| 1 | /* |
| 2 | * Written by Dawid Kurzyniec, based on code written by Doug Lea with assistance |
| 3 | * from members of JCP JSR-166 Expert Group. Released to the public domain, |
| 4 | * as explained at http://creativecommons.org/licenses/publicdomain. |
| 5 | */ |
| 6 | |
| 7 | /* |
| 8 | * Copied from backport-util-concurrent so that weaved code can also be used |
| 9 | * with 1.2 and 1.3 JVMs. Only 1.5+ methods are copied. |
| 10 | */ |
| 11 | package net.sourceforge.retroweaver.runtime.java.util; |
| 12 | |
| 13 | import java.lang.reflect.Array; |
| 14 | import java.util.ArrayList; |
| 15 | import java.util.List; |
| 16 | |
| 17 | public class Arrays_ { |
| 18 | |
| 19 | private Arrays_() {} |
| 20 | |
| 21 | // Cloning |
| 22 | |
| 23 | /** |
| 24 | * @since 1.6 |
| 25 | */ |
| 26 | public static Object[] copyOf(Object[] original, int newLength) { |
| 27 | return copyOf(original, newLength, original.getClass()); |
| 28 | } |
| 29 | |
| 30 | /** |
| 31 | * @since 1.6 |
| 32 | */ |
| 33 | public static Object[] copyOf(Object[] original, int newLength, Class newType) { |
| 34 | Object[] arr = (newType == Object[].class) ? new Object[newLength] : |
| 35 | (Object[])Array.newInstance(newType.getComponentType(), newLength); |
| 36 | int len = (original.length < newLength ? original.length : newLength); |
| 37 | System.arraycopy(original, 0, arr, 0, len); |
| 38 | return arr; |
| 39 | } |
| 40 | |
| 41 | /** |
| 42 | * @since 1.6 |
| 43 | */ |
| 44 | public static byte[] copyOf(byte[] original, int newLength) { |
| 45 | byte[] arr = new byte[newLength]; |
| 46 | int len = (original.length < newLength ? original.length : newLength); |
| 47 | System.arraycopy(original, 0, arr, 0, len); |
| 48 | return arr; |
| 49 | } |
| 50 | |
| 51 | /** |
| 52 | * @since 1.6 |
| 53 | */ |
| 54 | public static short[] copyOf(short[] original, int newLength) { |
| 55 | short[] arr = new short[newLength]; |
| 56 | int len = (original.length < newLength ? original.length : newLength); |
| 57 | System.arraycopy(original, 0, arr, 0, len); |
| 58 | return arr; |
| 59 | } |
| 60 | |
| 61 | /** |
| 62 | * @since 1.6 |
| 63 | */ |
| 64 | public static int[] copyOf(int[] original, int newLength) { |
| 65 | int[] arr = new int[newLength]; |
| 66 | int len = (original.length < newLength ? original.length : newLength); |
| 67 | System.arraycopy(original, 0, arr, 0, len); |
| 68 | return arr; |
| 69 | } |
| 70 | |
| 71 | /** |
| 72 | * @since 1.6 |
| 73 | */ |
| 74 | public static long[] copyOf(long[] original, int newLength) { |
| 75 | long[] arr = new long[newLength]; |
| 76 | int len = (original.length < newLength ? original.length : newLength); |
| 77 | System.arraycopy(original, 0, arr, 0, len); |
| 78 | return arr; |
| 79 | } |
| 80 | |
| 81 | /** |
| 82 | * @since 1.6 |
| 83 | */ |
| 84 | public static char[] copyOf(char[] original, int newLength) { |
| 85 | char[] arr = new char[newLength]; |
| 86 | int len = (original.length < newLength ? original.length : newLength); |
| 87 | System.arraycopy(original, 0, arr, 0, len); |
| 88 | return arr; |
| 89 | } |
| 90 | |
| 91 | /** |
| 92 | * @since 1.6 |
| 93 | */ |
| 94 | public static float[] copyOf(float[] original, int newLength) { |
| 95 | float[] arr = new float[newLength]; |
| 96 | int len = (original.length < newLength ? original.length : newLength); |
| 97 | System.arraycopy(original, 0, arr, 0, len); |
| 98 | return arr; |
| 99 | } |
| 100 | |
| 101 | /** |
| 102 | * @since 1.6 |
| 103 | */ |
| 104 | public static double[] copyOf(double[] original, int newLength) { |
| 105 | double[] arr = new double[newLength]; |
| 106 | int len = (original.length < newLength ? original.length : newLength); |
| 107 | System.arraycopy(original, 0, arr, 0, len); |
| 108 | return arr; |
| 109 | } |
| 110 | |
| 111 | /** |
| 112 | * @since 1.6 |
| 113 | */ |
| 114 | public static boolean[] copyOf(boolean[] original, int newLength) { |
| 115 | boolean[] arr = new boolean[newLength]; |
| 116 | int len = (original.length < newLength ? original.length : newLength); |
| 117 | System.arraycopy(original, 0, arr, 0, len); |
| 118 | return arr; |
| 119 | } |
| 120 | |
| 121 | /** |
| 122 | * @since 1.6 |
| 123 | */ |
| 124 | public static Object[] copyOfRange(Object[] original, int from, int to) { |
| 125 | return copyOfRange(original, from, to, original.getClass()); |
| 126 | } |
| 127 | |
| 128 | /** |
| 129 | * @since 1.6 |
| 130 | */ |
| 131 | public static Object[] copyOfRange(Object[] original, int from, int to, Class newType) { |
| 132 | int newLength = to - from; |
| 133 | if (newLength < 0) throw new IllegalArgumentException(from + " > " + to); |
| 134 | Object[] arr = (newType == Object[].class) ? new Object[newLength] : |
| 135 | (Object[])Array.newInstance(newType.getComponentType(), newLength); |
| 136 | int ceil = original.length-from; |
| 137 | int len = (ceil < newLength) ? ceil : newLength; |
| 138 | System.arraycopy(original, from, arr, 0, len); |
| 139 | return arr; |
| 140 | } |
| 141 | |
| 142 | /** |
| 143 | * @since 1.6 |
| 144 | */ |
| 145 | public static byte[] copyOfRange(byte[] original, int from, int to) { |
| 146 | int newLength = to - from; |
| 147 | if (newLength < 0) throw new IllegalArgumentException(from + " > " + to); |
| 148 | byte[] arr = new byte[newLength]; |
| 149 | int ceil = original.length-from; |
| 150 | int len = (ceil < newLength) ? ceil : newLength; |
| 151 | System.arraycopy(original, from, arr, 0, len); |
| 152 | return arr; |
| 153 | } |
| 154 | |
| 155 | /** |
| 156 | * @since 1.6 |
| 157 | */ |
| 158 | public static short[] copyOfRange(short[] original, int from, int to) { |
| 159 | int newLength = to - from; |
| 160 | if (newLength < 0) throw new IllegalArgumentException(from + " > " + to); |
| 161 | short[] arr = new short[newLength]; |
| 162 | int ceil = original.length-from; |
| 163 | int len = (ceil < newLength) ? ceil : newLength; |
| 164 | System.arraycopy(original, from, arr, 0, len); |
| 165 | return arr; |
| 166 | } |
| 167 | |
| 168 | /** |
| 169 | * @since 1.6 |
| 170 | */ |
| 171 | public static int[] copyOfRange(int[] original, int from, int to) { |
| 172 | int newLength = to - from; |
| 173 | if (newLength < 0) throw new IllegalArgumentException(from + " > " + to); |
| 174 | int[] arr = new int[newLength]; |
| 175 | int ceil = original.length-from; |
| 176 | int len = (ceil < newLength) ? ceil : newLength; |
| 177 | System.arraycopy(original, from, arr, 0, len); |
| 178 | return arr; |
| 179 | } |
| 180 | |
| 181 | /** |
| 182 | * @since 1.6 |
| 183 | */ |
| 184 | public static long[] copyOfRange(long[] original, int from, int to) { |
| 185 | int newLength = to - from; |
| 186 | if (newLength < 0) throw new IllegalArgumentException(from + " > " + to); |
| 187 | long[] arr = new long[newLength]; |
| 188 | int ceil = original.length-from; |
| 189 | int len = (ceil < newLength) ? ceil : newLength; |
| 190 | System.arraycopy(original, from, arr, 0, len); |
| 191 | return arr; |
| 192 | } |
| 193 | |
| 194 | /** |
| 195 | * @since 1.6 |
| 196 | */ |
| 197 | public static char[] copyOfRange(char[] original, int from, int to) { |
| 198 | int newLength = to - from; |
| 199 | if (newLength < 0) throw new IllegalArgumentException(from + " > " + to); |
| 200 | char[] arr = new char[newLength]; |
| 201 | int ceil = original.length-from; |
| 202 | int len = (ceil < newLength) ? ceil : newLength; |
| 203 | System.arraycopy(original, from, arr, 0, len); |
| 204 | return arr; |
| 205 | } |
| 206 | |
| 207 | /** |
| 208 | * @since 1.6 |
| 209 | */ |
| 210 | public static float[] copyOfRange(float[] original, int from, int to) { |
| 211 | int newLength = to - from; |
| 212 | if (newLength < 0) throw new IllegalArgumentException(from + " > " + to); |
| 213 | float[] arr = new float[newLength]; |
| 214 | int ceil = original.length-from; |
| 215 | int len = (ceil < newLength) ? ceil : newLength; |
| 216 | System.arraycopy(original, from, arr, 0, len); |
| 217 | return arr; |
| 218 | } |
| 219 | |
| 220 | /** |
| 221 | * @since 1.6 |
| 222 | */ |
| 223 | public static double[] copyOfRange(double[] original, int from, int to) { |
| 224 | int newLength = to - from; |
| 225 | if (newLength < 0) throw new IllegalArgumentException(from + " > " + to); |
| 226 | double[] arr = new double[newLength]; |
| 227 | int ceil = original.length-from; |
| 228 | int len = (ceil < newLength) ? ceil : newLength; |
| 229 | System.arraycopy(original, from, arr, 0, len); |
| 230 | return arr; |
| 231 | } |
| 232 | |
| 233 | /** |
| 234 | * @since 1.6 |
| 235 | */ |
| 236 | public static boolean[] copyOfRange(boolean[] original, int from, int to) { |
| 237 | int newLength = to - from; |
| 238 | if (newLength < 0) throw new IllegalArgumentException(from + " > " + to); |
| 239 | boolean[] arr = new boolean[newLength]; |
| 240 | int ceil = original.length-from; |
| 241 | int len = (ceil < newLength) ? ceil : newLength; |
| 242 | System.arraycopy(original, from, arr, 0, len); |
| 243 | return arr; |
| 244 | } |
| 245 | |
| 246 | /** |
| 247 | * @since 1.5 |
| 248 | */ |
| 249 | public static int hashCode(long a[]) { |
| 250 | if (a == null) return 0; |
| 251 | int hash = 1; |
| 252 | for (int i=0; i<a.length; i++) { |
| 253 | long e = a[i]; |
| 254 | hash = 31*hash + (int)(e ^ (e >>> 32)); |
| 255 | } |
| 256 | return hash; |
| 257 | } |
| 258 | |
| 259 | /** |
| 260 | * @since 1.5 |
| 261 | */ |
| 262 | public static int hashCode(int a[]) { |
| 263 | if (a == null) return 0; |
| 264 | int hash = 1; |
| 265 | for (int i=0; i<a.length; i++) { |
| 266 | hash = 31*hash + a[i]; |
| 267 | } |
| 268 | return hash; |
| 269 | } |
| 270 | |
| 271 | /** |
| 272 | * @since 1.5 |
| 273 | */ |
| 274 | public static int hashCode(short a[]) { |
| 275 | if (a == null) return 0; |
| 276 | int hash = 1; |
| 277 | for (int i=0; i<a.length; i++) { |
| 278 | hash = 31*hash + a[i]; |
| 279 | } |
| 280 | return hash; |
| 281 | } |
| 282 | |
| 283 | /** |
| 284 | * @since 1.5 |
| 285 | */ |
| 286 | public static int hashCode(char a[]) { |
| 287 | if (a == null) return 0; |
| 288 | int hash = 1; |
| 289 | for (int i=0; i<a.length; i++) { |
| 290 | hash = 31*hash + a[i]; |
| 291 | } |
| 292 | return hash; |
| 293 | } |
| 294 | |
| 295 | /** |
| 296 | * @since 1.5 |
| 297 | */ |
| 298 | public static int hashCode(byte a[]) { |
| 299 | if (a == null) return 0; |
| 300 | int hash = 1; |
| 301 | for (int i=0; i<a.length; i++) { |
| 302 | hash = 31*hash + a[i]; |
| 303 | } |
| 304 | return hash; |
| 305 | } |
| 306 | |
| 307 | /** |
| 308 | * @since 1.5 |
| 309 | */ |
| 310 | public static int hashCode(boolean a[]) { |
| 311 | if (a == null) return 0; |
| 312 | int hash = 1; |
| 313 | for (int i=0; i<a.length; i++) { |
| 314 | hash = 31*hash + (a[i] ? 1231 : 1237); |
| 315 | } |
| 316 | return hash; |
| 317 | } |
| 318 | |
| 319 | /** |
| 320 | * @since 1.5 |
| 321 | */ |
| 322 | public static int hashCode(float a[]) { |
| 323 | if (a == null) return 0; |
| 324 | int hash = 1; |
| 325 | for (int i=0; i<a.length; i++) { |
| 326 | hash = 31*hash + Float.floatToIntBits(a[i]); |
| 327 | } |
| 328 | return hash; |
| 329 | } |
| 330 | |
| 331 | /** |
| 332 | * @since 1.5 |
| 333 | */ |
| 334 | public static int hashCode(double a[]) { |
| 335 | if (a == null) return 0; |
| 336 | int hash = 1; |
| 337 | for (int i=0; i<a.length; i++) { |
| 338 | long e = Double.doubleToLongBits(a[i]); |
| 339 | hash = 31*hash + (int)(e ^ (e >>> 32)); |
| 340 | } |
| 341 | return hash; |
| 342 | } |
| 343 | |
| 344 | /** |
| 345 | * @since 1.5 |
| 346 | */ |
| 347 | public static int hashCode(Object a[]) { |
| 348 | if (a == null) return 0; |
| 349 | int hash = 1; |
| 350 | for (int i=0; i<a.length; i++) { |
| 351 | Object e = a[i]; |
| 352 | hash = 31*hash + (e == null ? 0 : e.hashCode()); |
| 353 | } |
| 354 | return hash; |
| 355 | } |
| 356 | |
| 357 | /** |
| 358 | * @since 1.5 |
| 359 | */ |
| 360 | public static int deepHashCode(Object a[]) { |
| 361 | if (a == null) return 0; |
| 362 | int hash = 1; |
| 363 | for (int i=0; i<a.length; i++) { |
| 364 | Object e = a[i]; |
| 365 | hash = 31*hash + |
| 366 | (e instanceof Object[] ? deepHashCode((Object[])e) : |
| 367 | (e instanceof byte[] ? hashCode((byte[])e) : |
| 368 | (e instanceof short[] ? hashCode((short[])e) : |
| 369 | (e instanceof int[] ? hashCode((int[])e) : |
| 370 | (e instanceof long[] ? hashCode((long[])e) : |
| 371 | (e instanceof char[] ? hashCode((char[])e) : |
| 372 | (e instanceof boolean[] ? hashCode((boolean[])e) : |
| 373 | (e instanceof float[] ? hashCode((float[])e) : |
| 374 | (e instanceof double[] ? hashCode((double[])e) : |
| 375 | (e != null ? e.hashCode() : 0)))))))))); |
| 376 | } |
| 377 | return hash; |
| 378 | |
| 379 | } |
| 380 | |
| 381 | /** |
| 382 | * @since 1.5 |
| 383 | */ |
| 384 | public static boolean deepEquals(Object[] a1, Object[] a2) { |
| 385 | if (a1 == a2) return true; |
| 386 | if (a1 == null || a2==null) return false; |
| 387 | int len = a1.length; |
| 388 | if (len != a2.length) return false; |
| 389 | for (int i = 0; i < len; i++) { |
| 390 | Object e1 = a1[i]; |
| 391 | Object e2 = a2[i]; |
| 392 | if (e1 == e2) continue; |
| 393 | if (e1 == null) return false; |
| 394 | boolean eq = |
| 395 | (e1.getClass() != e2.getClass() || e1.getClass().isArray()) ? |
| 396 | e1.equals(e2) : |
| 397 | (e1 instanceof Object[] && e2 instanceof Object[]) ? |
| 398 | deepEquals((Object[])e1, (Object[])e2) : |
| 399 | (e1 instanceof byte[] && e2 instanceof byte[]) ? |
| 400 | java.util.Arrays.equals((byte[])e1, (byte[])e2) : |
| 401 | (e1 instanceof short[] && e2 instanceof short[]) ? |
| 402 | java.util.Arrays.equals((short[])e1, (short[])e2) : |
| 403 | (e1 instanceof int[] && e2 instanceof int[]) ? |
| 404 | java.util.Arrays. equals((int[])e1, (int[])e2) : |
| 405 | (e1 instanceof long[] && e2 instanceof long[]) ? |
| 406 | java.util.Arrays.equals((long[])e1, (long[])e2) : |
| 407 | (e1 instanceof char[] && e2 instanceof char[]) ? |
| 408 | java.util.Arrays.equals((char[])e1, (char[])e2) : |
| 409 | (e1 instanceof boolean[] && e2 instanceof boolean[]) ? |
| 410 | java.util.Arrays.equals((boolean[])e1, (boolean[])e2) : |
| 411 | (e1 instanceof float[] && e2 instanceof float[]) ? |
| 412 | java.util.Arrays.equals((float[])e1, (float[])e2) : |
| 413 | (e1 instanceof double[] && e2 instanceof double[]) ? |
| 414 | java.util.Arrays.equals((double[])e1, (double[])e2) : |
| 415 | e1.equals(e2); |
| 416 | |
| 417 | if (!eq) return false; |
| 418 | } |
| 419 | return true; |
| 420 | } |
| 421 | |
| 422 | /** |
| 423 | * @since 1.5 |
| 424 | */ |
| 425 | public static String toString(long[] a) { |
| 426 | if (a == null) return "null"; |
| 427 | if (a.length == 0) return "[]"; |
| 428 | StringBuffer buf = new StringBuffer(); |
| 429 | buf.append('[').append(a[0]); |
| 430 | for (int i=1; i<a.length; i++) buf.append(", ").append(a[i]); |
| 431 | buf.append(']'); |
| 432 | return buf.toString(); |
| 433 | } |
| 434 | |
| 435 | /** |
| 436 | * @since 1.5 |
| 437 | */ |
| 438 | public static String toString(int[] a) { |
| 439 | if (a == null) return "null"; |
| 440 | if (a.length == 0) return "[]"; |
| 441 | StringBuffer buf = new StringBuffer(); |
| 442 | buf.append('[').append(a[0]); |
| 443 | for (int i=1; i<a.length; i++) buf.append(", ").append(a[i]); |
| 444 | buf.append(']'); |
| 445 | return buf.toString(); |
| 446 | } |
| 447 | |
| 448 | /** |
| 449 | * @since 1.5 |
| 450 | */ |
| 451 | public static String toString(short[] a) { |
| 452 | if (a == null) return "null"; |
| 453 | if (a.length == 0) return "[]"; |
| 454 | StringBuffer buf = new StringBuffer(); |
| 455 | buf.append('[').append(a[0]); |
| 456 | for (int i=1; i<a.length; i++) buf.append(", ").append(a[i]); |
| 457 | buf.append(']'); |
| 458 | return buf.toString(); |
| 459 | } |
| 460 | |
| 461 | /** |
| 462 | * @since 1.5 |
| 463 | */ |
| 464 | public static String toString(char[] a) { |
| 465 | if (a == null) return "null"; |
| 466 | if (a.length == 0) return "[]"; |
| 467 | StringBuffer buf = new StringBuffer(); |
| 468 | buf.append('[').append(a[0]); |
| 469 | for (int i=1; i<a.length; i++) buf.append(", ").append(a[i]); |
| 470 | buf.append(']'); |
| 471 | return buf.toString(); |
| 472 | } |
| 473 | |
| 474 | /** |
| 475 | * @since 1.5 |
| 476 | */ |
| 477 | public static String toString(byte[] a) { |
| 478 | if (a == null) return "null"; |
| 479 | if (a.length == 0) return "[]"; |
| 480 | StringBuffer buf = new StringBuffer(); |
| 481 | buf.append('[').append(a[0]); |
| 482 | for (int i=1; i<a.length; i++) buf.append(", ").append(a[i]); |
| 483 | buf.append(']'); |
| 484 | return buf.toString(); |
| 485 | } |
| 486 | |
| 487 | /** |
| 488 | * @since 1.5 |
| 489 | */ |
| 490 | public static String toString(boolean[] a) { |
| 491 | if (a == null) return "null"; |
| 492 | if (a.length == 0) return "[]"; |
| 493 | StringBuffer buf = new StringBuffer(); |
| 494 | buf.append('[').append(a[0]); |
| 495 | for (int i=1; i<a.length; i++) buf.append(", ").append(a[i]); |
| 496 | buf.append(']'); |
| 497 | return buf.toString(); |
| 498 | } |
| 499 | |
| 500 | /** |
| 501 | * @since 1.5 |
| 502 | */ |
| 503 | public static String toString(float[] a) { |
| 504 | if (a == null) return "null"; |
| 505 | if (a.length == 0) return "[]"; |
| 506 | StringBuffer buf = new StringBuffer(); |
| 507 | buf.append('[').append(a[0]); |
| 508 | for (int i=1; i<a.length; i++) buf.append(", ").append(a[i]); |
| 509 | buf.append(']'); |
| 510 | return buf.toString(); |
| 511 | } |
| 512 | |
| 513 | /** |
| 514 | * @since 1.5 |
| 515 | */ |
| 516 | public static String toString(double[] a) { |
| 517 | if (a == null) return "null"; |
| 518 | if (a.length == 0) return "[]"; |
| 519 | StringBuffer buf = new StringBuffer(); |
| 520 | buf.append('[').append(a[0]); |
| 521 | for (int i=1; i<a.length; i++) buf.append(", ").append(a[i]); |
| 522 | buf.append(']'); |
| 523 | return buf.toString(); |
| 524 | } |
| 525 | |
| 526 | /** |
| 527 | * @since 1.5 |
| 528 | */ |
| 529 | public static String toString(Object[] a) { |
| 530 | if (a == null) return "null"; |
| 531 | if (a.length == 0) return "[]"; |
| 532 | StringBuffer buf = new StringBuffer(); |
| 533 | buf.append('[').append(a[0]); |
| 534 | for (int i=1; i<a.length; i++) buf.append(", ").append(a[i]); |
| 535 | buf.append(']'); |
| 536 | return buf.toString(); |
| 537 | } |
| 538 | |
| 539 | /** |
| 540 | * @since 1.5 |
| 541 | */ |
| 542 | public static String deepToString(Object[] a) { |
| 543 | if (a == null) return "null"; |
| 544 | StringBuffer buf = new StringBuffer(); |
| 545 | deepToString(a, buf, new ArrayList()); |
| 546 | return buf.toString(); |
| 547 | } |
| 548 | |
| 549 | private static void deepToString(Object[] a, StringBuffer buf, List seen) { |
| 550 | seen.add(a); |
| 551 | buf.append('['); |
| 552 | for (int i = 0; i < a.length; i++) { |
| 553 | if (i>0) buf.append(", "); |
| 554 | Object e = a[i]; |
| 555 | if (e == null) { |
| 556 | buf.append("null"); |
| 557 | } |
| 558 | else if (!e.getClass().isArray()) { |
| 559 | buf.append(e.toString()); |
| 560 | } |
| 561 | else if (e instanceof Object[]) { |
| 562 | if (seen.contains(e)) buf.append("[...]"); |
| 563 | else deepToString((Object[])e, buf, seen); |
| 564 | } |
| 565 | else { |
| 566 | // primitive arr |
| 567 | buf.append( |
| 568 | (e instanceof byte[]) ? toString( (byte[]) e) : |
| 569 | (e instanceof short[]) ? toString( (short[]) e) : |
| 570 | (e instanceof int[]) ? toString( (int[]) e) : |
| 571 | (e instanceof long[]) ? toString( (long[]) e) : |
| 572 | (e instanceof char[]) ? toString( (char[]) e) : |
| 573 | (e instanceof boolean[]) ? toString( (boolean[]) e) : |
| 574 | (e instanceof float[]) ? toString( (float[]) e) : |
| 575 | (e instanceof double[]) ? toString( (double[]) e) : ""); |
| 576 | } |
| 577 | } |
| 578 | buf.append(']'); |
| 579 | seen.remove(seen.size()-1); |
| 580 | } |
| 581 | } |