1 /* 2 * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package com.sun.tools.javac.jvm; 27 28 import java.io.*; 29 import java.net.URI; 30 import java.net.URISyntaxException; 31 import java.nio.CharBuffer; 32 import java.util.Arrays; 33 import java.util.EnumSet; 34 import java.util.HashMap; 35 import java.util.HashSet; 36 import java.util.Map; 37 import java.util.Set; 38 import javax.lang.model.SourceVersion; 39 import javax.tools.JavaFileObject; 40 import javax.tools.JavaFileManager; 41 import javax.tools.JavaFileManager.Location; 42 import javax.tools.StandardJavaFileManager; 43 44 import static javax.tools.StandardLocation.*; 45 46 import com.sun.tools.javac.comp.Annotate; 47 import com.sun.tools.javac.code.*; 48 import com.sun.tools.javac.code.Lint.LintCategory; 49 import com.sun.tools.javac.code.Type.*; 50 import com.sun.tools.javac.code.Symbol.*; 51 import com.sun.tools.javac.code.Symtab; 52 import com.sun.tools.javac.file.BaseFileObject; 53 import com.sun.tools.javac.util.*; 54 import com.sun.tools.javac.util.JCDiagnostic.DiagnosticPosition; 55 56 import static com.sun.tools.javac.code.Flags.*; 57 import static com.sun.tools.javac.code.Kinds.*; 58 import static com.sun.tools.javac.code.TypeTag.CLASS; 59 import static com.sun.tools.javac.jvm.ClassFile.*; 60 import static com.sun.tools.javac.jvm.ClassFile.Version.*; 61 62 import static com.sun.tools.javac.main.Option.*; 63 64 /** This class provides operations to read a classfile into an internal 65 * representation. The internal representation is anchored in a 66 * ClassSymbol which contains in its scope symbol representations 67 * for all other definitions in the classfile. Top-level Classes themselves 68 * appear as members of the scopes of PackageSymbols. 69 * 70 * <p><b>This is NOT part of any supported API. 71 * If you write code that depends on this, you do so at your own risk. 72 * This code and its internal interfaces are subject to change or 73 * deletion without notice.</b> 74 */ 75 public class ClassReader implements Completer { 76 /** The context key for the class reader. */ 77 protected static final Context.Key<ClassReader> classReaderKey = 78 new Context.Key<ClassReader>(); 79 80 public static final int INITIAL_BUFFER_SIZE = 0x0fff0; 81 82 Annotate annotate; 83 84 /** Switch: verbose output. 85 */ 86 boolean verbose; 87 88 /** Switch: check class file for correct minor version, unrecognized 89 * attributes. 90 */ 91 boolean checkClassFile; 92 93 /** Switch: read constant pool and code sections. This switch is initially 94 * set to false but can be turned on from outside. 95 */ 96 public boolean readAllOfClassFile = false; 97 98 /** Switch: read GJ signature information. 99 */ 100 boolean allowGenerics; 101 102 /** Switch: read varargs attribute. 103 */ 104 boolean allowVarargs; 105 106 /** Switch: allow annotations. 107 */ 108 boolean allowAnnotations; 109 110 /** Switch: allow simplified varargs. 111 */ 112 boolean allowSimplifiedVarargs; 113 114 /** Lint option: warn about classfile issues 115 */ 116 boolean lintClassfile; 117 118 /** Switch: allow default methods 119 */ 120 boolean allowDefaultMethods; 121 122 /** Switch: preserve parameter names from the variable table. 123 */ 124 public boolean saveParameterNames; 125 126 /** 127 * Switch: cache completion failures unless -XDdev is used 128 */ 129 private boolean cacheCompletionFailure; 130 131 /** 132 * Switch: prefer source files instead of newer when both source 133 * and class are available 134 **/ 135 public boolean preferSource; 136 137 /** The log to use for verbose output 138 */ 139 final Log log; 140 141 /** The symbol table. */ 142 Symtab syms; 143 144 Types types; 145 146 /** The name table. */ 147 final Names names; 148 149 /** Force a completion failure on this name 150 */ 151 final Name completionFailureName; 152 153 /** Access to files 154 */ 155 private final JavaFileManager fileManager; 156 157 /** Factory for diagnostics 158 */ 159 JCDiagnostic.Factory diagFactory; 160 161 /** Can be reassigned from outside: 162 * the completer to be used for ".java" files. If this remains unassigned 163 * ".java" files will not be loaded. 164 */ 165 public SourceCompleter sourceCompleter = null; 166 167 /** A hashtable containing the encountered top-level and member classes, 168 * indexed by flat names. The table does not contain local classes. 169 */ 170 private Map<Name,ClassSymbol> classes; 171 172 /** A hashtable containing the encountered packages. 173 */ 174 private Map<Name, PackageSymbol> packages; 175 176 /** The current scope where type variables are entered. 177 */ 178 protected Scope typevars; 179 180 /** The path name of the class file currently being read. 181 */ 182 protected JavaFileObject currentClassFile = null; 183 184 /** The class or method currently being read. 185 */ 186 protected Symbol currentOwner = null; 187 188 /** The buffer containing the currently read class file. 189 */ 190 byte[] buf = new byte[INITIAL_BUFFER_SIZE]; 191 192 /** The current input pointer. 193 */ 194 protected int bp; 195 196 /** The objects of the constant pool. 197 */ 198 Object[] poolObj; 199 200 /** For every constant pool entry, an index into buf where the 201 * defining section of the entry is found. 202 */ 203 int[] poolIdx; 204 205 /** The major version number of the class file being read. */ 206 int majorVersion; 207 /** The minor version number of the class file being read. */ 208 int minorVersion; 209 210 /** A table to hold the constant pool indices for method parameter 211 * names, as given in LocalVariableTable attributes. 212 */ 213 int[] parameterNameIndices; 214 215 /** 216 * Whether or not any parameter names have been found. 217 */ 218 boolean haveParameterNameIndices; 219 220 /** Set this to false every time we start reading a method 221 * and are saving parameter names. Set it to true when we see 222 * MethodParameters, if it's set when we see a LocalVariableTable, 223 * then we ignore the parameter names from the LVT. 224 */ 225 boolean sawMethodParameters; 226 227 /** 228 * The set of attribute names for which warnings have been generated for the current class 229 */ 230 Set<Name> warnedAttrs = new HashSet<Name>(); 231 232 /** Get the ClassReader instance for this invocation. */ 233 public static ClassReader instance(Context context) { 234 ClassReader instance = context.get(classReaderKey); 235 if (instance == null) 236 instance = new ClassReader(context, true); 237 return instance; 238 } 239 240 /** Initialize classes and packages, treating this as the definitive classreader. */ 241 public void init(Symtab syms) { 242 init(syms, true); 243 } 244 245 /** Initialize classes and packages, optionally treating this as 246 * the definitive classreader. 247 */ 248 private void init(Symtab syms, boolean definitive) { 249 if (classes != null) return; 250 251 if (definitive) { 252 Assert.check(packages == null || packages == syms.packages); 253 packages = syms.packages; 254 Assert.check(classes == null || classes == syms.classes); 255 classes = syms.classes; 256 } else { 257 packages = new HashMap<Name, PackageSymbol>(); 258 classes = new HashMap<Name, ClassSymbol>(); 259 } 260 261 packages.put(names.empty, syms.rootPackage); 262 syms.rootPackage.completer = this; 263 syms.unnamedPackage.completer = this; 264 } 265 266 /** Construct a new class reader, optionally treated as the 267 * definitive classreader for this invocation. 268 */ 269 protected ClassReader(Context context, boolean definitive) { 270 if (definitive) context.put(classReaderKey, this); 271 272 names = Names.instance(context); 273 syms = Symtab.instance(context); 274 types = Types.instance(context); 275 fileManager = context.get(JavaFileManager.class); 276 if (fileManager == null) 277 throw new AssertionError("FileManager initialization error"); 278 diagFactory = JCDiagnostic.Factory.instance(context); 279 280 init(syms, definitive); 281 log = Log.instance(context); 282 283 Options options = Options.instance(context); 284 annotate = Annotate.instance(context); 285 verbose = options.isSet(VERBOSE); 286 checkClassFile = options.isSet("-checkclassfile"); 287 Source source = Source.instance(context); 288 allowGenerics = source.allowGenerics(); 289 allowVarargs = source.allowVarargs(); 290 allowAnnotations = source.allowAnnotations(); 291 allowSimplifiedVarargs = source.allowSimplifiedVarargs(); 292 allowDefaultMethods = source.allowDefaultMethods(); 293 saveParameterNames = options.isSet("save-parameter-names"); 294 cacheCompletionFailure = options.isUnset("dev"); 295 preferSource = "source".equals(options.get("-Xprefer")); 296 297 completionFailureName = 298 options.isSet("failcomplete") 299 ? names.fromString(options.get("failcomplete")) 300 : null; 301 302 typevars = new Scope(syms.noSymbol); 303 304 lintClassfile = Lint.instance(context).isEnabled(LintCategory.CLASSFILE); 305 306 initAttributeReaders(); 307 } 308 309 /** Add member to class unless it is synthetic. 310 */ 311 private void enterMember(ClassSymbol c, Symbol sym) { 312 if ((sym.flags_field & (SYNTHETIC|BRIDGE)) != SYNTHETIC) 313 c.members_field.enter(sym); 314 } 315 316 /************************************************************************ 317 * Error Diagnoses 318 ***********************************************************************/ 319 320 321 public class BadClassFile extends CompletionFailure { 322 private static final long serialVersionUID = 0; 323 324 public BadClassFile(TypeSymbol sym, JavaFileObject file, JCDiagnostic diag) { 325 super(sym, createBadClassFileDiagnostic(file, diag)); 326 } 327 } 328 // where 329 private JCDiagnostic createBadClassFileDiagnostic(JavaFileObject file, JCDiagnostic diag) { 330 String key = (file.getKind() == JavaFileObject.Kind.SOURCE 331 ? "bad.source.file.header" : "bad.class.file.header"); 332 return diagFactory.fragment(key, file, diag); 333 } 334 335 public BadClassFile badClassFile(String key, Object... args) { 336 return new BadClassFile ( 337 currentOwner.enclClass(), 338 currentClassFile, 339 diagFactory.fragment(key, args)); 340 } 341 342 /************************************************************************ 343 * Buffer Access 344 ***********************************************************************/ 345 346 /** Read a character. 347 */ 348 char nextChar() { 349 return (char)(((buf[bp++] & 0xFF) << 8) + (buf[bp++] & 0xFF)); 350 } 351 352 /** Read a byte. 353 */ 354 int nextByte() { 355 return buf[bp++] & 0xFF; 356 } 357 358 /** Read an integer. 359 */ 360 int nextInt() { 361 return 362 ((buf[bp++] & 0xFF) << 24) + 363 ((buf[bp++] & 0xFF) << 16) + 364 ((buf[bp++] & 0xFF) << 8) + 365 (buf[bp++] & 0xFF); 366 } 367 368 /** Extract a character at position bp from buf. 369 */ 370 char getChar(int bp) { 371 return 372 (char)(((buf[bp] & 0xFF) << 8) + (buf[bp+1] & 0xFF)); 373 } 374 375 /** Extract an integer at position bp from buf. 376 */ 377 int getInt(int bp) { 378 return 379 ((buf[bp] & 0xFF) << 24) + 380 ((buf[bp+1] & 0xFF) << 16) + 381 ((buf[bp+2] & 0xFF) << 8) + 382 (buf[bp+3] & 0xFF); 383 } 384 385 386 /** Extract a long integer at position bp from buf. 387 */ 388 long getLong(int bp) { 389 DataInputStream bufin = 390 new DataInputStream(new ByteArrayInputStream(buf, bp, 8)); 391 try { 392 return bufin.readLong(); 393 } catch (IOException e) { 394 throw new AssertionError(e); 395 } 396 } 397 398 /** Extract a float at position bp from buf. 399 */ 400 float getFloat(int bp) { 401 DataInputStream bufin = 402 new DataInputStream(new ByteArrayInputStream(buf, bp, 4)); 403 try { 404 return bufin.readFloat(); 405 } catch (IOException e) { 406 throw new AssertionError(e); 407 } 408 } 409 410 /** Extract a double at position bp from buf. 411 */ 412 double getDouble(int bp) { 413 DataInputStream bufin = 414 new DataInputStream(new ByteArrayInputStream(buf, bp, 8)); 415 try { 416 return bufin.readDouble(); 417 } catch (IOException e) { 418 throw new AssertionError(e); 419 } 420 } 421 422 /************************************************************************ 423 * Constant Pool Access 424 ***********************************************************************/ 425 426 /** Index all constant pool entries, writing their start addresses into 427 * poolIdx. 428 */ 429 void indexPool() { 430 poolIdx = new int[nextChar()]; 431 poolObj = new Object[poolIdx.length]; 432 int i = 1; 433 while (i < poolIdx.length) { 434 poolIdx[i++] = bp; 435 byte tag = buf[bp++]; 436 switch (tag) { 437 case CONSTANT_Utf8: case CONSTANT_Unicode: { 438 int len = nextChar(); 439 bp = bp + len; 440 break; 441 } 442 case CONSTANT_Class: 443 case CONSTANT_String: 444 case CONSTANT_MethodType: 445 bp = bp + 2; 446 break; 447 case CONSTANT_MethodHandle: 448 bp = bp + 3; 449 break; 450 case CONSTANT_Fieldref: 451 case CONSTANT_Methodref: 452 case CONSTANT_InterfaceMethodref: 453 case CONSTANT_NameandType: 454 case CONSTANT_Integer: 455 case CONSTANT_Float: 456 case CONSTANT_InvokeDynamic: 457 bp = bp + 4; 458 break; 459 case CONSTANT_Long: 460 case CONSTANT_Double: 461 bp = bp + 8; 462 i++; 463 break; 464 default: 465 throw badClassFile("bad.const.pool.tag.at", 466 Byte.toString(tag), 467 Integer.toString(bp -1)); 468 } 469 } 470 } 471 472 /** Read constant pool entry at start address i, use pool as a cache. 473 */ 474 Object readPool(int i) { 475 Object result = poolObj[i]; 476 if (result != null) return result; 477 478 int index = poolIdx[i]; 479 if (index == 0) return null; 480 481 byte tag = buf[index]; 482 switch (tag) { 483 case CONSTANT_Utf8: 484 poolObj[i] = names.fromUtf(buf, index + 3, getChar(index + 1)); 485 break; 486 case CONSTANT_Unicode: 487 throw badClassFile("unicode.str.not.supported"); 488 case CONSTANT_Class: 489 poolObj[i] = readClassOrType(getChar(index + 1)); 490 break; 491 case CONSTANT_String: 492 // FIXME: (footprint) do not use toString here 493 poolObj[i] = readName(getChar(index + 1)).toString(); 494 break; 495 case CONSTANT_Fieldref: { 496 ClassSymbol owner = readClassSymbol(getChar(index + 1)); 497 NameAndType nt = (NameAndType)readPool(getChar(index + 3)); 498 poolObj[i] = new VarSymbol(0, nt.name, nt.uniqueType.type, owner); 499 break; 500 } 501 case CONSTANT_Methodref: 502 case CONSTANT_InterfaceMethodref: { 503 ClassSymbol owner = readClassSymbol(getChar(index + 1)); 504 NameAndType nt = (NameAndType)readPool(getChar(index + 3)); 505 poolObj[i] = new MethodSymbol(0, nt.name, nt.uniqueType.type, owner); 506 break; 507 } 508 case CONSTANT_NameandType: 509 poolObj[i] = new NameAndType( 510 readName(getChar(index + 1)), 511 readType(getChar(index + 3)), types); 512 break; 513 case CONSTANT_Integer: 514 poolObj[i] = getInt(index + 1); 515 break; 516 case CONSTANT_Float: 517 poolObj[i] = new Float(getFloat(index + 1)); 518 break; 519 case CONSTANT_Long: 520 poolObj[i] = new Long(getLong(index + 1)); 521 break; 522 case CONSTANT_Double: 523 poolObj[i] = new Double(getDouble(index + 1)); 524 break; 525 case CONSTANT_MethodHandle: 526 skipBytes(4); 527 break; 528 case CONSTANT_MethodType: 529 skipBytes(3); 530 break; 531 case CONSTANT_InvokeDynamic: 532 skipBytes(5); 533 break; 534 default: 535 throw badClassFile("bad.const.pool.tag", Byte.toString(tag)); 536 } 537 return poolObj[i]; 538 } 539 540 /** Read signature and convert to type. 541 */ 542 Type readType(int i) { 543 int index = poolIdx[i]; 544 return sigToType(buf, index + 3, getChar(index + 1)); 545 } 546 547 /** If name is an array type or class signature, return the 548 * corresponding type; otherwise return a ClassSymbol with given name. 549 */ 550 Object readClassOrType(int i) { 551 int index = poolIdx[i]; 552 int len = getChar(index + 1); 553 int start = index + 3; 554 Assert.check(buf[start] == '[' || buf[start + len - 1] != ';'); 555 // by the above assertion, the following test can be 556 // simplified to (buf[start] == '[') 557 return (buf[start] == '[' || buf[start + len - 1] == ';') 558 ? (Object)sigToType(buf, start, len) 559 : (Object)enterClass(names.fromUtf(internalize(buf, start, 560 len))); 561 } 562 563 /** Read signature and convert to type parameters. 564 */ 565 List<Type> readTypeParams(int i) { 566 int index = poolIdx[i]; 567 return sigToTypeParams(buf, index + 3, getChar(index + 1)); 568 } 569 570 /** Read class entry. 571 */ 572 ClassSymbol readClassSymbol(int i) { 573 return (ClassSymbol) (readPool(i)); 574 } 575 576 /** Read name. 577 */ 578 Name readName(int i) { 579 return (Name) (readPool(i)); 580 } 581 582 /************************************************************************ 583 * Reading Types 584 ***********************************************************************/ 585 586 /** The unread portion of the currently read type is 587 * signature[sigp..siglimit-1]. 588 */ 589 byte[] signature; 590 int sigp; 591 int siglimit; 592 boolean sigEnterPhase = false; 593 594 /** Convert signature to type, where signature is a byte array segment. 595 */ 596 Type sigToType(byte[] sig, int offset, int len) { 597 signature = sig; 598 sigp = offset; 599 siglimit = offset + len; 600 return sigToType(); 601 } 602 603 /** Convert signature to type, where signature is implicit. 604 */ 605 Type sigToType() { 606 switch ((char) signature[sigp]) { 607 case 'T': 608 sigp++; 609 int start = sigp; 610 while (signature[sigp] != ';') sigp++; 611 sigp++; 612 return sigEnterPhase 613 ? Type.noType 614 : findTypeVar(names.fromUtf(signature, start, sigp - 1 - start)); 615 case '+': { 616 sigp++; 617 Type t = sigToType(); 618 return new WildcardType(t, BoundKind.EXTENDS, 619 syms.boundClass); 620 } 621 case '*': 622 sigp++; 623 return new WildcardType(syms.objectType, BoundKind.UNBOUND, 624 syms.boundClass); 625 case '-': { 626 sigp++; 627 Type t = sigToType(); 628 return new WildcardType(t, BoundKind.SUPER, 629 syms.boundClass); 630 } 631 case 'B': 632 sigp++; 633 return syms.byteType; 634 case 'C': 635 sigp++; 636 return syms.charType; 637 case 'D': 638 sigp++; 639 return syms.doubleType; 640 case 'F': 641 sigp++; 642 return syms.floatType; 643 case 'I': 644 sigp++; 645 return syms.intType; 646 case 'J': 647 sigp++; 648 return syms.longType; 649 case 'L': 650 { 651 // int oldsigp = sigp; 652 Type t = classSigToType(); 653 if (sigp < siglimit && signature[sigp] == '.') 654 throw badClassFile("deprecated inner class signature syntax " + 655 "(please recompile from source)"); 656 /* 657 System.err.println(" decoded " + 658 new String(signature, oldsigp, sigp-oldsigp) + 659 " => " + t + " outer " + t.outer()); 660 */ 661 return t; 662 } 663 case 'S': 664 sigp++; 665 return syms.shortType; 666 case 'V': 667 sigp++; 668 return syms.voidType; 669 case 'Z': 670 sigp++; 671 return syms.booleanType; 672 case '[': 673 sigp++; 674 return new ArrayType(sigToType(), syms.arrayClass); 675 case '(': 676 sigp++; 677 List<Type> argtypes = sigToTypes(')'); 678 Type restype = sigToType(); 679 List<Type> thrown = List.nil(); 680 while (signature[sigp] == '^') { 681 sigp++; 682 thrown = thrown.prepend(sigToType()); 683 } 684 return new MethodType(argtypes, 685 restype, 686 thrown.reverse(), 687 syms.methodClass); 688 case '<': 689 typevars = typevars.dup(currentOwner); 690 Type poly = new ForAll(sigToTypeParams(), sigToType()); 691 typevars = typevars.leave(); 692 return poly; 693 default: 694 throw badClassFile("bad.signature", 695 Convert.utf2string(signature, sigp, 10)); 696 } 697 } 698 699 byte[] signatureBuffer = new byte[0]; 700 int sbp = 0; 701 /** Convert class signature to type, where signature is implicit. 702 */ 703 Type classSigToType() { 704 if (signature[sigp] != 'L') 705 throw badClassFile("bad.class.signature", 706 Convert.utf2string(signature, sigp, 10)); 707 sigp++; 708 Type outer = Type.noType; 709 int startSbp = sbp; 710 711 while (true) { 712 final byte c = signature[sigp++]; 713 switch (c) { 714 715 case ';': { // end 716 ClassSymbol t = enterClass(names.fromUtf(signatureBuffer, 717 startSbp, 718 sbp - startSbp)); 719 if (outer == Type.noType) 720 outer = t.erasure(types); 721 else 722 outer = new ClassType(outer, List.<Type>nil(), t); 723 sbp = startSbp; 724 return outer; 725 } 726 727 case '<': // generic arguments 728 ClassSymbol t = enterClass(names.fromUtf(signatureBuffer, 729 startSbp, 730 sbp - startSbp)); 731 outer = new ClassType(outer, sigToTypes('>'), t) { 732 boolean completed = false; 733 @Override 734 public Type getEnclosingType() { 735 if (!completed) { 736 completed = true; 737 tsym.complete(); 738 Type enclosingType = tsym.type.getEnclosingType(); 739 if (enclosingType != Type.noType) { 740 List<Type> typeArgs = 741 super.getEnclosingType().allparams(); 742 List<Type> typeParams = 743 enclosingType.allparams(); 744 if (typeParams.length() != typeArgs.length()) { 745 // no "rare" types 746 super.setEnclosingType(types.erasure(enclosingType)); 747 } else { 748 super.setEnclosingType(types.subst(enclosingType, 749 typeParams, 750 typeArgs)); 751 } 752 } else { 753 super.setEnclosingType(Type.noType); 754 } 755 } 756 return super.getEnclosingType(); 757 } 758 @Override 759 public void setEnclosingType(Type outer) { 760 throw new UnsupportedOperationException(); 761 } 762 }; 763 switch (signature[sigp++]) { 764 case ';': 765 if (sigp < signature.length && signature[sigp] == '.') { 766 // support old-style GJC signatures 767 // The signature produced was 768 // Lfoo/Outer<Lfoo/X;>;.Lfoo/Outer$Inner<Lfoo/Y;>; 769 // rather than say 770 // Lfoo/Outer<Lfoo/X;>.Inner<Lfoo/Y;>; 771 // so we skip past ".Lfoo/Outer$" 772 sigp += (sbp - startSbp) + // "foo/Outer" 773 3; // ".L" and "$" 774 signatureBuffer[sbp++] = (byte)'$'; 775 break; 776 } else { 777 sbp = startSbp; 778 return outer; 779 } 780 case '.': 781 signatureBuffer[sbp++] = (byte)'$'; 782 break; 783 default: 784 throw new AssertionError(signature[sigp-1]); 785 } 786 continue; 787 788 case '.': 789 signatureBuffer[sbp++] = (byte)'$'; 790 continue; 791 case '/': 792 signatureBuffer[sbp++] = (byte)'.'; 793 continue; 794 default: 795 signatureBuffer[sbp++] = c; 796 continue; 797 } 798 } 799 } 800 801 /** Convert (implicit) signature to list of types 802 * until `terminator' is encountered. 803 */ 804 List<Type> sigToTypes(char terminator) { 805 List<Type> head = List.of(null); 806 List<Type> tail = head; 807 while (signature[sigp] != terminator) 808 tail = tail.setTail(List.of(sigToType())); 809 sigp++; 810 return head.tail; 811 } 812 813 /** Convert signature to type parameters, where signature is a byte 814 * array segment. 815 */ 816 List<Type> sigToTypeParams(byte[] sig, int offset, int len) { 817 signature = sig; 818 sigp = offset; 819 siglimit = offset + len; 820 return sigToTypeParams(); 821 } 822 823 /** Convert signature to type parameters, where signature is implicit. 824 */ 825 List<Type> sigToTypeParams() { 826 List<Type> tvars = List.nil(); 827 if (signature[sigp] == '<') { 828 sigp++; 829 int start = sigp; 830 sigEnterPhase = true; 831 while (signature[sigp] != '>') 832 tvars = tvars.prepend(sigToTypeParam()); 833 sigEnterPhase = false; 834 sigp = start; 835 while (signature[sigp] != '>') 836 sigToTypeParam(); 837 sigp++; 838 } 839 return tvars.reverse(); 840 } 841 842 /** Convert (implicit) signature to type parameter. 843 */ 844 Type sigToTypeParam() { 845 int start = sigp; 846 while (signature[sigp] != ':') sigp++; 847 Name name = names.fromUtf(signature, start, sigp - start); 848 TypeVar tvar; 849 if (sigEnterPhase) { 850 tvar = new TypeVar(name, currentOwner, syms.botType); 851 typevars.enter(tvar.tsym); 852 } else { 853 tvar = (TypeVar)findTypeVar(name); 854 } 855 List<Type> bounds = List.nil(); 856 boolean allInterfaces = false; 857 if (signature[sigp] == ':' && signature[sigp+1] == ':') { 858 sigp++; 859 allInterfaces = true; 860 } 861 while (signature[sigp] == ':') { 862 sigp++; 863 bounds = bounds.prepend(sigToType()); 864 } 865 if (!sigEnterPhase) { 866 types.setBounds(tvar, bounds.reverse(), allInterfaces); 867 } 868 return tvar; 869 } 870 871 /** Find type variable with given name in `typevars' scope. 872 */ 873 Type findTypeVar(Name name) { 874 Scope.Entry e = typevars.lookup(name); 875 if (e.scope != null) { 876 return e.sym.type; 877 } else { 878 if (readingClassAttr) { 879 // While reading the class attribute, the supertypes 880 // might refer to a type variable from an enclosing element 881 // (method or class). 882 // If the type variable is defined in the enclosing class, 883 // we can actually find it in 884 // currentOwner.owner.type.getTypeArguments() 885 // However, until we have read the enclosing method attribute 886 // we don't know for sure if this owner is correct. It could 887 // be a method and there is no way to tell before reading the 888 // enclosing method attribute. 889 TypeVar t = new TypeVar(name, currentOwner, syms.botType); 890 missingTypeVariables = missingTypeVariables.prepend(t); 891 // System.err.println("Missing type var " + name); 892 return t; 893 } 894 throw badClassFile("undecl.type.var", name); 895 } 896 } 897 898 /************************************************************************ 899 * Reading Attributes 900 ***********************************************************************/ 901 902 protected enum AttributeKind { CLASS, MEMBER }; 903 protected abstract class AttributeReader { 904 protected AttributeReader(Name name, ClassFile.Version version, Set<AttributeKind> kinds) { 905 this.name = name; 906 this.version = version; 907 this.kinds = kinds; 908 } 909 910 protected boolean accepts(AttributeKind kind) { 911 if (kinds.contains(kind)) { 912 if (majorVersion > version.major || (majorVersion == version.major && minorVersion >= version.minor)) 913 return true; 914 915 if (lintClassfile && !warnedAttrs.contains(name)) { 916 JavaFileObject prev = log.useSource(currentClassFile); 917 try { 918 log.warning(LintCategory.CLASSFILE, (DiagnosticPosition) null, "future.attr", 919 name, version.major, version.minor, majorVersion, minorVersion); 920 } finally { 921 log.useSource(prev); 922 } 923 warnedAttrs.add(name); 924 } 925 } 926 return false; 927 } 928 929 protected abstract void read(Symbol sym, int attrLen); 930 931 protected final Name name; 932 protected final ClassFile.Version version; 933 protected final Set<AttributeKind> kinds; 934 } 935 936 protected Set<AttributeKind> CLASS_ATTRIBUTE = 937 EnumSet.of(AttributeKind.CLASS); 938 protected Set<AttributeKind> MEMBER_ATTRIBUTE = 939 EnumSet.of(AttributeKind.MEMBER); 940 protected Set<AttributeKind> CLASS_OR_MEMBER_ATTRIBUTE = 941 EnumSet.of(AttributeKind.CLASS, AttributeKind.MEMBER); 942 943 protected Map<Name, AttributeReader> attributeReaders = new HashMap<Name, AttributeReader>(); 944 945 private void initAttributeReaders() { 946 AttributeReader[] readers = { 947 // v45.3 attributes 948 949 new AttributeReader(names.Code, V45_3, MEMBER_ATTRIBUTE) { 950 protected void read(Symbol sym, int attrLen) { 951 if (readAllOfClassFile || saveParameterNames) 952 ((MethodSymbol)sym).code = readCode(sym); 953 else 954 bp = bp + attrLen; 955 } 956 }, 957 958 new AttributeReader(names.ConstantValue, V45_3, MEMBER_ATTRIBUTE) { 959 protected void read(Symbol sym, int attrLen) { 960 Object v = readPool(nextChar()); 961 // Ignore ConstantValue attribute if field not final. 962 if ((sym.flags() & FINAL) != 0) 963 ((VarSymbol) sym).setData(v); 964 } 965 }, 966 967 new AttributeReader(names.Deprecated, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) { 968 protected void read(Symbol sym, int attrLen) { 969 sym.flags_field |= DEPRECATED; 970 } 971 }, 972 973 new AttributeReader(names.Exceptions, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) { 974 protected void read(Symbol sym, int attrLen) { 975 int nexceptions = nextChar(); 976 List<Type> thrown = List.nil(); 977 for (int j = 0; j < nexceptions; j++) 978 thrown = thrown.prepend(readClassSymbol(nextChar()).type); 979 if (sym.type.getThrownTypes().isEmpty()) 980 sym.type.asMethodType().thrown = thrown.reverse(); 981 } 982 }, 983 984 new AttributeReader(names.InnerClasses, V45_3, CLASS_ATTRIBUTE) { 985 protected void read(Symbol sym, int attrLen) { 986 ClassSymbol c = (ClassSymbol) sym; 987 readInnerClasses(c); 988 } 989 }, 990 991 new AttributeReader(names.LocalVariableTable, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) { 992 protected void read(Symbol sym, int attrLen) { 993 int newbp = bp + attrLen; 994 if (saveParameterNames && !sawMethodParameters) { 995 // Pick up parameter names from the variable table. 996 // Parameter names are not explicitly identified as such, 997 // but all parameter name entries in the LocalVariableTable 998 // have a start_pc of 0. Therefore, we record the name 999 // indicies of all slots with a start_pc of zero in the 1000 // parameterNameIndicies array. 1001 // Note that this implicitly honors the JVMS spec that 1002 // there may be more than one LocalVariableTable, and that 1003 // there is no specified ordering for the entries. 1004 int numEntries = nextChar(); 1005 for (int i = 0; i < numEntries; i++) { 1006 int start_pc = nextChar(); 1007 int length = nextChar(); 1008 int nameIndex = nextChar(); 1009 int sigIndex = nextChar(); 1010 int register = nextChar(); 1011 if (start_pc == 0) { 1012 // ensure array large enough 1013 if (register >= parameterNameIndices.length) { 1014 int newSize = Math.max(register, parameterNameIndices.length + 8); 1015 parameterNameIndices = 1016 Arrays.copyOf(parameterNameIndices, newSize); 1017 } 1018 parameterNameIndices[register] = nameIndex; 1019 haveParameterNameIndices = true; 1020 } 1021 } 1022 } 1023 bp = newbp; 1024 } 1025 }, 1026 1027 new AttributeReader(names.MethodParameters, V52, MEMBER_ATTRIBUTE) { 1028 protected void read(Symbol sym, int attrlen) { 1029 int newbp = bp + attrlen; 1030 if (saveParameterNames) { 1031 sawMethodParameters = true; 1032 int numEntries = nextByte(); 1033 parameterNameIndices = new int[numEntries]; 1034 haveParameterNameIndices = true; 1035 for (int i = 0; i < numEntries; i++) { 1036 int nameIndex = nextChar(); 1037 int flags = nextInt(); 1038 parameterNameIndices[i] = nameIndex; 1039 } 1040 } 1041 bp = newbp; 1042 } 1043 }, 1044 1045 1046 new AttributeReader(names.SourceFile, V45_3, CLASS_ATTRIBUTE) { 1047 protected void read(Symbol sym, int attrLen) { 1048 ClassSymbol c = (ClassSymbol) sym; 1049 Name n = readName(nextChar()); 1050 c.sourcefile = new SourceFileObject(n, c.flatname); 1051 // If the class is a toplevel class, originating from a Java source file, 1052 // but the class name does not match the file name, then it is 1053 // an auxiliary class. 1054 String sn = n.toString(); 1055 if (c.owner.kind == Kinds.PCK && 1056 sn.endsWith(".java") && 1057 !sn.equals(c.name.toString()+".java")) { 1058 c.flags_field |= AUXILIARY; 1059 } 1060 } 1061 }, 1062 1063 new AttributeReader(names.Synthetic, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) { 1064 protected void read(Symbol sym, int attrLen) { 1065 // bridge methods are visible when generics not enabled 1066 if (allowGenerics || (sym.flags_field & BRIDGE) == 0) 1067 sym.flags_field |= SYNTHETIC; 1068 } 1069 }, 1070 1071 // standard v49 attributes 1072 1073 new AttributeReader(names.EnclosingMethod, V49, CLASS_ATTRIBUTE) { 1074 protected void read(Symbol sym, int attrLen) { 1075 int newbp = bp + attrLen; 1076 readEnclosingMethodAttr(sym); 1077 bp = newbp; 1078 } 1079 }, 1080 1081 new AttributeReader(names.Signature, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1082 @Override 1083 protected boolean accepts(AttributeKind kind) { 1084 return super.accepts(kind) && allowGenerics; 1085 } 1086 1087 protected void read(Symbol sym, int attrLen) { 1088 if (sym.kind == TYP) { 1089 ClassSymbol c = (ClassSymbol) sym; 1090 readingClassAttr = true; 1091 try { 1092 ClassType ct1 = (ClassType)c.type; 1093 Assert.check(c == currentOwner); 1094 ct1.typarams_field = readTypeParams(nextChar()); 1095 ct1.supertype_field = sigToType(); 1096 ListBuffer<Type> is = new ListBuffer<Type>(); 1097 while (sigp != siglimit) is.append(sigToType()); 1098 ct1.interfaces_field = is.toList(); 1099 } finally { 1100 readingClassAttr = false; 1101 } 1102 } else { 1103 List<Type> thrown = sym.type.getThrownTypes(); 1104 sym.type = readType(nextChar()); 1105 //- System.err.println(" # " + sym.type); 1106 if (sym.kind == MTH && sym.type.getThrownTypes().isEmpty()) 1107 sym.type.asMethodType().thrown = thrown; 1108 1109 } 1110 } 1111 }, 1112 1113 // v49 annotation attributes 1114 1115 new AttributeReader(names.AnnotationDefault, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1116 protected void read(Symbol sym, int attrLen) { 1117 attachAnnotationDefault(sym); 1118 } 1119 }, 1120 1121 new AttributeReader(names.RuntimeInvisibleAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1122 protected void read(Symbol sym, int attrLen) { 1123 attachAnnotations(sym); 1124 } 1125 }, 1126 1127 new AttributeReader(names.RuntimeInvisibleParameterAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1128 protected void read(Symbol sym, int attrLen) { 1129 attachParameterAnnotations(sym); 1130 } 1131 }, 1132 1133 new AttributeReader(names.RuntimeVisibleAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1134 protected void read(Symbol sym, int attrLen) { 1135 attachAnnotations(sym); 1136 } 1137 }, 1138 1139 new AttributeReader(names.RuntimeVisibleParameterAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1140 protected void read(Symbol sym, int attrLen) { 1141 attachParameterAnnotations(sym); 1142 } 1143 }, 1144 1145 // additional "legacy" v49 attributes, superceded by flags 1146 1147 new AttributeReader(names.Annotation, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1148 protected void read(Symbol sym, int attrLen) { 1149 if (allowAnnotations) 1150 sym.flags_field |= ANNOTATION; 1151 } 1152 }, 1153 1154 new AttributeReader(names.Bridge, V49, MEMBER_ATTRIBUTE) { 1155 protected void read(Symbol sym, int attrLen) { 1156 sym.flags_field |= BRIDGE; 1157 if (!allowGenerics) 1158 sym.flags_field &= ~SYNTHETIC; 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 if (allowVarargs) 1171 sym.flags_field |= VARARGS; 1172 } 1173 }, 1174 1175 new AttributeReader(names.RuntimeVisibleTypeAnnotations, V52, CLASS_OR_MEMBER_ATTRIBUTE) { 1176 protected void read(Symbol sym, int attrLen) { 1177 attachTypeAnnotations(sym); 1178 } 1179 }, 1180 1181 new AttributeReader(names.RuntimeInvisibleTypeAnnotations, V52, CLASS_OR_MEMBER_ATTRIBUTE) { 1182 protected void read(Symbol sym, int attrLen) { 1183 attachTypeAnnotations(sym); 1184 } 1185 }, 1186 1187 1188 // The following attributes for a Code attribute are not currently handled 1189 // StackMapTable 1190 // SourceDebugExtension 1191 // LineNumberTable 1192 // LocalVariableTypeTable 1193 }; 1194 1195 for (AttributeReader r: readers) 1196 attributeReaders.put(r.name, r); 1197 } 1198 1199 /** Report unrecognized attribute. 1200 */ 1201 void unrecognized(Name attrName) { 1202 if (checkClassFile) 1203 printCCF("ccf.unrecognized.attribute", attrName); 1204 } 1205 1206 1207 1208 protected void readEnclosingMethodAttr(Symbol sym) { 1209 // sym is a nested class with an "Enclosing Method" attribute 1210 // remove sym from it's current owners scope and place it in 1211 // the scope specified by the attribute 1212 sym.owner.members().remove(sym); 1213 ClassSymbol self = (ClassSymbol)sym; 1214 ClassSymbol c = readClassSymbol(nextChar()); 1215 NameAndType nt = (NameAndType)readPool(nextChar()); 1216 1217 if (c.members_field == null) 1218 throw badClassFile("bad.enclosing.class", self, c); 1219 1220 MethodSymbol m = findMethod(nt, c.members_field, self.flags()); 1221 if (nt != null && m == null) 1222 throw badClassFile("bad.enclosing.method", self); 1223 1224 self.name = simpleBinaryName(self.flatname, c.flatname) ; 1225 self.owner = m != null ? m : c; 1226 if (self.name.isEmpty()) 1227 self.fullname = names.empty; 1228 else 1229 self.fullname = ClassSymbol.formFullName(self.name, self.owner); 1230 1231 if (m != null) { 1232 ((ClassType)sym.type).setEnclosingType(m.type); 1233 } else if ((self.flags_field & STATIC) == 0) { 1234 ((ClassType)sym.type).setEnclosingType(c.type); 1235 } else { 1236 ((ClassType)sym.type).setEnclosingType(Type.noType); 1237 } 1238 enterTypevars(self); 1239 if (!missingTypeVariables.isEmpty()) { 1240 ListBuffer<Type> typeVars = new ListBuffer<Type>(); 1241 for (Type typevar : missingTypeVariables) { 1242 typeVars.append(findTypeVar(typevar.tsym.name)); 1243 } 1244 foundTypeVariables = typeVars.toList(); 1245 } else { 1246 foundTypeVariables = List.nil(); 1247 } 1248 } 1249 1250 // See java.lang.Class 1251 private Name simpleBinaryName(Name self, Name enclosing) { 1252 String simpleBinaryName = self.toString().substring(enclosing.toString().length()); 1253 if (simpleBinaryName.length() < 1 || simpleBinaryName.charAt(0) != '$') 1254 throw badClassFile("bad.enclosing.method", self); 1255 int index = 1; 1256 while (index < simpleBinaryName.length() && 1257 isAsciiDigit(simpleBinaryName.charAt(index))) 1258 index++; 1259 return names.fromString(simpleBinaryName.substring(index)); 1260 } 1261 1262 private MethodSymbol findMethod(NameAndType nt, Scope scope, long flags) { 1263 if (nt == null) 1264 return null; 1265 1266 MethodType type = nt.uniqueType.type.asMethodType(); 1267 1268 for (Scope.Entry e = scope.lookup(nt.name); e.scope != null; e = e.next()) 1269 if (e.sym.kind == MTH && isSameBinaryType(e.sym.type.asMethodType(), type)) 1270 return (MethodSymbol)e.sym; 1271 1272 if (nt.name != names.init) 1273 // not a constructor 1274 return null; 1275 if ((flags & INTERFACE) != 0) 1276 // no enclosing instance 1277 return null; 1278 if (nt.uniqueType.type.getParameterTypes().isEmpty()) 1279 // no parameters 1280 return null; 1281 1282 // A constructor of an inner class. 1283 // Remove the first argument (the enclosing instance) 1284 nt.setType(new MethodType(nt.uniqueType.type.getParameterTypes().tail, 1285 nt.uniqueType.type.getReturnType(), 1286 nt.uniqueType.type.getThrownTypes(), 1287 syms.methodClass)); 1288 // Try searching again 1289 return findMethod(nt, scope, flags); 1290 } 1291 1292 /** Similar to Types.isSameType but avoids completion */ 1293 private boolean isSameBinaryType(MethodType mt1, MethodType mt2) { 1294 List<Type> types1 = types.erasure(mt1.getParameterTypes()) 1295 .prepend(types.erasure(mt1.getReturnType())); 1296 List<Type> types2 = mt2.getParameterTypes().prepend(mt2.getReturnType()); 1297 while (!types1.isEmpty() && !types2.isEmpty()) { 1298 if (types1.head.tsym != types2.head.tsym) 1299 return false; 1300 types1 = types1.tail; 1301 types2 = types2.tail; 1302 } 1303 return types1.isEmpty() && types2.isEmpty(); 1304 } 1305 1306 /** 1307 * Character.isDigit answers <tt>true</tt> to some non-ascii 1308 * digits. This one does not. <b>copied from java.lang.Class</b> 1309 */ 1310 private static boolean isAsciiDigit(char c) { 1311 return '0' <= c && c <= '9'; 1312 } 1313 1314 /** Read member attributes. 1315 */ 1316 void readMemberAttrs(Symbol sym) { 1317 readAttrs(sym, AttributeKind.MEMBER); 1318 } 1319 1320 void readAttrs(Symbol sym, AttributeKind kind) { 1321 char ac = nextChar(); 1322 for (int i = 0; i < ac; i++) { 1323 Name attrName = readName(nextChar()); 1324 int attrLen = nextInt(); 1325 AttributeReader r = attributeReaders.get(attrName); 1326 if (r != null && r.accepts(kind)) 1327 r.read(sym, attrLen); 1328 else { 1329 unrecognized(attrName); 1330 bp = bp + attrLen; 1331 } 1332 } 1333 } 1334 1335 private boolean readingClassAttr = false; 1336 private List<Type> missingTypeVariables = List.nil(); 1337 private List<Type> foundTypeVariables = List.nil(); 1338 1339 /** Read class attributes. 1340 */ 1341 void readClassAttrs(ClassSymbol c) { 1342 readAttrs(c, AttributeKind.CLASS); 1343 } 1344 1345 /** Read code block. 1346 */ 1347 Code readCode(Symbol owner) { 1348 nextChar(); // max_stack 1349 nextChar(); // max_locals 1350 final int code_length = nextInt(); 1351 bp += code_length; 1352 final char exception_table_length = nextChar(); 1353 bp += exception_table_length * 8; 1354 readMemberAttrs(owner); 1355 return null; 1356 } 1357 1358 /************************************************************************ 1359 * Reading Java-language annotations 1360 ***********************************************************************/ 1361 1362 /** Attach annotations. 1363 */ 1364 void attachAnnotations(final Symbol sym) { 1365 int numAttributes = nextChar(); 1366 if (numAttributes != 0) { 1367 ListBuffer<CompoundAnnotationProxy> proxies = 1368 new ListBuffer<CompoundAnnotationProxy>(); 1369 for (int i = 0; i<numAttributes; i++) { 1370 CompoundAnnotationProxy proxy = readCompoundAnnotation(); 1371 if (proxy.type.tsym == syms.proprietaryType.tsym) 1372 sym.flags_field |= PROPRIETARY; 1373 else 1374 proxies.append(proxy); 1375 } 1376 annotate.normal(new AnnotationCompleter(sym, proxies.toList())); 1377 } 1378 } 1379 1380 /** Attach parameter annotations. 1381 */ 1382 void attachParameterAnnotations(final Symbol method) { 1383 final MethodSymbol meth = (MethodSymbol)method; 1384 int numParameters = buf[bp++] & 0xFF; 1385 List<VarSymbol> parameters = meth.params(); 1386 int pnum = 0; 1387 while (parameters.tail != null) { 1388 attachAnnotations(parameters.head); 1389 parameters = parameters.tail; 1390 pnum++; 1391 } 1392 if (pnum != numParameters) { 1393 throw badClassFile("bad.runtime.invisible.param.annotations", meth); 1394 } 1395 } 1396 1397 void attachTypeAnnotations(final Symbol sym) { 1398 int numAttributes = nextChar(); 1399 if (numAttributes != 0) { 1400 ListBuffer<TypeAnnotationProxy> proxies = 1401 ListBuffer.lb(); 1402 for (int i = 0; i < numAttributes; i++) 1403 proxies.append(readTypeAnnotation()); 1404 annotate.normal(new TypeAnnotationCompleter(sym, proxies.toList())); 1405 } 1406 } 1407 1408 /** Attach the default value for an annotation element. 1409 */ 1410 void attachAnnotationDefault(final Symbol sym) { 1411 final MethodSymbol meth = (MethodSymbol)sym; // only on methods 1412 final Attribute value = readAttributeValue(); 1413 1414 // The default value is set later during annotation. It might 1415 // be the case that the Symbol sym is annotated _after_ the 1416 // repeating instances that depend on this default value, 1417 // because of this we set an interim value that tells us this 1418 // element (most likely) has a default. 1419 // 1420 // Set interim value for now, reset just before we do this 1421 // properly at annotate time. 1422 meth.defaultValue = value; 1423 annotate.normal(new AnnotationDefaultCompleter(meth, value)); 1424 } 1425 1426 Type readTypeOrClassSymbol(int i) { 1427 // support preliminary jsr175-format class files 1428 if (buf[poolIdx[i]] == CONSTANT_Class) 1429 return readClassSymbol(i).type; 1430 return readType(i); 1431 } 1432 Type readEnumType(int i) { 1433 // support preliminary jsr175-format class files 1434 int index = poolIdx[i]; 1435 int length = getChar(index + 1); 1436 if (buf[index + length + 2] != ';') 1437 return enterClass(readName(i)).type; 1438 return readType(i); 1439 } 1440 1441 CompoundAnnotationProxy readCompoundAnnotation() { 1442 Type t = readTypeOrClassSymbol(nextChar()); 1443 int numFields = nextChar(); 1444 ListBuffer<Pair<Name,Attribute>> pairs = 1445 new ListBuffer<Pair<Name,Attribute>>(); 1446 for (int i=0; i<numFields; i++) { 1447 Name name = readName(nextChar()); 1448 Attribute value = readAttributeValue(); 1449 pairs.append(new Pair<Name,Attribute>(name, value)); 1450 } 1451 return new CompoundAnnotationProxy(t, pairs.toList()); 1452 } 1453 1454 TypeAnnotationProxy readTypeAnnotation() { 1455 TypeAnnotationPosition position = readPosition(); 1456 CompoundAnnotationProxy proxy = readCompoundAnnotation(); 1457 1458 return new TypeAnnotationProxy(proxy, position); 1459 } 1460 1461 TypeAnnotationPosition readPosition() { 1462 int tag = nextByte(); // TargetType tag is a byte 1463 1464 if (!TargetType.isValidTargetTypeValue(tag)) 1465 throw this.badClassFile("bad.type.annotation.value", String.format("0x%02X", tag)); 1466 1467 TypeAnnotationPosition position = new TypeAnnotationPosition(); 1468 TargetType type = TargetType.fromTargetTypeValue(tag); 1469 1470 position.type = type; 1471 1472 switch (type) { 1473 // type cast 1474 case CAST: 1475 // instanceof 1476 case INSTANCEOF: 1477 // new expression 1478 case NEW: 1479 position.offset = nextChar(); 1480 break; 1481 // local variable 1482 case LOCAL_VARIABLE: 1483 // resource variable 1484 case RESOURCE_VARIABLE: 1485 int table_length = nextChar(); 1486 position.lvarOffset = new int[table_length]; 1487 position.lvarLength = new int[table_length]; 1488 position.lvarIndex = new int[table_length]; 1489 1490 for (int i = 0; i < table_length; ++i) { 1491 position.lvarOffset[i] = nextChar(); 1492 position.lvarLength[i] = nextChar(); 1493 position.lvarIndex[i] = nextChar(); 1494 } 1495 break; 1496 // exception parameter 1497 case EXCEPTION_PARAMETER: 1498 position.exception_index = nextByte(); 1499 break; 1500 // method receiver 1501 case METHOD_RECEIVER: 1502 // Do nothing 1503 break; 1504 // type parameter 1505 case CLASS_TYPE_PARAMETER: 1506 case METHOD_TYPE_PARAMETER: 1507 position.parameter_index = nextByte(); 1508 break; 1509 // type parameter bound 1510 case CLASS_TYPE_PARAMETER_BOUND: 1511 case METHOD_TYPE_PARAMETER_BOUND: 1512 position.parameter_index = nextByte(); 1513 position.bound_index = nextByte(); 1514 break; 1515 // class extends or implements clause 1516 case CLASS_EXTENDS: 1517 position.type_index = nextChar(); 1518 break; 1519 // throws 1520 case THROWS: 1521 position.type_index = nextChar(); 1522 break; 1523 // method parameter 1524 case METHOD_FORMAL_PARAMETER: 1525 position.parameter_index = nextByte(); 1526 break; 1527 // method/constructor/reference type argument 1528 case CONSTRUCTOR_INVOCATION_TYPE_ARGUMENT: 1529 case METHOD_INVOCATION_TYPE_ARGUMENT: 1530 case METHOD_REFERENCE_TYPE_ARGUMENT: 1531 position.offset = nextChar(); 1532 position.type_index = nextByte(); 1533 break; 1534 // We don't need to worry about these 1535 case METHOD_RETURN: 1536 case FIELD: 1537 break; 1538 // lambda formal parameter 1539 case LAMBDA_FORMAL_PARAMETER: 1540 position.parameter_index = nextByte(); 1541 break; 1542 case UNKNOWN: 1543 throw new AssertionError("jvm.ClassReader: UNKNOWN target type should never occur!"); 1544 default: 1545 throw new AssertionError("jvm.ClassReader: Unknown target type for position: " + position); 1546 } 1547 1548 { // See whether there is location info and read it 1549 int len = nextByte(); 1550 ListBuffer<Integer> loc = ListBuffer.lb(); 1551 for (int i = 0; i < len * TypeAnnotationPosition.TypePathEntry.bytesPerEntry; ++i) 1552 loc = loc.append(nextByte()); 1553 position.location = TypeAnnotationPosition.getTypePathFromBinary(loc.toList()); 1554 } 1555 1556 return position; 1557 } 1558 1559 Attribute readAttributeValue() { 1560 char c = (char) buf[bp++]; 1561 switch (c) { 1562 case 'B': 1563 return new Attribute.Constant(syms.byteType, readPool(nextChar())); 1564 case 'C': 1565 return new Attribute.Constant(syms.charType, readPool(nextChar())); 1566 case 'D': 1567 return new Attribute.Constant(syms.doubleType, readPool(nextChar())); 1568 case 'F': 1569 return new Attribute.Constant(syms.floatType, readPool(nextChar())); 1570 case 'I': 1571 return new Attribute.Constant(syms.intType, readPool(nextChar())); 1572 case 'J': 1573 return new Attribute.Constant(syms.longType, readPool(nextChar())); 1574 case 'S': 1575 return new Attribute.Constant(syms.shortType, readPool(nextChar())); 1576 case 'Z': 1577 return new Attribute.Constant(syms.booleanType, readPool(nextChar())); 1578 case 's': 1579 return new Attribute.Constant(syms.stringType, readPool(nextChar()).toString()); 1580 case 'e': 1581 return new EnumAttributeProxy(readEnumType(nextChar()), readName(nextChar())); 1582 case 'c': 1583 return new Attribute.Class(types, readTypeOrClassSymbol(nextChar())); 1584 case '[': { 1585 int n = nextChar(); 1586 ListBuffer<Attribute> l = new ListBuffer<Attribute>(); 1587 for (int i=0; i<n; i++) 1588 l.append(readAttributeValue()); 1589 return new ArrayAttributeProxy(l.toList()); 1590 } 1591 case '@': 1592 return readCompoundAnnotation(); 1593 default: 1594 throw new AssertionError("unknown annotation tag '" + c + "'"); 1595 } 1596 } 1597 1598 interface ProxyVisitor extends Attribute.Visitor { 1599 void visitEnumAttributeProxy(EnumAttributeProxy proxy); 1600 void visitArrayAttributeProxy(ArrayAttributeProxy proxy); 1601 void visitCompoundAnnotationProxy(CompoundAnnotationProxy proxy); 1602 } 1603 1604 static class EnumAttributeProxy extends Attribute { 1605 Type enumType; 1606 Name enumerator; 1607 public EnumAttributeProxy(Type enumType, Name enumerator) { 1608 super(null); 1609 this.enumType = enumType; 1610 this.enumerator = enumerator; 1611 } 1612 public void accept(Visitor v) { ((ProxyVisitor)v).visitEnumAttributeProxy(this); } 1613 @Override 1614 public String toString() { 1615 return "/*proxy enum*/" + enumType + "." + enumerator; 1616 } 1617 } 1618 1619 static class ArrayAttributeProxy extends Attribute { 1620 List<Attribute> values; 1621 ArrayAttributeProxy(List<Attribute> values) { 1622 super(null); 1623 this.values = values; 1624 } 1625 public void accept(Visitor v) { ((ProxyVisitor)v).visitArrayAttributeProxy(this); } 1626 @Override 1627 public String toString() { 1628 return "{" + values + "}"; 1629 } 1630 } 1631 1632 /** A temporary proxy representing a compound attribute. 1633 */ 1634 static class CompoundAnnotationProxy extends Attribute { 1635 final List<Pair<Name,Attribute>> values; 1636 public CompoundAnnotationProxy(Type type, 1637 List<Pair<Name,Attribute>> values) { 1638 super(type); 1639 this.values = values; 1640 } 1641 public void accept(Visitor v) { ((ProxyVisitor)v).visitCompoundAnnotationProxy(this); } 1642 @Override 1643 public String toString() { 1644 StringBuilder buf = new StringBuilder(); 1645 buf.append("@"); 1646 buf.append(type.tsym.getQualifiedName()); 1647 buf.append("/*proxy*/{"); 1648 boolean first = true; 1649 for (List<Pair<Name,Attribute>> v = values; 1650 v.nonEmpty(); v = v.tail) { 1651 Pair<Name,Attribute> value = v.head; 1652 if (!first) buf.append(","); 1653 first = false; 1654 buf.append(value.fst); 1655 buf.append("="); 1656 buf.append(value.snd); 1657 } 1658 buf.append("}"); 1659 return buf.toString(); 1660 } 1661 } 1662 1663 /** A temporary proxy representing a type annotation. 1664 */ 1665 static class TypeAnnotationProxy { 1666 final CompoundAnnotationProxy compound; 1667 final TypeAnnotationPosition position; 1668 public TypeAnnotationProxy(CompoundAnnotationProxy compound, 1669 TypeAnnotationPosition position) { 1670 this.compound = compound; 1671 this.position = position; 1672 } 1673 } 1674 1675 class AnnotationDeproxy implements ProxyVisitor { 1676 private ClassSymbol requestingOwner = currentOwner.kind == MTH 1677 ? currentOwner.enclClass() : (ClassSymbol)currentOwner; 1678 1679 List<Attribute.Compound> deproxyCompoundList(List<CompoundAnnotationProxy> pl) { 1680 // also must fill in types!!!! 1681 ListBuffer<Attribute.Compound> buf = 1682 new ListBuffer<Attribute.Compound>(); 1683 for (List<CompoundAnnotationProxy> l = pl; l.nonEmpty(); l=l.tail) { 1684 buf.append(deproxyCompound(l.head)); 1685 } 1686 return buf.toList(); 1687 } 1688 1689 Attribute.Compound deproxyCompound(CompoundAnnotationProxy a) { 1690 ListBuffer<Pair<Symbol.MethodSymbol,Attribute>> buf = 1691 new ListBuffer<Pair<Symbol.MethodSymbol,Attribute>>(); 1692 for (List<Pair<Name,Attribute>> l = a.values; 1693 l.nonEmpty(); 1694 l = l.tail) { 1695 MethodSymbol meth = findAccessMethod(a.type, l.head.fst); 1696 buf.append(new Pair<Symbol.MethodSymbol,Attribute> 1697 (meth, deproxy(meth.type.getReturnType(), l.head.snd))); 1698 } 1699 return new Attribute.Compound(a.type, buf.toList()); 1700 } 1701 1702 MethodSymbol findAccessMethod(Type container, Name name) { 1703 CompletionFailure failure = null; 1704 try { 1705 for (Scope.Entry e = container.tsym.members().lookup(name); 1706 e.scope != null; 1707 e = e.next()) { 1708 Symbol sym = e.sym; 1709 if (sym.kind == MTH && sym.type.getParameterTypes().length() == 0) 1710 return (MethodSymbol) sym; 1711 } 1712 } catch (CompletionFailure ex) { 1713 failure = ex; 1714 } 1715 // The method wasn't found: emit a warning and recover 1716 JavaFileObject prevSource = log.useSource(requestingOwner.classfile); 1717 try { 1718 if (failure == null) { 1719 log.warning("annotation.method.not.found", 1720 container, 1721 name); 1722 } else { 1723 log.warning("annotation.method.not.found.reason", 1724 container, 1725 name, 1726 failure.getDetailValue());//diagnostic, if present 1727 } 1728 } finally { 1729 log.useSource(prevSource); 1730 } 1731 // Construct a new method type and symbol. Use bottom 1732 // type (typeof null) as return type because this type is 1733 // a subtype of all reference types and can be converted 1734 // to primitive types by unboxing. 1735 MethodType mt = new MethodType(List.<Type>nil(), 1736 syms.botType, 1737 List.<Type>nil(), 1738 syms.methodClass); 1739 return new MethodSymbol(PUBLIC | ABSTRACT, name, mt, container.tsym); 1740 } 1741 1742 Attribute result; 1743 Type type; 1744 Attribute deproxy(Type t, Attribute a) { 1745 Type oldType = type; 1746 try { 1747 type = t; 1748 a.accept(this); 1749 return result; 1750 } finally { 1751 type = oldType; 1752 } 1753 } 1754 1755 // implement Attribute.Visitor below 1756 1757 public void visitConstant(Attribute.Constant value) { 1758 // assert value.type == type; 1759 result = value; 1760 } 1761 1762 public void visitClass(Attribute.Class clazz) { 1763 result = clazz; 1764 } 1765 1766 public void visitEnum(Attribute.Enum e) { 1767 throw new AssertionError(); // shouldn't happen 1768 } 1769 1770 public void visitCompound(Attribute.Compound compound) { 1771 throw new AssertionError(); // shouldn't happen 1772 } 1773 1774 public void visitArray(Attribute.Array array) { 1775 throw new AssertionError(); // shouldn't happen 1776 } 1777 1778 public void visitError(Attribute.Error e) { 1779 throw new AssertionError(); // shouldn't happen 1780 } 1781 1782 public void visitEnumAttributeProxy(EnumAttributeProxy proxy) { 1783 // type.tsym.flatName() should == proxy.enumFlatName 1784 TypeSymbol enumTypeSym = proxy.enumType.tsym; 1785 VarSymbol enumerator = null; 1786 CompletionFailure failure = null; 1787 try { 1788 for (Scope.Entry e = enumTypeSym.members().lookup(proxy.enumerator); 1789 e.scope != null; 1790 e = e.next()) { 1791 if (e.sym.kind == VAR) { 1792 enumerator = (VarSymbol)e.sym; 1793 break; 1794 } 1795 } 1796 } 1797 catch (CompletionFailure ex) { 1798 failure = ex; 1799 } 1800 if (enumerator == null) { 1801 if (failure != null) { 1802 log.warning("unknown.enum.constant.reason", 1803 currentClassFile, enumTypeSym, proxy.enumerator, 1804 failure.getDiagnostic()); 1805 } else { 1806 log.warning("unknown.enum.constant", 1807 currentClassFile, enumTypeSym, proxy.enumerator); 1808 } 1809 result = new Attribute.Enum(enumTypeSym.type, 1810 new VarSymbol(0, proxy.enumerator, syms.botType, enumTypeSym)); 1811 } else { 1812 result = new Attribute.Enum(enumTypeSym.type, enumerator); 1813 } 1814 } 1815 1816 public void visitArrayAttributeProxy(ArrayAttributeProxy proxy) { 1817 int length = proxy.values.length(); 1818 Attribute[] ats = new Attribute[length]; 1819 Type elemtype = types.elemtype(type); 1820 int i = 0; 1821 for (List<Attribute> p = proxy.values; p.nonEmpty(); p = p.tail) { 1822 ats[i++] = deproxy(elemtype, p.head); 1823 } 1824 result = new Attribute.Array(type, ats); 1825 } 1826 1827 public void visitCompoundAnnotationProxy(CompoundAnnotationProxy proxy) { 1828 result = deproxyCompound(proxy); 1829 } 1830 } 1831 1832 class AnnotationDefaultCompleter extends AnnotationDeproxy implements Annotate.Annotator { 1833 final MethodSymbol sym; 1834 final Attribute value; 1835 final JavaFileObject classFile = currentClassFile; 1836 @Override 1837 public String toString() { 1838 return " ClassReader store default for " + sym.owner + "." + sym + " is " + value; 1839 } 1840 AnnotationDefaultCompleter(MethodSymbol sym, Attribute value) { 1841 this.sym = sym; 1842 this.value = value; 1843 } 1844 // implement Annotate.Annotator.enterAnnotation() 1845 public void enterAnnotation() { 1846 JavaFileObject previousClassFile = currentClassFile; 1847 try { 1848 // Reset the interim value set earlier in 1849 // attachAnnotationDefault(). 1850 sym.defaultValue = null; 1851 currentClassFile = classFile; 1852 sym.defaultValue = deproxy(sym.type.getReturnType(), value); 1853 } finally { 1854 currentClassFile = previousClassFile; 1855 } 1856 } 1857 } 1858 1859 class AnnotationCompleter extends AnnotationDeproxy implements Annotate.Annotator { 1860 final Symbol sym; 1861 final List<CompoundAnnotationProxy> l; 1862 final JavaFileObject classFile; 1863 @Override 1864 public String toString() { 1865 return " ClassReader annotate " + sym.owner + "." + sym + " with " + l; 1866 } 1867 AnnotationCompleter(Symbol sym, List<CompoundAnnotationProxy> l) { 1868 this.sym = sym; 1869 this.l = l; 1870 this.classFile = currentClassFile; 1871 } 1872 // implement Annotate.Annotator.enterAnnotation() 1873 public void enterAnnotation() { 1874 JavaFileObject previousClassFile = currentClassFile; 1875 try { 1876 currentClassFile = classFile; 1877 Annotations annotations = sym.annotations; 1878 List<Attribute.Compound> newList = deproxyCompoundList(l); 1879 if (annotations.pendingCompletion()) { 1880 annotations.setDeclarationAttributes(newList); 1881 } else { 1882 annotations.append(newList); 1883 } 1884 } finally { 1885 currentClassFile = previousClassFile; 1886 } 1887 } 1888 } 1889 1890 class TypeAnnotationCompleter extends AnnotationCompleter { 1891 1892 List<TypeAnnotationProxy> proxies; 1893 1894 TypeAnnotationCompleter(Symbol sym, 1895 List<TypeAnnotationProxy> proxies) { 1896 super(sym, List.<CompoundAnnotationProxy>nil()); 1897 this.proxies = proxies; 1898 } 1899 1900 List<Attribute.TypeCompound> deproxyTypeCompoundList(List<TypeAnnotationProxy> proxies) { 1901 ListBuffer<Attribute.TypeCompound> buf = ListBuffer.lb(); 1902 for (TypeAnnotationProxy proxy: proxies) { 1903 Attribute.Compound compound = deproxyCompound(proxy.compound); 1904 Attribute.TypeCompound typeCompound = new Attribute.TypeCompound(compound, proxy.position); 1905 buf.add(typeCompound); 1906 } 1907 return buf.toList(); 1908 } 1909 1910 @Override 1911 public void enterAnnotation() { 1912 JavaFileObject previousClassFile = currentClassFile; 1913 try { 1914 currentClassFile = classFile; 1915 List<Attribute.TypeCompound> newList = deproxyTypeCompoundList(proxies); 1916 sym.annotations.setTypeAttributes(newList.prependList(sym.getRawTypeAttributes())); 1917 } finally { 1918 currentClassFile = previousClassFile; 1919 } 1920 } 1921 } 1922 1923 1924 /************************************************************************ 1925 * Reading Symbols 1926 ***********************************************************************/ 1927 1928 /** Read a field. 1929 */ 1930 VarSymbol readField() { 1931 long flags = adjustFieldFlags(nextChar()); 1932 Name name = readName(nextChar()); 1933 Type type = readType(nextChar()); 1934 VarSymbol v = new VarSymbol(flags, name, type, currentOwner); 1935 readMemberAttrs(v); 1936 return v; 1937 } 1938 1939 /** Read a method. 1940 */ 1941 MethodSymbol readMethod() { 1942 long flags = adjustMethodFlags(nextChar()); 1943 Name name = readName(nextChar()); 1944 Type type = readType(nextChar()); 1945 if (currentOwner.isInterface() && 1946 (flags & ABSTRACT) == 0 && !name.equals(names.clinit)) { 1947 if (majorVersion > Target.JDK1_8.majorVersion || 1948 (majorVersion == Target.JDK1_8.majorVersion && minorVersion >= Target.JDK1_8.minorVersion)) { 1949 currentOwner.flags_field |= DEFAULT; 1950 flags |= DEFAULT | ABSTRACT; 1951 } else { 1952 //protect against ill-formed classfiles 1953 throw new CompletionFailure(currentOwner, "default method found in pre JDK 8 classfile"); 1954 } 1955 } 1956 if (name == names.init && currentOwner.hasOuterInstance()) { 1957 // Sometimes anonymous classes don't have an outer 1958 // instance, however, there is no reliable way to tell so 1959 // we never strip this$n 1960 if (!currentOwner.name.isEmpty()) 1961 type = new MethodType(adjustMethodParams(flags, type.getParameterTypes()), 1962 type.getReturnType(), 1963 type.getThrownTypes(), 1964 syms.methodClass); 1965 } 1966 MethodSymbol m = new MethodSymbol(flags, name, type, currentOwner); 1967 if (saveParameterNames) 1968 initParameterNames(m); 1969 Symbol prevOwner = currentOwner; 1970 currentOwner = m; 1971 try { 1972 readMemberAttrs(m); 1973 } finally { 1974 currentOwner = prevOwner; 1975 } 1976 if (saveParameterNames) 1977 setParameterNames(m, type); 1978 return m; 1979 } 1980 1981 private List<Type> adjustMethodParams(long flags, List<Type> args) { 1982 boolean isVarargs = (flags & VARARGS) != 0; 1983 if (isVarargs) { 1984 Type varargsElem = args.last(); 1985 ListBuffer<Type> adjustedArgs = ListBuffer.lb(); 1986 for (Type t : args) { 1987 adjustedArgs.append(t != varargsElem ? 1988 t : 1989 ((ArrayType)t).makeVarargs()); 1990 } 1991 args = adjustedArgs.toList(); 1992 } 1993 return args.tail; 1994 } 1995 1996 /** 1997 * Init the parameter names array. 1998 * Parameter names are currently inferred from the names in the 1999 * LocalVariableTable attributes of a Code attribute. 2000 * (Note: this means parameter names are currently not available for 2001 * methods without a Code attribute.) 2002 * This method initializes an array in which to store the name indexes 2003 * of parameter names found in LocalVariableTable attributes. It is 2004 * slightly supersized to allow for additional slots with a start_pc of 0. 2005 */ 2006 void initParameterNames(MethodSymbol sym) { 2007 // make allowance for synthetic parameters. 2008 final int excessSlots = 4; 2009 int expectedParameterSlots = 2010 Code.width(sym.type.getParameterTypes()) + excessSlots; 2011 if (parameterNameIndices == null 2012 || parameterNameIndices.length < expectedParameterSlots) { 2013 parameterNameIndices = new int[expectedParameterSlots]; 2014 } else 2015 Arrays.fill(parameterNameIndices, 0); 2016 haveParameterNameIndices = false; 2017 sawMethodParameters = false; 2018 } 2019 2020 /** 2021 * Set the parameter names for a symbol from the name index in the 2022 * parameterNameIndicies array. The type of the symbol may have changed 2023 * while reading the method attributes (see the Signature attribute). 2024 * This may be because of generic information or because anonymous 2025 * synthetic parameters were added. The original type (as read from 2026 * the method descriptor) is used to help guess the existence of 2027 * anonymous synthetic parameters. 2028 * On completion, sym.savedParameter names will either be null (if 2029 * no parameter names were found in the class file) or will be set to a 2030 * list of names, one per entry in sym.type.getParameterTypes, with 2031 * any missing names represented by the empty name. 2032 */ 2033 void setParameterNames(MethodSymbol sym, Type jvmType) { 2034 // if no names were found in the class file, there's nothing more to do 2035 if (!haveParameterNameIndices) 2036 return; 2037 // If we get parameter names from MethodParameters, then we 2038 // don't need to skip. 2039 int firstParam = 0; 2040 if (!sawMethodParameters) { 2041 firstParam = ((sym.flags() & STATIC) == 0) ? 1 : 0; 2042 // the code in readMethod may have skipped the first 2043 // parameter when setting up the MethodType. If so, we 2044 // make a corresponding allowance here for the position of 2045 // the first parameter. Note that this assumes the 2046 // skipped parameter has a width of 1 -- i.e. it is not 2047 // a double width type (long or double.) 2048 if (sym.name == names.init && currentOwner.hasOuterInstance()) { 2049 // Sometimes anonymous classes don't have an outer 2050 // instance, however, there is no reliable way to tell so 2051 // we never strip this$n 2052 if (!currentOwner.name.isEmpty()) 2053 firstParam += 1; 2054 } 2055 2056 if (sym.type != jvmType) { 2057 // reading the method attributes has caused the 2058 // symbol's type to be changed. (i.e. the Signature 2059 // attribute.) This may happen if there are hidden 2060 // (synthetic) parameters in the descriptor, but not 2061 // in the Signature. The position of these hidden 2062 // parameters is unspecified; for now, assume they are 2063 // at the beginning, and so skip over them. The 2064 // primary case for this is two hidden parameters 2065 // passed into Enum constructors. 2066 int skip = Code.width(jvmType.getParameterTypes()) 2067 - Code.width(sym.type.getParameterTypes()); 2068 firstParam += skip; 2069 } 2070 } 2071 List<Name> paramNames = List.nil(); 2072 int index = firstParam; 2073 for (Type t: sym.type.getParameterTypes()) { 2074 int nameIdx = (index < parameterNameIndices.length 2075 ? parameterNameIndices[index] : 0); 2076 Name name = nameIdx == 0 ? names.empty : readName(nameIdx); 2077 paramNames = paramNames.prepend(name); 2078 index += Code.width(t); 2079 } 2080 sym.savedParameterNames = paramNames.reverse(); 2081 } 2082 2083 /** 2084 * skip n bytes 2085 */ 2086 void skipBytes(int n) { 2087 bp = bp + n; 2088 } 2089 2090 /** Skip a field or method 2091 */ 2092 void skipMember() { 2093 bp = bp + 6; 2094 char ac = nextChar(); 2095 for (int i = 0; i < ac; i++) { 2096 bp = bp + 2; 2097 int attrLen = nextInt(); 2098 bp = bp + attrLen; 2099 } 2100 } 2101 2102 /** Enter type variables of this classtype and all enclosing ones in 2103 * `typevars'. 2104 */ 2105 protected void enterTypevars(Type t) { 2106 if (t.getEnclosingType() != null && t.getEnclosingType().hasTag(CLASS)) 2107 enterTypevars(t.getEnclosingType()); 2108 for (List<Type> xs = t.getTypeArguments(); xs.nonEmpty(); xs = xs.tail) 2109 typevars.enter(xs.head.tsym); 2110 } 2111 2112 protected void enterTypevars(Symbol sym) { 2113 if (sym.owner.kind == MTH) { 2114 enterTypevars(sym.owner); 2115 enterTypevars(sym.owner.owner); 2116 } 2117 enterTypevars(sym.type); 2118 } 2119 2120 /** Read contents of a given class symbol `c'. Both external and internal 2121 * versions of an inner class are read. 2122 */ 2123 void readClass(ClassSymbol c) { 2124 ClassType ct = (ClassType)c.type; 2125 2126 // allocate scope for members 2127 c.members_field = new Scope(c); 2128 2129 // prepare type variable table 2130 typevars = typevars.dup(currentOwner); 2131 if (ct.getEnclosingType().hasTag(CLASS)) 2132 enterTypevars(ct.getEnclosingType()); 2133 2134 // read flags, or skip if this is an inner class 2135 long flags = adjustClassFlags(nextChar()); 2136 if (c.owner.kind == PCK) c.flags_field = flags; 2137 2138 // read own class name and check that it matches 2139 ClassSymbol self = readClassSymbol(nextChar()); 2140 if (c != self) 2141 throw badClassFile("class.file.wrong.class", 2142 self.flatname); 2143 2144 // class attributes must be read before class 2145 // skip ahead to read class attributes 2146 int startbp = bp; 2147 nextChar(); 2148 char interfaceCount = nextChar(); 2149 bp += interfaceCount * 2; 2150 char fieldCount = nextChar(); 2151 for (int i = 0; i < fieldCount; i++) skipMember(); 2152 char methodCount = nextChar(); 2153 for (int i = 0; i < methodCount; i++) skipMember(); 2154 readClassAttrs(c); 2155 2156 if (readAllOfClassFile) { 2157 for (int i = 1; i < poolObj.length; i++) readPool(i); 2158 c.pool = new Pool(poolObj.length, poolObj, types); 2159 } 2160 2161 // reset and read rest of classinfo 2162 bp = startbp; 2163 int n = nextChar(); 2164 if (ct.supertype_field == null) 2165 ct.supertype_field = (n == 0) 2166 ? Type.noType 2167 : readClassSymbol(n).erasure(types); 2168 n = nextChar(); 2169 List<Type> is = List.nil(); 2170 for (int i = 0; i < n; i++) { 2171 Type _inter = readClassSymbol(nextChar()).erasure(types); 2172 is = is.prepend(_inter); 2173 } 2174 if (ct.interfaces_field == null) 2175 ct.interfaces_field = is.reverse(); 2176 2177 Assert.check(fieldCount == nextChar()); 2178 for (int i = 0; i < fieldCount; i++) enterMember(c, readField()); 2179 Assert.check(methodCount == nextChar()); 2180 for (int i = 0; i < methodCount; i++) enterMember(c, readMethod()); 2181 2182 typevars = typevars.leave(); 2183 } 2184 2185 /** Read inner class info. For each inner/outer pair allocate a 2186 * member class. 2187 */ 2188 void readInnerClasses(ClassSymbol c) { 2189 int n = nextChar(); 2190 for (int i = 0; i < n; i++) { 2191 nextChar(); // skip inner class symbol 2192 ClassSymbol outer = readClassSymbol(nextChar()); 2193 Name name = readName(nextChar()); 2194 if (name == null) name = names.empty; 2195 long flags = adjustClassFlags(nextChar()); 2196 if (outer != null) { // we have a member class 2197 if (name == names.empty) 2198 name = names.one; 2199 ClassSymbol member = enterClass(name, outer); 2200 if ((flags & STATIC) == 0) { 2201 ((ClassType)member.type).setEnclosingType(outer.type); 2202 if (member.erasure_field != null) 2203 ((ClassType)member.erasure_field).setEnclosingType(types.erasure(outer.type)); 2204 } 2205 if (c == outer) { 2206 member.flags_field = flags; 2207 enterMember(c, member); 2208 } 2209 } 2210 } 2211 } 2212 2213 /** Read a class file. 2214 */ 2215 private void readClassFile(ClassSymbol c) throws IOException { 2216 int magic = nextInt(); 2217 if (magic != JAVA_MAGIC) 2218 throw badClassFile("illegal.start.of.class.file"); 2219 2220 minorVersion = nextChar(); 2221 majorVersion = nextChar(); 2222 int maxMajor = Target.MAX().majorVersion; 2223 int maxMinor = Target.MAX().minorVersion; 2224 if (majorVersion > maxMajor || 2225 majorVersion * 1000 + minorVersion < 2226 Target.MIN().majorVersion * 1000 + Target.MIN().minorVersion) 2227 { 2228 if (majorVersion == (maxMajor + 1)) 2229 log.warning("big.major.version", 2230 currentClassFile, 2231 majorVersion, 2232 maxMajor); 2233 else 2234 throw badClassFile("wrong.version", 2235 Integer.toString(majorVersion), 2236 Integer.toString(minorVersion), 2237 Integer.toString(maxMajor), 2238 Integer.toString(maxMinor)); 2239 } 2240 else if (checkClassFile && 2241 majorVersion == maxMajor && 2242 minorVersion > maxMinor) 2243 { 2244 printCCF("found.later.version", 2245 Integer.toString(minorVersion)); 2246 } 2247 indexPool(); 2248 if (signatureBuffer.length < bp) { 2249 int ns = Integer.highestOneBit(bp) << 1; 2250 signatureBuffer = new byte[ns]; 2251 } 2252 readClass(c); 2253 } 2254 2255 /************************************************************************ 2256 * Adjusting flags 2257 ***********************************************************************/ 2258 2259 long adjustFieldFlags(long flags) { 2260 return flags; 2261 } 2262 long adjustMethodFlags(long flags) { 2263 if ((flags & ACC_BRIDGE) != 0) { 2264 flags &= ~ACC_BRIDGE; 2265 flags |= BRIDGE; 2266 if (!allowGenerics) 2267 flags &= ~SYNTHETIC; 2268 } 2269 if ((flags & ACC_VARARGS) != 0) { 2270 flags &= ~ACC_VARARGS; 2271 flags |= VARARGS; 2272 } 2273 return flags; 2274 } 2275 long adjustClassFlags(long flags) { 2276 return flags & ~ACC_SUPER; // SUPER and SYNCHRONIZED bits overloaded 2277 } 2278 2279 /************************************************************************ 2280 * Loading Classes 2281 ***********************************************************************/ 2282 2283 /** Define a new class given its name and owner. 2284 */ 2285 public ClassSymbol defineClass(Name name, Symbol owner) { 2286 ClassSymbol c = new ClassSymbol(0, name, owner); 2287 if (owner.kind == PCK) 2288 Assert.checkNull(classes.get(c.flatname), c); 2289 c.completer = this; 2290 return c; 2291 } 2292 2293 /** Create a new toplevel or member class symbol with given name 2294 * and owner and enter in `classes' unless already there. 2295 */ 2296 public ClassSymbol enterClass(Name name, TypeSymbol owner) { 2297 Name flatname = TypeSymbol.formFlatName(name, owner); 2298 ClassSymbol c = classes.get(flatname); 2299 if (c == null) { 2300 c = defineClass(name, owner); 2301 classes.put(flatname, c); 2302 } else if ((c.name != name || c.owner != owner) && owner.kind == TYP && c.owner.kind == PCK) { 2303 // reassign fields of classes that might have been loaded with 2304 // their flat names. 2305 c.owner.members().remove(c); 2306 c.name = name; 2307 c.owner = owner; 2308 c.fullname = ClassSymbol.formFullName(name, owner); 2309 } 2310 return c; 2311 } 2312 2313 /** 2314 * Creates a new toplevel class symbol with given flat name and 2315 * given class (or source) file. 2316 * 2317 * @param flatName a fully qualified binary class name 2318 * @param classFile the class file or compilation unit defining 2319 * the class (may be {@code null}) 2320 * @return a newly created class symbol 2321 * @throws AssertionError if the class symbol already exists 2322 */ 2323 public ClassSymbol enterClass(Name flatName, JavaFileObject classFile) { 2324 ClassSymbol cs = classes.get(flatName); 2325 if (cs != null) { 2326 String msg = Log.format("%s: completer = %s; class file = %s; source file = %s", 2327 cs.fullname, 2328 cs.completer, 2329 cs.classfile, 2330 cs.sourcefile); 2331 throw new AssertionError(msg); 2332 } 2333 Name packageName = Convert.packagePart(flatName); 2334 PackageSymbol owner = packageName.isEmpty() 2335 ? syms.unnamedPackage 2336 : enterPackage(packageName); 2337 cs = defineClass(Convert.shortName(flatName), owner); 2338 cs.classfile = classFile; 2339 classes.put(flatName, cs); 2340 return cs; 2341 } 2342 2343 /** Create a new member or toplevel class symbol with given flat name 2344 * and enter in `classes' unless already there. 2345 */ 2346 public ClassSymbol enterClass(Name flatname) { 2347 ClassSymbol c = classes.get(flatname); 2348 if (c == null) 2349 return enterClass(flatname, (JavaFileObject)null); 2350 else 2351 return c; 2352 } 2353 2354 private boolean suppressFlush = false; 2355 2356 /** Completion for classes to be loaded. Before a class is loaded 2357 * we make sure its enclosing class (if any) is loaded. 2358 */ 2359 public void complete(Symbol sym) throws CompletionFailure { 2360 if (sym.kind == TYP) { 2361 ClassSymbol c = (ClassSymbol)sym; 2362 c.members_field = new Scope.ErrorScope(c); // make sure it's always defined 2363 boolean saveSuppressFlush = suppressFlush; 2364 suppressFlush = true; 2365 try { 2366 completeOwners(c.owner); 2367 completeEnclosing(c); 2368 } finally { 2369 suppressFlush = saveSuppressFlush; 2370 } 2371 fillIn(c); 2372 } else if (sym.kind == PCK) { 2373 PackageSymbol p = (PackageSymbol)sym; 2374 try { 2375 fillIn(p); 2376 } catch (IOException ex) { 2377 throw new CompletionFailure(sym, ex.getLocalizedMessage()).initCause(ex); 2378 } 2379 } 2380 if (!filling && !suppressFlush) 2381 annotate.flush(); // finish attaching annotations 2382 } 2383 2384 /** complete up through the enclosing package. */ 2385 private void completeOwners(Symbol o) { 2386 if (o.kind != PCK) completeOwners(o.owner); 2387 o.complete(); 2388 } 2389 2390 /** 2391 * Tries to complete lexically enclosing classes if c looks like a 2392 * nested class. This is similar to completeOwners but handles 2393 * the situation when a nested class is accessed directly as it is 2394 * possible with the Tree API or javax.lang.model.*. 2395 */ 2396 private void completeEnclosing(ClassSymbol c) { 2397 if (c.owner.kind == PCK) { 2398 Symbol owner = c.owner; 2399 for (Name name : Convert.enclosingCandidates(Convert.shortName(c.name))) { 2400 Symbol encl = owner.members().lookup(name).sym; 2401 if (encl == null) 2402 encl = classes.get(TypeSymbol.formFlatName(name, owner)); 2403 if (encl != null) 2404 encl.complete(); 2405 } 2406 } 2407 } 2408 2409 /** We can only read a single class file at a time; this 2410 * flag keeps track of when we are currently reading a class 2411 * file. 2412 */ 2413 private boolean filling = false; 2414 2415 /** Fill in definition of class `c' from corresponding class or 2416 * source file. 2417 */ 2418 private void fillIn(ClassSymbol c) { 2419 if (completionFailureName == c.fullname) { 2420 throw new CompletionFailure(c, "user-selected completion failure by class name"); 2421 } 2422 currentOwner = c; 2423 warnedAttrs.clear(); 2424 JavaFileObject classfile = c.classfile; 2425 if (classfile != null) { 2426 JavaFileObject previousClassFile = currentClassFile; 2427 try { 2428 if (filling) { 2429 Assert.error("Filling " + classfile.toUri() + " during " + previousClassFile); 2430 } 2431 currentClassFile = classfile; 2432 if (verbose) { 2433 log.printVerbose("loading", currentClassFile.toString()); 2434 } 2435 if (classfile.getKind() == JavaFileObject.Kind.CLASS) { 2436 filling = true; 2437 try { 2438 bp = 0; 2439 buf = readInputStream(buf, classfile.openInputStream()); 2440 readClassFile(c); 2441 if (!missingTypeVariables.isEmpty() && !foundTypeVariables.isEmpty()) { 2442 List<Type> missing = missingTypeVariables; 2443 List<Type> found = foundTypeVariables; 2444 missingTypeVariables = List.nil(); 2445 foundTypeVariables = List.nil(); 2446 filling = false; 2447 ClassType ct = (ClassType)currentOwner.type; 2448 ct.supertype_field = 2449 types.subst(ct.supertype_field, missing, found); 2450 ct.interfaces_field = 2451 types.subst(ct.interfaces_field, missing, found); 2452 } else if (missingTypeVariables.isEmpty() != 2453 foundTypeVariables.isEmpty()) { 2454 Name name = missingTypeVariables.head.tsym.name; 2455 throw badClassFile("undecl.type.var", name); 2456 } 2457 } finally { 2458 missingTypeVariables = List.nil(); 2459 foundTypeVariables = List.nil(); 2460 filling = false; 2461 } 2462 } else { 2463 if (sourceCompleter != null) { 2464 sourceCompleter.complete(c); 2465 } else { 2466 throw new IllegalStateException("Source completer required to read " 2467 + classfile.toUri()); 2468 } 2469 } 2470 return; 2471 } catch (IOException ex) { 2472 throw badClassFile("unable.to.access.file", ex.getMessage()); 2473 } finally { 2474 currentClassFile = previousClassFile; 2475 } 2476 } else { 2477 JCDiagnostic diag = 2478 diagFactory.fragment("class.file.not.found", c.flatname); 2479 throw 2480 newCompletionFailure(c, diag); 2481 } 2482 } 2483 // where 2484 private static byte[] readInputStream(byte[] buf, InputStream s) throws IOException { 2485 try { 2486 buf = ensureCapacity(buf, s.available()); 2487 int r = s.read(buf); 2488 int bp = 0; 2489 while (r != -1) { 2490 bp += r; 2491 buf = ensureCapacity(buf, bp); 2492 r = s.read(buf, bp, buf.length - bp); 2493 } 2494 return buf; 2495 } finally { 2496 try { 2497 s.close(); 2498 } catch (IOException e) { 2499 /* Ignore any errors, as this stream may have already 2500 * thrown a related exception which is the one that 2501 * should be reported. 2502 */ 2503 } 2504 } 2505 } 2506 /* 2507 * ensureCapacity will increase the buffer as needed, taking note that 2508 * the new buffer will always be greater than the needed and never 2509 * exactly equal to the needed size or bp. If equal then the read (above) 2510 * will infinitely loop as buf.length - bp == 0. 2511 */ 2512 private static byte[] ensureCapacity(byte[] buf, int needed) { 2513 if (buf.length <= needed) { 2514 byte[] old = buf; 2515 buf = new byte[Integer.highestOneBit(needed) << 1]; 2516 System.arraycopy(old, 0, buf, 0, old.length); 2517 } 2518 return buf; 2519 } 2520 /** Static factory for CompletionFailure objects. 2521 * In practice, only one can be used at a time, so we share one 2522 * to reduce the expense of allocating new exception objects. 2523 */ 2524 private CompletionFailure newCompletionFailure(TypeSymbol c, 2525 JCDiagnostic diag) { 2526 if (!cacheCompletionFailure) { 2527 // log.warning("proc.messager", 2528 // Log.getLocalizedString("class.file.not.found", c.flatname)); 2529 // c.debug.printStackTrace(); 2530 return new CompletionFailure(c, diag); 2531 } else { 2532 CompletionFailure result = cachedCompletionFailure; 2533 result.sym = c; 2534 result.diag = diag; 2535 return result; 2536 } 2537 } 2538 private CompletionFailure cachedCompletionFailure = 2539 new CompletionFailure(null, (JCDiagnostic) null); 2540 { 2541 cachedCompletionFailure.setStackTrace(new StackTraceElement[0]); 2542 } 2543 2544 /** Load a toplevel class with given fully qualified name 2545 * The class is entered into `classes' only if load was successful. 2546 */ 2547 public ClassSymbol loadClass(Name flatname) throws CompletionFailure { 2548 boolean absent = classes.get(flatname) == null; 2549 ClassSymbol c = enterClass(flatname); 2550 if (c.members_field == null && c.completer != null) { 2551 try { 2552 c.complete(); 2553 } catch (CompletionFailure ex) { 2554 if (absent) classes.remove(flatname); 2555 throw ex; 2556 } 2557 } 2558 return c; 2559 } 2560 2561 /************************************************************************ 2562 * Loading Packages 2563 ***********************************************************************/ 2564 2565 /** Check to see if a package exists, given its fully qualified name. 2566 */ 2567 public boolean packageExists(Name fullname) { 2568 return enterPackage(fullname).exists(); 2569 } 2570 2571 /** Make a package, given its fully qualified name. 2572 */ 2573 public PackageSymbol enterPackage(Name fullname) { 2574 PackageSymbol p = packages.get(fullname); 2575 if (p == null) { 2576 Assert.check(!fullname.isEmpty(), "rootPackage missing!"); 2577 p = new PackageSymbol( 2578 Convert.shortName(fullname), 2579 enterPackage(Convert.packagePart(fullname))); 2580 p.completer = this; 2581 packages.put(fullname, p); 2582 } 2583 return p; 2584 } 2585 2586 /** Make a package, given its unqualified name and enclosing package. 2587 */ 2588 public PackageSymbol enterPackage(Name name, PackageSymbol owner) { 2589 return enterPackage(TypeSymbol.formFullName(name, owner)); 2590 } 2591 2592 /** Include class corresponding to given class file in package, 2593 * unless (1) we already have one the same kind (.class or .java), or 2594 * (2) we have one of the other kind, and the given class file 2595 * is older. 2596 */ 2597 protected void includeClassFile(PackageSymbol p, JavaFileObject file) { 2598 if ((p.flags_field & EXISTS) == 0) 2599 for (Symbol q = p; q != null && q.kind == PCK; q = q.owner) 2600 q.flags_field |= EXISTS; 2601 JavaFileObject.Kind kind = file.getKind(); 2602 int seen; 2603 if (kind == JavaFileObject.Kind.CLASS) 2604 seen = CLASS_SEEN; 2605 else 2606 seen = SOURCE_SEEN; 2607 String binaryName = fileManager.inferBinaryName(currentLoc, file); 2608 int lastDot = binaryName.lastIndexOf("."); 2609 Name classname = names.fromString(binaryName.substring(lastDot + 1)); 2610 boolean isPkgInfo = classname == names.package_info; 2611 ClassSymbol c = isPkgInfo 2612 ? p.package_info 2613 : (ClassSymbol) p.members_field.lookup(classname).sym; 2614 if (c == null) { 2615 c = enterClass(classname, p); 2616 if (c.classfile == null) // only update the file if's it's newly created 2617 c.classfile = file; 2618 if (isPkgInfo) { 2619 p.package_info = c; 2620 } else { 2621 if (c.owner == p) // it might be an inner class 2622 p.members_field.enter(c); 2623 } 2624 } else if (c.classfile != null && (c.flags_field & seen) == 0) { 2625 // if c.classfile == null, we are currently compiling this class 2626 // and no further action is necessary. 2627 // if (c.flags_field & seen) != 0, we have already encountered 2628 // a file of the same kind; again no further action is necessary. 2629 if ((c.flags_field & (CLASS_SEEN | SOURCE_SEEN)) != 0) 2630 c.classfile = preferredFileObject(file, c.classfile); 2631 } 2632 c.flags_field |= seen; 2633 } 2634 2635 /** Implement policy to choose to derive information from a source 2636 * file or a class file when both are present. May be overridden 2637 * by subclasses. 2638 */ 2639 protected JavaFileObject preferredFileObject(JavaFileObject a, 2640 JavaFileObject b) { 2641 2642 if (preferSource) 2643 return (a.getKind() == JavaFileObject.Kind.SOURCE) ? a : b; 2644 else { 2645 long adate = a.getLastModified(); 2646 long bdate = b.getLastModified(); 2647 // 6449326: policy for bad lastModifiedTime in ClassReader 2648 //assert adate >= 0 && bdate >= 0; 2649 return (adate > bdate) ? a : b; 2650 } 2651 } 2652 2653 /** 2654 * specifies types of files to be read when filling in a package symbol 2655 */ 2656 protected EnumSet<JavaFileObject.Kind> getPackageFileKinds() { 2657 return EnumSet.of(JavaFileObject.Kind.CLASS, JavaFileObject.Kind.SOURCE); 2658 } 2659 2660 /** 2661 * this is used to support javadoc 2662 */ 2663 protected void extraFileActions(PackageSymbol pack, JavaFileObject fe) { 2664 } 2665 2666 protected Location currentLoc; // FIXME 2667 2668 private boolean verbosePath = true; 2669 2670 /** Load directory of package into members scope. 2671 */ 2672 private void fillIn(PackageSymbol p) throws IOException { 2673 if (p.members_field == null) p.members_field = new Scope(p); 2674 String packageName = p.fullname.toString(); 2675 2676 Set<JavaFileObject.Kind> kinds = getPackageFileKinds(); 2677 2678 fillIn(p, PLATFORM_CLASS_PATH, 2679 fileManager.list(PLATFORM_CLASS_PATH, 2680 packageName, 2681 EnumSet.of(JavaFileObject.Kind.CLASS), 2682 false)); 2683 2684 Set<JavaFileObject.Kind> classKinds = EnumSet.copyOf(kinds); 2685 classKinds.remove(JavaFileObject.Kind.SOURCE); 2686 boolean wantClassFiles = !classKinds.isEmpty(); 2687 2688 Set<JavaFileObject.Kind> sourceKinds = EnumSet.copyOf(kinds); 2689 sourceKinds.remove(JavaFileObject.Kind.CLASS); 2690 boolean wantSourceFiles = !sourceKinds.isEmpty(); 2691 2692 boolean haveSourcePath = fileManager.hasLocation(SOURCE_PATH); 2693 2694 if (verbose && verbosePath) { 2695 if (fileManager instanceof StandardJavaFileManager) { 2696 StandardJavaFileManager fm = (StandardJavaFileManager)fileManager; 2697 if (haveSourcePath && wantSourceFiles) { 2698 List<File> path = List.nil(); 2699 for (File file : fm.getLocation(SOURCE_PATH)) { 2700 path = path.prepend(file); 2701 } 2702 log.printVerbose("sourcepath", path.reverse().toString()); 2703 } else if (wantSourceFiles) { 2704 List<File> path = List.nil(); 2705 for (File file : fm.getLocation(CLASS_PATH)) { 2706 path = path.prepend(file); 2707 } 2708 log.printVerbose("sourcepath", path.reverse().toString()); 2709 } 2710 if (wantClassFiles) { 2711 List<File> path = List.nil(); 2712 for (File file : fm.getLocation(PLATFORM_CLASS_PATH)) { 2713 path = path.prepend(file); 2714 } 2715 for (File file : fm.getLocation(CLASS_PATH)) { 2716 path = path.prepend(file); 2717 } 2718 log.printVerbose("classpath", path.reverse().toString()); 2719 } 2720 } 2721 } 2722 2723 if (wantSourceFiles && !haveSourcePath) { 2724 fillIn(p, CLASS_PATH, 2725 fileManager.list(CLASS_PATH, 2726 packageName, 2727 kinds, 2728 false)); 2729 } else { 2730 if (wantClassFiles) 2731 fillIn(p, CLASS_PATH, 2732 fileManager.list(CLASS_PATH, 2733 packageName, 2734 classKinds, 2735 false)); 2736 if (wantSourceFiles) 2737 fillIn(p, SOURCE_PATH, 2738 fileManager.list(SOURCE_PATH, 2739 packageName, 2740 sourceKinds, 2741 false)); 2742 } 2743 verbosePath = false; 2744 } 2745 // where 2746 private void fillIn(PackageSymbol p, 2747 Location location, 2748 Iterable<JavaFileObject> files) 2749 { 2750 currentLoc = location; 2751 for (JavaFileObject fo : files) { 2752 switch (fo.getKind()) { 2753 case CLASS: 2754 case SOURCE: { 2755 // TODO pass binaryName to includeClassFile 2756 String binaryName = fileManager.inferBinaryName(currentLoc, fo); 2757 String simpleName = binaryName.substring(binaryName.lastIndexOf(".") + 1); 2758 if (SourceVersion.isIdentifier(simpleName) || 2759 simpleName.equals("package-info")) 2760 includeClassFile(p, fo); 2761 break; 2762 } 2763 default: 2764 extraFileActions(p, fo); 2765 } 2766 } 2767 } 2768 2769 /** Output for "-checkclassfile" option. 2770 * @param key The key to look up the correct internationalized string. 2771 * @param arg An argument for substitution into the output string. 2772 */ 2773 private void printCCF(String key, Object arg) { 2774 log.printLines(key, arg); 2775 } 2776 2777 2778 public interface SourceCompleter { 2779 void complete(ClassSymbol sym) 2780 throws CompletionFailure; 2781 } 2782 2783 /** 2784 * A subclass of JavaFileObject for the sourcefile attribute found in a classfile. 2785 * The attribute is only the last component of the original filename, so is unlikely 2786 * to be valid as is, so operations other than those to access the name throw 2787 * UnsupportedOperationException 2788 */ 2789 private static class SourceFileObject extends BaseFileObject { 2790 2791 /** The file's name. 2792 */ 2793 private Name name; 2794 private Name flatname; 2795 2796 public SourceFileObject(Name name, Name flatname) { 2797 super(null); // no file manager; never referenced for this file object 2798 this.name = name; 2799 this.flatname = flatname; 2800 } 2801 2802 @Override 2803 public URI toUri() { 2804 try { 2805 return new URI(null, name.toString(), null); 2806 } catch (URISyntaxException e) { 2807 throw new CannotCreateUriError(name.toString(), e); 2808 } 2809 } 2810 2811 @Override 2812 public String getName() { 2813 return name.toString(); 2814 } 2815 2816 @Override 2817 public String getShortName() { 2818 return getName(); 2819 } 2820 2821 @Override 2822 public JavaFileObject.Kind getKind() { 2823 return getKind(getName()); 2824 } 2825 2826 @Override 2827 public InputStream openInputStream() { 2828 throw new UnsupportedOperationException(); 2829 } 2830 2831 @Override 2832 public OutputStream openOutputStream() { 2833 throw new UnsupportedOperationException(); 2834 } 2835 2836 @Override 2837 public CharBuffer getCharContent(boolean ignoreEncodingErrors) { 2838 throw new UnsupportedOperationException(); 2839 } 2840 2841 @Override 2842 public Reader openReader(boolean ignoreEncodingErrors) { 2843 throw new UnsupportedOperationException(); 2844 } 2845 2846 @Override 2847 public Writer openWriter() { 2848 throw new UnsupportedOperationException(); 2849 } 2850 2851 @Override 2852 public long getLastModified() { 2853 throw new UnsupportedOperationException(); 2854 } 2855 2856 @Override 2857 public boolean delete() { 2858 throw new UnsupportedOperationException(); 2859 } 2860 2861 @Override 2862 protected String inferBinaryName(Iterable<? extends File> path) { 2863 return flatname.toString(); 2864 } 2865 2866 @Override 2867 public boolean isNameCompatible(String simpleName, JavaFileObject.Kind kind) { 2868 return true; // fail-safe mode 2869 } 2870 2871 /** 2872 * Check if two file objects are equal. 2873 * SourceFileObjects are just placeholder objects for the value of a 2874 * SourceFile attribute, and do not directly represent specific files. 2875 * Two SourceFileObjects are equal if their names are equal. 2876 */ 2877 @Override 2878 public boolean equals(Object other) { 2879 if (this == other) 2880 return true; 2881 2882 if (!(other instanceof SourceFileObject)) 2883 return false; 2884 2885 SourceFileObject o = (SourceFileObject) other; 2886 return name.equals(o.name); 2887 } 2888 2889 @Override 2890 public int hashCode() { 2891 return name.hashCode(); 2892 } 2893 } 2894 }