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GeezerVison is showing github.com — Java/clojure-type.java at main · Eggy115/Java Expand file tree/ Copy pathclojure-type.javaMore file actions 872 lines (811 loc) · 20.7 KB / Copy pathclojure-type.javaFile metadata and controls872 lines (811 loc) · 20.7 KB 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 /*** * ASM: a very small and fast Java bytecode manipulation framework * Copyright (c) 2000-2005 INRIA, France Telecom * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the copyright holders nor the names of its * contributors may be used to endorse or promote products derived from * this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF * THE POSSIBILITY OF SUCH DAMAGE. */ package clojure.asm; import java.lang.reflect.Constructor; import java.lang.reflect.Method; /** * A Java type. This class can be used to make it easier to manipulate type and * method descriptors. * * @author Eric Bruneton * @author Chris Nokleberg */ public class Type{ /** * The sort of the <tt>void</tt> type. See {@link #getSort getSort}. */ public final static int VOID = 0; /** * The sort of the <tt>boolean</tt> type. See {@link #getSort getSort}. */ public final static int BOOLEAN = 1; /** * The sort of the <tt>char</tt> type. See {@link #getSort getSort}. */ public final static int CHAR = 2; /** * The sort of the <tt>byte</tt> type. See {@link #getSort getSort}. */ public final static int BYTE = 3; /** * The sort of the <tt>short</tt> type. See {@link #getSort getSort}. */ public final static int SHORT = 4; /** * The sort of the <tt>int</tt> type. See {@link #getSort getSort}. */ public final static int INT = 5; /** * The sort of the <tt>float</tt> type. See {@link #getSort getSort}. */ public final static int FLOAT = 6; /** * The sort of the <tt>long</tt> type. See {@link #getSort getSort}. */ public final static int LONG = 7; /** * The sort of the <tt>double</tt> type. See {@link #getSort getSort}. */ public final static int DOUBLE = 8; /** * The sort of array reference types. See {@link #getSort getSort}. */ public final static int ARRAY = 9; /** * The sort of object reference type. See {@link #getSort getSort}. */ public final static int OBJECT = 10; /** * The <tt>void</tt> type. */ public final static Type VOID_TYPE = new Type(VOID); /** * The <tt>boolean</tt> type. */ public final static Type BOOLEAN_TYPE = new Type(BOOLEAN); /** * The <tt>char</tt> type. */ public final static Type CHAR_TYPE = new Type(CHAR); /** * The <tt>byte</tt> type. */ public final static Type BYTE_TYPE = new Type(BYTE); /** * The <tt>short</tt> type. */ public final static Type SHORT_TYPE = new Type(SHORT); /** * The <tt>int</tt> type. */ public final static Type INT_TYPE = new Type(INT); /** * The <tt>float</tt> type. */ public final static Type FLOAT_TYPE = new Type(FLOAT); /** * The <tt>long</tt> type. */ public final static Type LONG_TYPE = new Type(LONG); /** * The <tt>double</tt> type. */ public final static Type DOUBLE_TYPE = new Type(DOUBLE); // ------------------------------------------------------------------------ // Fields // ------------------------------------------------------------------------ /** * The sort of this Java type. */ private final int sort; /** * A buffer containing the descriptor of this Java type. This field is only * used for reference types. */ private char[] buf; /** * The offset of the descriptor of this Java type in {@link #buf buf}. This * field is only used for reference types. */ private int off; /** * The length of the descriptor of this Java type. */ private int len; // ------------------------------------------------------------------------ // Constructors // ------------------------------------------------------------------------ /** * Constructs a primitive type. * * @param sort the sort of the primitive type to be constructed. */ private Type(final int sort){ this.sort = sort; this.len = 1; } /** * Constructs a reference type. * * @param sort the sort of the reference type to be constructed. * @param buf a buffer containing the descriptor of the previous type. * @param off the offset of this descriptor in the previous buffer. * @param len the length of this descriptor. */ private Type(final int sort, final char[] buf, final int off, final int len){ this.sort = sort; this.buf = buf; this.off = off; this.len = len; } /** * Returns the Java type corresponding to the given type descriptor. * * @param typeDescriptor a type descriptor. * @return the Java type corresponding to the given type descriptor. */ public static Type getType(final String typeDescriptor){ return getType(typeDescriptor.toCharArray(), 0); } /** * Returns the Java type corresponding to the given class. * * @param c a class. * @return the Java type corresponding to the given class. */ public static Type getType(final Class c){ if(c.isPrimitive()) { if(c == Integer.TYPE) { return INT_TYPE; } else if(c == Void.TYPE) { return VOID_TYPE; } else if(c == Boolean.TYPE) { return BOOLEAN_TYPE; } else if(c == Byte.TYPE) { return BYTE_TYPE; } else if(c == Character.TYPE) { return CHAR_TYPE; } else if(c == Short.TYPE) { return SHORT_TYPE; } else if(c == Double.TYPE) { return DOUBLE_TYPE; } else if(c == Float.TYPE) { return FLOAT_TYPE; } else /* if (c == Long.TYPE) */ { return LONG_TYPE; } } else { return getType(getDescriptor(c)); } } /** * Returns the {@link Type#OBJECT} type for the given internal class name. * This is a shortcut method for <code>Type.getType("L"+name+";")</code>. * <i>Note that opposed to {@link Type#getType(String)}, this method takes * internal class names and not class descriptor.</i> * * @param name an internal class name. * @return the the {@link Type#OBJECT} type for the given class name. */ public static Type getObjectType(String name){ int l = name.length(); char[] buf = new char[l + 2]; buf[0] = 'L'; buf[l + 1] = ';'; name.getChars(0, l, buf, 1); return new Type(OBJECT, buf, 0, l + 2); } /** * Returns the Java types corresponding to the argument types of the given * method descriptor. * * @param methodDescriptor a method descriptor. * @return the Java types corresponding to the argument types of the given * method descriptor. */ public static Type[] getArgumentTypes(final String methodDescriptor){ char[] buf = methodDescriptor.toCharArray(); int off = 1; int size = 0; while(true) { char car = buf[off++]; if(car == ')') { break; } else if(car == 'L') { while(buf[off++] != ';') { } ++size; } else if(car != '[') { ++size; } } Type[] args = new Type[size]; off = 1; size = 0; while(buf[off] != ')') { args[size] = getType(buf, off); off += args[size].len; size += 1; } return args; } /** * Returns the Java types corresponding to the argument types of the given * method. * * @param method a method. * @return the Java types corresponding to the argument types of the given * method. */ public static Type[] getArgumentTypes(final Method method){ Class[] classes = method.getParameterTypes(); Type[] types = new Type[classes.length]; for(int i = classes.length - 1; i >= 0; --i) { types[i] = getType(classes[i]); } return types; } /** * Returns the Java type corresponding to the return type of the given * method descriptor. * * @param methodDescriptor a method descriptor. * @return the Java type corresponding to the return type of the given * method descriptor. */ public static Type getReturnType(final String methodDescriptor){ char[] buf = methodDescriptor.toCharArray(); return getType(buf, methodDescriptor.indexOf(')') + 1); } /** * Returns the Java type corresponding to the return type of the given * method. * * @param method a method. * @return the Java type corresponding to the return type of the given * method. */ public static Type getReturnType(final Method method){ return getType(method.getReturnType()); } /** * Returns the Java type corresponding to the given type descriptor. * * @param buf a buffer containing a type descriptor. * @param off the offset of this descriptor in the previous buffer. * @return the Java type corresponding to the given type descriptor. */ private static Type getType(final char[] buf, final int off){ int len; switch(buf[off]) { case'V': return VOID_TYPE; case'Z': return BOOLEAN_TYPE; case'C': return CHAR_TYPE; case'B': return BYTE_TYPE; case'S': return SHORT_TYPE; case'I': return INT_TYPE; case'F': return FLOAT_TYPE; case'J': return LONG_TYPE; case'D': return DOUBLE_TYPE; case'[': len = 1; while(buf[off + len] == '[') { ++len; } if(buf[off + len] == 'L') { ++len; while(buf[off + len] != ';') { ++len; } } return new Type(ARRAY, buf, off, len + 1); // case 'L': default: len = 1; while(buf[off + len] != ';') { ++len; } return new Type(OBJECT, buf, off, len + 1); } } // ------------------------------------------------------------------------ // Accessors // ------------------------------------------------------------------------ /** * Returns the sort of this Java type. * * @return {@link #VOID VOID}, {@link #BOOLEAN BOOLEAN}, * {@link #CHAR CHAR}, {@link #BYTE BYTE}, {@link #SHORT SHORT}, * {@link #INT INT}, {@link #FLOAT FLOAT}, {@link #LONG LONG}, * {@link #DOUBLE DOUBLE}, {@link #ARRAY ARRAY} or * {@link #OBJECT OBJECT}. */ public int getSort(){ return sort; } /** * Returns the number of dimensions of this array type. This method should * only be used for an array type. * * @return the number of dimensions of this array type. */ public int getDimensions(){ int i = 1; while(buf[off + i] == '[') { ++i; } return i; } /** * Returns the type of the elements of this array type. This method should * only be used for an array type. * * @return Returns the type of the elements of this array type. */ public Type getElementType(){ return getType(buf, off + getDimensions()); } /** * Returns the name of the class corresponding to this type. * * @return the fully qualified name of the class corresponding to this type. */ public String getClassName(){ switch(sort) { case VOID: return "void"; case BOOLEAN: return "boolean"; case CHAR: return "char"; case BYTE: return "byte"; case SHORT: return "short"; case INT: return "int"; case FLOAT: return "float"; case LONG: return "long"; case DOUBLE: return "double"; case ARRAY: StringBuffer b = new StringBuffer(getElementType().getClassName()); for(int i = getDimensions(); i > 0; --i) { b.append("[]"); } return b.toString(); // case OBJECT: default: return new String(buf, off + 1, len - 2).replace('/', '.'); } } /** * Returns the internal name of the class corresponding to this object type. * The internal name of a class is its fully qualified name, where '.' are * replaced by '/'. This method should only be used for an object type. * * @return the internal name of the class corresponding to this object type. */ public String getInternalName(){ return new String(buf, off + 1, len - 2); } // ------------------------------------------------------------------------ // Conversion to type descriptors // ------------------------------------------------------------------------ /** * Returns the descriptor corresponding to this Java type. * * @return the descriptor corresponding to this Java type. */ public String getDescriptor(){ StringBuffer buf = new StringBuffer(); getDescriptor(buf); return buf.toString(); } /** * Returns the descriptor corresponding to the given argument and return * types. * * @param returnType the return type of the method. * @param argumentTypes the argument types of the method. * @return the descriptor corresponding to the given argument and return * types. */ public static String getMethodDescriptor( final Type returnType, final Type[] argumentTypes){ StringBuffer buf = new StringBuffer(); buf.append('('); for(int i = 0; i < argumentTypes.length; ++i) { argumentTypes[i].getDescriptor(buf); } buf.append(')'); returnType.getDescriptor(buf); return buf.toString(); } /** * Appends the descriptor corresponding to this Java type to the given * string buffer. * * @param buf the string buffer to which the descriptor must be appended. */ private void getDescriptor(final StringBuffer buf){ switch(sort) { case VOID: buf.append('V'); return; case BOOLEAN: buf.append('Z'); return; case CHAR: buf.append('C'); return; case BYTE: buf.append('B'); return; case SHORT: buf.append('S'); return; case INT: buf.append('I'); return; case FLOAT: buf.append('F'); return; case LONG: buf.append('J'); return; case DOUBLE: buf.append('D'); return; // case ARRAY: // case OBJECT: default: buf.append(this.buf, off, len); } } // ------------------------------------------------------------------------ // Direct conversion from classes to type descriptors, // without intermediate Type objects // ------------------------------------------------------------------------ /** * Returns the internal name of the given class. The internal name of a * class is its fully qualified name, where '.' are replaced by '/'. * * @param c an object class. * @return the internal name of the given class. */ public static String getInternalName(final Class c){ return c.getName().replace('.', '/'); } /** * Returns the descriptor corresponding to the given Java type. * * @param c an object class, a primitive class or an array class. * @return the descriptor corresponding to the given class. */ public static String getDescriptor(final Class c){ StringBuffer buf = new StringBuffer(); getDescriptor(buf, c); return buf.toString(); } /** * Returns the descriptor corresponding to the given constructor. * * @param c a {@link Constructor Constructor} object. * @return the descriptor of the given constructor. */ public static String getConstructorDescriptor(final Constructor c){ Class[] parameters = c.getParameterTypes(); StringBuffer buf = new StringBuffer(); buf.append('('); for(int i = 0; i < parameters.length; ++i) { getDescriptor(buf, parameters[i]); } return buf.append(")V").toString(); } /** * Returns the descriptor corresponding to the given method. * * @param m a {@link Method Method} object. * @return the descriptor of the given method. */ public static String getMethodDescriptor(final Method m){ Class[] parameters = m.getParameterTypes(); StringBuffer buf = new StringBuffer(); buf.append('('); for(int i = 0; i < parameters.length; ++i) { getDescriptor(buf, parameters[i]); } buf.append(')'); getDescriptor(buf, m.getReturnType()); return buf.toString(); } /** * Appends the descriptor of the given class to the given string buffer. * * @param buf the string buffer to which the descriptor must be appended. * @param c the class whose descriptor must be computed. */ private static void getDescriptor(final StringBuffer buf, final Class c){ Class d = c; while(true) { if(d.isPrimitive()) { char car; if(d == Integer.TYPE) { car = 'I'; } else if(d == Void.TYPE) { car = 'V'; } else if(d == Boolean.TYPE) { car = 'Z'; } else if(d == Byte.TYPE) { car = 'B'; } else if(d == Character.TYPE) { car = 'C'; } else if(d == Short.TYPE) { car = 'S'; } else if(d == Double.TYPE) { car = 'D'; } else if(d == Float.TYPE) { car = 'F'; } else /* if (d == Long.TYPE) */ { car = 'J'; } buf.append(car); return; } else if(d.isArray()) { buf.append('['); d = d.getComponentType(); } else { buf.append('L'); String name = d.getName(); int len = name.length(); for(int i = 0; i < len; ++i) { char car = name.charAt(i); buf.append(car == '.' ? '/' : car); } buf.append(';'); return; } } } // ------------------------------------------------------------------------ // Corresponding size and opcodes // ------------------------------------------------------------------------ /** * Returns the size of values of this type. * * @return the size of values of this type, i.e., 2 for <tt>long</tt> and * <tt>double</tt>, and 1 otherwise. */ public int getSize(){ return sort == LONG || sort == DOUBLE ? 2 : 1; } /** * Returns a JVM instruction opcode adapted to this Java type. * * @param opcode a JVM instruction opcode. This opcode must be one of ILOAD, * ISTORE, IALOAD, IASTORE, IADD, ISUB, IMUL, IDIV, IREM, INEG, ISHL, * ISHR, IUSHR, IAND, IOR, IXOR and IRETURN. * @return an opcode that is similar to the given opcode, but adapted to * this Java type. For example, if this type is <tt>float</tt> and * <tt>opcode</tt> is IRETURN, this method returns FRETURN. */ public int getOpcode(final int opcode){ if(opcode == Opcodes.IALOAD || opcode == Opcodes.IASTORE) { switch(sort) { case BOOLEAN: case BYTE: return opcode + 5; case CHAR: return opcode + 6; case SHORT: return opcode + 7; case INT: return opcode; case FLOAT: return opcode + 2; case LONG: return opcode + 1; case DOUBLE: return opcode + 3; // case ARRAY: // case OBJECT: default: return opcode + 4; } } else { switch(sort) { case VOID: return opcode + 5; case BOOLEAN: case CHAR: case BYTE: case SHORT: case INT: return opcode; case FLOAT: return opcode + 2; case LONG: return opcode + 1; case DOUBLE: return opcode + 3; // case ARRAY: // case OBJECT: default: return opcode + 4; } } } // ------------------------------------------------------------------------ // Equals, hashCode and toString // ------------------------------------------------------------------------ /** * Tests if the given object is equal to this type. * * @param o the object to be compared to this type. * @return <tt>true</tt> if the given object is equal to this type. */ public boolean equals(final Object o){ if(this == o) { return true; } if(!(o instanceof Type)) { return false; } Type t = (Type) o; if(sort != t.sort) { return false; } if(sort == Type.OBJECT || sort == Type.ARRAY) { if(len != t.len) { return false; } for(int i = off, j = t.off, end = i + len; i < end; i++, j++) { if(buf[i] != t.buf[j]) { return false; } } } return true; } /** * Returns a hash code value for this type. * * @return a hash code value for this type. */ public int hashCode(){ int hc = 13 * sort; if(sort == Type.OBJECT || sort == Type.ARRAY) { for(int i = off, end = i + len; i < end; i++) { hc = 17 * (hc + buf[i]); } } return hc; } /** * Returns a string representation of this type. * * @return the descriptor of this type. */ public String toString(){ return getDescriptor(); } } |
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