ObjectStreamField("permissions", Hashtable.class), | ||
| 621 | new ObjectStreamField("all_allowed", Boolean.TYPE), | ||
| 622 | }; | ||
| 623 | |||
| 624 | /** | ||
| 625 | * @serialData Default fields. | ||
| 626 | */ | ||
| 627 | /* | ||
| 628 | * Writes the contents of the perms field out as a Hashtable for | ||
| 629 | * serialization compatibility with earlier releases. all_allowed | ||
| 630 | * unchanged. | ||
| 631 | */ | ||
| 632 | private void writeObject(ObjectOutputStream out) throws IOException { | ||
| 633 | // Don't call out.defaultWriteObject() | ||
| 634 | |||
| 635 | // Copy perms into a Hashtable | ||
| 636 | Hashtable permissions = new Hashtable(perms.size()*2); | ||
| 637 | synchronized (this) { | ||
| 638 | permissions.putAll(perms); | ||
| 639 | } | ||
| 640 | |||
| 641 | // Write out serializable fields | ||
| 642 | ObjectOutputStream.PutField pfields = out.putFields(); | ||
| 643 | pfields.put("all_allowed", all_allowed); | ||
| 644 | pfields.put("permissions", permissions); | ||
| 645 | out.writeFields(); | ||
| 646 | } | ||
| 647 | |||
| 648 | /* | ||
| 649 | * Reads in a Hashtable of PropertyPermissions and saves them in the | ||
| 650 | * perms field. Reads in all_allowed. | ||
| 651 | */ | ||
| 652 | private void readObject(ObjectInputStream in) throws IOException, | ||
| 653 | ClassNotFoundException { | ||
| 654 | // Don't call defaultReadObject() | ||
| 655 | |||
| 656 | // Read in serialized fields | ||
| 657 | ObjectInputStream.GetField gfields = in.readFields(); | ||
| 658 | |||
| 659 | // Get all_allowed | ||
| 660 | all_allowed = gfields.get("all_allowed", false); | ||
| 661 | |||
| 662 | // Get permissions | ||
| 663 | Hashtable permissions = (Hashtable)gfields.get("permissions", null); | ||
| 664 | perms = new HashMap(permissions.size()*2); | ||
| 665 | perms.putAll(permissions); | ||
| 666 | } | ||
| 667 | } | ||