ClassReader.java revision 3502:d213ecfb98b2
1/* 2 * Copyright (c) 1999, 2016, 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 26package com.sun.tools.javac.jvm; 27 28import java.io.*; 29import java.net.URI; 30import java.net.URISyntaxException; 31import java.nio.CharBuffer; 32import java.util.Arrays; 33import java.util.EnumSet; 34import java.util.HashMap; 35import java.util.HashSet; 36import java.util.Map; 37import java.util.Set; 38 39import javax.lang.model.element.Modifier; 40import javax.lang.model.element.NestingKind; 41import javax.tools.JavaFileManager; 42import javax.tools.JavaFileObject; 43 44import com.sun.tools.javac.comp.Annotate; 45import com.sun.tools.javac.comp.Annotate.AnnotationTypeCompleter; 46import com.sun.tools.javac.code.*; 47import com.sun.tools.javac.code.Directive.*; 48import com.sun.tools.javac.code.Lint.LintCategory; 49import com.sun.tools.javac.code.Scope.WriteableScope; 50import com.sun.tools.javac.code.Symbol.*; 51import com.sun.tools.javac.code.Symtab; 52import com.sun.tools.javac.code.Type.*; 53import com.sun.tools.javac.comp.Annotate.AnnotationTypeMetadata; 54import com.sun.tools.javac.file.BaseFileManager; 55import com.sun.tools.javac.file.PathFileObject; 56import com.sun.tools.javac.jvm.ClassFile.NameAndType; 57import com.sun.tools.javac.jvm.ClassFile.Version; 58import com.sun.tools.javac.util.*; 59import com.sun.tools.javac.util.DefinedBy.Api; 60import com.sun.tools.javac.util.JCDiagnostic.DiagnosticPosition; 61 62import static com.sun.tools.javac.code.Flags.*; 63import static com.sun.tools.javac.code.Kinds.Kind.*; 64import static com.sun.tools.javac.code.TypeTag.ARRAY; 65import static com.sun.tools.javac.code.TypeTag.CLASS; 66import static com.sun.tools.javac.code.TypeTag.TYPEVAR; 67import static com.sun.tools.javac.jvm.ClassFile.*; 68import static com.sun.tools.javac.jvm.ClassFile.Version.*; 69 70import static com.sun.tools.javac.main.Option.*; 71 72/** This class provides operations to read a classfile into an internal 73 * representation. The internal representation is anchored in a 74 * ClassSymbol which contains in its scope symbol representations 75 * for all other definitions in the classfile. Top-level Classes themselves 76 * appear as members of the scopes of PackageSymbols. 77 * 78 * <p><b>This is NOT part of any supported API. 79 * If you write code that depends on this, you do so at your own risk. 80 * This code and its internal interfaces are subject to change or 81 * deletion without notice.</b> 82 */ 83public class ClassReader { 84 /** The context key for the class reader. */ 85 protected static final Context.Key<ClassReader> classReaderKey = new Context.Key<>(); 86 87 public static final int INITIAL_BUFFER_SIZE = 0x0fff0; 88 89 private final Annotate annotate; 90 91 /** Switch: verbose output. 92 */ 93 boolean verbose; 94 95 /** Switch: read constant pool and code sections. This switch is initially 96 * set to false but can be turned on from outside. 97 */ 98 public boolean readAllOfClassFile = false; 99 100 /** Switch: allow simplified varargs. 101 */ 102 boolean allowSimplifiedVarargs; 103 104 /** Switch: allow modules. 105 */ 106 boolean allowModules; 107 108 /** Lint option: warn about classfile issues 109 */ 110 boolean lintClassfile; 111 112 /** Switch: preserve parameter names from the variable table. 113 */ 114 public boolean saveParameterNames; 115 116 /** 117 * The currently selected profile. 118 */ 119 public final Profile profile; 120 121 /** The log to use for verbose output 122 */ 123 final Log log; 124 125 /** The symbol table. */ 126 Symtab syms; 127 128 Types types; 129 130 /** The name table. */ 131 final Names names; 132 133 /** Access to files 134 */ 135 private final JavaFileManager fileManager; 136 137 /** Factory for diagnostics 138 */ 139 JCDiagnostic.Factory diagFactory; 140 141 /** The current scope where type variables are entered. 142 */ 143 protected WriteableScope typevars; 144 145 private List<InterimUsesDirective> interimUses = List.nil(); 146 private List<InterimProvidesDirective> interimProvides = List.nil(); 147 148 /** The path name of the class file currently being read. 149 */ 150 protected JavaFileObject currentClassFile = null; 151 152 /** The class or method currently being read. 153 */ 154 protected Symbol currentOwner = null; 155 156 /** The module containing the class currently being read. 157 */ 158 protected ModuleSymbol currentModule = null; 159 160 /** The buffer containing the currently read class file. 161 */ 162 byte[] buf = new byte[INITIAL_BUFFER_SIZE]; 163 164 /** The current input pointer. 165 */ 166 protected int bp; 167 168 /** The objects of the constant pool. 169 */ 170 Object[] poolObj; 171 172 /** For every constant pool entry, an index into buf where the 173 * defining section of the entry is found. 174 */ 175 int[] poolIdx; 176 177 /** The major version number of the class file being read. */ 178 int majorVersion; 179 /** The minor version number of the class file being read. */ 180 int minorVersion; 181 182 /** A table to hold the constant pool indices for method parameter 183 * names, as given in LocalVariableTable attributes. 184 */ 185 int[] parameterNameIndices; 186 187 /** 188 * Whether or not any parameter names have been found. 189 */ 190 boolean haveParameterNameIndices; 191 192 /** Set this to false every time we start reading a method 193 * and are saving parameter names. Set it to true when we see 194 * MethodParameters, if it's set when we see a LocalVariableTable, 195 * then we ignore the parameter names from the LVT. 196 */ 197 boolean sawMethodParameters; 198 199 /** 200 * The set of attribute names for which warnings have been generated for the current class 201 */ 202 Set<Name> warnedAttrs = new HashSet<>(); 203 204 /** 205 * The prototype @Target Attribute.Compound if this class is an annotation annotated with 206 * @Target 207 */ 208 CompoundAnnotationProxy target; 209 210 /** 211 * The prototype @Repetable Attribute.Compound if this class is an annotation annotated with 212 * @Repeatable 213 */ 214 CompoundAnnotationProxy repeatable; 215 216 /** Get the ClassReader instance for this invocation. */ 217 public static ClassReader instance(Context context) { 218 ClassReader instance = context.get(classReaderKey); 219 if (instance == null) 220 instance = new ClassReader(context); 221 return instance; 222 } 223 224 /** Construct a new class reader. */ 225 protected ClassReader(Context context) { 226 context.put(classReaderKey, this); 227 annotate = Annotate.instance(context); 228 names = Names.instance(context); 229 syms = Symtab.instance(context); 230 types = Types.instance(context); 231 fileManager = context.get(JavaFileManager.class); 232 if (fileManager == null) 233 throw new AssertionError("FileManager initialization error"); 234 diagFactory = JCDiagnostic.Factory.instance(context); 235 236 log = Log.instance(context); 237 238 Options options = Options.instance(context); 239 verbose = options.isSet(VERBOSE); 240 241 Source source = Source.instance(context); 242 allowSimplifiedVarargs = source.allowSimplifiedVarargs(); 243 allowModules = source.allowModules(); 244 245 saveParameterNames = options.isSet("save-parameter-names"); 246 247 profile = Profile.instance(context); 248 249 typevars = WriteableScope.create(syms.noSymbol); 250 251 lintClassfile = Lint.instance(context).isEnabled(LintCategory.CLASSFILE); 252 253 initAttributeReaders(); 254 } 255 256 /** Add member to class unless it is synthetic. 257 */ 258 private void enterMember(ClassSymbol c, Symbol sym) { 259 // Synthetic members are not entered -- reason lost to history (optimization?). 260 // Lambda methods must be entered because they may have inner classes (which reference them) 261 if ((sym.flags_field & (SYNTHETIC|BRIDGE)) != SYNTHETIC || sym.name.startsWith(names.lambda)) 262 c.members_field.enter(sym); 263 } 264 265/************************************************************************ 266 * Error Diagnoses 267 ***********************************************************************/ 268 269 public ClassFinder.BadClassFile badClassFile(String key, Object... args) { 270 return new ClassFinder.BadClassFile ( 271 currentOwner.enclClass(), 272 currentClassFile, 273 diagFactory.fragment(key, args), 274 diagFactory); 275 } 276 277 public ClassFinder.BadEnclosingMethodAttr badEnclosingMethod(Object... args) { 278 return new ClassFinder.BadEnclosingMethodAttr ( 279 currentOwner.enclClass(), 280 currentClassFile, 281 diagFactory.fragment("bad.enclosing.method", args), 282 diagFactory); 283 } 284 285/************************************************************************ 286 * Buffer Access 287 ***********************************************************************/ 288 289 /** Read a character. 290 */ 291 char nextChar() { 292 return (char)(((buf[bp++] & 0xFF) << 8) + (buf[bp++] & 0xFF)); 293 } 294 295 /** Read a byte. 296 */ 297 int nextByte() { 298 return buf[bp++] & 0xFF; 299 } 300 301 /** Read an integer. 302 */ 303 int nextInt() { 304 return 305 ((buf[bp++] & 0xFF) << 24) + 306 ((buf[bp++] & 0xFF) << 16) + 307 ((buf[bp++] & 0xFF) << 8) + 308 (buf[bp++] & 0xFF); 309 } 310 311 /** Extract a character at position bp from buf. 312 */ 313 char getChar(int bp) { 314 return 315 (char)(((buf[bp] & 0xFF) << 8) + (buf[bp+1] & 0xFF)); 316 } 317 318 /** Extract an integer at position bp from buf. 319 */ 320 int getInt(int bp) { 321 return 322 ((buf[bp] & 0xFF) << 24) + 323 ((buf[bp+1] & 0xFF) << 16) + 324 ((buf[bp+2] & 0xFF) << 8) + 325 (buf[bp+3] & 0xFF); 326 } 327 328 329 /** Extract a long integer at position bp from buf. 330 */ 331 long getLong(int bp) { 332 DataInputStream bufin = 333 new DataInputStream(new ByteArrayInputStream(buf, bp, 8)); 334 try { 335 return bufin.readLong(); 336 } catch (IOException e) { 337 throw new AssertionError(e); 338 } 339 } 340 341 /** Extract a float at position bp from buf. 342 */ 343 float getFloat(int bp) { 344 DataInputStream bufin = 345 new DataInputStream(new ByteArrayInputStream(buf, bp, 4)); 346 try { 347 return bufin.readFloat(); 348 } catch (IOException e) { 349 throw new AssertionError(e); 350 } 351 } 352 353 /** Extract a double at position bp from buf. 354 */ 355 double getDouble(int bp) { 356 DataInputStream bufin = 357 new DataInputStream(new ByteArrayInputStream(buf, bp, 8)); 358 try { 359 return bufin.readDouble(); 360 } catch (IOException e) { 361 throw new AssertionError(e); 362 } 363 } 364 365/************************************************************************ 366 * Constant Pool Access 367 ***********************************************************************/ 368 369 /** Index all constant pool entries, writing their start addresses into 370 * poolIdx. 371 */ 372 void indexPool() { 373 poolIdx = new int[nextChar()]; 374 poolObj = new Object[poolIdx.length]; 375 int i = 1; 376 while (i < poolIdx.length) { 377 poolIdx[i++] = bp; 378 byte tag = buf[bp++]; 379 switch (tag) { 380 case CONSTANT_Utf8: case CONSTANT_Unicode: { 381 int len = nextChar(); 382 bp = bp + len; 383 break; 384 } 385 case CONSTANT_Class: 386 case CONSTANT_String: 387 case CONSTANT_MethodType: 388 bp = bp + 2; 389 break; 390 case CONSTANT_MethodHandle: 391 bp = bp + 3; 392 break; 393 case CONSTANT_Fieldref: 394 case CONSTANT_Methodref: 395 case CONSTANT_InterfaceMethodref: 396 case CONSTANT_NameandType: 397 case CONSTANT_Integer: 398 case CONSTANT_Float: 399 case CONSTANT_InvokeDynamic: 400 bp = bp + 4; 401 break; 402 case CONSTANT_Long: 403 case CONSTANT_Double: 404 bp = bp + 8; 405 i++; 406 break; 407 default: 408 throw badClassFile("bad.const.pool.tag.at", 409 Byte.toString(tag), 410 Integer.toString(bp -1)); 411 } 412 } 413 } 414 415 /** Read constant pool entry at start address i, use pool as a cache. 416 */ 417 Object readPool(int i) { 418 Object result = poolObj[i]; 419 if (result != null) return result; 420 421 int index = poolIdx[i]; 422 if (index == 0) return null; 423 424 byte tag = buf[index]; 425 switch (tag) { 426 case CONSTANT_Utf8: 427 poolObj[i] = names.fromUtf(buf, index + 3, getChar(index + 1)); 428 break; 429 case CONSTANT_Unicode: 430 throw badClassFile("unicode.str.not.supported"); 431 case CONSTANT_Class: 432 poolObj[i] = readClassOrType(getChar(index + 1)); 433 break; 434 case CONSTANT_String: 435 // FIXME: (footprint) do not use toString here 436 poolObj[i] = readName(getChar(index + 1)).toString(); 437 break; 438 case CONSTANT_Fieldref: { 439 ClassSymbol owner = readClassSymbol(getChar(index + 1)); 440 NameAndType nt = readNameAndType(getChar(index + 3)); 441 poolObj[i] = new VarSymbol(0, nt.name, nt.uniqueType.type, owner); 442 break; 443 } 444 case CONSTANT_Methodref: 445 case CONSTANT_InterfaceMethodref: { 446 ClassSymbol owner = readClassSymbol(getChar(index + 1)); 447 NameAndType nt = readNameAndType(getChar(index + 3)); 448 poolObj[i] = new MethodSymbol(0, nt.name, nt.uniqueType.type, owner); 449 break; 450 } 451 case CONSTANT_NameandType: 452 poolObj[i] = new NameAndType( 453 readName(getChar(index + 1)), 454 readType(getChar(index + 3)), types); 455 break; 456 case CONSTANT_Integer: 457 poolObj[i] = getInt(index + 1); 458 break; 459 case CONSTANT_Float: 460 poolObj[i] = Float.valueOf(getFloat(index + 1)); 461 break; 462 case CONSTANT_Long: 463 poolObj[i] = Long.valueOf(getLong(index + 1)); 464 break; 465 case CONSTANT_Double: 466 poolObj[i] = Double.valueOf(getDouble(index + 1)); 467 break; 468 case CONSTANT_MethodHandle: 469 skipBytes(4); 470 break; 471 case CONSTANT_MethodType: 472 skipBytes(3); 473 break; 474 case CONSTANT_InvokeDynamic: 475 skipBytes(5); 476 break; 477 default: 478 throw badClassFile("bad.const.pool.tag", Byte.toString(tag)); 479 } 480 return poolObj[i]; 481 } 482 483 /** Read signature and convert to type. 484 */ 485 Type readType(int i) { 486 int index = poolIdx[i]; 487 return sigToType(buf, index + 3, getChar(index + 1)); 488 } 489 490 /** If name is an array type or class signature, return the 491 * corresponding type; otherwise return a ClassSymbol with given name. 492 */ 493 Object readClassOrType(int i) { 494 int index = poolIdx[i]; 495 int len = getChar(index + 1); 496 int start = index + 3; 497 Assert.check(buf[start] == '[' || buf[start + len - 1] != ';'); 498 // by the above assertion, the following test can be 499 // simplified to (buf[start] == '[') 500 return (buf[start] == '[' || buf[start + len - 1] == ';') 501 ? (Object)sigToType(buf, start, len) 502 : (Object)enterClass(names.fromUtf(internalize(buf, start, 503 len))); 504 } 505 506 /** Read signature and convert to type parameters. 507 */ 508 List<Type> readTypeParams(int i) { 509 int index = poolIdx[i]; 510 return sigToTypeParams(buf, index + 3, getChar(index + 1)); 511 } 512 513 /** Read class entry. 514 */ 515 ClassSymbol readClassSymbol(int i) { 516 Object obj = readPool(i); 517 if (obj != null && !(obj instanceof ClassSymbol)) 518 throw badClassFile("bad.const.pool.entry", 519 currentClassFile.toString(), 520 "CONSTANT_Class_info", i); 521 return (ClassSymbol)obj; 522 } 523 524 Name readClassName(int i) { 525 int index = poolIdx[i]; 526 if (index == 0) return null; 527 byte tag = buf[index]; 528 if (tag != CONSTANT_Class) { 529 throw badClassFile("bad.const.pool.entry", 530 currentClassFile.toString(), 531 "CONSTANT_Class_info", i); 532 } 533 int nameIndex = poolIdx[getChar(index + 1)]; 534 int len = getChar(nameIndex + 1); 535 int start = nameIndex + 3; 536 if (buf[start] == '[' || buf[start + len - 1] == ';') 537 throw badClassFile("wrong class name"); //TODO: proper diagnostics 538 return names.fromUtf(internalize(buf, start, len)); 539 } 540 541 /** Read name. 542 */ 543 Name readName(int i) { 544 Object obj = readPool(i); 545 if (obj != null && !(obj instanceof Name)) 546 throw badClassFile("bad.const.pool.entry", 547 currentClassFile.toString(), 548 "CONSTANT_Utf8_info or CONSTANT_String_info", i); 549 return (Name)obj; 550 } 551 552 /** Read name and type. 553 */ 554 NameAndType readNameAndType(int i) { 555 Object obj = readPool(i); 556 if (obj != null && !(obj instanceof NameAndType)) 557 throw badClassFile("bad.const.pool.entry", 558 currentClassFile.toString(), 559 "CONSTANT_NameAndType_info", i); 560 return (NameAndType)obj; 561 } 562 563 /** Read the class name of a module-info.class file. 564 * The name is stored in a CONSTANT_Class entry, where the 565 * class name is of the form module-name.module-info. 566 */ 567 Name readModuleInfoName(int i) { 568 int classIndex = poolIdx[i]; 569 if (buf[classIndex] == CONSTANT_Class) { 570 int utf8Index = poolIdx[getChar(classIndex + 1)]; 571 if (buf[utf8Index] == CONSTANT_Utf8) { 572 int len = getChar(utf8Index + 1); 573 int start = utf8Index + 3; 574 return names.fromUtf(internalize(buf, start, len)); 575 } 576 } 577 throw badClassFile("bad.module-info.name"); 578 } 579 580 /** Read requires_flags. 581 */ 582 Set<RequiresFlag> readRequiresFlags(int flags) { 583 Set<RequiresFlag> set = EnumSet.noneOf(RequiresFlag.class); 584 for (RequiresFlag f: RequiresFlag.values()) { 585 if ((flags & f.value) != 0) 586 set.add(f); 587 } 588 return set; 589 } 590 591/************************************************************************ 592 * Reading Types 593 ***********************************************************************/ 594 595 /** The unread portion of the currently read type is 596 * signature[sigp..siglimit-1]. 597 */ 598 byte[] signature; 599 int sigp; 600 int siglimit; 601 boolean sigEnterPhase = false; 602 603 /** Convert signature to type, where signature is a byte array segment. 604 */ 605 Type sigToType(byte[] sig, int offset, int len) { 606 signature = sig; 607 sigp = offset; 608 siglimit = offset + len; 609 return sigToType(); 610 } 611 612 /** Convert signature to type, where signature is implicit. 613 */ 614 Type sigToType() { 615 switch ((char) signature[sigp]) { 616 case 'T': 617 sigp++; 618 int start = sigp; 619 while (signature[sigp] != ';') sigp++; 620 sigp++; 621 return sigEnterPhase 622 ? Type.noType 623 : findTypeVar(names.fromUtf(signature, start, sigp - 1 - start)); 624 case '+': { 625 sigp++; 626 Type t = sigToType(); 627 return new WildcardType(t, BoundKind.EXTENDS, syms.boundClass); 628 } 629 case '*': 630 sigp++; 631 return new WildcardType(syms.objectType, BoundKind.UNBOUND, 632 syms.boundClass); 633 case '-': { 634 sigp++; 635 Type t = sigToType(); 636 return new WildcardType(t, BoundKind.SUPER, syms.boundClass); 637 } 638 case 'B': 639 sigp++; 640 return syms.byteType; 641 case 'C': 642 sigp++; 643 return syms.charType; 644 case 'D': 645 sigp++; 646 return syms.doubleType; 647 case 'F': 648 sigp++; 649 return syms.floatType; 650 case 'I': 651 sigp++; 652 return syms.intType; 653 case 'J': 654 sigp++; 655 return syms.longType; 656 case 'L': 657 { 658 // int oldsigp = sigp; 659 Type t = classSigToType(); 660 if (sigp < siglimit && signature[sigp] == '.') 661 throw badClassFile("deprecated inner class signature syntax " + 662 "(please recompile from source)"); 663 /* 664 System.err.println(" decoded " + 665 new String(signature, oldsigp, sigp-oldsigp) + 666 " => " + t + " outer " + t.outer()); 667 */ 668 return t; 669 } 670 case 'S': 671 sigp++; 672 return syms.shortType; 673 case 'V': 674 sigp++; 675 return syms.voidType; 676 case 'Z': 677 sigp++; 678 return syms.booleanType; 679 case '[': 680 sigp++; 681 return new ArrayType(sigToType(), syms.arrayClass); 682 case '(': 683 sigp++; 684 List<Type> argtypes = sigToTypes(')'); 685 Type restype = sigToType(); 686 List<Type> thrown = List.nil(); 687 while (signature[sigp] == '^') { 688 sigp++; 689 thrown = thrown.prepend(sigToType()); 690 } 691 // if there is a typevar in the throws clause we should state it. 692 for (List<Type> l = thrown; l.nonEmpty(); l = l.tail) { 693 if (l.head.hasTag(TYPEVAR)) { 694 l.head.tsym.flags_field |= THROWS; 695 } 696 } 697 return new MethodType(argtypes, 698 restype, 699 thrown.reverse(), 700 syms.methodClass); 701 case '<': 702 typevars = typevars.dup(currentOwner); 703 Type poly = new ForAll(sigToTypeParams(), sigToType()); 704 typevars = typevars.leave(); 705 return poly; 706 default: 707 throw badClassFile("bad.signature", 708 Convert.utf2string(signature, sigp, 10)); 709 } 710 } 711 712 byte[] signatureBuffer = new byte[0]; 713 int sbp = 0; 714 /** Convert class signature to type, where signature is implicit. 715 */ 716 Type classSigToType() { 717 if (signature[sigp] != 'L') 718 throw badClassFile("bad.class.signature", 719 Convert.utf2string(signature, sigp, 10)); 720 sigp++; 721 Type outer = Type.noType; 722 int startSbp = sbp; 723 724 while (true) { 725 final byte c = signature[sigp++]; 726 switch (c) { 727 728 case ';': { // end 729 ClassSymbol t = enterClass(names.fromUtf(signatureBuffer, 730 startSbp, 731 sbp - startSbp)); 732 733 try { 734 return (outer == Type.noType) ? 735 t.erasure(types) : 736 new ClassType(outer, List.<Type>nil(), t); 737 } finally { 738 sbp = startSbp; 739 } 740 } 741 742 case '<': // generic arguments 743 ClassSymbol t = enterClass(names.fromUtf(signatureBuffer, 744 startSbp, 745 sbp - startSbp)); 746 outer = new ClassType(outer, sigToTypes('>'), t) { 747 boolean completed = false; 748 @Override @DefinedBy(Api.LANGUAGE_MODEL) 749 public Type getEnclosingType() { 750 if (!completed) { 751 completed = true; 752 tsym.complete(); 753 Type enclosingType = tsym.type.getEnclosingType(); 754 if (enclosingType != Type.noType) { 755 List<Type> typeArgs = 756 super.getEnclosingType().allparams(); 757 List<Type> typeParams = 758 enclosingType.allparams(); 759 if (typeParams.length() != typeArgs.length()) { 760 // no "rare" types 761 super.setEnclosingType(types.erasure(enclosingType)); 762 } else { 763 super.setEnclosingType(types.subst(enclosingType, 764 typeParams, 765 typeArgs)); 766 } 767 } else { 768 super.setEnclosingType(Type.noType); 769 } 770 } 771 return super.getEnclosingType(); 772 } 773 @Override 774 public void setEnclosingType(Type outer) { 775 throw new UnsupportedOperationException(); 776 } 777 }; 778 switch (signature[sigp++]) { 779 case ';': 780 if (sigp < signature.length && signature[sigp] == '.') { 781 // support old-style GJC signatures 782 // The signature produced was 783 // Lfoo/Outer<Lfoo/X;>;.Lfoo/Outer$Inner<Lfoo/Y;>; 784 // rather than say 785 // Lfoo/Outer<Lfoo/X;>.Inner<Lfoo/Y;>; 786 // so we skip past ".Lfoo/Outer$" 787 sigp += (sbp - startSbp) + // "foo/Outer" 788 3; // ".L" and "$" 789 signatureBuffer[sbp++] = (byte)'$'; 790 break; 791 } else { 792 sbp = startSbp; 793 return outer; 794 } 795 case '.': 796 signatureBuffer[sbp++] = (byte)'$'; 797 break; 798 default: 799 throw new AssertionError(signature[sigp-1]); 800 } 801 continue; 802 803 case '.': 804 //we have seen an enclosing non-generic class 805 if (outer != Type.noType) { 806 t = enterClass(names.fromUtf(signatureBuffer, 807 startSbp, 808 sbp - startSbp)); 809 outer = new ClassType(outer, List.<Type>nil(), t); 810 } 811 signatureBuffer[sbp++] = (byte)'$'; 812 continue; 813 case '/': 814 signatureBuffer[sbp++] = (byte)'.'; 815 continue; 816 default: 817 signatureBuffer[sbp++] = c; 818 continue; 819 } 820 } 821 } 822 823 /** Convert (implicit) signature to list of types 824 * until `terminator' is encountered. 825 */ 826 List<Type> sigToTypes(char terminator) { 827 List<Type> head = List.of(null); 828 List<Type> tail = head; 829 while (signature[sigp] != terminator) 830 tail = tail.setTail(List.of(sigToType())); 831 sigp++; 832 return head.tail; 833 } 834 835 /** Convert signature to type parameters, where signature is a byte 836 * array segment. 837 */ 838 List<Type> sigToTypeParams(byte[] sig, int offset, int len) { 839 signature = sig; 840 sigp = offset; 841 siglimit = offset + len; 842 return sigToTypeParams(); 843 } 844 845 /** Convert signature to type parameters, where signature is implicit. 846 */ 847 List<Type> sigToTypeParams() { 848 List<Type> tvars = List.nil(); 849 if (signature[sigp] == '<') { 850 sigp++; 851 int start = sigp; 852 sigEnterPhase = true; 853 while (signature[sigp] != '>') 854 tvars = tvars.prepend(sigToTypeParam()); 855 sigEnterPhase = false; 856 sigp = start; 857 while (signature[sigp] != '>') 858 sigToTypeParam(); 859 sigp++; 860 } 861 return tvars.reverse(); 862 } 863 864 /** Convert (implicit) signature to type parameter. 865 */ 866 Type sigToTypeParam() { 867 int start = sigp; 868 while (signature[sigp] != ':') sigp++; 869 Name name = names.fromUtf(signature, start, sigp - start); 870 TypeVar tvar; 871 if (sigEnterPhase) { 872 tvar = new TypeVar(name, currentOwner, syms.botType); 873 typevars.enter(tvar.tsym); 874 } else { 875 tvar = (TypeVar)findTypeVar(name); 876 } 877 List<Type> bounds = List.nil(); 878 boolean allInterfaces = false; 879 if (signature[sigp] == ':' && signature[sigp+1] == ':') { 880 sigp++; 881 allInterfaces = true; 882 } 883 while (signature[sigp] == ':') { 884 sigp++; 885 bounds = bounds.prepend(sigToType()); 886 } 887 if (!sigEnterPhase) { 888 types.setBounds(tvar, bounds.reverse(), allInterfaces); 889 } 890 return tvar; 891 } 892 893 /** Find type variable with given name in `typevars' scope. 894 */ 895 Type findTypeVar(Name name) { 896 Symbol s = typevars.findFirst(name); 897 if (s != null) { 898 return s.type; 899 } else { 900 if (readingClassAttr) { 901 // While reading the class attribute, the supertypes 902 // might refer to a type variable from an enclosing element 903 // (method or class). 904 // If the type variable is defined in the enclosing class, 905 // we can actually find it in 906 // currentOwner.owner.type.getTypeArguments() 907 // However, until we have read the enclosing method attribute 908 // we don't know for sure if this owner is correct. It could 909 // be a method and there is no way to tell before reading the 910 // enclosing method attribute. 911 TypeVar t = new TypeVar(name, currentOwner, syms.botType); 912 missingTypeVariables = missingTypeVariables.prepend(t); 913 // System.err.println("Missing type var " + name); 914 return t; 915 } 916 throw badClassFile("undecl.type.var", name); 917 } 918 } 919 920/************************************************************************ 921 * Reading Attributes 922 ***********************************************************************/ 923 924 protected enum AttributeKind { CLASS, MEMBER } 925 926 protected abstract class AttributeReader { 927 protected AttributeReader(Name name, ClassFile.Version version, Set<AttributeKind> kinds) { 928 this.name = name; 929 this.version = version; 930 this.kinds = kinds; 931 } 932 933 protected boolean accepts(AttributeKind kind) { 934 if (kinds.contains(kind)) { 935 if (majorVersion > version.major || (majorVersion == version.major && minorVersion >= version.minor)) 936 return true; 937 938 if (lintClassfile && !warnedAttrs.contains(name)) { 939 JavaFileObject prev = log.useSource(currentClassFile); 940 try { 941 log.warning(LintCategory.CLASSFILE, (DiagnosticPosition) null, "future.attr", 942 name, version.major, version.minor, majorVersion, minorVersion); 943 } finally { 944 log.useSource(prev); 945 } 946 warnedAttrs.add(name); 947 } 948 } 949 return false; 950 } 951 952 protected abstract void read(Symbol sym, int attrLen); 953 954 protected final Name name; 955 protected final ClassFile.Version version; 956 protected final Set<AttributeKind> kinds; 957 } 958 959 protected Set<AttributeKind> CLASS_ATTRIBUTE = 960 EnumSet.of(AttributeKind.CLASS); 961 protected Set<AttributeKind> MEMBER_ATTRIBUTE = 962 EnumSet.of(AttributeKind.MEMBER); 963 protected Set<AttributeKind> CLASS_OR_MEMBER_ATTRIBUTE = 964 EnumSet.of(AttributeKind.CLASS, AttributeKind.MEMBER); 965 966 protected Map<Name, AttributeReader> attributeReaders = new HashMap<>(); 967 968 private void initAttributeReaders() { 969 AttributeReader[] readers = { 970 // v45.3 attributes 971 972 new AttributeReader(names.Code, V45_3, MEMBER_ATTRIBUTE) { 973 protected void read(Symbol sym, int attrLen) { 974 if (readAllOfClassFile || saveParameterNames) 975 ((MethodSymbol)sym).code = readCode(sym); 976 else 977 bp = bp + attrLen; 978 } 979 }, 980 981 new AttributeReader(names.ConstantValue, V45_3, MEMBER_ATTRIBUTE) { 982 protected void read(Symbol sym, int attrLen) { 983 Object v = readPool(nextChar()); 984 // Ignore ConstantValue attribute if field not final. 985 if ((sym.flags() & FINAL) != 0) 986 ((VarSymbol) sym).setData(v); 987 } 988 }, 989 990 new AttributeReader(names.Deprecated, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) { 991 protected void read(Symbol sym, int attrLen) { 992 sym.flags_field |= DEPRECATED; 993 } 994 }, 995 996 new AttributeReader(names.Exceptions, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) { 997 protected void read(Symbol sym, int attrLen) { 998 int nexceptions = nextChar(); 999 List<Type> thrown = List.nil(); 1000 for (int j = 0; j < nexceptions; j++) 1001 thrown = thrown.prepend(readClassSymbol(nextChar()).type); 1002 if (sym.type.getThrownTypes().isEmpty()) 1003 sym.type.asMethodType().thrown = thrown.reverse(); 1004 } 1005 }, 1006 1007 new AttributeReader(names.InnerClasses, V45_3, CLASS_ATTRIBUTE) { 1008 protected void read(Symbol sym, int attrLen) { 1009 ClassSymbol c = (ClassSymbol) sym; 1010 if (currentModule.module_info == c) { 1011 //prevent entering the classes too soon: 1012 skipInnerClasses(); 1013 } else { 1014 readInnerClasses(c); 1015 } 1016 } 1017 }, 1018 1019 new AttributeReader(names.LocalVariableTable, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) { 1020 protected void read(Symbol sym, int attrLen) { 1021 int newbp = bp + attrLen; 1022 if (saveParameterNames && !sawMethodParameters) { 1023 // Pick up parameter names from the variable table. 1024 // Parameter names are not explicitly identified as such, 1025 // but all parameter name entries in the LocalVariableTable 1026 // have a start_pc of 0. Therefore, we record the name 1027 // indicies of all slots with a start_pc of zero in the 1028 // parameterNameIndicies array. 1029 // Note that this implicitly honors the JVMS spec that 1030 // there may be more than one LocalVariableTable, and that 1031 // there is no specified ordering for the entries. 1032 int numEntries = nextChar(); 1033 for (int i = 0; i < numEntries; i++) { 1034 int start_pc = nextChar(); 1035 int length = nextChar(); 1036 int nameIndex = nextChar(); 1037 int sigIndex = nextChar(); 1038 int register = nextChar(); 1039 if (start_pc == 0) { 1040 // ensure array large enough 1041 if (register >= parameterNameIndices.length) { 1042 int newSize = 1043 Math.max(register + 1, parameterNameIndices.length + 8); 1044 parameterNameIndices = 1045 Arrays.copyOf(parameterNameIndices, newSize); 1046 } 1047 parameterNameIndices[register] = nameIndex; 1048 haveParameterNameIndices = true; 1049 } 1050 } 1051 } 1052 bp = newbp; 1053 } 1054 }, 1055 1056 new AttributeReader(names.SourceFile, V45_3, CLASS_ATTRIBUTE) { 1057 protected void read(Symbol sym, int attrLen) { 1058 ClassSymbol c = (ClassSymbol) sym; 1059 Name n = readName(nextChar()); 1060 c.sourcefile = new SourceFileObject(n, c.flatname); 1061 // If the class is a toplevel class, originating from a Java source file, 1062 // but the class name does not match the file name, then it is 1063 // an auxiliary class. 1064 String sn = n.toString(); 1065 if (c.owner.kind == PCK && 1066 sn.endsWith(".java") && 1067 !sn.equals(c.name.toString()+".java")) { 1068 c.flags_field |= AUXILIARY; 1069 } 1070 } 1071 }, 1072 1073 new AttributeReader(names.Synthetic, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) { 1074 protected void read(Symbol sym, int attrLen) { 1075 sym.flags_field |= SYNTHETIC; 1076 } 1077 }, 1078 1079 // standard v49 attributes 1080 1081 new AttributeReader(names.EnclosingMethod, V49, CLASS_ATTRIBUTE) { 1082 protected void read(Symbol sym, int attrLen) { 1083 int newbp = bp + attrLen; 1084 readEnclosingMethodAttr(sym); 1085 bp = newbp; 1086 } 1087 }, 1088 1089 new AttributeReader(names.Signature, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1090 protected void read(Symbol sym, int attrLen) { 1091 if (sym.kind == TYP) { 1092 ClassSymbol c = (ClassSymbol) sym; 1093 readingClassAttr = true; 1094 try { 1095 ClassType ct1 = (ClassType)c.type; 1096 Assert.check(c == currentOwner); 1097 ct1.typarams_field = readTypeParams(nextChar()); 1098 ct1.supertype_field = sigToType(); 1099 ListBuffer<Type> is = new ListBuffer<>(); 1100 while (sigp != siglimit) is.append(sigToType()); 1101 ct1.interfaces_field = is.toList(); 1102 } finally { 1103 readingClassAttr = false; 1104 } 1105 } else { 1106 List<Type> thrown = sym.type.getThrownTypes(); 1107 sym.type = readType(nextChar()); 1108 //- System.err.println(" # " + sym.type); 1109 if (sym.kind == MTH && sym.type.getThrownTypes().isEmpty()) 1110 sym.type.asMethodType().thrown = thrown; 1111 1112 } 1113 } 1114 }, 1115 1116 // v49 annotation attributes 1117 1118 new AttributeReader(names.AnnotationDefault, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1119 protected void read(Symbol sym, int attrLen) { 1120 attachAnnotationDefault(sym); 1121 } 1122 }, 1123 1124 new AttributeReader(names.RuntimeInvisibleAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1125 protected void read(Symbol sym, int attrLen) { 1126 attachAnnotations(sym); 1127 } 1128 }, 1129 1130 new AttributeReader(names.RuntimeInvisibleParameterAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1131 protected void read(Symbol sym, int attrLen) { 1132 attachParameterAnnotations(sym); 1133 } 1134 }, 1135 1136 new AttributeReader(names.RuntimeVisibleAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1137 protected void read(Symbol sym, int attrLen) { 1138 attachAnnotations(sym); 1139 } 1140 }, 1141 1142 new AttributeReader(names.RuntimeVisibleParameterAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1143 protected void read(Symbol sym, int attrLen) { 1144 attachParameterAnnotations(sym); 1145 } 1146 }, 1147 1148 // additional "legacy" v49 attributes, superceded by flags 1149 1150 new AttributeReader(names.Annotation, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1151 protected void read(Symbol sym, int attrLen) { 1152 sym.flags_field |= ANNOTATION; 1153 } 1154 }, 1155 1156 new AttributeReader(names.Bridge, V49, MEMBER_ATTRIBUTE) { 1157 protected void read(Symbol sym, int attrLen) { 1158 sym.flags_field |= BRIDGE; 1159 } 1160 }, 1161 1162 new AttributeReader(names.Enum, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1163 protected void read(Symbol sym, int attrLen) { 1164 sym.flags_field |= ENUM; 1165 } 1166 }, 1167 1168 new AttributeReader(names.Varargs, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1169 protected void read(Symbol sym, int attrLen) { 1170 sym.flags_field |= VARARGS; 1171 } 1172 }, 1173 1174 new AttributeReader(names.RuntimeVisibleTypeAnnotations, V52, CLASS_OR_MEMBER_ATTRIBUTE) { 1175 protected void read(Symbol sym, int attrLen) { 1176 attachTypeAnnotations(sym); 1177 } 1178 }, 1179 1180 new AttributeReader(names.RuntimeInvisibleTypeAnnotations, V52, CLASS_OR_MEMBER_ATTRIBUTE) { 1181 protected void read(Symbol sym, int attrLen) { 1182 attachTypeAnnotations(sym); 1183 } 1184 }, 1185 1186 // The following attributes for a Code attribute are not currently handled 1187 // StackMapTable 1188 // SourceDebugExtension 1189 // LineNumberTable 1190 // LocalVariableTypeTable 1191 1192 // standard v52 attributes 1193 1194 new AttributeReader(names.MethodParameters, V52, MEMBER_ATTRIBUTE) { 1195 protected void read(Symbol sym, int attrlen) { 1196 int newbp = bp + attrlen; 1197 if (saveParameterNames) { 1198 sawMethodParameters = true; 1199 int numEntries = nextByte(); 1200 parameterNameIndices = new int[numEntries]; 1201 haveParameterNameIndices = true; 1202 for (int i = 0; i < numEntries; i++) { 1203 int nameIndex = nextChar(); 1204 int flags = nextChar(); 1205 parameterNameIndices[i] = nameIndex; 1206 } 1207 } 1208 bp = newbp; 1209 } 1210 }, 1211 1212 // standard v53 attributes 1213 1214 new AttributeReader(names.Module, V53, CLASS_ATTRIBUTE) { 1215 @Override 1216 protected boolean accepts(AttributeKind kind) { 1217 return super.accepts(kind) && allowModules; 1218 } 1219 protected void read(Symbol sym, int attrLen) { 1220 if (sym.kind == TYP && sym.owner.kind == MDL) { 1221 ModuleSymbol msym = (ModuleSymbol) sym.owner; 1222 ListBuffer<Directive> directives = new ListBuffer<>(); 1223 1224 ListBuffer<RequiresDirective> requires = new ListBuffer<>(); 1225 int nrequires = nextChar(); 1226 for (int i = 0; i < nrequires; i++) { 1227 Name name = readName(nextChar()); 1228 ModuleSymbol rsym = syms.enterModule(name); 1229 Set<RequiresFlag> flags = readRequiresFlags(nextChar()); 1230 requires.add(new RequiresDirective(rsym, flags)); 1231 } 1232 msym.requires = requires.toList(); 1233 directives.addAll(msym.requires); 1234 1235 ListBuffer<ExportsDirective> exports = new ListBuffer<>(); 1236 int nexports = nextChar(); 1237 for (int i = 0; i < nexports; i++) { 1238 Name n = readName(nextChar()); 1239 PackageSymbol p = syms.enterPackage(currentModule, names.fromUtf(internalize(n))); 1240 int nto = nextChar(); 1241 List<ModuleSymbol> to; 1242 if (nto == 0) { 1243 to = null; 1244 } else { 1245 ListBuffer<ModuleSymbol> lb = new ListBuffer<>(); 1246 for (int t = 0; t < nto; t++) 1247 lb.append(syms.enterModule(readName(nextChar()))); 1248 to = lb.toList(); 1249 } 1250 exports.add(new ExportsDirective(p, to)); 1251 } 1252 msym.exports = exports.toList(); 1253 directives.addAll(msym.exports); 1254 1255 msym.directives = directives.toList(); 1256 1257 ListBuffer<InterimUsesDirective> uses = new ListBuffer<>(); 1258 int nuses = nextChar(); 1259 for (int i = 0; i < nuses; i++) { 1260 Name srvc = readClassName(nextChar()); 1261 uses.add(new InterimUsesDirective(srvc)); 1262 } 1263 interimUses = uses.toList(); 1264 1265 ListBuffer<InterimProvidesDirective> provides = new ListBuffer<>(); 1266 int nprovides = nextChar(); 1267 for (int i = 0; i < nprovides; i++) { 1268 Name srvc = readClassName(nextChar()); 1269 Name impl = readClassName(nextChar()); 1270 provides.add(new InterimProvidesDirective(srvc, impl)); 1271 } 1272 interimProvides = provides.toList(); 1273 } 1274 } 1275 }, 1276 1277 new AttributeReader(names.Version, V53, CLASS_ATTRIBUTE) { 1278 @Override 1279 protected boolean accepts(AttributeKind kind) { 1280 return super.accepts(kind) && allowModules; 1281 } 1282 protected void read(Symbol sym, int attrLen) { 1283 if (sym.kind == TYP && sym.owner.kind == MDL) { 1284 ModuleSymbol msym = (ModuleSymbol) sym.owner; 1285 msym.version = readName(nextChar()); 1286 } 1287 } 1288 }, 1289 }; 1290 1291 for (AttributeReader r: readers) 1292 attributeReaders.put(r.name, r); 1293 } 1294 1295 protected void readEnclosingMethodAttr(Symbol sym) { 1296 // sym is a nested class with an "Enclosing Method" attribute 1297 // remove sym from it's current owners scope and place it in 1298 // the scope specified by the attribute 1299 sym.owner.members().remove(sym); 1300 ClassSymbol self = (ClassSymbol)sym; 1301 ClassSymbol c = readClassSymbol(nextChar()); 1302 NameAndType nt = readNameAndType(nextChar()); 1303 1304 if (c.members_field == null) 1305 throw badClassFile("bad.enclosing.class", self, c); 1306 1307 MethodSymbol m = findMethod(nt, c.members_field, self.flags()); 1308 if (nt != null && m == null) 1309 throw badEnclosingMethod(self); 1310 1311 self.name = simpleBinaryName(self.flatname, c.flatname) ; 1312 self.owner = m != null ? m : c; 1313 if (self.name.isEmpty()) 1314 self.fullname = names.empty; 1315 else 1316 self.fullname = ClassSymbol.formFullName(self.name, self.owner); 1317 1318 if (m != null) { 1319 ((ClassType)sym.type).setEnclosingType(m.type); 1320 } else if ((self.flags_field & STATIC) == 0) { 1321 ((ClassType)sym.type).setEnclosingType(c.type); 1322 } else { 1323 ((ClassType)sym.type).setEnclosingType(Type.noType); 1324 } 1325 enterTypevars(self); 1326 if (!missingTypeVariables.isEmpty()) { 1327 ListBuffer<Type> typeVars = new ListBuffer<>(); 1328 for (Type typevar : missingTypeVariables) { 1329 typeVars.append(findTypeVar(typevar.tsym.name)); 1330 } 1331 foundTypeVariables = typeVars.toList(); 1332 } else { 1333 foundTypeVariables = List.nil(); 1334 } 1335 } 1336 1337 // See java.lang.Class 1338 private Name simpleBinaryName(Name self, Name enclosing) { 1339 String simpleBinaryName = self.toString().substring(enclosing.toString().length()); 1340 if (simpleBinaryName.length() < 1 || simpleBinaryName.charAt(0) != '$') 1341 throw badClassFile("bad.enclosing.method", self); 1342 int index = 1; 1343 while (index < simpleBinaryName.length() && 1344 isAsciiDigit(simpleBinaryName.charAt(index))) 1345 index++; 1346 return names.fromString(simpleBinaryName.substring(index)); 1347 } 1348 1349 private MethodSymbol findMethod(NameAndType nt, Scope scope, long flags) { 1350 if (nt == null) 1351 return null; 1352 1353 MethodType type = nt.uniqueType.type.asMethodType(); 1354 1355 for (Symbol sym : scope.getSymbolsByName(nt.name)) { 1356 if (sym.kind == MTH && isSameBinaryType(sym.type.asMethodType(), type)) 1357 return (MethodSymbol)sym; 1358 } 1359 1360 if (nt.name != names.init) 1361 // not a constructor 1362 return null; 1363 if ((flags & INTERFACE) != 0) 1364 // no enclosing instance 1365 return null; 1366 if (nt.uniqueType.type.getParameterTypes().isEmpty()) 1367 // no parameters 1368 return null; 1369 1370 // A constructor of an inner class. 1371 // Remove the first argument (the enclosing instance) 1372 nt.setType(new MethodType(nt.uniqueType.type.getParameterTypes().tail, 1373 nt.uniqueType.type.getReturnType(), 1374 nt.uniqueType.type.getThrownTypes(), 1375 syms.methodClass)); 1376 // Try searching again 1377 return findMethod(nt, scope, flags); 1378 } 1379 1380 /** Similar to Types.isSameType but avoids completion */ 1381 private boolean isSameBinaryType(MethodType mt1, MethodType mt2) { 1382 List<Type> types1 = types.erasure(mt1.getParameterTypes()) 1383 .prepend(types.erasure(mt1.getReturnType())); 1384 List<Type> types2 = mt2.getParameterTypes().prepend(mt2.getReturnType()); 1385 while (!types1.isEmpty() && !types2.isEmpty()) { 1386 if (types1.head.tsym != types2.head.tsym) 1387 return false; 1388 types1 = types1.tail; 1389 types2 = types2.tail; 1390 } 1391 return types1.isEmpty() && types2.isEmpty(); 1392 } 1393 1394 /** 1395 * Character.isDigit answers <tt>true</tt> to some non-ascii 1396 * digits. This one does not. <b>copied from java.lang.Class</b> 1397 */ 1398 private static boolean isAsciiDigit(char c) { 1399 return '0' <= c && c <= '9'; 1400 } 1401 1402 /** Read member attributes. 1403 */ 1404 void readMemberAttrs(Symbol sym) { 1405 readAttrs(sym, AttributeKind.MEMBER); 1406 } 1407 1408 void readAttrs(Symbol sym, AttributeKind kind) { 1409 char ac = nextChar(); 1410 for (int i = 0; i < ac; i++) { 1411 Name attrName = readName(nextChar()); 1412 int attrLen = nextInt(); 1413 AttributeReader r = attributeReaders.get(attrName); 1414 if (r != null && r.accepts(kind)) 1415 r.read(sym, attrLen); 1416 else { 1417 bp = bp + attrLen; 1418 } 1419 } 1420 } 1421 1422 private boolean readingClassAttr = false; 1423 private List<Type> missingTypeVariables = List.nil(); 1424 private List<Type> foundTypeVariables = List.nil(); 1425 1426 /** Read class attributes. 1427 */ 1428 void readClassAttrs(ClassSymbol c) { 1429 readAttrs(c, AttributeKind.CLASS); 1430 } 1431 1432 /** Read code block. 1433 */ 1434 Code readCode(Symbol owner) { 1435 nextChar(); // max_stack 1436 nextChar(); // max_locals 1437 final int code_length = nextInt(); 1438 bp += code_length; 1439 final char exception_table_length = nextChar(); 1440 bp += exception_table_length * 8; 1441 readMemberAttrs(owner); 1442 return null; 1443 } 1444 1445/************************************************************************ 1446 * Reading Java-language annotations 1447 ***********************************************************************/ 1448 1449 /** Attach annotations. 1450 */ 1451 void attachAnnotations(final Symbol sym) { 1452 int numAttributes = nextChar(); 1453 if (numAttributes != 0) { 1454 ListBuffer<CompoundAnnotationProxy> proxies = new ListBuffer<>(); 1455 for (int i = 0; i<numAttributes; i++) { 1456 CompoundAnnotationProxy proxy = readCompoundAnnotation(); 1457 1458 if (proxy.type.tsym == syms.proprietaryType.tsym) 1459 sym.flags_field |= PROPRIETARY; 1460 else if (proxy.type.tsym == syms.profileType.tsym) { 1461 if (profile != Profile.DEFAULT) { 1462 for (Pair<Name,Attribute> v: proxy.values) { 1463 if (v.fst == names.value && v.snd instanceof Attribute.Constant) { 1464 Attribute.Constant c = (Attribute.Constant) v.snd; 1465 if (c.type == syms.intType && ((Integer) c.value) > profile.value) { 1466 sym.flags_field |= NOT_IN_PROFILE; 1467 } 1468 } 1469 } 1470 } 1471 } else { 1472 if (proxy.type.tsym == syms.annotationTargetType.tsym) { 1473 target = proxy; 1474 } else if (proxy.type.tsym == syms.repeatableType.tsym) { 1475 repeatable = proxy; 1476 } 1477 1478 proxies.append(proxy); 1479 } 1480 } 1481 annotate.normal(new AnnotationCompleter(sym, proxies.toList())); 1482 } 1483 } 1484 1485 /** Attach parameter annotations. 1486 */ 1487 void attachParameterAnnotations(final Symbol method) { 1488 final MethodSymbol meth = (MethodSymbol)method; 1489 int numParameters = buf[bp++] & 0xFF; 1490 List<VarSymbol> parameters = meth.params(); 1491 int pnum = 0; 1492 while (parameters.tail != null) { 1493 attachAnnotations(parameters.head); 1494 parameters = parameters.tail; 1495 pnum++; 1496 } 1497 if (pnum != numParameters) { 1498 throw badClassFile("bad.runtime.invisible.param.annotations", meth); 1499 } 1500 } 1501 1502 void attachTypeAnnotations(final Symbol sym) { 1503 int numAttributes = nextChar(); 1504 if (numAttributes != 0) { 1505 ListBuffer<TypeAnnotationProxy> proxies = new ListBuffer<>(); 1506 for (int i = 0; i < numAttributes; i++) 1507 proxies.append(readTypeAnnotation()); 1508 annotate.normal(new TypeAnnotationCompleter(sym, proxies.toList())); 1509 } 1510 } 1511 1512 /** Attach the default value for an annotation element. 1513 */ 1514 void attachAnnotationDefault(final Symbol sym) { 1515 final MethodSymbol meth = (MethodSymbol)sym; // only on methods 1516 final Attribute value = readAttributeValue(); 1517 1518 // The default value is set later during annotation. It might 1519 // be the case that the Symbol sym is annotated _after_ the 1520 // repeating instances that depend on this default value, 1521 // because of this we set an interim value that tells us this 1522 // element (most likely) has a default. 1523 // 1524 // Set interim value for now, reset just before we do this 1525 // properly at annotate time. 1526 meth.defaultValue = value; 1527 annotate.normal(new AnnotationDefaultCompleter(meth, value)); 1528 } 1529 1530 Type readTypeOrClassSymbol(int i) { 1531 // support preliminary jsr175-format class files 1532 if (buf[poolIdx[i]] == CONSTANT_Class) 1533 return readClassSymbol(i).type; 1534 return readType(i); 1535 } 1536 Type readEnumType(int i) { 1537 // support preliminary jsr175-format class files 1538 int index = poolIdx[i]; 1539 int length = getChar(index + 1); 1540 if (buf[index + length + 2] != ';') 1541 return enterClass(readName(i)).type; 1542 return readType(i); 1543 } 1544 1545 CompoundAnnotationProxy readCompoundAnnotation() { 1546 Type t = readTypeOrClassSymbol(nextChar()); 1547 int numFields = nextChar(); 1548 ListBuffer<Pair<Name,Attribute>> pairs = new ListBuffer<>(); 1549 for (int i=0; i<numFields; i++) { 1550 Name name = readName(nextChar()); 1551 Attribute value = readAttributeValue(); 1552 pairs.append(new Pair<>(name, value)); 1553 } 1554 return new CompoundAnnotationProxy(t, pairs.toList()); 1555 } 1556 1557 TypeAnnotationProxy readTypeAnnotation() { 1558 TypeAnnotationPosition position = readPosition(); 1559 CompoundAnnotationProxy proxy = readCompoundAnnotation(); 1560 1561 return new TypeAnnotationProxy(proxy, position); 1562 } 1563 1564 TypeAnnotationPosition readPosition() { 1565 int tag = nextByte(); // TargetType tag is a byte 1566 1567 if (!TargetType.isValidTargetTypeValue(tag)) 1568 throw badClassFile("bad.type.annotation.value", String.format("0x%02X", tag)); 1569 1570 TargetType type = TargetType.fromTargetTypeValue(tag); 1571 1572 switch (type) { 1573 // instanceof 1574 case INSTANCEOF: { 1575 final int offset = nextChar(); 1576 final TypeAnnotationPosition position = 1577 TypeAnnotationPosition.instanceOf(readTypePath()); 1578 position.offset = offset; 1579 return position; 1580 } 1581 // new expression 1582 case NEW: { 1583 final int offset = nextChar(); 1584 final TypeAnnotationPosition position = 1585 TypeAnnotationPosition.newObj(readTypePath()); 1586 position.offset = offset; 1587 return position; 1588 } 1589 // constructor/method reference receiver 1590 case CONSTRUCTOR_REFERENCE: { 1591 final int offset = nextChar(); 1592 final TypeAnnotationPosition position = 1593 TypeAnnotationPosition.constructorRef(readTypePath()); 1594 position.offset = offset; 1595 return position; 1596 } 1597 case METHOD_REFERENCE: { 1598 final int offset = nextChar(); 1599 final TypeAnnotationPosition position = 1600 TypeAnnotationPosition.methodRef(readTypePath()); 1601 position.offset = offset; 1602 return position; 1603 } 1604 // local variable 1605 case LOCAL_VARIABLE: { 1606 final int table_length = nextChar(); 1607 final int[] newLvarOffset = new int[table_length]; 1608 final int[] newLvarLength = new int[table_length]; 1609 final int[] newLvarIndex = new int[table_length]; 1610 1611 for (int i = 0; i < table_length; ++i) { 1612 newLvarOffset[i] = nextChar(); 1613 newLvarLength[i] = nextChar(); 1614 newLvarIndex[i] = nextChar(); 1615 } 1616 1617 final TypeAnnotationPosition position = 1618 TypeAnnotationPosition.localVariable(readTypePath()); 1619 position.lvarOffset = newLvarOffset; 1620 position.lvarLength = newLvarLength; 1621 position.lvarIndex = newLvarIndex; 1622 return position; 1623 } 1624 // resource variable 1625 case RESOURCE_VARIABLE: { 1626 final int table_length = nextChar(); 1627 final int[] newLvarOffset = new int[table_length]; 1628 final int[] newLvarLength = new int[table_length]; 1629 final int[] newLvarIndex = new int[table_length]; 1630 1631 for (int i = 0; i < table_length; ++i) { 1632 newLvarOffset[i] = nextChar(); 1633 newLvarLength[i] = nextChar(); 1634 newLvarIndex[i] = nextChar(); 1635 } 1636 1637 final TypeAnnotationPosition position = 1638 TypeAnnotationPosition.resourceVariable(readTypePath()); 1639 position.lvarOffset = newLvarOffset; 1640 position.lvarLength = newLvarLength; 1641 position.lvarIndex = newLvarIndex; 1642 return position; 1643 } 1644 // exception parameter 1645 case EXCEPTION_PARAMETER: { 1646 final int exception_index = nextChar(); 1647 final TypeAnnotationPosition position = 1648 TypeAnnotationPosition.exceptionParameter(readTypePath()); 1649 position.setExceptionIndex(exception_index); 1650 return position; 1651 } 1652 // method receiver 1653 case METHOD_RECEIVER: 1654 return TypeAnnotationPosition.methodReceiver(readTypePath()); 1655 // type parameter 1656 case CLASS_TYPE_PARAMETER: { 1657 final int parameter_index = nextByte(); 1658 return TypeAnnotationPosition 1659 .typeParameter(readTypePath(), parameter_index); 1660 } 1661 case METHOD_TYPE_PARAMETER: { 1662 final int parameter_index = nextByte(); 1663 return TypeAnnotationPosition 1664 .methodTypeParameter(readTypePath(), parameter_index); 1665 } 1666 // type parameter bound 1667 case CLASS_TYPE_PARAMETER_BOUND: { 1668 final int parameter_index = nextByte(); 1669 final int bound_index = nextByte(); 1670 return TypeAnnotationPosition 1671 .typeParameterBound(readTypePath(), parameter_index, 1672 bound_index); 1673 } 1674 case METHOD_TYPE_PARAMETER_BOUND: { 1675 final int parameter_index = nextByte(); 1676 final int bound_index = nextByte(); 1677 return TypeAnnotationPosition 1678 .methodTypeParameterBound(readTypePath(), parameter_index, 1679 bound_index); 1680 } 1681 // class extends or implements clause 1682 case CLASS_EXTENDS: { 1683 final int type_index = nextChar(); 1684 return TypeAnnotationPosition.classExtends(readTypePath(), 1685 type_index); 1686 } 1687 // throws 1688 case THROWS: { 1689 final int type_index = nextChar(); 1690 return TypeAnnotationPosition.methodThrows(readTypePath(), 1691 type_index); 1692 } 1693 // method parameter 1694 case METHOD_FORMAL_PARAMETER: { 1695 final int parameter_index = nextByte(); 1696 return TypeAnnotationPosition.methodParameter(readTypePath(), 1697 parameter_index); 1698 } 1699 // type cast 1700 case CAST: { 1701 final int offset = nextChar(); 1702 final int type_index = nextByte(); 1703 final TypeAnnotationPosition position = 1704 TypeAnnotationPosition.typeCast(readTypePath(), type_index); 1705 position.offset = offset; 1706 return position; 1707 } 1708 // method/constructor/reference type argument 1709 case CONSTRUCTOR_INVOCATION_TYPE_ARGUMENT: { 1710 final int offset = nextChar(); 1711 final int type_index = nextByte(); 1712 final TypeAnnotationPosition position = TypeAnnotationPosition 1713 .constructorInvocationTypeArg(readTypePath(), type_index); 1714 position.offset = offset; 1715 return position; 1716 } 1717 case METHOD_INVOCATION_TYPE_ARGUMENT: { 1718 final int offset = nextChar(); 1719 final int type_index = nextByte(); 1720 final TypeAnnotationPosition position = TypeAnnotationPosition 1721 .methodInvocationTypeArg(readTypePath(), type_index); 1722 position.offset = offset; 1723 return position; 1724 } 1725 case CONSTRUCTOR_REFERENCE_TYPE_ARGUMENT: { 1726 final int offset = nextChar(); 1727 final int type_index = nextByte(); 1728 final TypeAnnotationPosition position = TypeAnnotationPosition 1729 .constructorRefTypeArg(readTypePath(), type_index); 1730 position.offset = offset; 1731 return position; 1732 } 1733 case METHOD_REFERENCE_TYPE_ARGUMENT: { 1734 final int offset = nextChar(); 1735 final int type_index = nextByte(); 1736 final TypeAnnotationPosition position = TypeAnnotationPosition 1737 .methodRefTypeArg(readTypePath(), type_index); 1738 position.offset = offset; 1739 return position; 1740 } 1741 // We don't need to worry about these 1742 case METHOD_RETURN: 1743 return TypeAnnotationPosition.methodReturn(readTypePath()); 1744 case FIELD: 1745 return TypeAnnotationPosition.field(readTypePath()); 1746 case UNKNOWN: 1747 throw new AssertionError("jvm.ClassReader: UNKNOWN target type should never occur!"); 1748 default: 1749 throw new AssertionError("jvm.ClassReader: Unknown target type for position: " + type); 1750 } 1751 } 1752 1753 List<TypeAnnotationPosition.TypePathEntry> readTypePath() { 1754 int len = nextByte(); 1755 ListBuffer<Integer> loc = new ListBuffer<>(); 1756 for (int i = 0; i < len * TypeAnnotationPosition.TypePathEntry.bytesPerEntry; ++i) 1757 loc = loc.append(nextByte()); 1758 1759 return TypeAnnotationPosition.getTypePathFromBinary(loc.toList()); 1760 1761 } 1762 1763 Attribute readAttributeValue() { 1764 char c = (char) buf[bp++]; 1765 switch (c) { 1766 case 'B': 1767 return new Attribute.Constant(syms.byteType, readPool(nextChar())); 1768 case 'C': 1769 return new Attribute.Constant(syms.charType, readPool(nextChar())); 1770 case 'D': 1771 return new Attribute.Constant(syms.doubleType, readPool(nextChar())); 1772 case 'F': 1773 return new Attribute.Constant(syms.floatType, readPool(nextChar())); 1774 case 'I': 1775 return new Attribute.Constant(syms.intType, readPool(nextChar())); 1776 case 'J': 1777 return new Attribute.Constant(syms.longType, readPool(nextChar())); 1778 case 'S': 1779 return new Attribute.Constant(syms.shortType, readPool(nextChar())); 1780 case 'Z': 1781 return new Attribute.Constant(syms.booleanType, readPool(nextChar())); 1782 case 's': 1783 return new Attribute.Constant(syms.stringType, readPool(nextChar()).toString()); 1784 case 'e': 1785 return new EnumAttributeProxy(readEnumType(nextChar()), readName(nextChar())); 1786 case 'c': 1787 return new Attribute.Class(types, readTypeOrClassSymbol(nextChar())); 1788 case '[': { 1789 int n = nextChar(); 1790 ListBuffer<Attribute> l = new ListBuffer<>(); 1791 for (int i=0; i<n; i++) 1792 l.append(readAttributeValue()); 1793 return new ArrayAttributeProxy(l.toList()); 1794 } 1795 case '@': 1796 return readCompoundAnnotation(); 1797 default: 1798 throw new AssertionError("unknown annotation tag '" + c + "'"); 1799 } 1800 } 1801 1802 interface ProxyVisitor extends Attribute.Visitor { 1803 void visitEnumAttributeProxy(EnumAttributeProxy proxy); 1804 void visitArrayAttributeProxy(ArrayAttributeProxy proxy); 1805 void visitCompoundAnnotationProxy(CompoundAnnotationProxy proxy); 1806 } 1807 1808 static class EnumAttributeProxy extends Attribute { 1809 Type enumType; 1810 Name enumerator; 1811 public EnumAttributeProxy(Type enumType, Name enumerator) { 1812 super(null); 1813 this.enumType = enumType; 1814 this.enumerator = enumerator; 1815 } 1816 public void accept(Visitor v) { ((ProxyVisitor)v).visitEnumAttributeProxy(this); } 1817 @Override @DefinedBy(Api.LANGUAGE_MODEL) 1818 public String toString() { 1819 return "/*proxy enum*/" + enumType + "." + enumerator; 1820 } 1821 } 1822 1823 static class ArrayAttributeProxy extends Attribute { 1824 List<Attribute> values; 1825 ArrayAttributeProxy(List<Attribute> values) { 1826 super(null); 1827 this.values = values; 1828 } 1829 public void accept(Visitor v) { ((ProxyVisitor)v).visitArrayAttributeProxy(this); } 1830 @Override @DefinedBy(Api.LANGUAGE_MODEL) 1831 public String toString() { 1832 return "{" + values + "}"; 1833 } 1834 } 1835 1836 /** A temporary proxy representing a compound attribute. 1837 */ 1838 static class CompoundAnnotationProxy extends Attribute { 1839 final List<Pair<Name,Attribute>> values; 1840 public CompoundAnnotationProxy(Type type, 1841 List<Pair<Name,Attribute>> values) { 1842 super(type); 1843 this.values = values; 1844 } 1845 public void accept(Visitor v) { ((ProxyVisitor)v).visitCompoundAnnotationProxy(this); } 1846 @Override @DefinedBy(Api.LANGUAGE_MODEL) 1847 public String toString() { 1848 StringBuilder buf = new StringBuilder(); 1849 buf.append("@"); 1850 buf.append(type.tsym.getQualifiedName()); 1851 buf.append("/*proxy*/{"); 1852 boolean first = true; 1853 for (List<Pair<Name,Attribute>> v = values; 1854 v.nonEmpty(); v = v.tail) { 1855 Pair<Name,Attribute> value = v.head; 1856 if (!first) buf.append(","); 1857 first = false; 1858 buf.append(value.fst); 1859 buf.append("="); 1860 buf.append(value.snd); 1861 } 1862 buf.append("}"); 1863 return buf.toString(); 1864 } 1865 } 1866 1867 /** A temporary proxy representing a type annotation. 1868 */ 1869 static class TypeAnnotationProxy { 1870 final CompoundAnnotationProxy compound; 1871 final TypeAnnotationPosition position; 1872 public TypeAnnotationProxy(CompoundAnnotationProxy compound, 1873 TypeAnnotationPosition position) { 1874 this.compound = compound; 1875 this.position = position; 1876 } 1877 } 1878 1879 class AnnotationDeproxy implements ProxyVisitor { 1880 private ClassSymbol requestingOwner; 1881 1882 AnnotationDeproxy(ClassSymbol owner) { 1883 this.requestingOwner = owner; 1884 } 1885 1886 List<Attribute.Compound> deproxyCompoundList(List<CompoundAnnotationProxy> pl) { 1887 // also must fill in types!!!! 1888 ListBuffer<Attribute.Compound> buf = new ListBuffer<>(); 1889 for (List<CompoundAnnotationProxy> l = pl; l.nonEmpty(); l=l.tail) { 1890 buf.append(deproxyCompound(l.head)); 1891 } 1892 return buf.toList(); 1893 } 1894 1895 Attribute.Compound deproxyCompound(CompoundAnnotationProxy a) { 1896 ListBuffer<Pair<Symbol.MethodSymbol,Attribute>> buf = new ListBuffer<>(); 1897 for (List<Pair<Name,Attribute>> l = a.values; 1898 l.nonEmpty(); 1899 l = l.tail) { 1900 MethodSymbol meth = findAccessMethod(a.type, l.head.fst); 1901 buf.append(new Pair<>(meth, deproxy(meth.type.getReturnType(), l.head.snd))); 1902 } 1903 return new Attribute.Compound(a.type, buf.toList()); 1904 } 1905 1906 MethodSymbol findAccessMethod(Type container, Name name) { 1907 CompletionFailure failure = null; 1908 try { 1909 for (Symbol sym : container.tsym.members().getSymbolsByName(name)) { 1910 if (sym.kind == MTH && sym.type.getParameterTypes().length() == 0) 1911 return (MethodSymbol) sym; 1912 } 1913 } catch (CompletionFailure ex) { 1914 failure = ex; 1915 } 1916 // The method wasn't found: emit a warning and recover 1917 JavaFileObject prevSource = log.useSource(requestingOwner.classfile); 1918 try { 1919 if (lintClassfile) { 1920 if (failure == null) { 1921 log.warning("annotation.method.not.found", 1922 container, 1923 name); 1924 } else { 1925 log.warning("annotation.method.not.found.reason", 1926 container, 1927 name, 1928 failure.getDetailValue());//diagnostic, if present 1929 } 1930 } 1931 } finally { 1932 log.useSource(prevSource); 1933 } 1934 // Construct a new method type and symbol. Use bottom 1935 // type (typeof null) as return type because this type is 1936 // a subtype of all reference types and can be converted 1937 // to primitive types by unboxing. 1938 MethodType mt = new MethodType(List.<Type>nil(), 1939 syms.botType, 1940 List.<Type>nil(), 1941 syms.methodClass); 1942 return new MethodSymbol(PUBLIC | ABSTRACT, name, mt, container.tsym); 1943 } 1944 1945 Attribute result; 1946 Type type; 1947 Attribute deproxy(Type t, Attribute a) { 1948 Type oldType = type; 1949 try { 1950 type = t; 1951 a.accept(this); 1952 return result; 1953 } finally { 1954 type = oldType; 1955 } 1956 } 1957 1958 // implement Attribute.Visitor below 1959 1960 public void visitConstant(Attribute.Constant value) { 1961 // assert value.type == type; 1962 result = value; 1963 } 1964 1965 public void visitClass(Attribute.Class clazz) { 1966 result = clazz; 1967 } 1968 1969 public void visitEnum(Attribute.Enum e) { 1970 throw new AssertionError(); // shouldn't happen 1971 } 1972 1973 public void visitCompound(Attribute.Compound compound) { 1974 throw new AssertionError(); // shouldn't happen 1975 } 1976 1977 public void visitArray(Attribute.Array array) { 1978 throw new AssertionError(); // shouldn't happen 1979 } 1980 1981 public void visitError(Attribute.Error e) { 1982 throw new AssertionError(); // shouldn't happen 1983 } 1984 1985 public void visitEnumAttributeProxy(EnumAttributeProxy proxy) { 1986 // type.tsym.flatName() should == proxy.enumFlatName 1987 TypeSymbol enumTypeSym = proxy.enumType.tsym; 1988 VarSymbol enumerator = null; 1989 CompletionFailure failure = null; 1990 try { 1991 for (Symbol sym : enumTypeSym.members().getSymbolsByName(proxy.enumerator)) { 1992 if (sym.kind == VAR) { 1993 enumerator = (VarSymbol)sym; 1994 break; 1995 } 1996 } 1997 } 1998 catch (CompletionFailure ex) { 1999 failure = ex; 2000 } 2001 if (enumerator == null) { 2002 if (failure != null) { 2003 log.warning("unknown.enum.constant.reason", 2004 currentClassFile, enumTypeSym, proxy.enumerator, 2005 failure.getDiagnostic()); 2006 } else { 2007 log.warning("unknown.enum.constant", 2008 currentClassFile, enumTypeSym, proxy.enumerator); 2009 } 2010 result = new Attribute.Enum(enumTypeSym.type, 2011 new VarSymbol(0, proxy.enumerator, syms.botType, enumTypeSym)); 2012 } else { 2013 result = new Attribute.Enum(enumTypeSym.type, enumerator); 2014 } 2015 } 2016 2017 public void visitArrayAttributeProxy(ArrayAttributeProxy proxy) { 2018 int length = proxy.values.length(); 2019 Attribute[] ats = new Attribute[length]; 2020 Type elemtype = types.elemtype(type); 2021 int i = 0; 2022 for (List<Attribute> p = proxy.values; p.nonEmpty(); p = p.tail) { 2023 ats[i++] = deproxy(elemtype, p.head); 2024 } 2025 result = new Attribute.Array(type, ats); 2026 } 2027 2028 public void visitCompoundAnnotationProxy(CompoundAnnotationProxy proxy) { 2029 result = deproxyCompound(proxy); 2030 } 2031 } 2032 2033 class AnnotationDefaultCompleter extends AnnotationDeproxy implements Runnable { 2034 final MethodSymbol sym; 2035 final Attribute value; 2036 final JavaFileObject classFile = currentClassFile; 2037 2038 AnnotationDefaultCompleter(MethodSymbol sym, Attribute value) { 2039 super(currentOwner.kind == MTH 2040 ? currentOwner.enclClass() : (ClassSymbol)currentOwner); 2041 this.sym = sym; 2042 this.value = value; 2043 } 2044 2045 @Override 2046 public void run() { 2047 JavaFileObject previousClassFile = currentClassFile; 2048 try { 2049 // Reset the interim value set earlier in 2050 // attachAnnotationDefault(). 2051 sym.defaultValue = null; 2052 currentClassFile = classFile; 2053 sym.defaultValue = deproxy(sym.type.getReturnType(), value); 2054 } finally { 2055 currentClassFile = previousClassFile; 2056 } 2057 } 2058 2059 @Override 2060 public String toString() { 2061 return " ClassReader store default for " + sym.owner + "." + sym + " is " + value; 2062 } 2063 } 2064 2065 class AnnotationCompleter extends AnnotationDeproxy implements Runnable { 2066 final Symbol sym; 2067 final List<CompoundAnnotationProxy> l; 2068 final JavaFileObject classFile; 2069 2070 AnnotationCompleter(Symbol sym, List<CompoundAnnotationProxy> l) { 2071 super(currentOwner.kind == MTH 2072 ? currentOwner.enclClass() : (ClassSymbol)currentOwner); 2073 this.sym = sym; 2074 this.l = l; 2075 this.classFile = currentClassFile; 2076 } 2077 2078 @Override 2079 public void run() { 2080 JavaFileObject previousClassFile = currentClassFile; 2081 try { 2082 currentClassFile = classFile; 2083 List<Attribute.Compound> newList = deproxyCompoundList(l); 2084 if (sym.annotationsPendingCompletion()) { 2085 sym.setDeclarationAttributes(newList); 2086 } else { 2087 sym.appendAttributes(newList); 2088 } 2089 } finally { 2090 currentClassFile = previousClassFile; 2091 } 2092 } 2093 2094 @Override 2095 public String toString() { 2096 return " ClassReader annotate " + sym.owner + "." + sym + " with " + l; 2097 } 2098 } 2099 2100 class TypeAnnotationCompleter extends AnnotationCompleter { 2101 2102 List<TypeAnnotationProxy> proxies; 2103 2104 TypeAnnotationCompleter(Symbol sym, 2105 List<TypeAnnotationProxy> proxies) { 2106 super(sym, List.<CompoundAnnotationProxy>nil()); 2107 this.proxies = proxies; 2108 } 2109 2110 List<Attribute.TypeCompound> deproxyTypeCompoundList(List<TypeAnnotationProxy> proxies) { 2111 ListBuffer<Attribute.TypeCompound> buf = new ListBuffer<>(); 2112 for (TypeAnnotationProxy proxy: proxies) { 2113 Attribute.Compound compound = deproxyCompound(proxy.compound); 2114 Attribute.TypeCompound typeCompound = new Attribute.TypeCompound(compound, proxy.position); 2115 buf.add(typeCompound); 2116 } 2117 return buf.toList(); 2118 } 2119 2120 @Override 2121 public void run() { 2122 JavaFileObject previousClassFile = currentClassFile; 2123 try { 2124 currentClassFile = classFile; 2125 List<Attribute.TypeCompound> newList = deproxyTypeCompoundList(proxies); 2126 sym.setTypeAttributes(newList.prependList(sym.getRawTypeAttributes())); 2127 } finally { 2128 currentClassFile = previousClassFile; 2129 } 2130 } 2131 } 2132 2133 2134/************************************************************************ 2135 * Reading Symbols 2136 ***********************************************************************/ 2137 2138 /** Read a field. 2139 */ 2140 VarSymbol readField() { 2141 long flags = adjustFieldFlags(nextChar()); 2142 Name name = readName(nextChar()); 2143 Type type = readType(nextChar()); 2144 VarSymbol v = new VarSymbol(flags, name, type, currentOwner); 2145 readMemberAttrs(v); 2146 return v; 2147 } 2148 2149 /** Read a method. 2150 */ 2151 MethodSymbol readMethod() { 2152 long flags = adjustMethodFlags(nextChar()); 2153 Name name = readName(nextChar()); 2154 Type type = readType(nextChar()); 2155 if (currentOwner.isInterface() && 2156 (flags & ABSTRACT) == 0 && !name.equals(names.clinit)) { 2157 if (majorVersion > Version.V52.major || 2158 (majorVersion == Version.V52.major && minorVersion >= Version.V52.minor)) { 2159 if ((flags & STATIC) == 0) { 2160 currentOwner.flags_field |= DEFAULT; 2161 flags |= DEFAULT | ABSTRACT; 2162 } 2163 } else { 2164 //protect against ill-formed classfiles 2165 throw badClassFile((flags & STATIC) == 0 ? "invalid.default.interface" : "invalid.static.interface", 2166 Integer.toString(majorVersion), 2167 Integer.toString(minorVersion)); 2168 } 2169 } 2170 if (name == names.init && currentOwner.hasOuterInstance()) { 2171 // Sometimes anonymous classes don't have an outer 2172 // instance, however, there is no reliable way to tell so 2173 // we never strip this$n 2174 if (!currentOwner.name.isEmpty()) 2175 type = new MethodType(adjustMethodParams(flags, type.getParameterTypes()), 2176 type.getReturnType(), 2177 type.getThrownTypes(), 2178 syms.methodClass); 2179 } 2180 MethodSymbol m = new MethodSymbol(flags, name, type, currentOwner); 2181 if (types.isSignaturePolymorphic(m)) { 2182 m.flags_field |= SIGNATURE_POLYMORPHIC; 2183 } 2184 if (saveParameterNames) 2185 initParameterNames(m); 2186 Symbol prevOwner = currentOwner; 2187 currentOwner = m; 2188 try { 2189 readMemberAttrs(m); 2190 } finally { 2191 currentOwner = prevOwner; 2192 } 2193 if (saveParameterNames) 2194 setParameterNames(m, type); 2195 2196 if ((flags & VARARGS) != 0) { 2197 final Type last = type.getParameterTypes().last(); 2198 if (last == null || !last.hasTag(ARRAY)) { 2199 m.flags_field &= ~VARARGS; 2200 throw badClassFile("malformed.vararg.method", m); 2201 } 2202 } 2203 2204 return m; 2205 } 2206 2207 private List<Type> adjustMethodParams(long flags, List<Type> args) { 2208 boolean isVarargs = (flags & VARARGS) != 0; 2209 if (isVarargs) { 2210 Type varargsElem = args.last(); 2211 ListBuffer<Type> adjustedArgs = new ListBuffer<>(); 2212 for (Type t : args) { 2213 adjustedArgs.append(t != varargsElem ? 2214 t : 2215 ((ArrayType)t).makeVarargs()); 2216 } 2217 args = adjustedArgs.toList(); 2218 } 2219 return args.tail; 2220 } 2221 2222 /** 2223 * Init the parameter names array. 2224 * Parameter names are currently inferred from the names in the 2225 * LocalVariableTable attributes of a Code attribute. 2226 * (Note: this means parameter names are currently not available for 2227 * methods without a Code attribute.) 2228 * This method initializes an array in which to store the name indexes 2229 * of parameter names found in LocalVariableTable attributes. It is 2230 * slightly supersized to allow for additional slots with a start_pc of 0. 2231 */ 2232 void initParameterNames(MethodSymbol sym) { 2233 // make allowance for synthetic parameters. 2234 final int excessSlots = 4; 2235 int expectedParameterSlots = 2236 Code.width(sym.type.getParameterTypes()) + excessSlots; 2237 if (parameterNameIndices == null 2238 || parameterNameIndices.length < expectedParameterSlots) { 2239 parameterNameIndices = new int[expectedParameterSlots]; 2240 } else 2241 Arrays.fill(parameterNameIndices, 0); 2242 haveParameterNameIndices = false; 2243 sawMethodParameters = false; 2244 } 2245 2246 /** 2247 * Set the parameter names for a symbol from the name index in the 2248 * parameterNameIndicies array. The type of the symbol may have changed 2249 * while reading the method attributes (see the Signature attribute). 2250 * This may be because of generic information or because anonymous 2251 * synthetic parameters were added. The original type (as read from 2252 * the method descriptor) is used to help guess the existence of 2253 * anonymous synthetic parameters. 2254 * On completion, sym.savedParameter names will either be null (if 2255 * no parameter names were found in the class file) or will be set to a 2256 * list of names, one per entry in sym.type.getParameterTypes, with 2257 * any missing names represented by the empty name. 2258 */ 2259 void setParameterNames(MethodSymbol sym, Type jvmType) { 2260 // if no names were found in the class file, there's nothing more to do 2261 if (!haveParameterNameIndices) 2262 return; 2263 // If we get parameter names from MethodParameters, then we 2264 // don't need to skip. 2265 int firstParam = 0; 2266 if (!sawMethodParameters) { 2267 firstParam = ((sym.flags() & STATIC) == 0) ? 1 : 0; 2268 // the code in readMethod may have skipped the first 2269 // parameter when setting up the MethodType. If so, we 2270 // make a corresponding allowance here for the position of 2271 // the first parameter. Note that this assumes the 2272 // skipped parameter has a width of 1 -- i.e. it is not 2273 // a double width type (long or double.) 2274 if (sym.name == names.init && currentOwner.hasOuterInstance()) { 2275 // Sometimes anonymous classes don't have an outer 2276 // instance, however, there is no reliable way to tell so 2277 // we never strip this$n 2278 if (!currentOwner.name.isEmpty()) 2279 firstParam += 1; 2280 } 2281 2282 if (sym.type != jvmType) { 2283 // reading the method attributes has caused the 2284 // symbol's type to be changed. (i.e. the Signature 2285 // attribute.) This may happen if there are hidden 2286 // (synthetic) parameters in the descriptor, but not 2287 // in the Signature. The position of these hidden 2288 // parameters is unspecified; for now, assume they are 2289 // at the beginning, and so skip over them. The 2290 // primary case for this is two hidden parameters 2291 // passed into Enum constructors. 2292 int skip = Code.width(jvmType.getParameterTypes()) 2293 - Code.width(sym.type.getParameterTypes()); 2294 firstParam += skip; 2295 } 2296 } 2297 List<Name> paramNames = List.nil(); 2298 int index = firstParam; 2299 for (Type t: sym.type.getParameterTypes()) { 2300 int nameIdx = (index < parameterNameIndices.length 2301 ? parameterNameIndices[index] : 0); 2302 Name name = nameIdx == 0 ? names.empty : readName(nameIdx); 2303 paramNames = paramNames.prepend(name); 2304 index += Code.width(t); 2305 } 2306 sym.savedParameterNames = paramNames.reverse(); 2307 } 2308 2309 /** 2310 * skip n bytes 2311 */ 2312 void skipBytes(int n) { 2313 bp = bp + n; 2314 } 2315 2316 /** Skip a field or method 2317 */ 2318 void skipMember() { 2319 bp = bp + 6; 2320 char ac = nextChar(); 2321 for (int i = 0; i < ac; i++) { 2322 bp = bp + 2; 2323 int attrLen = nextInt(); 2324 bp = bp + attrLen; 2325 } 2326 } 2327 2328 void skipInnerClasses() { 2329 int n = nextChar(); 2330 for (int i = 0; i < n; i++) { 2331 nextChar(); 2332 nextChar(); 2333 nextChar(); 2334 nextChar(); 2335 } 2336 } 2337 2338 /** Enter type variables of this classtype and all enclosing ones in 2339 * `typevars'. 2340 */ 2341 protected void enterTypevars(Type t) { 2342 if (t.getEnclosingType() != null && t.getEnclosingType().hasTag(CLASS)) 2343 enterTypevars(t.getEnclosingType()); 2344 for (List<Type> xs = t.getTypeArguments(); xs.nonEmpty(); xs = xs.tail) 2345 typevars.enter(xs.head.tsym); 2346 } 2347 2348 protected void enterTypevars(Symbol sym) { 2349 if (sym.owner.kind == MTH) { 2350 enterTypevars(sym.owner); 2351 enterTypevars(sym.owner.owner); 2352 } 2353 enterTypevars(sym.type); 2354 } 2355 2356 protected ClassSymbol enterClass(Name name) { 2357 return syms.enterClass(currentModule, name); 2358 } 2359 2360 protected ClassSymbol enterClass(Name name, TypeSymbol owner) { 2361 return syms.enterClass(currentModule, name, owner); 2362 } 2363 2364 /** Read contents of a given class symbol `c'. Both external and internal 2365 * versions of an inner class are read. 2366 */ 2367 void readClass(ClassSymbol c) { 2368 ClassType ct = (ClassType)c.type; 2369 2370 // allocate scope for members 2371 c.members_field = WriteableScope.create(c); 2372 2373 // prepare type variable table 2374 typevars = typevars.dup(currentOwner); 2375 if (ct.getEnclosingType().hasTag(CLASS)) 2376 enterTypevars(ct.getEnclosingType()); 2377 2378 // read flags, or skip if this is an inner class 2379 long f = nextChar(); 2380 long flags = adjustClassFlags(f); 2381 if ((flags & MODULE) == 0) { 2382 if (c.owner.kind == PCK) c.flags_field = flags; 2383 // read own class name and check that it matches 2384 currentModule = c.packge().modle; 2385 ClassSymbol self = readClassSymbol(nextChar()); 2386 if (c != self) { 2387 throw badClassFile("class.file.wrong.class", 2388 self.flatname); 2389 } 2390 } else { 2391 c.flags_field = flags; 2392 Name modInfoName = readModuleInfoName(nextChar()); 2393 if (c.owner.name == null) { 2394 syms.enterModule((ModuleSymbol) c.owner, Convert.packagePart(modInfoName)); 2395 } else { 2396 // TODO: validate name 2397 } 2398 currentModule = (ModuleSymbol) c.owner; 2399 } 2400 2401 // class attributes must be read before class 2402 // skip ahead to read class attributes 2403 int startbp = bp; 2404 nextChar(); 2405 char interfaceCount = nextChar(); 2406 bp += interfaceCount * 2; 2407 char fieldCount = nextChar(); 2408 for (int i = 0; i < fieldCount; i++) skipMember(); 2409 char methodCount = nextChar(); 2410 for (int i = 0; i < methodCount; i++) skipMember(); 2411 readClassAttrs(c); 2412 2413 if (readAllOfClassFile) { 2414 for (int i = 1; i < poolObj.length; i++) readPool(i); 2415 c.pool = new Pool(poolObj.length, poolObj, types); 2416 } 2417 2418 // reset and read rest of classinfo 2419 bp = startbp; 2420 int n = nextChar(); 2421 if ((flags & MODULE) != 0 && n > 0) { 2422 throw badClassFile("module.info.invalid.super.class"); 2423 } 2424 if (ct.supertype_field == null) 2425 ct.supertype_field = (n == 0) 2426 ? Type.noType 2427 : readClassSymbol(n).erasure(types); 2428 n = nextChar(); 2429 List<Type> is = List.nil(); 2430 for (int i = 0; i < n; i++) { 2431 Type _inter = readClassSymbol(nextChar()).erasure(types); 2432 is = is.prepend(_inter); 2433 } 2434 if (ct.interfaces_field == null) 2435 ct.interfaces_field = is.reverse(); 2436 2437 Assert.check(fieldCount == nextChar()); 2438 for (int i = 0; i < fieldCount; i++) enterMember(c, readField()); 2439 Assert.check(methodCount == nextChar()); 2440 for (int i = 0; i < methodCount; i++) enterMember(c, readMethod()); 2441 2442 typevars = typevars.leave(); 2443 } 2444 2445 /** Read inner class info. For each inner/outer pair allocate a 2446 * member class. 2447 */ 2448 void readInnerClasses(ClassSymbol c) { 2449 int n = nextChar(); 2450 for (int i = 0; i < n; i++) { 2451 nextChar(); // skip inner class symbol 2452 ClassSymbol outer = readClassSymbol(nextChar()); 2453 Name name = readName(nextChar()); 2454 if (name == null) name = names.empty; 2455 long flags = adjustClassFlags(nextChar()); 2456 if (outer != null) { // we have a member class 2457 if (name == names.empty) 2458 name = names.one; 2459 ClassSymbol member = enterClass(name, outer); 2460 if ((flags & STATIC) == 0) { 2461 ((ClassType)member.type).setEnclosingType(outer.type); 2462 if (member.erasure_field != null) 2463 ((ClassType)member.erasure_field).setEnclosingType(types.erasure(outer.type)); 2464 } 2465 if (c == outer) { 2466 member.flags_field = flags; 2467 enterMember(c, member); 2468 } 2469 } 2470 } 2471 } 2472 2473 /** Read a class definition from the bytes in buf. 2474 */ 2475 private void readClassBuffer(ClassSymbol c) throws IOException { 2476 int magic = nextInt(); 2477 if (magic != JAVA_MAGIC) 2478 throw badClassFile("illegal.start.of.class.file"); 2479 2480 minorVersion = nextChar(); 2481 majorVersion = nextChar(); 2482 int maxMajor = Version.MAX().major; 2483 int maxMinor = Version.MAX().minor; 2484 if (majorVersion > maxMajor || 2485 majorVersion * 1000 + minorVersion < 2486 Version.MIN().major * 1000 + Version.MIN().minor) { 2487 if (majorVersion == (maxMajor + 1)) 2488 log.warning("big.major.version", 2489 currentClassFile, 2490 majorVersion, 2491 maxMajor); 2492 else 2493 throw badClassFile("wrong.version", 2494 Integer.toString(majorVersion), 2495 Integer.toString(minorVersion), 2496 Integer.toString(maxMajor), 2497 Integer.toString(maxMinor)); 2498 } 2499 2500 indexPool(); 2501 if (signatureBuffer.length < bp) { 2502 int ns = Integer.highestOneBit(bp) << 1; 2503 signatureBuffer = new byte[ns]; 2504 } 2505 readClass(c); 2506 } 2507 2508 public void readClassFile(ClassSymbol c) { 2509 currentOwner = c; 2510 currentClassFile = c.classfile; 2511 warnedAttrs.clear(); 2512 filling = true; 2513 target = null; 2514 repeatable = null; 2515 try { 2516 bp = 0; 2517 buf = readInputStream(buf, c.classfile.openInputStream()); 2518 readClassBuffer(c); 2519 if (!missingTypeVariables.isEmpty() && !foundTypeVariables.isEmpty()) { 2520 List<Type> missing = missingTypeVariables; 2521 List<Type> found = foundTypeVariables; 2522 missingTypeVariables = List.nil(); 2523 foundTypeVariables = List.nil(); 2524 filling = false; 2525 ClassType ct = (ClassType)currentOwner.type; 2526 ct.supertype_field = 2527 types.subst(ct.supertype_field, missing, found); 2528 ct.interfaces_field = 2529 types.subst(ct.interfaces_field, missing, found); 2530 } else if (missingTypeVariables.isEmpty() != 2531 foundTypeVariables.isEmpty()) { 2532 Name name = missingTypeVariables.head.tsym.name; 2533 throw badClassFile("undecl.type.var", name); 2534 } 2535 2536 if ((c.flags_field & Flags.ANNOTATION) != 0) { 2537 c.setAnnotationTypeMetadata(new AnnotationTypeMetadata(c, new CompleterDeproxy(c, target, repeatable))); 2538 } else { 2539 c.setAnnotationTypeMetadata(AnnotationTypeMetadata.notAnAnnotationType()); 2540 } 2541 2542 if (c == currentModule.module_info) { 2543 if (interimUses.nonEmpty() || interimProvides.nonEmpty()) { 2544 Assert.check(currentModule.isCompleted()); 2545 currentModule.usesProvidesCompleter = 2546 new UsesProvidesCompleter(currentModule, interimUses, interimProvides); 2547 } else { 2548 currentModule.uses = List.nil(); 2549 currentModule.provides = List.nil(); 2550 } 2551 } 2552 } catch (IOException ex) { 2553 throw badClassFile("unable.to.access.file", ex.getMessage()); 2554 } catch (ArrayIndexOutOfBoundsException ex) { 2555 throw badClassFile("bad.class.file", c.flatname); 2556 } finally { 2557 interimUses = List.nil(); 2558 interimProvides = List.nil(); 2559 missingTypeVariables = List.nil(); 2560 foundTypeVariables = List.nil(); 2561 filling = false; 2562 } 2563 } 2564 // where 2565 private static byte[] readInputStream(byte[] buf, InputStream s) throws IOException { 2566 try { 2567 buf = ensureCapacity(buf, s.available()); 2568 int r = s.read(buf); 2569 int bp = 0; 2570 while (r != -1) { 2571 bp += r; 2572 buf = ensureCapacity(buf, bp); 2573 r = s.read(buf, bp, buf.length - bp); 2574 } 2575 return buf; 2576 } finally { 2577 try { 2578 s.close(); 2579 } catch (IOException e) { 2580 /* Ignore any errors, as this stream may have already 2581 * thrown a related exception which is the one that 2582 * should be reported. 2583 */ 2584 } 2585 } 2586 } 2587 /* 2588 * ensureCapacity will increase the buffer as needed, taking note that 2589 * the new buffer will always be greater than the needed and never 2590 * exactly equal to the needed size or bp. If equal then the read (above) 2591 * will infinitely loop as buf.length - bp == 0. 2592 */ 2593 private static byte[] ensureCapacity(byte[] buf, int needed) { 2594 if (buf.length <= needed) { 2595 byte[] old = buf; 2596 buf = new byte[Integer.highestOneBit(needed) << 1]; 2597 System.arraycopy(old, 0, buf, 0, old.length); 2598 } 2599 return buf; 2600 } 2601 2602 /** We can only read a single class file at a time; this 2603 * flag keeps track of when we are currently reading a class 2604 * file. 2605 */ 2606 public boolean filling = false; 2607 2608/************************************************************************ 2609 * Adjusting flags 2610 ***********************************************************************/ 2611 2612 long adjustFieldFlags(long flags) { 2613 return flags; 2614 } 2615 2616 long adjustMethodFlags(long flags) { 2617 if ((flags & ACC_BRIDGE) != 0) { 2618 flags &= ~ACC_BRIDGE; 2619 flags |= BRIDGE; 2620 } 2621 if ((flags & ACC_VARARGS) != 0) { 2622 flags &= ~ACC_VARARGS; 2623 flags |= VARARGS; 2624 } 2625 return flags; 2626 } 2627 2628 long adjustClassFlags(long flags) { 2629 if ((flags & ACC_MODULE) != 0) { 2630 flags &= ~ACC_MODULE; 2631 flags |= MODULE; 2632 } 2633 return flags & ~ACC_SUPER; // SUPER and SYNCHRONIZED bits overloaded 2634 } 2635 2636 /** 2637 * A subclass of JavaFileObject for the sourcefile attribute found in a classfile. 2638 * The attribute is only the last component of the original filename, so is unlikely 2639 * to be valid as is, so operations other than those to access the name throw 2640 * UnsupportedOperationException 2641 */ 2642 private static class SourceFileObject implements JavaFileObject { 2643 2644 /** The file's name. 2645 */ 2646 private final Name name; 2647 private final Name flatname; 2648 2649 public SourceFileObject(Name name, Name flatname) { 2650 this.name = name; 2651 this.flatname = flatname; 2652 } 2653 2654 @Override @DefinedBy(Api.COMPILER) 2655 public URI toUri() { 2656 try { 2657 return new URI(null, name.toString(), null); 2658 } catch (URISyntaxException e) { 2659 throw new PathFileObject.CannotCreateUriError(name.toString(), e); 2660 } 2661 } 2662 2663 @Override @DefinedBy(Api.COMPILER) 2664 public String getName() { 2665 return name.toString(); 2666 } 2667 2668 @Override @DefinedBy(Api.COMPILER) 2669 public JavaFileObject.Kind getKind() { 2670 return BaseFileManager.getKind(getName()); 2671 } 2672 2673 @Override @DefinedBy(Api.COMPILER) 2674 public InputStream openInputStream() { 2675 throw new UnsupportedOperationException(); 2676 } 2677 2678 @Override @DefinedBy(Api.COMPILER) 2679 public OutputStream openOutputStream() { 2680 throw new UnsupportedOperationException(); 2681 } 2682 2683 @Override @DefinedBy(Api.COMPILER) 2684 public CharBuffer getCharContent(boolean ignoreEncodingErrors) { 2685 throw new UnsupportedOperationException(); 2686 } 2687 2688 @Override @DefinedBy(Api.COMPILER) 2689 public Reader openReader(boolean ignoreEncodingErrors) { 2690 throw new UnsupportedOperationException(); 2691 } 2692 2693 @Override @DefinedBy(Api.COMPILER) 2694 public Writer openWriter() { 2695 throw new UnsupportedOperationException(); 2696 } 2697 2698 @Override @DefinedBy(Api.COMPILER) 2699 public long getLastModified() { 2700 throw new UnsupportedOperationException(); 2701 } 2702 2703 @Override @DefinedBy(Api.COMPILER) 2704 public boolean delete() { 2705 throw new UnsupportedOperationException(); 2706 } 2707 2708 @Override @DefinedBy(Api.COMPILER) 2709 public boolean isNameCompatible(String simpleName, JavaFileObject.Kind kind) { 2710 return true; // fail-safe mode 2711 } 2712 2713 @Override @DefinedBy(Api.COMPILER) 2714 public NestingKind getNestingKind() { 2715 return null; 2716 } 2717 2718 @Override @DefinedBy(Api.COMPILER) 2719 public Modifier getAccessLevel() { 2720 return null; 2721 } 2722 2723 /** 2724 * Check if two file objects are equal. 2725 * SourceFileObjects are just placeholder objects for the value of a 2726 * SourceFile attribute, and do not directly represent specific files. 2727 * Two SourceFileObjects are equal if their names are equal. 2728 */ 2729 @Override 2730 public boolean equals(Object other) { 2731 if (this == other) 2732 return true; 2733 2734 if (!(other instanceof SourceFileObject)) 2735 return false; 2736 2737 SourceFileObject o = (SourceFileObject) other; 2738 return name.equals(o.name); 2739 } 2740 2741 @Override 2742 public int hashCode() { 2743 return name.hashCode(); 2744 } 2745 } 2746 2747 private class CompleterDeproxy implements AnnotationTypeCompleter { 2748 ClassSymbol proxyOn; 2749 CompoundAnnotationProxy target; 2750 CompoundAnnotationProxy repeatable; 2751 2752 public CompleterDeproxy(ClassSymbol c, CompoundAnnotationProxy target, 2753 CompoundAnnotationProxy repeatable) 2754 { 2755 this.proxyOn = c; 2756 this.target = target; 2757 this.repeatable = repeatable; 2758 } 2759 2760 @Override 2761 public void complete(ClassSymbol sym) { 2762 Assert.check(proxyOn == sym); 2763 Attribute.Compound theTarget = null, theRepeatable = null; 2764 AnnotationDeproxy deproxy; 2765 2766 try { 2767 if (target != null) { 2768 deproxy = new AnnotationDeproxy(proxyOn); 2769 theTarget = deproxy.deproxyCompound(target); 2770 } 2771 2772 if (repeatable != null) { 2773 deproxy = new AnnotationDeproxy(proxyOn); 2774 theRepeatable = deproxy.deproxyCompound(repeatable); 2775 } 2776 } catch (Exception e) { 2777 throw new CompletionFailure(sym, e.getMessage()); 2778 } 2779 2780 sym.getAnnotationTypeMetadata().setTarget(theTarget); 2781 sym.getAnnotationTypeMetadata().setRepeatable(theRepeatable); 2782 } 2783 } 2784 2785 private static final class InterimUsesDirective { 2786 public final Name service; 2787 2788 public InterimUsesDirective(Name service) { 2789 this.service = service; 2790 } 2791 2792 } 2793 2794 private static final class InterimProvidesDirective { 2795 public final Name service; 2796 public final Name impl; 2797 2798 public InterimProvidesDirective(Name service, Name impl) { 2799 this.service = service; 2800 this.impl = impl; 2801 } 2802 2803 } 2804 2805 private final class UsesProvidesCompleter implements Completer { 2806 private final ModuleSymbol currentModule; 2807 private final List<InterimUsesDirective> interimUsesCopy; 2808 private final List<InterimProvidesDirective> interimProvidesCopy; 2809 2810 public UsesProvidesCompleter(ModuleSymbol currentModule, List<InterimUsesDirective> interimUsesCopy, List<InterimProvidesDirective> interimProvidesCopy) { 2811 this.currentModule = currentModule; 2812 this.interimUsesCopy = interimUsesCopy; 2813 this.interimProvidesCopy = interimProvidesCopy; 2814 } 2815 2816 @Override 2817 public void complete(Symbol sym) throws CompletionFailure { 2818 ListBuffer<Directive> directives = new ListBuffer<>(); 2819 directives.addAll(currentModule.directives); 2820 ListBuffer<UsesDirective> uses = new ListBuffer<>(); 2821 for (InterimUsesDirective interim : interimUsesCopy) { 2822 UsesDirective d = new UsesDirective(syms.enterClass(currentModule, interim.service)); 2823 uses.add(d); 2824 directives.add(d); 2825 } 2826 currentModule.uses = uses.toList(); 2827 ListBuffer<ProvidesDirective> provides = new ListBuffer<>(); 2828 for (InterimProvidesDirective interim : interimProvidesCopy) { 2829 ProvidesDirective d = new ProvidesDirective(syms.enterClass(currentModule, interim.service), 2830 syms.enterClass(currentModule, interim.impl)); 2831 provides.add(d); 2832 directives.add(d); 2833 } 2834 currentModule.provides = provides.toList(); 2835 currentModule.directives = directives.toList(); 2836 } 2837 } 2838} 2839