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src/share/classes/com/sun/tools/javac/jvm/ClassReader.java@fb870c70e774
src/share/classes/com/sun/tools/javac/jvm/ClassReader.java
Thu, 06 Feb 2014 21:03:03 +0000
- author
- vromero
- date
- Thu, 06 Feb 2014 21:03:03 +0000
- changeset 2260
- fb870c70e774
- parent 2136
- 7f6481e5fe3a
- child 2375
- 3a2ebbad5911
- permissions
- -rw-r--r--
8029240: Default methods not always visible under -source 7
Reviewed-by: jjg
1 /*
2 * Copyright (c) 1999, 2014, 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 */
26 package com.sun.tools.javac.jvm;
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;
44 import static javax.tools.StandardLocation.*;
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;
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.code.TypeTag.TYPEVAR;
60 import static com.sun.tools.javac.jvm.ClassFile.*;
61 import static com.sun.tools.javac.jvm.ClassFile.Version.*;
63 import static com.sun.tools.javac.main.Option.*;
65 /** This class provides operations to read a classfile into an internal
66 * representation. The internal representation is anchored in a
67 * ClassSymbol which contains in its scope symbol representations
68 * for all other definitions in the classfile. Top-level Classes themselves
69 * appear as members of the scopes of PackageSymbols.
70 *
71 * <p><b>This is NOT part of any supported API.
72 * If you write code that depends on this, you do so at your own risk.
73 * This code and its internal interfaces are subject to change or
74 * deletion without notice.</b>
75 */
76 public class ClassReader {
77 /** The context key for the class reader. */
78 protected static final Context.Key<ClassReader> classReaderKey =
79 new Context.Key<ClassReader>();
81 public static final int INITIAL_BUFFER_SIZE = 0x0fff0;
83 Annotate annotate;
85 /** Switch: verbose output.
86 */
87 boolean verbose;
89 /** Switch: check class file for correct minor version, unrecognized
90 * attributes.
91 */
92 boolean checkClassFile;
94 /** Switch: read constant pool and code sections. This switch is initially
95 * set to false but can be turned on from outside.
96 */
97 public boolean readAllOfClassFile = false;
99 /** Switch: read GJ signature information.
100 */
101 boolean allowGenerics;
103 /** Switch: read varargs attribute.
104 */
105 boolean allowVarargs;
107 /** Switch: allow annotations.
108 */
109 boolean allowAnnotations;
111 /** Switch: allow simplified varargs.
112 */
113 boolean allowSimplifiedVarargs;
115 /** Lint option: warn about classfile issues
116 */
117 boolean lintClassfile;
119 /** Switch: preserve parameter names from the variable table.
120 */
121 public boolean saveParameterNames;
123 /**
124 * Switch: cache completion failures unless -XDdev is used
125 */
126 private boolean cacheCompletionFailure;
128 /**
129 * Switch: prefer source files instead of newer when both source
130 * and class are available
131 **/
132 public boolean preferSource;
134 /**
135 * The currently selected profile.
136 */
137 public final Profile profile;
139 /** The log to use for verbose output
140 */
141 final Log log;
143 /** The symbol table. */
144 Symtab syms;
146 Types types;
148 /** The name table. */
149 final Names names;
151 /** Force a completion failure on this name
152 */
153 final Name completionFailureName;
155 /** Access to files
156 */
157 private final JavaFileManager fileManager;
159 /** Factory for diagnostics
160 */
161 JCDiagnostic.Factory diagFactory;
163 /** Can be reassigned from outside:
164 * the completer to be used for ".java" files. If this remains unassigned
165 * ".java" files will not be loaded.
166 */
167 public SourceCompleter sourceCompleter = null;
169 /** A hashtable containing the encountered top-level and member classes,
170 * indexed by flat names. The table does not contain local classes.
171 */
172 private Map<Name,ClassSymbol> classes;
174 /** A hashtable containing the encountered packages.
175 */
176 private Map<Name, PackageSymbol> packages;
178 /** The current scope where type variables are entered.
179 */
180 protected Scope typevars;
182 /** The path name of the class file currently being read.
183 */
184 protected JavaFileObject currentClassFile = null;
186 /** The class or method currently being read.
187 */
188 protected Symbol currentOwner = null;
190 /** The buffer containing the currently read class file.
191 */
192 byte[] buf = new byte[INITIAL_BUFFER_SIZE];
194 /** The current input pointer.
195 */
196 protected int bp;
198 /** The objects of the constant pool.
199 */
200 Object[] poolObj;
202 /** For every constant pool entry, an index into buf where the
203 * defining section of the entry is found.
204 */
205 int[] poolIdx;
207 /** The major version number of the class file being read. */
208 int majorVersion;
209 /** The minor version number of the class file being read. */
210 int minorVersion;
212 /** A table to hold the constant pool indices for method parameter
213 * names, as given in LocalVariableTable attributes.
214 */
215 int[] parameterNameIndices;
217 /**
218 * Whether or not any parameter names have been found.
219 */
220 boolean haveParameterNameIndices;
222 /** Set this to false every time we start reading a method
223 * and are saving parameter names. Set it to true when we see
224 * MethodParameters, if it's set when we see a LocalVariableTable,
225 * then we ignore the parameter names from the LVT.
226 */
227 boolean sawMethodParameters;
229 /**
230 * The set of attribute names for which warnings have been generated for the current class
231 */
232 Set<Name> warnedAttrs = new HashSet<Name>();
234 /**
235 * Completer that delegates to the complete-method of this class.
236 */
237 private final Completer thisCompleter = new Completer() {
238 @Override
239 public void complete(Symbol sym) throws CompletionFailure {
240 ClassReader.this.complete(sym);
241 }
242 };
245 /** Get the ClassReader instance for this invocation. */
246 public static ClassReader instance(Context context) {
247 ClassReader instance = context.get(classReaderKey);
248 if (instance == null)
249 instance = new ClassReader(context, true);
250 return instance;
251 }
253 /** Initialize classes and packages, treating this as the definitive classreader. */
254 public void init(Symtab syms) {
255 init(syms, true);
256 }
258 /** Initialize classes and packages, optionally treating this as
259 * the definitive classreader.
260 */
261 private void init(Symtab syms, boolean definitive) {
262 if (classes != null) return;
264 if (definitive) {
265 Assert.check(packages == null || packages == syms.packages);
266 packages = syms.packages;
267 Assert.check(classes == null || classes == syms.classes);
268 classes = syms.classes;
269 } else {
270 packages = new HashMap<Name, PackageSymbol>();
271 classes = new HashMap<Name, ClassSymbol>();
272 }
274 packages.put(names.empty, syms.rootPackage);
275 syms.rootPackage.completer = thisCompleter;
276 syms.unnamedPackage.completer = thisCompleter;
277 }
279 /** Construct a new class reader, optionally treated as the
280 * definitive classreader for this invocation.
281 */
282 protected ClassReader(Context context, boolean definitive) {
283 if (definitive) context.put(classReaderKey, this);
285 names = Names.instance(context);
286 syms = Symtab.instance(context);
287 types = Types.instance(context);
288 fileManager = context.get(JavaFileManager.class);
289 if (fileManager == null)
290 throw new AssertionError("FileManager initialization error");
291 diagFactory = JCDiagnostic.Factory.instance(context);
293 init(syms, definitive);
294 log = Log.instance(context);
296 Options options = Options.instance(context);
297 annotate = Annotate.instance(context);
298 verbose = options.isSet(VERBOSE);
299 checkClassFile = options.isSet("-checkclassfile");
301 Source source = Source.instance(context);
302 allowGenerics = source.allowGenerics();
303 allowVarargs = source.allowVarargs();
304 allowAnnotations = source.allowAnnotations();
305 allowSimplifiedVarargs = source.allowSimplifiedVarargs();
307 saveParameterNames = options.isSet("save-parameter-names");
308 cacheCompletionFailure = options.isUnset("dev");
309 preferSource = "source".equals(options.get("-Xprefer"));
311 profile = Profile.instance(context);
313 completionFailureName =
314 options.isSet("failcomplete")
315 ? names.fromString(options.get("failcomplete"))
316 : null;
318 typevars = new Scope(syms.noSymbol);
320 lintClassfile = Lint.instance(context).isEnabled(LintCategory.CLASSFILE);
322 initAttributeReaders();
323 }
325 /** Add member to class unless it is synthetic.
326 */
327 private void enterMember(ClassSymbol c, Symbol sym) {
328 // Synthetic members are not entered -- reason lost to history (optimization?).
329 // Lambda methods must be entered because they may have inner classes (which reference them)
330 if ((sym.flags_field & (SYNTHETIC|BRIDGE)) != SYNTHETIC || sym.name.startsWith(names.lambda))
331 c.members_field.enter(sym);
332 }
334 /************************************************************************
335 * Error Diagnoses
336 ***********************************************************************/
339 public class BadClassFile extends CompletionFailure {
340 private static final long serialVersionUID = 0;
342 public BadClassFile(TypeSymbol sym, JavaFileObject file, JCDiagnostic diag) {
343 super(sym, createBadClassFileDiagnostic(file, diag));
344 }
345 }
346 // where
347 private JCDiagnostic createBadClassFileDiagnostic(JavaFileObject file, JCDiagnostic diag) {
348 String key = (file.getKind() == JavaFileObject.Kind.SOURCE
349 ? "bad.source.file.header" : "bad.class.file.header");
350 return diagFactory.fragment(key, file, diag);
351 }
353 public BadClassFile badClassFile(String key, Object... args) {
354 return new BadClassFile (
355 currentOwner.enclClass(),
356 currentClassFile,
357 diagFactory.fragment(key, args));
358 }
360 /************************************************************************
361 * Buffer Access
362 ***********************************************************************/
364 /** Read a character.
365 */
366 char nextChar() {
367 return (char)(((buf[bp++] & 0xFF) << 8) + (buf[bp++] & 0xFF));
368 }
370 /** Read a byte.
371 */
372 int nextByte() {
373 return buf[bp++] & 0xFF;
374 }
376 /** Read an integer.
377 */
378 int nextInt() {
379 return
380 ((buf[bp++] & 0xFF) << 24) +
381 ((buf[bp++] & 0xFF) << 16) +
382 ((buf[bp++] & 0xFF) << 8) +
383 (buf[bp++] & 0xFF);
384 }
386 /** Extract a character at position bp from buf.
387 */
388 char getChar(int bp) {
389 return
390 (char)(((buf[bp] & 0xFF) << 8) + (buf[bp+1] & 0xFF));
391 }
393 /** Extract an integer at position bp from buf.
394 */
395 int getInt(int bp) {
396 return
397 ((buf[bp] & 0xFF) << 24) +
398 ((buf[bp+1] & 0xFF) << 16) +
399 ((buf[bp+2] & 0xFF) << 8) +
400 (buf[bp+3] & 0xFF);
401 }
404 /** Extract a long integer at position bp from buf.
405 */
406 long getLong(int bp) {
407 DataInputStream bufin =
408 new DataInputStream(new ByteArrayInputStream(buf, bp, 8));
409 try {
410 return bufin.readLong();
411 } catch (IOException e) {
412 throw new AssertionError(e);
413 }
414 }
416 /** Extract a float at position bp from buf.
417 */
418 float getFloat(int bp) {
419 DataInputStream bufin =
420 new DataInputStream(new ByteArrayInputStream(buf, bp, 4));
421 try {
422 return bufin.readFloat();
423 } catch (IOException e) {
424 throw new AssertionError(e);
425 }
426 }
428 /** Extract a double at position bp from buf.
429 */
430 double getDouble(int bp) {
431 DataInputStream bufin =
432 new DataInputStream(new ByteArrayInputStream(buf, bp, 8));
433 try {
434 return bufin.readDouble();
435 } catch (IOException e) {
436 throw new AssertionError(e);
437 }
438 }
440 /************************************************************************
441 * Constant Pool Access
442 ***********************************************************************/
444 /** Index all constant pool entries, writing their start addresses into
445 * poolIdx.
446 */
447 void indexPool() {
448 poolIdx = new int[nextChar()];
449 poolObj = new Object[poolIdx.length];
450 int i = 1;
451 while (i < poolIdx.length) {
452 poolIdx[i++] = bp;
453 byte tag = buf[bp++];
454 switch (tag) {
455 case CONSTANT_Utf8: case CONSTANT_Unicode: {
456 int len = nextChar();
457 bp = bp + len;
458 break;
459 }
460 case CONSTANT_Class:
461 case CONSTANT_String:
462 case CONSTANT_MethodType:
463 bp = bp + 2;
464 break;
465 case CONSTANT_MethodHandle:
466 bp = bp + 3;
467 break;
468 case CONSTANT_Fieldref:
469 case CONSTANT_Methodref:
470 case CONSTANT_InterfaceMethodref:
471 case CONSTANT_NameandType:
472 case CONSTANT_Integer:
473 case CONSTANT_Float:
474 case CONSTANT_InvokeDynamic:
475 bp = bp + 4;
476 break;
477 case CONSTANT_Long:
478 case CONSTANT_Double:
479 bp = bp + 8;
480 i++;
481 break;
482 default:
483 throw badClassFile("bad.const.pool.tag.at",
484 Byte.toString(tag),
485 Integer.toString(bp -1));
486 }
487 }
488 }
490 /** Read constant pool entry at start address i, use pool as a cache.
491 */
492 Object readPool(int i) {
493 Object result = poolObj[i];
494 if (result != null) return result;
496 int index = poolIdx[i];
497 if (index == 0) return null;
499 byte tag = buf[index];
500 switch (tag) {
501 case CONSTANT_Utf8:
502 poolObj[i] = names.fromUtf(buf, index + 3, getChar(index + 1));
503 break;
504 case CONSTANT_Unicode:
505 throw badClassFile("unicode.str.not.supported");
506 case CONSTANT_Class:
507 poolObj[i] = readClassOrType(getChar(index + 1));
508 break;
509 case CONSTANT_String:
510 // FIXME: (footprint) do not use toString here
511 poolObj[i] = readName(getChar(index + 1)).toString();
512 break;
513 case CONSTANT_Fieldref: {
514 ClassSymbol owner = readClassSymbol(getChar(index + 1));
515 NameAndType nt = (NameAndType)readPool(getChar(index + 3));
516 poolObj[i] = new VarSymbol(0, nt.name, nt.uniqueType.type, owner);
517 break;
518 }
519 case CONSTANT_Methodref:
520 case CONSTANT_InterfaceMethodref: {
521 ClassSymbol owner = readClassSymbol(getChar(index + 1));
522 NameAndType nt = (NameAndType)readPool(getChar(index + 3));
523 poolObj[i] = new MethodSymbol(0, nt.name, nt.uniqueType.type, owner);
524 break;
525 }
526 case CONSTANT_NameandType:
527 poolObj[i] = new NameAndType(
528 readName(getChar(index + 1)),
529 readType(getChar(index + 3)), types);
530 break;
531 case CONSTANT_Integer:
532 poolObj[i] = getInt(index + 1);
533 break;
534 case CONSTANT_Float:
535 poolObj[i] = new Float(getFloat(index + 1));
536 break;
537 case CONSTANT_Long:
538 poolObj[i] = new Long(getLong(index + 1));
539 break;
540 case CONSTANT_Double:
541 poolObj[i] = new Double(getDouble(index + 1));
542 break;
543 case CONSTANT_MethodHandle:
544 skipBytes(4);
545 break;
546 case CONSTANT_MethodType:
547 skipBytes(3);
548 break;
549 case CONSTANT_InvokeDynamic:
550 skipBytes(5);
551 break;
552 default:
553 throw badClassFile("bad.const.pool.tag", Byte.toString(tag));
554 }
555 return poolObj[i];
556 }
558 /** Read signature and convert to type.
559 */
560 Type readType(int i) {
561 int index = poolIdx[i];
562 return sigToType(buf, index + 3, getChar(index + 1));
563 }
565 /** If name is an array type or class signature, return the
566 * corresponding type; otherwise return a ClassSymbol with given name.
567 */
568 Object readClassOrType(int i) {
569 int index = poolIdx[i];
570 int len = getChar(index + 1);
571 int start = index + 3;
572 Assert.check(buf[start] == '[' || buf[start + len - 1] != ';');
573 // by the above assertion, the following test can be
574 // simplified to (buf[start] == '[')
575 return (buf[start] == '[' || buf[start + len - 1] == ';')
576 ? (Object)sigToType(buf, start, len)
577 : (Object)enterClass(names.fromUtf(internalize(buf, start,
578 len)));
579 }
581 /** Read signature and convert to type parameters.
582 */
583 List<Type> readTypeParams(int i) {
584 int index = poolIdx[i];
585 return sigToTypeParams(buf, index + 3, getChar(index + 1));
586 }
588 /** Read class entry.
589 */
590 ClassSymbol readClassSymbol(int i) {
591 return (ClassSymbol) (readPool(i));
592 }
594 /** Read name.
595 */
596 Name readName(int i) {
597 return (Name) (readPool(i));
598 }
600 /************************************************************************
601 * Reading Types
602 ***********************************************************************/
604 /** The unread portion of the currently read type is
605 * signature[sigp..siglimit-1].
606 */
607 byte[] signature;
608 int sigp;
609 int siglimit;
610 boolean sigEnterPhase = false;
612 /** Convert signature to type, where signature is a byte array segment.
613 */
614 Type sigToType(byte[] sig, int offset, int len) {
615 signature = sig;
616 sigp = offset;
617 siglimit = offset + len;
618 return sigToType();
619 }
621 /** Convert signature to type, where signature is implicit.
622 */
623 Type sigToType() {
624 switch ((char) signature[sigp]) {
625 case 'T':
626 sigp++;
627 int start = sigp;
628 while (signature[sigp] != ';') sigp++;
629 sigp++;
630 return sigEnterPhase
631 ? Type.noType
632 : findTypeVar(names.fromUtf(signature, start, sigp - 1 - start));
633 case '+': {
634 sigp++;
635 Type t = sigToType();
636 return new WildcardType(t, BoundKind.EXTENDS,
637 syms.boundClass);
638 }
639 case '*':
640 sigp++;
641 return new WildcardType(syms.objectType, BoundKind.UNBOUND,
642 syms.boundClass);
643 case '-': {
644 sigp++;
645 Type t = sigToType();
646 return new WildcardType(t, BoundKind.SUPER,
647 syms.boundClass);
648 }
649 case 'B':
650 sigp++;
651 return syms.byteType;
652 case 'C':
653 sigp++;
654 return syms.charType;
655 case 'D':
656 sigp++;
657 return syms.doubleType;
658 case 'F':
659 sigp++;
660 return syms.floatType;
661 case 'I':
662 sigp++;
663 return syms.intType;
664 case 'J':
665 sigp++;
666 return syms.longType;
667 case 'L':
668 {
669 // int oldsigp = sigp;
670 Type t = classSigToType();
671 if (sigp < siglimit && signature[sigp] == '.')
672 throw badClassFile("deprecated inner class signature syntax " +
673 "(please recompile from source)");
674 /*
675 System.err.println(" decoded " +
676 new String(signature, oldsigp, sigp-oldsigp) +
677 " => " + t + " outer " + t.outer());
678 */
679 return t;
680 }
681 case 'S':
682 sigp++;
683 return syms.shortType;
684 case 'V':
685 sigp++;
686 return syms.voidType;
687 case 'Z':
688 sigp++;
689 return syms.booleanType;
690 case '[':
691 sigp++;
692 return new ArrayType(sigToType(), syms.arrayClass);
693 case '(':
694 sigp++;
695 List<Type> argtypes = sigToTypes(')');
696 Type restype = sigToType();
697 List<Type> thrown = List.nil();
698 while (signature[sigp] == '^') {
699 sigp++;
700 thrown = thrown.prepend(sigToType());
701 }
702 // if there is a typevar in the throws clause we should state it.
703 for (List<Type> l = thrown; l.nonEmpty(); l = l.tail) {
704 if (l.head.hasTag(TYPEVAR)) {
705 l.head.tsym.flags_field |= THROWS;
706 }
707 }
708 return new MethodType(argtypes,
709 restype,
710 thrown.reverse(),
711 syms.methodClass);
712 case '<':
713 typevars = typevars.dup(currentOwner);
714 Type poly = new ForAll(sigToTypeParams(), sigToType());
715 typevars = typevars.leave();
716 return poly;
717 default:
718 throw badClassFile("bad.signature",
719 Convert.utf2string(signature, sigp, 10));
720 }
721 }
723 byte[] signatureBuffer = new byte[0];
724 int sbp = 0;
725 /** Convert class signature to type, where signature is implicit.
726 */
727 Type classSigToType() {
728 if (signature[sigp] != 'L')
729 throw badClassFile("bad.class.signature",
730 Convert.utf2string(signature, sigp, 10));
731 sigp++;
732 Type outer = Type.noType;
733 int startSbp = sbp;
735 while (true) {
736 final byte c = signature[sigp++];
737 switch (c) {
739 case ';': { // end
740 ClassSymbol t = enterClass(names.fromUtf(signatureBuffer,
741 startSbp,
742 sbp - startSbp));
744 try {
745 return (outer == Type.noType) ?
746 t.erasure(types) :
747 new ClassType(outer, List.<Type>nil(), t);
748 } finally {
749 sbp = startSbp;
750 }
751 }
753 case '<': // generic arguments
754 ClassSymbol t = enterClass(names.fromUtf(signatureBuffer,
755 startSbp,
756 sbp - startSbp));
757 outer = new ClassType(outer, sigToTypes('>'), t) {
758 boolean completed = false;
759 @Override
760 public Type getEnclosingType() {
761 if (!completed) {
762 completed = true;
763 tsym.complete();
764 Type enclosingType = tsym.type.getEnclosingType();
765 if (enclosingType != Type.noType) {
766 List<Type> typeArgs =
767 super.getEnclosingType().allparams();
768 List<Type> typeParams =
769 enclosingType.allparams();
770 if (typeParams.length() != typeArgs.length()) {
771 // no "rare" types
772 super.setEnclosingType(types.erasure(enclosingType));
773 } else {
774 super.setEnclosingType(types.subst(enclosingType,
775 typeParams,
776 typeArgs));
777 }
778 } else {
779 super.setEnclosingType(Type.noType);
780 }
781 }
782 return super.getEnclosingType();
783 }
784 @Override
785 public void setEnclosingType(Type outer) {
786 throw new UnsupportedOperationException();
787 }
788 };
789 switch (signature[sigp++]) {
790 case ';':
791 if (sigp < signature.length && signature[sigp] == '.') {
792 // support old-style GJC signatures
793 // The signature produced was
794 // Lfoo/Outer<Lfoo/X;>;.Lfoo/Outer$Inner<Lfoo/Y;>;
795 // rather than say
796 // Lfoo/Outer<Lfoo/X;>.Inner<Lfoo/Y;>;
797 // so we skip past ".Lfoo/Outer$"
798 sigp += (sbp - startSbp) + // "foo/Outer"
799 3; // ".L" and "$"
800 signatureBuffer[sbp++] = (byte)'$';
801 break;
802 } else {
803 sbp = startSbp;
804 return outer;
805 }
806 case '.':
807 signatureBuffer[sbp++] = (byte)'$';
808 break;
809 default:
810 throw new AssertionError(signature[sigp-1]);
811 }
812 continue;
814 case '.':
815 //we have seen an enclosing non-generic class
816 if (outer != Type.noType) {
817 t = enterClass(names.fromUtf(signatureBuffer,
818 startSbp,
819 sbp - startSbp));
820 outer = new ClassType(outer, List.<Type>nil(), t);
821 }
822 signatureBuffer[sbp++] = (byte)'$';
823 continue;
824 case '/':
825 signatureBuffer[sbp++] = (byte)'.';
826 continue;
827 default:
828 signatureBuffer[sbp++] = c;
829 continue;
830 }
831 }
832 }
834 /** Convert (implicit) signature to list of types
835 * until `terminator' is encountered.
836 */
837 List<Type> sigToTypes(char terminator) {
838 List<Type> head = List.of(null);
839 List<Type> tail = head;
840 while (signature[sigp] != terminator)
841 tail = tail.setTail(List.of(sigToType()));
842 sigp++;
843 return head.tail;
844 }
846 /** Convert signature to type parameters, where signature is a byte
847 * array segment.
848 */
849 List<Type> sigToTypeParams(byte[] sig, int offset, int len) {
850 signature = sig;
851 sigp = offset;
852 siglimit = offset + len;
853 return sigToTypeParams();
854 }
856 /** Convert signature to type parameters, where signature is implicit.
857 */
858 List<Type> sigToTypeParams() {
859 List<Type> tvars = List.nil();
860 if (signature[sigp] == '<') {
861 sigp++;
862 int start = sigp;
863 sigEnterPhase = true;
864 while (signature[sigp] != '>')
865 tvars = tvars.prepend(sigToTypeParam());
866 sigEnterPhase = false;
867 sigp = start;
868 while (signature[sigp] != '>')
869 sigToTypeParam();
870 sigp++;
871 }
872 return tvars.reverse();
873 }
875 /** Convert (implicit) signature to type parameter.
876 */
877 Type sigToTypeParam() {
878 int start = sigp;
879 while (signature[sigp] != ':') sigp++;
880 Name name = names.fromUtf(signature, start, sigp - start);
881 TypeVar tvar;
882 if (sigEnterPhase) {
883 tvar = new TypeVar(name, currentOwner, syms.botType);
884 typevars.enter(tvar.tsym);
885 } else {
886 tvar = (TypeVar)findTypeVar(name);
887 }
888 List<Type> bounds = List.nil();
889 boolean allInterfaces = false;
890 if (signature[sigp] == ':' && signature[sigp+1] == ':') {
891 sigp++;
892 allInterfaces = true;
893 }
894 while (signature[sigp] == ':') {
895 sigp++;
896 bounds = bounds.prepend(sigToType());
897 }
898 if (!sigEnterPhase) {
899 types.setBounds(tvar, bounds.reverse(), allInterfaces);
900 }
901 return tvar;
902 }
904 /** Find type variable with given name in `typevars' scope.
905 */
906 Type findTypeVar(Name name) {
907 Scope.Entry e = typevars.lookup(name);
908 if (e.scope != null) {
909 return e.sym.type;
910 } else {
911 if (readingClassAttr) {
912 // While reading the class attribute, the supertypes
913 // might refer to a type variable from an enclosing element
914 // (method or class).
915 // If the type variable is defined in the enclosing class,
916 // we can actually find it in
917 // currentOwner.owner.type.getTypeArguments()
918 // However, until we have read the enclosing method attribute
919 // we don't know for sure if this owner is correct. It could
920 // be a method and there is no way to tell before reading the
921 // enclosing method attribute.
922 TypeVar t = new TypeVar(name, currentOwner, syms.botType);
923 missingTypeVariables = missingTypeVariables.prepend(t);
924 // System.err.println("Missing type var " + name);
925 return t;
926 }
927 throw badClassFile("undecl.type.var", name);
928 }
929 }
931 /************************************************************************
932 * Reading Attributes
933 ***********************************************************************/
935 protected enum AttributeKind { CLASS, MEMBER };
936 protected abstract class AttributeReader {
937 protected AttributeReader(Name name, ClassFile.Version version, Set<AttributeKind> kinds) {
938 this.name = name;
939 this.version = version;
940 this.kinds = kinds;
941 }
943 protected boolean accepts(AttributeKind kind) {
944 if (kinds.contains(kind)) {
945 if (majorVersion > version.major || (majorVersion == version.major && minorVersion >= version.minor))
946 return true;
948 if (lintClassfile && !warnedAttrs.contains(name)) {
949 JavaFileObject prev = log.useSource(currentClassFile);
950 try {
951 log.warning(LintCategory.CLASSFILE, (DiagnosticPosition) null, "future.attr",
952 name, version.major, version.minor, majorVersion, minorVersion);
953 } finally {
954 log.useSource(prev);
955 }
956 warnedAttrs.add(name);
957 }
958 }
959 return false;
960 }
962 protected abstract void read(Symbol sym, int attrLen);
964 protected final Name name;
965 protected final ClassFile.Version version;
966 protected final Set<AttributeKind> kinds;
967 }
969 protected Set<AttributeKind> CLASS_ATTRIBUTE =
970 EnumSet.of(AttributeKind.CLASS);
971 protected Set<AttributeKind> MEMBER_ATTRIBUTE =
972 EnumSet.of(AttributeKind.MEMBER);
973 protected Set<AttributeKind> CLASS_OR_MEMBER_ATTRIBUTE =
974 EnumSet.of(AttributeKind.CLASS, AttributeKind.MEMBER);
976 protected Map<Name, AttributeReader> attributeReaders = new HashMap<Name, AttributeReader>();
978 private void initAttributeReaders() {
979 AttributeReader[] readers = {
980 // v45.3 attributes
982 new AttributeReader(names.Code, V45_3, MEMBER_ATTRIBUTE) {
983 protected void read(Symbol sym, int attrLen) {
984 if (readAllOfClassFile || saveParameterNames)
985 ((MethodSymbol)sym).code = readCode(sym);
986 else
987 bp = bp + attrLen;
988 }
989 },
991 new AttributeReader(names.ConstantValue, V45_3, MEMBER_ATTRIBUTE) {
992 protected void read(Symbol sym, int attrLen) {
993 Object v = readPool(nextChar());
994 // Ignore ConstantValue attribute if field not final.
995 if ((sym.flags() & FINAL) != 0)
996 ((VarSymbol) sym).setData(v);
997 }
998 },
1000 new AttributeReader(names.Deprecated, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) {
1001 protected void read(Symbol sym, int attrLen) {
1002 sym.flags_field |= DEPRECATED;
1003 }
1004 },
1006 new AttributeReader(names.Exceptions, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) {
1007 protected void read(Symbol sym, int attrLen) {
1008 int nexceptions = nextChar();
1009 List<Type> thrown = List.nil();
1010 for (int j = 0; j < nexceptions; j++)
1011 thrown = thrown.prepend(readClassSymbol(nextChar()).type);
1012 if (sym.type.getThrownTypes().isEmpty())
1013 sym.type.asMethodType().thrown = thrown.reverse();
1014 }
1015 },
1017 new AttributeReader(names.InnerClasses, V45_3, CLASS_ATTRIBUTE) {
1018 protected void read(Symbol sym, int attrLen) {
1019 ClassSymbol c = (ClassSymbol) sym;
1020 readInnerClasses(c);
1021 }
1022 },
1024 new AttributeReader(names.LocalVariableTable, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) {
1025 protected void read(Symbol sym, int attrLen) {
1026 int newbp = bp + attrLen;
1027 if (saveParameterNames && !sawMethodParameters) {
1028 // Pick up parameter names from the variable table.
1029 // Parameter names are not explicitly identified as such,
1030 // but all parameter name entries in the LocalVariableTable
1031 // have a start_pc of 0. Therefore, we record the name
1032 // indicies of all slots with a start_pc of zero in the
1033 // parameterNameIndicies array.
1034 // Note that this implicitly honors the JVMS spec that
1035 // there may be more than one LocalVariableTable, and that
1036 // there is no specified ordering for the entries.
1037 int numEntries = nextChar();
1038 for (int i = 0; i < numEntries; i++) {
1039 int start_pc = nextChar();
1040 int length = nextChar();
1041 int nameIndex = nextChar();
1042 int sigIndex = nextChar();
1043 int register = nextChar();
1044 if (start_pc == 0) {
1045 // ensure array large enough
1046 if (register >= parameterNameIndices.length) {
1047 int newSize = Math.max(register, parameterNameIndices.length + 8);
1048 parameterNameIndices =
1049 Arrays.copyOf(parameterNameIndices, newSize);
1050 }
1051 parameterNameIndices[register] = nameIndex;
1052 haveParameterNameIndices = true;
1053 }
1054 }
1055 }
1056 bp = newbp;
1057 }
1058 },
1060 new AttributeReader(names.MethodParameters, V52, MEMBER_ATTRIBUTE) {
1061 protected void read(Symbol sym, int attrlen) {
1062 int newbp = bp + attrlen;
1063 if (saveParameterNames) {
1064 sawMethodParameters = true;
1065 int numEntries = nextByte();
1066 parameterNameIndices = new int[numEntries];
1067 haveParameterNameIndices = true;
1068 for (int i = 0; i < numEntries; i++) {
1069 int nameIndex = nextChar();
1070 int flags = nextChar();
1071 parameterNameIndices[i] = nameIndex;
1072 }
1073 }
1074 bp = newbp;
1075 }
1076 },
1079 new AttributeReader(names.SourceFile, V45_3, CLASS_ATTRIBUTE) {
1080 protected void read(Symbol sym, int attrLen) {
1081 ClassSymbol c = (ClassSymbol) sym;
1082 Name n = readName(nextChar());
1083 c.sourcefile = new SourceFileObject(n, c.flatname);
1084 // If the class is a toplevel class, originating from a Java source file,
1085 // but the class name does not match the file name, then it is
1086 // an auxiliary class.
1087 String sn = n.toString();
1088 if (c.owner.kind == Kinds.PCK &&
1089 sn.endsWith(".java") &&
1090 !sn.equals(c.name.toString()+".java")) {
1091 c.flags_field |= AUXILIARY;
1092 }
1093 }
1094 },
1096 new AttributeReader(names.Synthetic, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) {
1097 protected void read(Symbol sym, int attrLen) {
1098 // bridge methods are visible when generics not enabled
1099 if (allowGenerics || (sym.flags_field & BRIDGE) == 0)
1100 sym.flags_field |= SYNTHETIC;
1101 }
1102 },
1104 // standard v49 attributes
1106 new AttributeReader(names.EnclosingMethod, V49, CLASS_ATTRIBUTE) {
1107 protected void read(Symbol sym, int attrLen) {
1108 int newbp = bp + attrLen;
1109 readEnclosingMethodAttr(sym);
1110 bp = newbp;
1111 }
1112 },
1114 new AttributeReader(names.Signature, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1115 @Override
1116 protected boolean accepts(AttributeKind kind) {
1117 return super.accepts(kind) && allowGenerics;
1118 }
1120 protected void read(Symbol sym, int attrLen) {
1121 if (sym.kind == TYP) {
1122 ClassSymbol c = (ClassSymbol) sym;
1123 readingClassAttr = true;
1124 try {
1125 ClassType ct1 = (ClassType)c.type;
1126 Assert.check(c == currentOwner);
1127 ct1.typarams_field = readTypeParams(nextChar());
1128 ct1.supertype_field = sigToType();
1129 ListBuffer<Type> is = new ListBuffer<Type>();
1130 while (sigp != siglimit) is.append(sigToType());
1131 ct1.interfaces_field = is.toList();
1132 } finally {
1133 readingClassAttr = false;
1134 }
1135 } else {
1136 List<Type> thrown = sym.type.getThrownTypes();
1137 sym.type = readType(nextChar());
1138 //- System.err.println(" # " + sym.type);
1139 if (sym.kind == MTH && sym.type.getThrownTypes().isEmpty())
1140 sym.type.asMethodType().thrown = thrown;
1142 }
1143 }
1144 },
1146 // v49 annotation attributes
1148 new AttributeReader(names.AnnotationDefault, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1149 protected void read(Symbol sym, int attrLen) {
1150 attachAnnotationDefault(sym);
1151 }
1152 },
1154 new AttributeReader(names.RuntimeInvisibleAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1155 protected void read(Symbol sym, int attrLen) {
1156 attachAnnotations(sym);
1157 }
1158 },
1160 new AttributeReader(names.RuntimeInvisibleParameterAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1161 protected void read(Symbol sym, int attrLen) {
1162 attachParameterAnnotations(sym);
1163 }
1164 },
1166 new AttributeReader(names.RuntimeVisibleAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1167 protected void read(Symbol sym, int attrLen) {
1168 attachAnnotations(sym);
1169 }
1170 },
1172 new AttributeReader(names.RuntimeVisibleParameterAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1173 protected void read(Symbol sym, int attrLen) {
1174 attachParameterAnnotations(sym);
1175 }
1176 },
1178 // additional "legacy" v49 attributes, superceded by flags
1180 new AttributeReader(names.Annotation, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1181 protected void read(Symbol sym, int attrLen) {
1182 if (allowAnnotations)
1183 sym.flags_field |= ANNOTATION;
1184 }
1185 },
1187 new AttributeReader(names.Bridge, V49, MEMBER_ATTRIBUTE) {
1188 protected void read(Symbol sym, int attrLen) {
1189 sym.flags_field |= BRIDGE;
1190 if (!allowGenerics)
1191 sym.flags_field &= ~SYNTHETIC;
1192 }
1193 },
1195 new AttributeReader(names.Enum, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1196 protected void read(Symbol sym, int attrLen) {
1197 sym.flags_field |= ENUM;
1198 }
1199 },
1201 new AttributeReader(names.Varargs, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1202 protected void read(Symbol sym, int attrLen) {
1203 if (allowVarargs)
1204 sym.flags_field |= VARARGS;
1205 }
1206 },
1208 new AttributeReader(names.RuntimeVisibleTypeAnnotations, V52, CLASS_OR_MEMBER_ATTRIBUTE) {
1209 protected void read(Symbol sym, int attrLen) {
1210 attachTypeAnnotations(sym);
1211 }
1212 },
1214 new AttributeReader(names.RuntimeInvisibleTypeAnnotations, V52, CLASS_OR_MEMBER_ATTRIBUTE) {
1215 protected void read(Symbol sym, int attrLen) {
1216 attachTypeAnnotations(sym);
1217 }
1218 },
1221 // The following attributes for a Code attribute are not currently handled
1222 // StackMapTable
1223 // SourceDebugExtension
1224 // LineNumberTable
1225 // LocalVariableTypeTable
1226 };
1228 for (AttributeReader r: readers)
1229 attributeReaders.put(r.name, r);
1230 }
1232 /** Report unrecognized attribute.
1233 */
1234 void unrecognized(Name attrName) {
1235 if (checkClassFile)
1236 printCCF("ccf.unrecognized.attribute", attrName);
1237 }
1241 protected void readEnclosingMethodAttr(Symbol sym) {
1242 // sym is a nested class with an "Enclosing Method" attribute
1243 // remove sym from it's current owners scope and place it in
1244 // the scope specified by the attribute
1245 sym.owner.members().remove(sym);
1246 ClassSymbol self = (ClassSymbol)sym;
1247 ClassSymbol c = readClassSymbol(nextChar());
1248 NameAndType nt = (NameAndType)readPool(nextChar());
1250 if (c.members_field == null)
1251 throw badClassFile("bad.enclosing.class", self, c);
1253 MethodSymbol m = findMethod(nt, c.members_field, self.flags());
1254 if (nt != null && m == null)
1255 throw badClassFile("bad.enclosing.method", self);
1257 self.name = simpleBinaryName(self.flatname, c.flatname) ;
1258 self.owner = m != null ? m : c;
1259 if (self.name.isEmpty())
1260 self.fullname = names.empty;
1261 else
1262 self.fullname = ClassSymbol.formFullName(self.name, self.owner);
1264 if (m != null) {
1265 ((ClassType)sym.type).setEnclosingType(m.type);
1266 } else if ((self.flags_field & STATIC) == 0) {
1267 ((ClassType)sym.type).setEnclosingType(c.type);
1268 } else {
1269 ((ClassType)sym.type).setEnclosingType(Type.noType);
1270 }
1271 enterTypevars(self);
1272 if (!missingTypeVariables.isEmpty()) {
1273 ListBuffer<Type> typeVars = new ListBuffer<Type>();
1274 for (Type typevar : missingTypeVariables) {
1275 typeVars.append(findTypeVar(typevar.tsym.name));
1276 }
1277 foundTypeVariables = typeVars.toList();
1278 } else {
1279 foundTypeVariables = List.nil();
1280 }
1281 }
1283 // See java.lang.Class
1284 private Name simpleBinaryName(Name self, Name enclosing) {
1285 String simpleBinaryName = self.toString().substring(enclosing.toString().length());
1286 if (simpleBinaryName.length() < 1 || simpleBinaryName.charAt(0) != '$')
1287 throw badClassFile("bad.enclosing.method", self);
1288 int index = 1;
1289 while (index < simpleBinaryName.length() &&
1290 isAsciiDigit(simpleBinaryName.charAt(index)))
1291 index++;
1292 return names.fromString(simpleBinaryName.substring(index));
1293 }
1295 private MethodSymbol findMethod(NameAndType nt, Scope scope, long flags) {
1296 if (nt == null)
1297 return null;
1299 MethodType type = nt.uniqueType.type.asMethodType();
1301 for (Scope.Entry e = scope.lookup(nt.name); e.scope != null; e = e.next())
1302 if (e.sym.kind == MTH && isSameBinaryType(e.sym.type.asMethodType(), type))
1303 return (MethodSymbol)e.sym;
1305 if (nt.name != names.init)
1306 // not a constructor
1307 return null;
1308 if ((flags & INTERFACE) != 0)
1309 // no enclosing instance
1310 return null;
1311 if (nt.uniqueType.type.getParameterTypes().isEmpty())
1312 // no parameters
1313 return null;
1315 // A constructor of an inner class.
1316 // Remove the first argument (the enclosing instance)
1317 nt.setType(new MethodType(nt.uniqueType.type.getParameterTypes().tail,
1318 nt.uniqueType.type.getReturnType(),
1319 nt.uniqueType.type.getThrownTypes(),
1320 syms.methodClass));
1321 // Try searching again
1322 return findMethod(nt, scope, flags);
1323 }
1325 /** Similar to Types.isSameType but avoids completion */
1326 private boolean isSameBinaryType(MethodType mt1, MethodType mt2) {
1327 List<Type> types1 = types.erasure(mt1.getParameterTypes())
1328 .prepend(types.erasure(mt1.getReturnType()));
1329 List<Type> types2 = mt2.getParameterTypes().prepend(mt2.getReturnType());
1330 while (!types1.isEmpty() && !types2.isEmpty()) {
1331 if (types1.head.tsym != types2.head.tsym)
1332 return false;
1333 types1 = types1.tail;
1334 types2 = types2.tail;
1335 }
1336 return types1.isEmpty() && types2.isEmpty();
1337 }
1339 /**
1340 * Character.isDigit answers <tt>true</tt> to some non-ascii
1341 * digits. This one does not. <b>copied from java.lang.Class</b>
1342 */
1343 private static boolean isAsciiDigit(char c) {
1344 return '0' <= c && c <= '9';
1345 }
1347 /** Read member attributes.
1348 */
1349 void readMemberAttrs(Symbol sym) {
1350 readAttrs(sym, AttributeKind.MEMBER);
1351 }
1353 void readAttrs(Symbol sym, AttributeKind kind) {
1354 char ac = nextChar();
1355 for (int i = 0; i < ac; i++) {
1356 Name attrName = readName(nextChar());
1357 int attrLen = nextInt();
1358 AttributeReader r = attributeReaders.get(attrName);
1359 if (r != null && r.accepts(kind))
1360 r.read(sym, attrLen);
1361 else {
1362 unrecognized(attrName);
1363 bp = bp + attrLen;
1364 }
1365 }
1366 }
1368 private boolean readingClassAttr = false;
1369 private List<Type> missingTypeVariables = List.nil();
1370 private List<Type> foundTypeVariables = List.nil();
1372 /** Read class attributes.
1373 */
1374 void readClassAttrs(ClassSymbol c) {
1375 readAttrs(c, AttributeKind.CLASS);
1376 }
1378 /** Read code block.
1379 */
1380 Code readCode(Symbol owner) {
1381 nextChar(); // max_stack
1382 nextChar(); // max_locals
1383 final int code_length = nextInt();
1384 bp += code_length;
1385 final char exception_table_length = nextChar();
1386 bp += exception_table_length * 8;
1387 readMemberAttrs(owner);
1388 return null;
1389 }
1391 /************************************************************************
1392 * Reading Java-language annotations
1393 ***********************************************************************/
1395 /** Attach annotations.
1396 */
1397 void attachAnnotations(final Symbol sym) {
1398 int numAttributes = nextChar();
1399 if (numAttributes != 0) {
1400 ListBuffer<CompoundAnnotationProxy> proxies =
1401 new ListBuffer<CompoundAnnotationProxy>();
1402 for (int i = 0; i<numAttributes; i++) {
1403 CompoundAnnotationProxy proxy = readCompoundAnnotation();
1404 if (proxy.type.tsym == syms.proprietaryType.tsym)
1405 sym.flags_field |= PROPRIETARY;
1406 else if (proxy.type.tsym == syms.profileType.tsym) {
1407 if (profile != Profile.DEFAULT) {
1408 for (Pair<Name,Attribute> v: proxy.values) {
1409 if (v.fst == names.value && v.snd instanceof Attribute.Constant) {
1410 Attribute.Constant c = (Attribute.Constant) v.snd;
1411 if (c.type == syms.intType && ((Integer) c.value) > profile.value) {
1412 sym.flags_field |= NOT_IN_PROFILE;
1413 }
1414 }
1415 }
1416 }
1417 } else
1418 proxies.append(proxy);
1419 }
1420 annotate.normal(new AnnotationCompleter(sym, proxies.toList()));
1421 }
1422 }
1424 /** Attach parameter annotations.
1425 */
1426 void attachParameterAnnotations(final Symbol method) {
1427 final MethodSymbol meth = (MethodSymbol)method;
1428 int numParameters = buf[bp++] & 0xFF;
1429 List<VarSymbol> parameters = meth.params();
1430 int pnum = 0;
1431 while (parameters.tail != null) {
1432 attachAnnotations(parameters.head);
1433 parameters = parameters.tail;
1434 pnum++;
1435 }
1436 if (pnum != numParameters) {
1437 throw badClassFile("bad.runtime.invisible.param.annotations", meth);
1438 }
1439 }
1441 void attachTypeAnnotations(final Symbol sym) {
1442 int numAttributes = nextChar();
1443 if (numAttributes != 0) {
1444 ListBuffer<TypeAnnotationProxy> proxies = new ListBuffer<>();
1445 for (int i = 0; i < numAttributes; i++)
1446 proxies.append(readTypeAnnotation());
1447 annotate.normal(new TypeAnnotationCompleter(sym, proxies.toList()));
1448 }
1449 }
1451 /** Attach the default value for an annotation element.
1452 */
1453 void attachAnnotationDefault(final Symbol sym) {
1454 final MethodSymbol meth = (MethodSymbol)sym; // only on methods
1455 final Attribute value = readAttributeValue();
1457 // The default value is set later during annotation. It might
1458 // be the case that the Symbol sym is annotated _after_ the
1459 // repeating instances that depend on this default value,
1460 // because of this we set an interim value that tells us this
1461 // element (most likely) has a default.
1462 //
1463 // Set interim value for now, reset just before we do this
1464 // properly at annotate time.
1465 meth.defaultValue = value;
1466 annotate.normal(new AnnotationDefaultCompleter(meth, value));
1467 }
1469 Type readTypeOrClassSymbol(int i) {
1470 // support preliminary jsr175-format class files
1471 if (buf[poolIdx[i]] == CONSTANT_Class)
1472 return readClassSymbol(i).type;
1473 return readType(i);
1474 }
1475 Type readEnumType(int i) {
1476 // support preliminary jsr175-format class files
1477 int index = poolIdx[i];
1478 int length = getChar(index + 1);
1479 if (buf[index + length + 2] != ';')
1480 return enterClass(readName(i)).type;
1481 return readType(i);
1482 }
1484 CompoundAnnotationProxy readCompoundAnnotation() {
1485 Type t = readTypeOrClassSymbol(nextChar());
1486 int numFields = nextChar();
1487 ListBuffer<Pair<Name,Attribute>> pairs =
1488 new ListBuffer<Pair<Name,Attribute>>();
1489 for (int i=0; i<numFields; i++) {
1490 Name name = readName(nextChar());
1491 Attribute value = readAttributeValue();
1492 pairs.append(new Pair<Name,Attribute>(name, value));
1493 }
1494 return new CompoundAnnotationProxy(t, pairs.toList());
1495 }
1497 TypeAnnotationProxy readTypeAnnotation() {
1498 TypeAnnotationPosition position = readPosition();
1499 CompoundAnnotationProxy proxy = readCompoundAnnotation();
1501 return new TypeAnnotationProxy(proxy, position);
1502 }
1504 TypeAnnotationPosition readPosition() {
1505 int tag = nextByte(); // TargetType tag is a byte
1507 if (!TargetType.isValidTargetTypeValue(tag))
1508 throw this.badClassFile("bad.type.annotation.value", String.format("0x%02X", tag));
1510 TypeAnnotationPosition position = new TypeAnnotationPosition();
1511 TargetType type = TargetType.fromTargetTypeValue(tag);
1513 position.type = type;
1515 switch (type) {
1516 // instanceof
1517 case INSTANCEOF:
1518 // new expression
1519 case NEW:
1520 // constructor/method reference receiver
1521 case CONSTRUCTOR_REFERENCE:
1522 case METHOD_REFERENCE:
1523 position.offset = nextChar();
1524 break;
1525 // local variable
1526 case LOCAL_VARIABLE:
1527 // resource variable
1528 case RESOURCE_VARIABLE:
1529 int table_length = nextChar();
1530 position.lvarOffset = new int[table_length];
1531 position.lvarLength = new int[table_length];
1532 position.lvarIndex = new int[table_length];
1534 for (int i = 0; i < table_length; ++i) {
1535 position.lvarOffset[i] = nextChar();
1536 position.lvarLength[i] = nextChar();
1537 position.lvarIndex[i] = nextChar();
1538 }
1539 break;
1540 // exception parameter
1541 case EXCEPTION_PARAMETER:
1542 position.exception_index = nextChar();
1543 break;
1544 // method receiver
1545 case METHOD_RECEIVER:
1546 // Do nothing
1547 break;
1548 // type parameter
1549 case CLASS_TYPE_PARAMETER:
1550 case METHOD_TYPE_PARAMETER:
1551 position.parameter_index = nextByte();
1552 break;
1553 // type parameter bound
1554 case CLASS_TYPE_PARAMETER_BOUND:
1555 case METHOD_TYPE_PARAMETER_BOUND:
1556 position.parameter_index = nextByte();
1557 position.bound_index = nextByte();
1558 break;
1559 // class extends or implements clause
1560 case CLASS_EXTENDS:
1561 position.type_index = nextChar();
1562 break;
1563 // throws
1564 case THROWS:
1565 position.type_index = nextChar();
1566 break;
1567 // method parameter
1568 case METHOD_FORMAL_PARAMETER:
1569 position.parameter_index = nextByte();
1570 break;
1571 // type cast
1572 case CAST:
1573 // method/constructor/reference type argument
1574 case CONSTRUCTOR_INVOCATION_TYPE_ARGUMENT:
1575 case METHOD_INVOCATION_TYPE_ARGUMENT:
1576 case CONSTRUCTOR_REFERENCE_TYPE_ARGUMENT:
1577 case METHOD_REFERENCE_TYPE_ARGUMENT:
1578 position.offset = nextChar();
1579 position.type_index = nextByte();
1580 break;
1581 // We don't need to worry about these
1582 case METHOD_RETURN:
1583 case FIELD:
1584 break;
1585 case UNKNOWN:
1586 throw new AssertionError("jvm.ClassReader: UNKNOWN target type should never occur!");
1587 default:
1588 throw new AssertionError("jvm.ClassReader: Unknown target type for position: " + position);
1589 }
1591 { // See whether there is location info and read it
1592 int len = nextByte();
1593 ListBuffer<Integer> loc = new ListBuffer<>();
1594 for (int i = 0; i < len * TypeAnnotationPosition.TypePathEntry.bytesPerEntry; ++i)
1595 loc = loc.append(nextByte());
1596 position.location = TypeAnnotationPosition.getTypePathFromBinary(loc.toList());
1597 }
1599 return position;
1600 }
1602 Attribute readAttributeValue() {
1603 char c = (char) buf[bp++];
1604 switch (c) {
1605 case 'B':
1606 return new Attribute.Constant(syms.byteType, readPool(nextChar()));
1607 case 'C':
1608 return new Attribute.Constant(syms.charType, readPool(nextChar()));
1609 case 'D':
1610 return new Attribute.Constant(syms.doubleType, readPool(nextChar()));
1611 case 'F':
1612 return new Attribute.Constant(syms.floatType, readPool(nextChar()));
1613 case 'I':
1614 return new Attribute.Constant(syms.intType, readPool(nextChar()));
1615 case 'J':
1616 return new Attribute.Constant(syms.longType, readPool(nextChar()));
1617 case 'S':
1618 return new Attribute.Constant(syms.shortType, readPool(nextChar()));
1619 case 'Z':
1620 return new Attribute.Constant(syms.booleanType, readPool(nextChar()));
1621 case 's':
1622 return new Attribute.Constant(syms.stringType, readPool(nextChar()).toString());
1623 case 'e':
1624 return new EnumAttributeProxy(readEnumType(nextChar()), readName(nextChar()));
1625 case 'c':
1626 return new Attribute.Class(types, readTypeOrClassSymbol(nextChar()));
1627 case '[': {
1628 int n = nextChar();
1629 ListBuffer<Attribute> l = new ListBuffer<Attribute>();
1630 for (int i=0; i<n; i++)
1631 l.append(readAttributeValue());
1632 return new ArrayAttributeProxy(l.toList());
1633 }
1634 case '@':
1635 return readCompoundAnnotation();
1636 default:
1637 throw new AssertionError("unknown annotation tag '" + c + "'");
1638 }
1639 }
1641 interface ProxyVisitor extends Attribute.Visitor {
1642 void visitEnumAttributeProxy(EnumAttributeProxy proxy);
1643 void visitArrayAttributeProxy(ArrayAttributeProxy proxy);
1644 void visitCompoundAnnotationProxy(CompoundAnnotationProxy proxy);
1645 }
1647 static class EnumAttributeProxy extends Attribute {
1648 Type enumType;
1649 Name enumerator;
1650 public EnumAttributeProxy(Type enumType, Name enumerator) {
1651 super(null);
1652 this.enumType = enumType;
1653 this.enumerator = enumerator;
1654 }
1655 public void accept(Visitor v) { ((ProxyVisitor)v).visitEnumAttributeProxy(this); }
1656 @Override
1657 public String toString() {
1658 return "/*proxy enum*/" + enumType + "." + enumerator;
1659 }
1660 }
1662 static class ArrayAttributeProxy extends Attribute {
1663 List<Attribute> values;
1664 ArrayAttributeProxy(List<Attribute> values) {
1665 super(null);
1666 this.values = values;
1667 }
1668 public void accept(Visitor v) { ((ProxyVisitor)v).visitArrayAttributeProxy(this); }
1669 @Override
1670 public String toString() {
1671 return "{" + values + "}";
1672 }
1673 }
1675 /** A temporary proxy representing a compound attribute.
1676 */
1677 static class CompoundAnnotationProxy extends Attribute {
1678 final List<Pair<Name,Attribute>> values;
1679 public CompoundAnnotationProxy(Type type,
1680 List<Pair<Name,Attribute>> values) {
1681 super(type);
1682 this.values = values;
1683 }
1684 public void accept(Visitor v) { ((ProxyVisitor)v).visitCompoundAnnotationProxy(this); }
1685 @Override
1686 public String toString() {
1687 StringBuilder buf = new StringBuilder();
1688 buf.append("@");
1689 buf.append(type.tsym.getQualifiedName());
1690 buf.append("/*proxy*/{");
1691 boolean first = true;
1692 for (List<Pair<Name,Attribute>> v = values;
1693 v.nonEmpty(); v = v.tail) {
1694 Pair<Name,Attribute> value = v.head;
1695 if (!first) buf.append(",");
1696 first = false;
1697 buf.append(value.fst);
1698 buf.append("=");
1699 buf.append(value.snd);
1700 }
1701 buf.append("}");
1702 return buf.toString();
1703 }
1704 }
1706 /** A temporary proxy representing a type annotation.
1707 */
1708 static class TypeAnnotationProxy {
1709 final CompoundAnnotationProxy compound;
1710 final TypeAnnotationPosition position;
1711 public TypeAnnotationProxy(CompoundAnnotationProxy compound,
1712 TypeAnnotationPosition position) {
1713 this.compound = compound;
1714 this.position = position;
1715 }
1716 }
1718 class AnnotationDeproxy implements ProxyVisitor {
1719 private ClassSymbol requestingOwner = currentOwner.kind == MTH
1720 ? currentOwner.enclClass() : (ClassSymbol)currentOwner;
1722 List<Attribute.Compound> deproxyCompoundList(List<CompoundAnnotationProxy> pl) {
1723 // also must fill in types!!!!
1724 ListBuffer<Attribute.Compound> buf =
1725 new ListBuffer<Attribute.Compound>();
1726 for (List<CompoundAnnotationProxy> l = pl; l.nonEmpty(); l=l.tail) {
1727 buf.append(deproxyCompound(l.head));
1728 }
1729 return buf.toList();
1730 }
1732 Attribute.Compound deproxyCompound(CompoundAnnotationProxy a) {
1733 ListBuffer<Pair<Symbol.MethodSymbol,Attribute>> buf =
1734 new ListBuffer<Pair<Symbol.MethodSymbol,Attribute>>();
1735 for (List<Pair<Name,Attribute>> l = a.values;
1736 l.nonEmpty();
1737 l = l.tail) {
1738 MethodSymbol meth = findAccessMethod(a.type, l.head.fst);
1739 buf.append(new Pair<Symbol.MethodSymbol,Attribute>
1740 (meth, deproxy(meth.type.getReturnType(), l.head.snd)));
1741 }
1742 return new Attribute.Compound(a.type, buf.toList());
1743 }
1745 MethodSymbol findAccessMethod(Type container, Name name) {
1746 CompletionFailure failure = null;
1747 try {
1748 for (Scope.Entry e = container.tsym.members().lookup(name);
1749 e.scope != null;
1750 e = e.next()) {
1751 Symbol sym = e.sym;
1752 if (sym.kind == MTH && sym.type.getParameterTypes().length() == 0)
1753 return (MethodSymbol) sym;
1754 }
1755 } catch (CompletionFailure ex) {
1756 failure = ex;
1757 }
1758 // The method wasn't found: emit a warning and recover
1759 JavaFileObject prevSource = log.useSource(requestingOwner.classfile);
1760 try {
1761 if (failure == null) {
1762 log.warning("annotation.method.not.found",
1763 container,
1764 name);
1765 } else {
1766 log.warning("annotation.method.not.found.reason",
1767 container,
1768 name,
1769 failure.getDetailValue());//diagnostic, if present
1770 }
1771 } finally {
1772 log.useSource(prevSource);
1773 }
1774 // Construct a new method type and symbol. Use bottom
1775 // type (typeof null) as return type because this type is
1776 // a subtype of all reference types and can be converted
1777 // to primitive types by unboxing.
1778 MethodType mt = new MethodType(List.<Type>nil(),
1779 syms.botType,
1780 List.<Type>nil(),
1781 syms.methodClass);
1782 return new MethodSymbol(PUBLIC | ABSTRACT, name, mt, container.tsym);
1783 }
1785 Attribute result;
1786 Type type;
1787 Attribute deproxy(Type t, Attribute a) {
1788 Type oldType = type;
1789 try {
1790 type = t;
1791 a.accept(this);
1792 return result;
1793 } finally {
1794 type = oldType;
1795 }
1796 }
1798 // implement Attribute.Visitor below
1800 public void visitConstant(Attribute.Constant value) {
1801 // assert value.type == type;
1802 result = value;
1803 }
1805 public void visitClass(Attribute.Class clazz) {
1806 result = clazz;
1807 }
1809 public void visitEnum(Attribute.Enum e) {
1810 throw new AssertionError(); // shouldn't happen
1811 }
1813 public void visitCompound(Attribute.Compound compound) {
1814 throw new AssertionError(); // shouldn't happen
1815 }
1817 public void visitArray(Attribute.Array array) {
1818 throw new AssertionError(); // shouldn't happen
1819 }
1821 public void visitError(Attribute.Error e) {
1822 throw new AssertionError(); // shouldn't happen
1823 }
1825 public void visitEnumAttributeProxy(EnumAttributeProxy proxy) {
1826 // type.tsym.flatName() should == proxy.enumFlatName
1827 TypeSymbol enumTypeSym = proxy.enumType.tsym;
1828 VarSymbol enumerator = null;
1829 CompletionFailure failure = null;
1830 try {
1831 for (Scope.Entry e = enumTypeSym.members().lookup(proxy.enumerator);
1832 e.scope != null;
1833 e = e.next()) {
1834 if (e.sym.kind == VAR) {
1835 enumerator = (VarSymbol)e.sym;
1836 break;
1837 }
1838 }
1839 }
1840 catch (CompletionFailure ex) {
1841 failure = ex;
1842 }
1843 if (enumerator == null) {
1844 if (failure != null) {
1845 log.warning("unknown.enum.constant.reason",
1846 currentClassFile, enumTypeSym, proxy.enumerator,
1847 failure.getDiagnostic());
1848 } else {
1849 log.warning("unknown.enum.constant",
1850 currentClassFile, enumTypeSym, proxy.enumerator);
1851 }
1852 result = new Attribute.Enum(enumTypeSym.type,
1853 new VarSymbol(0, proxy.enumerator, syms.botType, enumTypeSym));
1854 } else {
1855 result = new Attribute.Enum(enumTypeSym.type, enumerator);
1856 }
1857 }
1859 public void visitArrayAttributeProxy(ArrayAttributeProxy proxy) {
1860 int length = proxy.values.length();
1861 Attribute[] ats = new Attribute[length];
1862 Type elemtype = types.elemtype(type);
1863 int i = 0;
1864 for (List<Attribute> p = proxy.values; p.nonEmpty(); p = p.tail) {
1865 ats[i++] = deproxy(elemtype, p.head);
1866 }
1867 result = new Attribute.Array(type, ats);
1868 }
1870 public void visitCompoundAnnotationProxy(CompoundAnnotationProxy proxy) {
1871 result = deproxyCompound(proxy);
1872 }
1873 }
1875 class AnnotationDefaultCompleter extends AnnotationDeproxy implements Annotate.Worker {
1876 final MethodSymbol sym;
1877 final Attribute value;
1878 final JavaFileObject classFile = currentClassFile;
1879 @Override
1880 public String toString() {
1881 return " ClassReader store default for " + sym.owner + "." + sym + " is " + value;
1882 }
1883 AnnotationDefaultCompleter(MethodSymbol sym, Attribute value) {
1884 this.sym = sym;
1885 this.value = value;
1886 }
1887 // implement Annotate.Worker.run()
1888 public void run() {
1889 JavaFileObject previousClassFile = currentClassFile;
1890 try {
1891 // Reset the interim value set earlier in
1892 // attachAnnotationDefault().
1893 sym.defaultValue = null;
1894 currentClassFile = classFile;
1895 sym.defaultValue = deproxy(sym.type.getReturnType(), value);
1896 } finally {
1897 currentClassFile = previousClassFile;
1898 }
1899 }
1900 }
1902 class AnnotationCompleter extends AnnotationDeproxy implements Annotate.Worker {
1903 final Symbol sym;
1904 final List<CompoundAnnotationProxy> l;
1905 final JavaFileObject classFile;
1906 @Override
1907 public String toString() {
1908 return " ClassReader annotate " + sym.owner + "." + sym + " with " + l;
1909 }
1910 AnnotationCompleter(Symbol sym, List<CompoundAnnotationProxy> l) {
1911 this.sym = sym;
1912 this.l = l;
1913 this.classFile = currentClassFile;
1914 }
1915 // implement Annotate.Worker.run()
1916 public void run() {
1917 JavaFileObject previousClassFile = currentClassFile;
1918 try {
1919 currentClassFile = classFile;
1920 List<Attribute.Compound> newList = deproxyCompoundList(l);
1921 if (sym.annotationsPendingCompletion()) {
1922 sym.setDeclarationAttributes(newList);
1923 } else {
1924 sym.appendAttributes(newList);
1925 }
1926 } finally {
1927 currentClassFile = previousClassFile;
1928 }
1929 }
1930 }
1932 class TypeAnnotationCompleter extends AnnotationCompleter {
1934 List<TypeAnnotationProxy> proxies;
1936 TypeAnnotationCompleter(Symbol sym,
1937 List<TypeAnnotationProxy> proxies) {
1938 super(sym, List.<CompoundAnnotationProxy>nil());
1939 this.proxies = proxies;
1940 }
1942 List<Attribute.TypeCompound> deproxyTypeCompoundList(List<TypeAnnotationProxy> proxies) {
1943 ListBuffer<Attribute.TypeCompound> buf = new ListBuffer<>();
1944 for (TypeAnnotationProxy proxy: proxies) {
1945 Attribute.Compound compound = deproxyCompound(proxy.compound);
1946 Attribute.TypeCompound typeCompound = new Attribute.TypeCompound(compound, proxy.position);
1947 buf.add(typeCompound);
1948 }
1949 return buf.toList();
1950 }
1952 @Override
1953 public void run() {
1954 JavaFileObject previousClassFile = currentClassFile;
1955 try {
1956 currentClassFile = classFile;
1957 List<Attribute.TypeCompound> newList = deproxyTypeCompoundList(proxies);
1958 sym.setTypeAttributes(newList.prependList(sym.getRawTypeAttributes()));
1959 } finally {
1960 currentClassFile = previousClassFile;
1961 }
1962 }
1963 }
1966 /************************************************************************
1967 * Reading Symbols
1968 ***********************************************************************/
1970 /** Read a field.
1971 */
1972 VarSymbol readField() {
1973 long flags = adjustFieldFlags(nextChar());
1974 Name name = readName(nextChar());
1975 Type type = readType(nextChar());
1976 VarSymbol v = new VarSymbol(flags, name, type, currentOwner);
1977 readMemberAttrs(v);
1978 return v;
1979 }
1981 /** Read a method.
1982 */
1983 MethodSymbol readMethod() {
1984 long flags = adjustMethodFlags(nextChar());
1985 Name name = readName(nextChar());
1986 Type type = readType(nextChar());
1987 if (currentOwner.isInterface() &&
1988 (flags & ABSTRACT) == 0 && !name.equals(names.clinit)) {
1989 if (majorVersion > Target.JDK1_8.majorVersion ||
1990 (majorVersion == Target.JDK1_8.majorVersion && minorVersion >= Target.JDK1_8.minorVersion)) {
1991 if ((flags & STATIC) == 0) {
1992 currentOwner.flags_field |= DEFAULT;
1993 flags |= DEFAULT | ABSTRACT;
1994 }
1995 } else {
1996 //protect against ill-formed classfiles
1997 throw badClassFile((flags & STATIC) == 0 ? "invalid.default.interface" : "invalid.static.interface",
1998 Integer.toString(majorVersion),
1999 Integer.toString(minorVersion));
2000 }
2001 }
2002 if (name == names.init && currentOwner.hasOuterInstance()) {
2003 // Sometimes anonymous classes don't have an outer
2004 // instance, however, there is no reliable way to tell so
2005 // we never strip this$n
2006 if (!currentOwner.name.isEmpty())
2007 type = new MethodType(adjustMethodParams(flags, type.getParameterTypes()),
2008 type.getReturnType(),
2009 type.getThrownTypes(),
2010 syms.methodClass);
2011 }
2012 MethodSymbol m = new MethodSymbol(flags, name, type, currentOwner);
2013 if (types.isSignaturePolymorphic(m)) {
2014 m.flags_field |= SIGNATURE_POLYMORPHIC;
2015 }
2016 if (saveParameterNames)
2017 initParameterNames(m);
2018 Symbol prevOwner = currentOwner;
2019 currentOwner = m;
2020 try {
2021 readMemberAttrs(m);
2022 } finally {
2023 currentOwner = prevOwner;
2024 }
2025 if (saveParameterNames)
2026 setParameterNames(m, type);
2027 return m;
2028 }
2030 private List<Type> adjustMethodParams(long flags, List<Type> args) {
2031 boolean isVarargs = (flags & VARARGS) != 0;
2032 if (isVarargs) {
2033 Type varargsElem = args.last();
2034 ListBuffer<Type> adjustedArgs = new ListBuffer<>();
2035 for (Type t : args) {
2036 adjustedArgs.append(t != varargsElem ?
2037 t :
2038 ((ArrayType)t).makeVarargs());
2039 }
2040 args = adjustedArgs.toList();
2041 }
2042 return args.tail;
2043 }
2045 /**
2046 * Init the parameter names array.
2047 * Parameter names are currently inferred from the names in the
2048 * LocalVariableTable attributes of a Code attribute.
2049 * (Note: this means parameter names are currently not available for
2050 * methods without a Code attribute.)
2051 * This method initializes an array in which to store the name indexes
2052 * of parameter names found in LocalVariableTable attributes. It is
2053 * slightly supersized to allow for additional slots with a start_pc of 0.
2054 */
2055 void initParameterNames(MethodSymbol sym) {
2056 // make allowance for synthetic parameters.
2057 final int excessSlots = 4;
2058 int expectedParameterSlots =
2059 Code.width(sym.type.getParameterTypes()) + excessSlots;
2060 if (parameterNameIndices == null
2061 || parameterNameIndices.length < expectedParameterSlots) {
2062 parameterNameIndices = new int[expectedParameterSlots];
2063 } else
2064 Arrays.fill(parameterNameIndices, 0);
2065 haveParameterNameIndices = false;
2066 sawMethodParameters = false;
2067 }
2069 /**
2070 * Set the parameter names for a symbol from the name index in the
2071 * parameterNameIndicies array. The type of the symbol may have changed
2072 * while reading the method attributes (see the Signature attribute).
2073 * This may be because of generic information or because anonymous
2074 * synthetic parameters were added. The original type (as read from
2075 * the method descriptor) is used to help guess the existence of
2076 * anonymous synthetic parameters.
2077 * On completion, sym.savedParameter names will either be null (if
2078 * no parameter names were found in the class file) or will be set to a
2079 * list of names, one per entry in sym.type.getParameterTypes, with
2080 * any missing names represented by the empty name.
2081 */
2082 void setParameterNames(MethodSymbol sym, Type jvmType) {
2083 // if no names were found in the class file, there's nothing more to do
2084 if (!haveParameterNameIndices)
2085 return;
2086 // If we get parameter names from MethodParameters, then we
2087 // don't need to skip.
2088 int firstParam = 0;
2089 if (!sawMethodParameters) {
2090 firstParam = ((sym.flags() & STATIC) == 0) ? 1 : 0;
2091 // the code in readMethod may have skipped the first
2092 // parameter when setting up the MethodType. If so, we
2093 // make a corresponding allowance here for the position of
2094 // the first parameter. Note that this assumes the
2095 // skipped parameter has a width of 1 -- i.e. it is not
2096 // a double width type (long or double.)
2097 if (sym.name == names.init && currentOwner.hasOuterInstance()) {
2098 // Sometimes anonymous classes don't have an outer
2099 // instance, however, there is no reliable way to tell so
2100 // we never strip this$n
2101 if (!currentOwner.name.isEmpty())
2102 firstParam += 1;
2103 }
2105 if (sym.type != jvmType) {
2106 // reading the method attributes has caused the
2107 // symbol's type to be changed. (i.e. the Signature
2108 // attribute.) This may happen if there are hidden
2109 // (synthetic) parameters in the descriptor, but not
2110 // in the Signature. The position of these hidden
2111 // parameters is unspecified; for now, assume they are
2112 // at the beginning, and so skip over them. The
2113 // primary case for this is two hidden parameters
2114 // passed into Enum constructors.
2115 int skip = Code.width(jvmType.getParameterTypes())
2116 - Code.width(sym.type.getParameterTypes());
2117 firstParam += skip;
2118 }
2119 }
2120 List<Name> paramNames = List.nil();
2121 int index = firstParam;
2122 for (Type t: sym.type.getParameterTypes()) {
2123 int nameIdx = (index < parameterNameIndices.length
2124 ? parameterNameIndices[index] : 0);
2125 Name name = nameIdx == 0 ? names.empty : readName(nameIdx);
2126 paramNames = paramNames.prepend(name);
2127 index += Code.width(t);
2128 }
2129 sym.savedParameterNames = paramNames.reverse();
2130 }
2132 /**
2133 * skip n bytes
2134 */
2135 void skipBytes(int n) {
2136 bp = bp + n;
2137 }
2139 /** Skip a field or method
2140 */
2141 void skipMember() {
2142 bp = bp + 6;
2143 char ac = nextChar();
2144 for (int i = 0; i < ac; i++) {
2145 bp = bp + 2;
2146 int attrLen = nextInt();
2147 bp = bp + attrLen;
2148 }
2149 }
2151 /** Enter type variables of this classtype and all enclosing ones in
2152 * `typevars'.
2153 */
2154 protected void enterTypevars(Type t) {
2155 if (t.getEnclosingType() != null && t.getEnclosingType().hasTag(CLASS))
2156 enterTypevars(t.getEnclosingType());
2157 for (List<Type> xs = t.getTypeArguments(); xs.nonEmpty(); xs = xs.tail)
2158 typevars.enter(xs.head.tsym);
2159 }
2161 protected void enterTypevars(Symbol sym) {
2162 if (sym.owner.kind == MTH) {
2163 enterTypevars(sym.owner);
2164 enterTypevars(sym.owner.owner);
2165 }
2166 enterTypevars(sym.type);
2167 }
2169 /** Read contents of a given class symbol `c'. Both external and internal
2170 * versions of an inner class are read.
2171 */
2172 void readClass(ClassSymbol c) {
2173 ClassType ct = (ClassType)c.type;
2175 // allocate scope for members
2176 c.members_field = new Scope(c);
2178 // prepare type variable table
2179 typevars = typevars.dup(currentOwner);
2180 if (ct.getEnclosingType().hasTag(CLASS))
2181 enterTypevars(ct.getEnclosingType());
2183 // read flags, or skip if this is an inner class
2184 long flags = adjustClassFlags(nextChar());
2185 if (c.owner.kind == PCK) c.flags_field = flags;
2187 // read own class name and check that it matches
2188 ClassSymbol self = readClassSymbol(nextChar());
2189 if (c != self)
2190 throw badClassFile("class.file.wrong.class",
2191 self.flatname);
2193 // class attributes must be read before class
2194 // skip ahead to read class attributes
2195 int startbp = bp;
2196 nextChar();
2197 char interfaceCount = nextChar();
2198 bp += interfaceCount * 2;
2199 char fieldCount = nextChar();
2200 for (int i = 0; i < fieldCount; i++) skipMember();
2201 char methodCount = nextChar();
2202 for (int i = 0; i < methodCount; i++) skipMember();
2203 readClassAttrs(c);
2205 if (readAllOfClassFile) {
2206 for (int i = 1; i < poolObj.length; i++) readPool(i);
2207 c.pool = new Pool(poolObj.length, poolObj, types);
2208 }
2210 // reset and read rest of classinfo
2211 bp = startbp;
2212 int n = nextChar();
2213 if (ct.supertype_field == null)
2214 ct.supertype_field = (n == 0)
2215 ? Type.noType
2216 : readClassSymbol(n).erasure(types);
2217 n = nextChar();
2218 List<Type> is = List.nil();
2219 for (int i = 0; i < n; i++) {
2220 Type _inter = readClassSymbol(nextChar()).erasure(types);
2221 is = is.prepend(_inter);
2222 }
2223 if (ct.interfaces_field == null)
2224 ct.interfaces_field = is.reverse();
2226 Assert.check(fieldCount == nextChar());
2227 for (int i = 0; i < fieldCount; i++) enterMember(c, readField());
2228 Assert.check(methodCount == nextChar());
2229 for (int i = 0; i < methodCount; i++) enterMember(c, readMethod());
2231 typevars = typevars.leave();
2232 }
2234 /** Read inner class info. For each inner/outer pair allocate a
2235 * member class.
2236 */
2237 void readInnerClasses(ClassSymbol c) {
2238 int n = nextChar();
2239 for (int i = 0; i < n; i++) {
2240 nextChar(); // skip inner class symbol
2241 ClassSymbol outer = readClassSymbol(nextChar());
2242 Name name = readName(nextChar());
2243 if (name == null) name = names.empty;
2244 long flags = adjustClassFlags(nextChar());
2245 if (outer != null) { // we have a member class
2246 if (name == names.empty)
2247 name = names.one;
2248 ClassSymbol member = enterClass(name, outer);
2249 if ((flags & STATIC) == 0) {
2250 ((ClassType)member.type).setEnclosingType(outer.type);
2251 if (member.erasure_field != null)
2252 ((ClassType)member.erasure_field).setEnclosingType(types.erasure(outer.type));
2253 }
2254 if (c == outer) {
2255 member.flags_field = flags;
2256 enterMember(c, member);
2257 }
2258 }
2259 }
2260 }
2262 /** Read a class file.
2263 */
2264 private void readClassFile(ClassSymbol c) throws IOException {
2265 int magic = nextInt();
2266 if (magic != JAVA_MAGIC)
2267 throw badClassFile("illegal.start.of.class.file");
2269 minorVersion = nextChar();
2270 majorVersion = nextChar();
2271 int maxMajor = Target.MAX().majorVersion;
2272 int maxMinor = Target.MAX().minorVersion;
2273 if (majorVersion > maxMajor ||
2274 majorVersion * 1000 + minorVersion <
2275 Target.MIN().majorVersion * 1000 + Target.MIN().minorVersion)
2276 {
2277 if (majorVersion == (maxMajor + 1))
2278 log.warning("big.major.version",
2279 currentClassFile,
2280 majorVersion,
2281 maxMajor);
2282 else
2283 throw badClassFile("wrong.version",
2284 Integer.toString(majorVersion),
2285 Integer.toString(minorVersion),
2286 Integer.toString(maxMajor),
2287 Integer.toString(maxMinor));
2288 }
2289 else if (checkClassFile &&
2290 majorVersion == maxMajor &&
2291 minorVersion > maxMinor)
2292 {
2293 printCCF("found.later.version",
2294 Integer.toString(minorVersion));
2295 }
2296 indexPool();
2297 if (signatureBuffer.length < bp) {
2298 int ns = Integer.highestOneBit(bp) << 1;
2299 signatureBuffer = new byte[ns];
2300 }
2301 readClass(c);
2302 }
2304 /************************************************************************
2305 * Adjusting flags
2306 ***********************************************************************/
2308 long adjustFieldFlags(long flags) {
2309 return flags;
2310 }
2311 long adjustMethodFlags(long flags) {
2312 if ((flags & ACC_BRIDGE) != 0) {
2313 flags &= ~ACC_BRIDGE;
2314 flags |= BRIDGE;
2315 if (!allowGenerics)
2316 flags &= ~SYNTHETIC;
2317 }
2318 if ((flags & ACC_VARARGS) != 0) {
2319 flags &= ~ACC_VARARGS;
2320 flags |= VARARGS;
2321 }
2322 return flags;
2323 }
2324 long adjustClassFlags(long flags) {
2325 return flags & ~ACC_SUPER; // SUPER and SYNCHRONIZED bits overloaded
2326 }
2328 /************************************************************************
2329 * Loading Classes
2330 ***********************************************************************/
2332 /** Define a new class given its name and owner.
2333 */
2334 public ClassSymbol defineClass(Name name, Symbol owner) {
2335 ClassSymbol c = new ClassSymbol(0, name, owner);
2336 if (owner.kind == PCK)
2337 Assert.checkNull(classes.get(c.flatname), c);
2338 c.completer = thisCompleter;
2339 return c;
2340 }
2342 /** Create a new toplevel or member class symbol with given name
2343 * and owner and enter in `classes' unless already there.
2344 */
2345 public ClassSymbol enterClass(Name name, TypeSymbol owner) {
2346 Name flatname = TypeSymbol.formFlatName(name, owner);
2347 ClassSymbol c = classes.get(flatname);
2348 if (c == null) {
2349 c = defineClass(name, owner);
2350 classes.put(flatname, c);
2351 } else if ((c.name != name || c.owner != owner) && owner.kind == TYP && c.owner.kind == PCK) {
2352 // reassign fields of classes that might have been loaded with
2353 // their flat names.
2354 c.owner.members().remove(c);
2355 c.name = name;
2356 c.owner = owner;
2357 c.fullname = ClassSymbol.formFullName(name, owner);
2358 }
2359 return c;
2360 }
2362 /**
2363 * Creates a new toplevel class symbol with given flat name and
2364 * given class (or source) file.
2365 *
2366 * @param flatName a fully qualified binary class name
2367 * @param classFile the class file or compilation unit defining
2368 * the class (may be {@code null})
2369 * @return a newly created class symbol
2370 * @throws AssertionError if the class symbol already exists
2371 */
2372 public ClassSymbol enterClass(Name flatName, JavaFileObject classFile) {
2373 ClassSymbol cs = classes.get(flatName);
2374 if (cs != null) {
2375 String msg = Log.format("%s: completer = %s; class file = %s; source file = %s",
2376 cs.fullname,
2377 cs.completer,
2378 cs.classfile,
2379 cs.sourcefile);
2380 throw new AssertionError(msg);
2381 }
2382 Name packageName = Convert.packagePart(flatName);
2383 PackageSymbol owner = packageName.isEmpty()
2384 ? syms.unnamedPackage
2385 : enterPackage(packageName);
2386 cs = defineClass(Convert.shortName(flatName), owner);
2387 cs.classfile = classFile;
2388 classes.put(flatName, cs);
2389 return cs;
2390 }
2392 /** Create a new member or toplevel class symbol with given flat name
2393 * and enter in `classes' unless already there.
2394 */
2395 public ClassSymbol enterClass(Name flatname) {
2396 ClassSymbol c = classes.get(flatname);
2397 if (c == null)
2398 return enterClass(flatname, (JavaFileObject)null);
2399 else
2400 return c;
2401 }
2403 /** Completion for classes to be loaded. Before a class is loaded
2404 * we make sure its enclosing class (if any) is loaded.
2405 */
2406 private void complete(Symbol sym) throws CompletionFailure {
2407 if (sym.kind == TYP) {
2408 ClassSymbol c = (ClassSymbol)sym;
2409 c.members_field = new Scope.ErrorScope(c); // make sure it's always defined
2410 annotate.enterStart();
2411 try {
2412 completeOwners(c.owner);
2413 completeEnclosing(c);
2414 } finally {
2415 // The flush needs to happen only after annotations
2416 // are filled in.
2417 annotate.enterDoneWithoutFlush();
2418 }
2419 fillIn(c);
2420 } else if (sym.kind == PCK) {
2421 PackageSymbol p = (PackageSymbol)sym;
2422 try {
2423 fillIn(p);
2424 } catch (IOException ex) {
2425 throw new CompletionFailure(sym, ex.getLocalizedMessage()).initCause(ex);
2426 }
2427 }
2428 if (!filling)
2429 annotate.flush(); // finish attaching annotations
2430 }
2432 /** complete up through the enclosing package. */
2433 private void completeOwners(Symbol o) {
2434 if (o.kind != PCK) completeOwners(o.owner);
2435 o.complete();
2436 }
2438 /**
2439 * Tries to complete lexically enclosing classes if c looks like a
2440 * nested class. This is similar to completeOwners but handles
2441 * the situation when a nested class is accessed directly as it is
2442 * possible with the Tree API or javax.lang.model.*.
2443 */
2444 private void completeEnclosing(ClassSymbol c) {
2445 if (c.owner.kind == PCK) {
2446 Symbol owner = c.owner;
2447 for (Name name : Convert.enclosingCandidates(Convert.shortName(c.name))) {
2448 Symbol encl = owner.members().lookup(name).sym;
2449 if (encl == null)
2450 encl = classes.get(TypeSymbol.formFlatName(name, owner));
2451 if (encl != null)
2452 encl.complete();
2453 }
2454 }
2455 }
2457 /** We can only read a single class file at a time; this
2458 * flag keeps track of when we are currently reading a class
2459 * file.
2460 */
2461 private boolean filling = false;
2463 /** Fill in definition of class `c' from corresponding class or
2464 * source file.
2465 */
2466 private void fillIn(ClassSymbol c) {
2467 if (completionFailureName == c.fullname) {
2468 throw new CompletionFailure(c, "user-selected completion failure by class name");
2469 }
2470 currentOwner = c;
2471 warnedAttrs.clear();
2472 JavaFileObject classfile = c.classfile;
2473 if (classfile != null) {
2474 JavaFileObject previousClassFile = currentClassFile;
2475 try {
2476 if (filling) {
2477 Assert.error("Filling " + classfile.toUri() + " during " + previousClassFile);
2478 }
2479 currentClassFile = classfile;
2480 if (verbose) {
2481 log.printVerbose("loading", currentClassFile.toString());
2482 }
2483 if (classfile.getKind() == JavaFileObject.Kind.CLASS) {
2484 filling = true;
2485 try {
2486 bp = 0;
2487 buf = readInputStream(buf, classfile.openInputStream());
2488 readClassFile(c);
2489 if (!missingTypeVariables.isEmpty() && !foundTypeVariables.isEmpty()) {
2490 List<Type> missing = missingTypeVariables;
2491 List<Type> found = foundTypeVariables;
2492 missingTypeVariables = List.nil();
2493 foundTypeVariables = List.nil();
2494 filling = false;
2495 ClassType ct = (ClassType)currentOwner.type;
2496 ct.supertype_field =
2497 types.subst(ct.supertype_field, missing, found);
2498 ct.interfaces_field =
2499 types.subst(ct.interfaces_field, missing, found);
2500 } else if (missingTypeVariables.isEmpty() !=
2501 foundTypeVariables.isEmpty()) {
2502 Name name = missingTypeVariables.head.tsym.name;
2503 throw badClassFile("undecl.type.var", name);
2504 }
2505 } finally {
2506 missingTypeVariables = List.nil();
2507 foundTypeVariables = List.nil();
2508 filling = false;
2509 }
2510 } else {
2511 if (sourceCompleter != null) {
2512 sourceCompleter.complete(c);
2513 } else {
2514 throw new IllegalStateException("Source completer required to read "
2515 + classfile.toUri());
2516 }
2517 }
2518 return;
2519 } catch (IOException ex) {
2520 throw badClassFile("unable.to.access.file", ex.getMessage());
2521 } finally {
2522 currentClassFile = previousClassFile;
2523 }
2524 } else {
2525 JCDiagnostic diag =
2526 diagFactory.fragment("class.file.not.found", c.flatname);
2527 throw
2528 newCompletionFailure(c, diag);
2529 }
2530 }
2531 // where
2532 private static byte[] readInputStream(byte[] buf, InputStream s) throws IOException {
2533 try {
2534 buf = ensureCapacity(buf, s.available());
2535 int r = s.read(buf);
2536 int bp = 0;
2537 while (r != -1) {
2538 bp += r;
2539 buf = ensureCapacity(buf, bp);
2540 r = s.read(buf, bp, buf.length - bp);
2541 }
2542 return buf;
2543 } finally {
2544 try {
2545 s.close();
2546 } catch (IOException e) {
2547 /* Ignore any errors, as this stream may have already
2548 * thrown a related exception which is the one that
2549 * should be reported.
2550 */
2551 }
2552 }
2553 }
2554 /*
2555 * ensureCapacity will increase the buffer as needed, taking note that
2556 * the new buffer will always be greater than the needed and never
2557 * exactly equal to the needed size or bp. If equal then the read (above)
2558 * will infinitely loop as buf.length - bp == 0.
2559 */
2560 private static byte[] ensureCapacity(byte[] buf, int needed) {
2561 if (buf.length <= needed) {
2562 byte[] old = buf;
2563 buf = new byte[Integer.highestOneBit(needed) << 1];
2564 System.arraycopy(old, 0, buf, 0, old.length);
2565 }
2566 return buf;
2567 }
2568 /** Static factory for CompletionFailure objects.
2569 * In practice, only one can be used at a time, so we share one
2570 * to reduce the expense of allocating new exception objects.
2571 */
2572 private CompletionFailure newCompletionFailure(TypeSymbol c,
2573 JCDiagnostic diag) {
2574 if (!cacheCompletionFailure) {
2575 // log.warning("proc.messager",
2576 // Log.getLocalizedString("class.file.not.found", c.flatname));
2577 // c.debug.printStackTrace();
2578 return new CompletionFailure(c, diag);
2579 } else {
2580 CompletionFailure result = cachedCompletionFailure;
2581 result.sym = c;
2582 result.diag = diag;
2583 return result;
2584 }
2585 }
2586 private CompletionFailure cachedCompletionFailure =
2587 new CompletionFailure(null, (JCDiagnostic) null);
2588 {
2589 cachedCompletionFailure.setStackTrace(new StackTraceElement[0]);
2590 }
2592 /** Load a toplevel class with given fully qualified name
2593 * The class is entered into `classes' only if load was successful.
2594 */
2595 public ClassSymbol loadClass(Name flatname) throws CompletionFailure {
2596 boolean absent = classes.get(flatname) == null;
2597 ClassSymbol c = enterClass(flatname);
2598 if (c.members_field == null && c.completer != null) {
2599 try {
2600 c.complete();
2601 } catch (CompletionFailure ex) {
2602 if (absent) classes.remove(flatname);
2603 throw ex;
2604 }
2605 }
2606 return c;
2607 }
2609 /************************************************************************
2610 * Loading Packages
2611 ***********************************************************************/
2613 /** Check to see if a package exists, given its fully qualified name.
2614 */
2615 public boolean packageExists(Name fullname) {
2616 return enterPackage(fullname).exists();
2617 }
2619 /** Make a package, given its fully qualified name.
2620 */
2621 public PackageSymbol enterPackage(Name fullname) {
2622 PackageSymbol p = packages.get(fullname);
2623 if (p == null) {
2624 Assert.check(!fullname.isEmpty(), "rootPackage missing!");
2625 p = new PackageSymbol(
2626 Convert.shortName(fullname),
2627 enterPackage(Convert.packagePart(fullname)));
2628 p.completer = thisCompleter;
2629 packages.put(fullname, p);
2630 }
2631 return p;
2632 }
2634 /** Make a package, given its unqualified name and enclosing package.
2635 */
2636 public PackageSymbol enterPackage(Name name, PackageSymbol owner) {
2637 return enterPackage(TypeSymbol.formFullName(name, owner));
2638 }
2640 /** Include class corresponding to given class file in package,
2641 * unless (1) we already have one the same kind (.class or .java), or
2642 * (2) we have one of the other kind, and the given class file
2643 * is older.
2644 */
2645 protected void includeClassFile(PackageSymbol p, JavaFileObject file) {
2646 if ((p.flags_field & EXISTS) == 0)
2647 for (Symbol q = p; q != null && q.kind == PCK; q = q.owner)
2648 q.flags_field |= EXISTS;
2649 JavaFileObject.Kind kind = file.getKind();
2650 int seen;
2651 if (kind == JavaFileObject.Kind.CLASS)
2652 seen = CLASS_SEEN;
2653 else
2654 seen = SOURCE_SEEN;
2655 String binaryName = fileManager.inferBinaryName(currentLoc, file);
2656 int lastDot = binaryName.lastIndexOf(".");
2657 Name classname = names.fromString(binaryName.substring(lastDot + 1));
2658 boolean isPkgInfo = classname == names.package_info;
2659 ClassSymbol c = isPkgInfo
2660 ? p.package_info
2661 : (ClassSymbol) p.members_field.lookup(classname).sym;
2662 if (c == null) {
2663 c = enterClass(classname, p);
2664 if (c.classfile == null) // only update the file if's it's newly created
2665 c.classfile = file;
2666 if (isPkgInfo) {
2667 p.package_info = c;
2668 } else {
2669 if (c.owner == p) // it might be an inner class
2670 p.members_field.enter(c);
2671 }
2672 } else if (c.classfile != null && (c.flags_field & seen) == 0) {
2673 // if c.classfile == null, we are currently compiling this class
2674 // and no further action is necessary.
2675 // if (c.flags_field & seen) != 0, we have already encountered
2676 // a file of the same kind; again no further action is necessary.
2677 if ((c.flags_field & (CLASS_SEEN | SOURCE_SEEN)) != 0)
2678 c.classfile = preferredFileObject(file, c.classfile);
2679 }
2680 c.flags_field |= seen;
2681 }
2683 /** Implement policy to choose to derive information from a source
2684 * file or a class file when both are present. May be overridden
2685 * by subclasses.
2686 */
2687 protected JavaFileObject preferredFileObject(JavaFileObject a,
2688 JavaFileObject b) {
2690 if (preferSource)
2691 return (a.getKind() == JavaFileObject.Kind.SOURCE) ? a : b;
2692 else {
2693 long adate = a.getLastModified();
2694 long bdate = b.getLastModified();
2695 // 6449326: policy for bad lastModifiedTime in ClassReader
2696 //assert adate >= 0 && bdate >= 0;
2697 return (adate > bdate) ? a : b;
2698 }
2699 }
2701 /**
2702 * specifies types of files to be read when filling in a package symbol
2703 */
2704 protected EnumSet<JavaFileObject.Kind> getPackageFileKinds() {
2705 return EnumSet.of(JavaFileObject.Kind.CLASS, JavaFileObject.Kind.SOURCE);
2706 }
2708 /**
2709 * this is used to support javadoc
2710 */
2711 protected void extraFileActions(PackageSymbol pack, JavaFileObject fe) {
2712 }
2714 protected Location currentLoc; // FIXME
2716 private boolean verbosePath = true;
2718 /** Load directory of package into members scope.
2719 */
2720 private void fillIn(PackageSymbol p) throws IOException {
2721 if (p.members_field == null) p.members_field = new Scope(p);
2722 String packageName = p.fullname.toString();
2724 Set<JavaFileObject.Kind> kinds = getPackageFileKinds();
2726 fillIn(p, PLATFORM_CLASS_PATH,
2727 fileManager.list(PLATFORM_CLASS_PATH,
2728 packageName,
2729 EnumSet.of(JavaFileObject.Kind.CLASS),
2730 false));
2732 Set<JavaFileObject.Kind> classKinds = EnumSet.copyOf(kinds);
2733 classKinds.remove(JavaFileObject.Kind.SOURCE);
2734 boolean wantClassFiles = !classKinds.isEmpty();
2736 Set<JavaFileObject.Kind> sourceKinds = EnumSet.copyOf(kinds);
2737 sourceKinds.remove(JavaFileObject.Kind.CLASS);
2738 boolean wantSourceFiles = !sourceKinds.isEmpty();
2740 boolean haveSourcePath = fileManager.hasLocation(SOURCE_PATH);
2742 if (verbose && verbosePath) {
2743 if (fileManager instanceof StandardJavaFileManager) {
2744 StandardJavaFileManager fm = (StandardJavaFileManager)fileManager;
2745 if (haveSourcePath && wantSourceFiles) {
2746 List<File> path = List.nil();
2747 for (File file : fm.getLocation(SOURCE_PATH)) {
2748 path = path.prepend(file);
2749 }
2750 log.printVerbose("sourcepath", path.reverse().toString());
2751 } else if (wantSourceFiles) {
2752 List<File> path = List.nil();
2753 for (File file : fm.getLocation(CLASS_PATH)) {
2754 path = path.prepend(file);
2755 }
2756 log.printVerbose("sourcepath", path.reverse().toString());
2757 }
2758 if (wantClassFiles) {
2759 List<File> path = List.nil();
2760 for (File file : fm.getLocation(PLATFORM_CLASS_PATH)) {
2761 path = path.prepend(file);
2762 }
2763 for (File file : fm.getLocation(CLASS_PATH)) {
2764 path = path.prepend(file);
2765 }
2766 log.printVerbose("classpath", path.reverse().toString());
2767 }
2768 }
2769 }
2771 if (wantSourceFiles && !haveSourcePath) {
2772 fillIn(p, CLASS_PATH,
2773 fileManager.list(CLASS_PATH,
2774 packageName,
2775 kinds,
2776 false));
2777 } else {
2778 if (wantClassFiles)
2779 fillIn(p, CLASS_PATH,
2780 fileManager.list(CLASS_PATH,
2781 packageName,
2782 classKinds,
2783 false));
2784 if (wantSourceFiles)
2785 fillIn(p, SOURCE_PATH,
2786 fileManager.list(SOURCE_PATH,
2787 packageName,
2788 sourceKinds,
2789 false));
2790 }
2791 verbosePath = false;
2792 }
2793 // where
2794 private void fillIn(PackageSymbol p,
2795 Location location,
2796 Iterable<JavaFileObject> files)
2797 {
2798 currentLoc = location;
2799 for (JavaFileObject fo : files) {
2800 switch (fo.getKind()) {
2801 case CLASS:
2802 case SOURCE: {
2803 // TODO pass binaryName to includeClassFile
2804 String binaryName = fileManager.inferBinaryName(currentLoc, fo);
2805 String simpleName = binaryName.substring(binaryName.lastIndexOf(".") + 1);
2806 if (SourceVersion.isIdentifier(simpleName) ||
2807 simpleName.equals("package-info"))
2808 includeClassFile(p, fo);
2809 break;
2810 }
2811 default:
2812 extraFileActions(p, fo);
2813 }
2814 }
2815 }
2817 /** Output for "-checkclassfile" option.
2818 * @param key The key to look up the correct internationalized string.
2819 * @param arg An argument for substitution into the output string.
2820 */
2821 private void printCCF(String key, Object arg) {
2822 log.printLines(key, arg);
2823 }
2826 public interface SourceCompleter {
2827 void complete(ClassSymbol sym)
2828 throws CompletionFailure;
2829 }
2831 /**
2832 * A subclass of JavaFileObject for the sourcefile attribute found in a classfile.
2833 * The attribute is only the last component of the original filename, so is unlikely
2834 * to be valid as is, so operations other than those to access the name throw
2835 * UnsupportedOperationException
2836 */
2837 private static class SourceFileObject extends BaseFileObject {
2839 /** The file's name.
2840 */
2841 private Name name;
2842 private Name flatname;
2844 public SourceFileObject(Name name, Name flatname) {
2845 super(null); // no file manager; never referenced for this file object
2846 this.name = name;
2847 this.flatname = flatname;
2848 }
2850 @Override
2851 public URI toUri() {
2852 try {
2853 return new URI(null, name.toString(), null);
2854 } catch (URISyntaxException e) {
2855 throw new CannotCreateUriError(name.toString(), e);
2856 }
2857 }
2859 @Override
2860 public String getName() {
2861 return name.toString();
2862 }
2864 @Override
2865 public String getShortName() {
2866 return getName();
2867 }
2869 @Override
2870 public JavaFileObject.Kind getKind() {
2871 return getKind(getName());
2872 }
2874 @Override
2875 public InputStream openInputStream() {
2876 throw new UnsupportedOperationException();
2877 }
2879 @Override
2880 public OutputStream openOutputStream() {
2881 throw new UnsupportedOperationException();
2882 }
2884 @Override
2885 public CharBuffer getCharContent(boolean ignoreEncodingErrors) {
2886 throw new UnsupportedOperationException();
2887 }
2889 @Override
2890 public Reader openReader(boolean ignoreEncodingErrors) {
2891 throw new UnsupportedOperationException();
2892 }
2894 @Override
2895 public Writer openWriter() {
2896 throw new UnsupportedOperationException();
2897 }
2899 @Override
2900 public long getLastModified() {
2901 throw new UnsupportedOperationException();
2902 }
2904 @Override
2905 public boolean delete() {
2906 throw new UnsupportedOperationException();
2907 }
2909 @Override
2910 protected String inferBinaryName(Iterable<? extends File> path) {
2911 return flatname.toString();
2912 }
2914 @Override
2915 public boolean isNameCompatible(String simpleName, JavaFileObject.Kind kind) {
2916 return true; // fail-safe mode
2917 }
2919 /**
2920 * Check if two file objects are equal.
2921 * SourceFileObjects are just placeholder objects for the value of a
2922 * SourceFile attribute, and do not directly represent specific files.
2923 * Two SourceFileObjects are equal if their names are equal.
2924 */
2925 @Override
2926 public boolean equals(Object other) {
2927 if (this == other)
2928 return true;
2930 if (!(other instanceof SourceFileObject))
2931 return false;
2933 SourceFileObject o = (SourceFileObject) other;
2934 return name.equals(o.name);
2935 }
2937 @Override
2938 public int hashCode() {
2939 return name.hashCode();
2940 }
2941 }
2942 }
