J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1999-2002 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 javax.naming; |
| 27 | |
| 28 | import java.util.Vector; |
| 29 | import java.util.Enumeration; |
| 30 | import java.util.Properties; |
| 31 | import java.util.NoSuchElementException; |
| 32 | |
| 33 | /** |
| 34 | * The implementation class for CompoundName and CompositeName. |
| 35 | * This class is package private. |
| 36 | * |
| 37 | * @author Rosanna Lee |
| 38 | * @author Scott Seligman |
| 39 | * @author Aravindan Ranganathan |
| 40 | * @since 1.3 |
| 41 | */ |
| 42 | |
| 43 | class NameImpl { |
| 44 | private static final byte LEFT_TO_RIGHT = 1; |
| 45 | private static final byte RIGHT_TO_LEFT = 2; |
| 46 | private static final byte FLAT = 0; |
| 47 | |
| 48 | private Vector components; |
| 49 | |
| 50 | private byte syntaxDirection = LEFT_TO_RIGHT; |
| 51 | private String syntaxSeparator = "/"; |
| 52 | private String syntaxSeparator2 = null; |
| 53 | private boolean syntaxCaseInsensitive = false; |
| 54 | private boolean syntaxTrimBlanks = false; |
| 55 | private String syntaxEscape = "\\"; |
| 56 | private String syntaxBeginQuote1 = "\""; |
| 57 | private String syntaxEndQuote1 = "\""; |
| 58 | private String syntaxBeginQuote2 = "'"; |
| 59 | private String syntaxEndQuote2 = "'"; |
| 60 | private String syntaxAvaSeparator = null; |
| 61 | private String syntaxTypevalSeparator = null; |
| 62 | |
| 63 | // escapingStyle gives the method used at creation time for |
| 64 | // quoting or escaping characters in the name. It is set to the |
| 65 | // first style of quote or escape encountered if and when the name |
| 66 | // is parsed. |
| 67 | private static final int STYLE_NONE = 0; |
| 68 | private static final int STYLE_QUOTE1 = 1; |
| 69 | private static final int STYLE_QUOTE2 = 2; |
| 70 | private static final int STYLE_ESCAPE = 3; |
| 71 | private int escapingStyle = STYLE_NONE; |
| 72 | |
| 73 | // Returns true if "match" is not null, and n contains "match" at |
| 74 | // position i. |
| 75 | private final boolean isA(String n, int i, String match) { |
| 76 | return (match != null && n.startsWith(match, i)); |
| 77 | } |
| 78 | |
| 79 | private final boolean isMeta(String n, int i) { |
| 80 | return (isA(n, i, syntaxEscape) || |
| 81 | isA(n, i, syntaxBeginQuote1) || |
| 82 | isA(n, i, syntaxBeginQuote2) || |
| 83 | isSeparator(n, i)); |
| 84 | } |
| 85 | |
| 86 | private final boolean isSeparator(String n, int i) { |
| 87 | return (isA(n, i, syntaxSeparator) || |
| 88 | isA(n, i, syntaxSeparator2)); |
| 89 | } |
| 90 | |
| 91 | private final int skipSeparator(String name, int i) { |
| 92 | if (isA(name, i, syntaxSeparator)) { |
| 93 | i += syntaxSeparator.length(); |
| 94 | } else if (isA(name, i, syntaxSeparator2)) { |
| 95 | i += syntaxSeparator2.length(); |
| 96 | } |
| 97 | return (i); |
| 98 | } |
| 99 | |
| 100 | private final int extractComp(String name, int i, int len, Vector comps) |
| 101 | throws InvalidNameException { |
| 102 | String beginQuote; |
| 103 | String endQuote; |
| 104 | boolean start = true; |
| 105 | boolean one = false; |
| 106 | StringBuffer answer = new StringBuffer(len); |
| 107 | |
| 108 | while (i < len) { |
| 109 | // handle quoted strings |
| 110 | if (start && ((one = isA(name, i, syntaxBeginQuote1)) || |
| 111 | isA(name, i, syntaxBeginQuote2))) { |
| 112 | |
| 113 | // record choice of quote chars being used |
| 114 | beginQuote = one ? syntaxBeginQuote1 : syntaxBeginQuote2; |
| 115 | endQuote = one ? syntaxEndQuote1 : syntaxEndQuote2; |
| 116 | if (escapingStyle == STYLE_NONE) { |
| 117 | escapingStyle = one ? STYLE_QUOTE1 : STYLE_QUOTE2; |
| 118 | } |
| 119 | |
| 120 | // consume string until matching quote |
| 121 | for (i += beginQuote.length(); |
| 122 | ((i < len) && !name.startsWith(endQuote, i)); |
| 123 | i++) { |
| 124 | // skip escape character if it is escaping ending quote |
| 125 | // otherwise leave as is. |
| 126 | if (isA(name, i, syntaxEscape) && |
| 127 | isA(name, i + syntaxEscape.length(), endQuote)) { |
| 128 | i += syntaxEscape.length(); |
| 129 | } |
| 130 | answer.append(name.charAt(i)); // copy char |
| 131 | } |
| 132 | |
| 133 | // no ending quote found |
| 134 | if (i >= len) |
| 135 | throw |
| 136 | new InvalidNameException(name + ": no close quote"); |
| 137 | // new Exception("no close quote"); |
| 138 | |
| 139 | i += endQuote.length(); |
| 140 | |
| 141 | // verify that end-quote occurs at separator or end of string |
| 142 | if (i == len || isSeparator(name, i)) { |
| 143 | break; |
| 144 | } |
| 145 | // throw (new Exception( |
| 146 | throw (new InvalidNameException(name + |
| 147 | ": close quote appears before end of component")); |
| 148 | |
| 149 | } else if (isSeparator(name, i)) { |
| 150 | break; |
| 151 | |
| 152 | } else if (isA(name, i, syntaxEscape)) { |
| 153 | if (isMeta(name, i + syntaxEscape.length())) { |
| 154 | // if escape precedes meta, consume escape and let |
| 155 | // meta through |
| 156 | i += syntaxEscape.length(); |
| 157 | if (escapingStyle == STYLE_NONE) { |
| 158 | escapingStyle = STYLE_ESCAPE; |
| 159 | } |
| 160 | } else if (i + syntaxEscape.length() >= len) { |
| 161 | throw (new InvalidNameException(name + |
| 162 | ": unescaped " + syntaxEscape + " at end of component")); |
| 163 | } |
| 164 | } else if (isA(name, i, syntaxTypevalSeparator) && |
| 165 | ((one = isA(name, i+syntaxTypevalSeparator.length(), syntaxBeginQuote1)) || |
| 166 | isA(name, i+syntaxTypevalSeparator.length(), syntaxBeginQuote2))) { |
| 167 | // Handle quote occurring after typeval separator |
| 168 | beginQuote = one ? syntaxBeginQuote1 : syntaxBeginQuote2; |
| 169 | endQuote = one ? syntaxEndQuote1 : syntaxEndQuote2; |
| 170 | |
| 171 | i += syntaxTypevalSeparator.length(); |
| 172 | answer.append(syntaxTypevalSeparator+beginQuote); // add back |
| 173 | |
| 174 | // consume string until matching quote |
| 175 | for (i += beginQuote.length(); |
| 176 | ((i < len) && !name.startsWith(endQuote, i)); |
| 177 | i++) { |
| 178 | // skip escape character if it is escaping ending quote |
| 179 | // otherwise leave as is. |
| 180 | if (isA(name, i, syntaxEscape) && |
| 181 | isA(name, i + syntaxEscape.length(), endQuote)) { |
| 182 | i += syntaxEscape.length(); |
| 183 | } |
| 184 | answer.append(name.charAt(i)); // copy char |
| 185 | } |
| 186 | |
| 187 | // no ending quote found |
| 188 | if (i >= len) |
| 189 | throw |
| 190 | new InvalidNameException(name + ": typeval no close quote"); |
| 191 | |
| 192 | i += endQuote.length(); |
| 193 | answer.append(endQuote); // add back |
| 194 | |
| 195 | // verify that end-quote occurs at separator or end of string |
| 196 | if (i == len || isSeparator(name, i)) { |
| 197 | break; |
| 198 | } |
| 199 | throw (new InvalidNameException(name.substring(i) + |
| 200 | ": typeval close quote appears before end of component")); |
| 201 | } |
| 202 | |
| 203 | answer.append(name.charAt(i++)); |
| 204 | start = false; |
| 205 | } |
| 206 | |
| 207 | if (syntaxDirection == RIGHT_TO_LEFT) |
| 208 | comps.insertElementAt(answer.toString(), 0); |
| 209 | else |
| 210 | comps.addElement(answer.toString()); |
| 211 | return i; |
| 212 | } |
| 213 | |
| 214 | private static boolean getBoolean(Properties p, String name) { |
| 215 | return toBoolean(p.getProperty(name)); |
| 216 | } |
| 217 | |
| 218 | private static boolean toBoolean(String name) { |
| 219 | return ((name != null) && name.toLowerCase().equals("true")); |
| 220 | } |
| 221 | |
| 222 | private final void recordNamingConvention(Properties p) { |
| 223 | String syntaxDirectionStr = |
| 224 | p.getProperty("jndi.syntax.direction", "flat"); |
| 225 | if (syntaxDirectionStr.equals("left_to_right")) { |
| 226 | syntaxDirection = LEFT_TO_RIGHT; |
| 227 | } else if (syntaxDirectionStr.equals("right_to_left")) { |
| 228 | syntaxDirection = RIGHT_TO_LEFT; |
| 229 | } else if (syntaxDirectionStr.equals("flat")) { |
| 230 | syntaxDirection = FLAT; |
| 231 | } else { |
| 232 | throw new IllegalArgumentException(syntaxDirectionStr + |
| 233 | "is not a valid value for the jndi.syntax.direction property"); |
| 234 | } |
| 235 | |
| 236 | if (syntaxDirection != FLAT) { |
| 237 | syntaxSeparator = p.getProperty("jndi.syntax.separator"); |
| 238 | syntaxSeparator2 = p.getProperty("jndi.syntax.separator2"); |
| 239 | if (syntaxSeparator == null) { |
| 240 | throw new IllegalArgumentException( |
| 241 | "jndi.syntax.separator property required for non-flat syntax"); |
| 242 | } |
| 243 | } else { |
| 244 | syntaxSeparator = null; |
| 245 | } |
| 246 | syntaxEscape = p.getProperty("jndi.syntax.escape"); |
| 247 | |
| 248 | syntaxCaseInsensitive = getBoolean(p, "jndi.syntax.ignorecase"); |
| 249 | syntaxTrimBlanks = getBoolean(p, "jndi.syntax.trimblanks"); |
| 250 | |
| 251 | syntaxBeginQuote1 = p.getProperty("jndi.syntax.beginquote"); |
| 252 | syntaxEndQuote1 = p.getProperty("jndi.syntax.endquote"); |
| 253 | if (syntaxEndQuote1 == null && syntaxBeginQuote1 != null) |
| 254 | syntaxEndQuote1 = syntaxBeginQuote1; |
| 255 | else if (syntaxBeginQuote1 == null && syntaxEndQuote1 != null) |
| 256 | syntaxBeginQuote1 = syntaxEndQuote1; |
| 257 | syntaxBeginQuote2 = p.getProperty("jndi.syntax.beginquote2"); |
| 258 | syntaxEndQuote2 = p.getProperty("jndi.syntax.endquote2"); |
| 259 | if (syntaxEndQuote2 == null && syntaxBeginQuote2 != null) |
| 260 | syntaxEndQuote2 = syntaxBeginQuote2; |
| 261 | else if (syntaxBeginQuote2 == null && syntaxEndQuote2 != null) |
| 262 | syntaxBeginQuote2 = syntaxEndQuote2; |
| 263 | |
| 264 | syntaxAvaSeparator = p.getProperty("jndi.syntax.separator.ava"); |
| 265 | syntaxTypevalSeparator = |
| 266 | p.getProperty("jndi.syntax.separator.typeval"); |
| 267 | } |
| 268 | |
| 269 | NameImpl(Properties syntax) { |
| 270 | if (syntax != null) { |
| 271 | recordNamingConvention(syntax); |
| 272 | } |
| 273 | components = new Vector(); |
| 274 | } |
| 275 | |
| 276 | NameImpl(Properties syntax, String n) throws InvalidNameException { |
| 277 | this(syntax); |
| 278 | |
| 279 | boolean rToL = (syntaxDirection == RIGHT_TO_LEFT); |
| 280 | boolean compsAllEmpty = true; |
| 281 | int len = n.length(); |
| 282 | |
| 283 | for (int i = 0; i < len; ) { |
| 284 | i = extractComp(n, i, len, components); |
| 285 | |
| 286 | String comp = rToL |
| 287 | ? (String)components.firstElement() |
| 288 | : (String)components.lastElement(); |
| 289 | if (comp.length() >= 1) { |
| 290 | compsAllEmpty = false; |
| 291 | } |
| 292 | |
| 293 | if (i < len) { |
| 294 | i = skipSeparator(n, i); |
| 295 | if ((i == len) && !compsAllEmpty) { |
| 296 | // Trailing separator found. Add an empty component. |
| 297 | if (rToL) { |
| 298 | components.insertElementAt("", 0); |
| 299 | } else { |
| 300 | components.addElement(""); |
| 301 | } |
| 302 | } |
| 303 | } |
| 304 | } |
| 305 | } |
| 306 | |
| 307 | NameImpl(Properties syntax, Enumeration comps) { |
| 308 | this(syntax); |
| 309 | |
| 310 | // %% comps could shrink in the middle. |
| 311 | while (comps.hasMoreElements()) |
| 312 | components.addElement(comps.nextElement()); |
| 313 | } |
| 314 | /* |
| 315 | // Determines whether this component needs any escaping. |
| 316 | private final boolean escapingNeeded(String comp) { |
| 317 | int len = comp.length(); |
| 318 | for (int i = 0; i < len; i++) { |
| 319 | if (i == 0) { |
| 320 | if (isA(comp, 0, syntaxBeginQuote1) || |
| 321 | isA(comp, 0, syntaxBeginQuote2)) { |
| 322 | return (true); |
| 323 | } |
| 324 | } |
| 325 | if (isSeparator(comp, i)) { |
| 326 | return (true); |
| 327 | } |
| 328 | if (isA(comp, i, syntaxEscape)) { |
| 329 | i += syntaxEscape.length(); |
| 330 | if (i >= len || isMeta(comp, i)) { |
| 331 | return (true); |
| 332 | } |
| 333 | } |
| 334 | } |
| 335 | return (false); |
| 336 | } |
| 337 | */ |
| 338 | private final String stringifyComp(String comp) { |
| 339 | int len = comp.length(); |
| 340 | boolean escapeSeparator = false, escapeSeparator2 = false; |
| 341 | String beginQuote = null, endQuote = null; |
| 342 | StringBuffer strbuf = new StringBuffer(len); |
| 343 | |
| 344 | // determine whether there are any separators; if so escape |
| 345 | // or quote them |
| 346 | if (syntaxSeparator != null && |
| 347 | comp.indexOf(syntaxSeparator) >= 0) { |
| 348 | if (syntaxBeginQuote1 != null) { |
| 349 | beginQuote = syntaxBeginQuote1; |
| 350 | endQuote = syntaxEndQuote1; |
| 351 | } else if (syntaxBeginQuote2 != null) { |
| 352 | beginQuote = syntaxBeginQuote2; |
| 353 | endQuote = syntaxEndQuote2; |
| 354 | } else if (syntaxEscape != null) |
| 355 | escapeSeparator = true; |
| 356 | } |
| 357 | if (syntaxSeparator2 != null && |
| 358 | comp.indexOf(syntaxSeparator2) >= 0) { |
| 359 | if (syntaxBeginQuote1 != null) { |
| 360 | if (beginQuote == null) { |
| 361 | beginQuote = syntaxBeginQuote1; |
| 362 | endQuote = syntaxEndQuote1; |
| 363 | } |
| 364 | } else if (syntaxBeginQuote2 != null) { |
| 365 | if (beginQuote == null) { |
| 366 | beginQuote = syntaxBeginQuote2; |
| 367 | endQuote = syntaxEndQuote2; |
| 368 | } |
| 369 | } else if (syntaxEscape != null) |
| 370 | escapeSeparator2 = true; |
| 371 | } |
| 372 | |
| 373 | // if quoting component, |
| 374 | if (beginQuote != null) { |
| 375 | |
| 376 | // start string off with opening quote |
| 377 | strbuf = strbuf.append(beginQuote); |
| 378 | |
| 379 | // component is being quoted, so we only need to worry about |
| 380 | // escaping end quotes that occur in component |
| 381 | for (int i = 0; i < len; ) { |
| 382 | if (comp.startsWith(endQuote, i)) { |
| 383 | // end-quotes must be escaped when inside a quoted string |
| 384 | strbuf.append(syntaxEscape).append(endQuote); |
| 385 | i += endQuote.length(); |
| 386 | } else { |
| 387 | // no special treatment required |
| 388 | strbuf.append(comp.charAt(i++)); |
| 389 | } |
| 390 | } |
| 391 | |
| 392 | // end with closing quote |
| 393 | strbuf.append(endQuote); |
| 394 | |
| 395 | } else { |
| 396 | |
| 397 | // When component is not quoted, add escape for: |
| 398 | // 1. leading quote |
| 399 | // 2. an escape preceding any meta char |
| 400 | // 3. an escape at the end of a component |
| 401 | // 4. separator |
| 402 | |
| 403 | // go through characters in component and escape where necessary |
| 404 | boolean start = true; |
| 405 | for (int i = 0; i < len; ) { |
| 406 | // leading quote must be escaped |
| 407 | if (start && isA(comp, i, syntaxBeginQuote1)) { |
| 408 | strbuf.append(syntaxEscape).append(syntaxBeginQuote1); |
| 409 | i += syntaxBeginQuote1.length(); |
| 410 | } else if (start && isA(comp, i, syntaxBeginQuote2)) { |
| 411 | strbuf.append(syntaxEscape).append(syntaxBeginQuote2); |
| 412 | i += syntaxBeginQuote2.length(); |
| 413 | } else |
| 414 | |
| 415 | // Escape an escape preceding meta characters, or at end. |
| 416 | // Other escapes pass through. |
| 417 | if (isA(comp, i, syntaxEscape)) { |
| 418 | if (i + syntaxEscape.length() >= len) { |
| 419 | // escape an ending escape |
| 420 | strbuf.append(syntaxEscape); |
| 421 | } else if (isMeta(comp, i + syntaxEscape.length())) { |
| 422 | // escape meta strings |
| 423 | strbuf.append(syntaxEscape); |
| 424 | } |
| 425 | strbuf.append(syntaxEscape); |
| 426 | i += syntaxEscape.length(); |
| 427 | } else |
| 428 | |
| 429 | // escape unescaped separator |
| 430 | if (escapeSeparator && comp.startsWith(syntaxSeparator, i)) { |
| 431 | // escape separator |
| 432 | strbuf.append(syntaxEscape).append(syntaxSeparator); |
| 433 | i += syntaxSeparator.length(); |
| 434 | } else if (escapeSeparator2 && |
| 435 | comp.startsWith(syntaxSeparator2, i)) { |
| 436 | // escape separator2 |
| 437 | strbuf.append(syntaxEscape).append(syntaxSeparator2); |
| 438 | i += syntaxSeparator2.length(); |
| 439 | } else { |
| 440 | // no special treatment required |
| 441 | strbuf.append(comp.charAt(i++)); |
| 442 | } |
| 443 | start = false; |
| 444 | } |
| 445 | } |
| 446 | return (strbuf.toString()); |
| 447 | } |
| 448 | |
| 449 | public String toString() { |
| 450 | StringBuffer answer = new StringBuffer(); |
| 451 | String comp; |
| 452 | boolean compsAllEmpty = true; |
| 453 | int size = components.size(); |
| 454 | |
| 455 | for (int i = 0; i < size; i++) { |
| 456 | if (syntaxDirection == RIGHT_TO_LEFT) { |
| 457 | comp = |
| 458 | stringifyComp((String) components.elementAt(size - 1 - i)); |
| 459 | } else { |
| 460 | comp = stringifyComp((String) components.elementAt(i)); |
| 461 | } |
| 462 | if ((i != 0) && (syntaxSeparator != null)) |
| 463 | answer.append(syntaxSeparator); |
| 464 | if (comp.length() >= 1) |
| 465 | compsAllEmpty = false; |
| 466 | answer = answer.append(comp); |
| 467 | } |
| 468 | if (compsAllEmpty && (size >= 1) && (syntaxSeparator != null)) |
| 469 | answer = answer.append(syntaxSeparator); |
| 470 | return (answer.toString()); |
| 471 | } |
| 472 | |
| 473 | public boolean equals(Object obj) { |
| 474 | if ((obj != null) && (obj instanceof NameImpl)) { |
| 475 | NameImpl target = (NameImpl)obj; |
| 476 | if (target.size() == this.size()) { |
| 477 | Enumeration mycomps = getAll(); |
| 478 | Enumeration comps = target.getAll(); |
| 479 | while (mycomps.hasMoreElements()) { |
| 480 | // %% comps could shrink in the middle. |
| 481 | String my = (String)mycomps.nextElement(); |
| 482 | String his = (String)comps.nextElement(); |
| 483 | if (syntaxTrimBlanks) { |
| 484 | my = my.trim(); |
| 485 | his = his.trim(); |
| 486 | } |
| 487 | if (syntaxCaseInsensitive) { |
| 488 | if (!(my.equalsIgnoreCase(his))) |
| 489 | return false; |
| 490 | } else { |
| 491 | if (!(my.equals(his))) |
| 492 | return false; |
| 493 | } |
| 494 | } |
| 495 | return true; |
| 496 | } |
| 497 | } |
| 498 | return false; |
| 499 | } |
| 500 | |
| 501 | /** |
| 502 | * Compares obj to this NameImpl to determine ordering. |
| 503 | * Takes into account syntactic properties such as |
| 504 | * elimination of blanks, case-ignore, etc, if relevant. |
| 505 | * |
| 506 | * Note: using syntax of this NameImpl and ignoring |
| 507 | * that of comparison target. |
| 508 | */ |
| 509 | public int compareTo(NameImpl obj) { |
| 510 | if (this == obj) { |
| 511 | return 0; |
| 512 | } |
| 513 | |
| 514 | int len1 = size(); |
| 515 | int len2 = obj.size(); |
| 516 | int n = Math.min(len1, len2); |
| 517 | |
| 518 | int index1 = 0, index2 = 0; |
| 519 | |
| 520 | while (n-- != 0) { |
| 521 | String comp1 = get(index1++); |
| 522 | String comp2 = obj.get(index2++); |
| 523 | |
| 524 | // normalize according to syntax |
| 525 | if (syntaxTrimBlanks) { |
| 526 | comp1 = comp1.trim(); |
| 527 | comp2 = comp2.trim(); |
| 528 | } |
| 529 | if (syntaxCaseInsensitive) { |
| 530 | comp1 = comp1.toLowerCase(); |
| 531 | comp2 = comp2.toLowerCase(); |
| 532 | } |
| 533 | int local = comp1.compareTo(comp2); |
| 534 | if (local != 0) { |
| 535 | return local; |
| 536 | } |
| 537 | } |
| 538 | |
| 539 | return len1 - len2; |
| 540 | } |
| 541 | |
| 542 | public int size() { |
| 543 | return (components.size()); |
| 544 | } |
| 545 | |
| 546 | public Enumeration getAll() { |
| 547 | return components.elements(); |
| 548 | } |
| 549 | |
| 550 | public String get(int posn) { |
| 551 | return ((String) components.elementAt(posn)); |
| 552 | } |
| 553 | |
| 554 | public Enumeration getPrefix(int posn) { |
| 555 | if (posn < 0 || posn > size()) { |
| 556 | throw new ArrayIndexOutOfBoundsException(posn); |
| 557 | } |
| 558 | return new NameImplEnumerator(components, 0, posn); |
| 559 | } |
| 560 | |
| 561 | public Enumeration getSuffix(int posn) { |
| 562 | int cnt = size(); |
| 563 | if (posn < 0 || posn > cnt) { |
| 564 | throw new ArrayIndexOutOfBoundsException(posn); |
| 565 | } |
| 566 | return new NameImplEnumerator(components, posn, cnt); |
| 567 | } |
| 568 | |
| 569 | public boolean isEmpty() { |
| 570 | return (components.isEmpty()); |
| 571 | } |
| 572 | |
| 573 | public boolean startsWith(int posn, Enumeration prefix) { |
| 574 | if (posn < 0 || posn > size()) { |
| 575 | return false; |
| 576 | } |
| 577 | try { |
| 578 | Enumeration mycomps = getPrefix(posn); |
| 579 | while (mycomps.hasMoreElements()) { |
| 580 | String my = (String)mycomps.nextElement(); |
| 581 | String his = (String)prefix.nextElement(); |
| 582 | if (syntaxTrimBlanks) { |
| 583 | my = my.trim(); |
| 584 | his = his.trim(); |
| 585 | } |
| 586 | if (syntaxCaseInsensitive) { |
| 587 | if (!(my.equalsIgnoreCase(his))) |
| 588 | return false; |
| 589 | } else { |
| 590 | if (!(my.equals(his))) |
| 591 | return false; |
| 592 | } |
| 593 | } |
| 594 | } catch (NoSuchElementException e) { |
| 595 | return false; |
| 596 | } |
| 597 | return true; |
| 598 | } |
| 599 | |
| 600 | public boolean endsWith(int posn, Enumeration suffix) { |
| 601 | // posn is number of elements in suffix |
| 602 | // startIndex is the starting position in this name |
| 603 | // at which to start the comparison. It is calculated by |
| 604 | // subtracting 'posn' from size() |
| 605 | int startIndex = size() - posn; |
| 606 | if (startIndex < 0 || startIndex > size()) { |
| 607 | return false; |
| 608 | } |
| 609 | try { |
| 610 | Enumeration mycomps = getSuffix(startIndex); |
| 611 | while (mycomps.hasMoreElements()) { |
| 612 | String my = (String)mycomps.nextElement(); |
| 613 | String his = (String)suffix.nextElement(); |
| 614 | if (syntaxTrimBlanks) { |
| 615 | my = my.trim(); |
| 616 | his = his.trim(); |
| 617 | } |
| 618 | if (syntaxCaseInsensitive) { |
| 619 | if (!(my.equalsIgnoreCase(his))) |
| 620 | return false; |
| 621 | } else { |
| 622 | if (!(my.equals(his))) |
| 623 | return false; |
| 624 | } |
| 625 | } |
| 626 | } catch (NoSuchElementException e) { |
| 627 | return false; |
| 628 | } |
| 629 | return true; |
| 630 | } |
| 631 | |
| 632 | public boolean addAll(Enumeration comps) throws InvalidNameException { |
| 633 | boolean added = false; |
| 634 | while (comps.hasMoreElements()) { |
| 635 | try { |
| 636 | Object comp = comps.nextElement(); |
| 637 | if (size() > 0 && syntaxDirection == FLAT) { |
| 638 | throw new InvalidNameException( |
| 639 | "A flat name can only have a single component"); |
| 640 | } |
| 641 | components.addElement(comp); |
| 642 | added = true; |
| 643 | } catch (NoSuchElementException e) { |
| 644 | break; // "comps" has shrunk. |
| 645 | } |
| 646 | } |
| 647 | return added; |
| 648 | } |
| 649 | |
| 650 | public boolean addAll(int posn, Enumeration comps) |
| 651 | throws InvalidNameException { |
| 652 | boolean added = false; |
| 653 | for (int i = posn; comps.hasMoreElements(); i++) { |
| 654 | try { |
| 655 | Object comp = comps.nextElement(); |
| 656 | if (size() > 0 && syntaxDirection == FLAT) { |
| 657 | throw new InvalidNameException( |
| 658 | "A flat name can only have a single component"); |
| 659 | } |
| 660 | components.insertElementAt(comp, i); |
| 661 | added = true; |
| 662 | } catch (NoSuchElementException e) { |
| 663 | break; // "comps" has shrunk. |
| 664 | } |
| 665 | } |
| 666 | return added; |
| 667 | } |
| 668 | |
| 669 | public void add(String comp) throws InvalidNameException { |
| 670 | if (size() > 0 && syntaxDirection == FLAT) { |
| 671 | throw new InvalidNameException( |
| 672 | "A flat name can only have a single component"); |
| 673 | } |
| 674 | components.addElement(comp); |
| 675 | } |
| 676 | |
| 677 | public void add(int posn, String comp) throws InvalidNameException { |
| 678 | if (size() > 0 && syntaxDirection == FLAT) { |
| 679 | throw new InvalidNameException( |
| 680 | "A flat name can only zero or one component"); |
| 681 | } |
| 682 | components.insertElementAt(comp, posn); |
| 683 | } |
| 684 | |
| 685 | public Object remove(int posn) { |
| 686 | Object r = components.elementAt(posn); |
| 687 | components.removeElementAt(posn); |
| 688 | return r; |
| 689 | } |
| 690 | |
| 691 | public int hashCode() { |
| 692 | int hash = 0; |
| 693 | for (Enumeration e = getAll(); e.hasMoreElements();) { |
| 694 | String comp = (String)e.nextElement(); |
| 695 | if (syntaxTrimBlanks) { |
| 696 | comp = comp.trim(); |
| 697 | } |
| 698 | if (syntaxCaseInsensitive) { |
| 699 | comp = comp.toLowerCase(); |
| 700 | } |
| 701 | |
| 702 | hash += comp.hashCode(); |
| 703 | } |
| 704 | return hash; |
| 705 | } |
| 706 | } |
| 707 | |
| 708 | final |
| 709 | class NameImplEnumerator implements Enumeration { |
| 710 | Vector vector; |
| 711 | int count; |
| 712 | int limit; |
| 713 | |
| 714 | NameImplEnumerator(Vector v, int start, int lim) { |
| 715 | vector = v; |
| 716 | count = start; |
| 717 | limit = lim; |
| 718 | } |
| 719 | |
| 720 | public boolean hasMoreElements() { |
| 721 | return count < limit; |
| 722 | } |
| 723 | |
| 724 | public Object nextElement() { |
| 725 | if (count < limit) { |
| 726 | return vector.elementAt(count++); |
| 727 | } |
| 728 | throw new NoSuchElementException("NameImplEnumerator"); |
| 729 | } |
| 730 | } |