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src/share/classes/com/sun/tools/javac/jvm/ClassReader.java@03944ee4fac4
src/share/classes/com/sun/tools/javac/jvm/ClassReader.java
Fri, 26 Jun 2009 18:51:39 -0700
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- jjg
- date
- Fri, 26 Jun 2009 18:51:39 -0700
- changeset 308
- 03944ee4fac4
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- e2722bd43f3a
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6843077: JSR 308: Annotations on types
Reviewed-by: jjg, mcimadamore, darcy
Contributed-by: mernst@cs.washington.edu, mali@csail.mit.edu, mpapi@csail.mit.edu
1 /*
2 * Copyright 1999-2008 Sun Microsystems, Inc. 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. Sun designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
22 * CA 95054 USA or visit www.sun.com if you need additional information or
23 * have any questions.
24 */
26 package com.sun.tools.javac.jvm;
28 import java.io.*;
29 import java.net.URI;
30 import java.nio.CharBuffer;
31 import java.util.EnumSet;
32 import java.util.HashMap;
33 import java.util.Map;
34 import java.util.Set;
35 import javax.lang.model.SourceVersion;
36 import javax.tools.JavaFileObject;
37 import javax.tools.JavaFileManager;
38 import javax.tools.JavaFileManager.Location;
39 import javax.tools.StandardJavaFileManager;
41 import static javax.tools.StandardLocation.*;
43 import com.sun.tools.javac.comp.Annotate;
44 import com.sun.tools.javac.code.*;
45 import com.sun.tools.javac.code.Type.*;
46 import com.sun.tools.javac.code.Symbol.*;
47 import com.sun.tools.javac.code.Symtab;
48 import com.sun.tools.javac.file.BaseFileObject;
49 import com.sun.tools.javac.util.*;
51 import static com.sun.tools.javac.code.Flags.*;
52 import static com.sun.tools.javac.code.Kinds.*;
53 import static com.sun.tools.javac.code.TypeTags.*;
54 import static com.sun.tools.javac.jvm.ClassFile.*;
55 import static com.sun.tools.javac.jvm.ClassFile.Version.*;
57 /** This class provides operations to read a classfile into an internal
58 * representation. The internal representation is anchored in a
59 * ClassSymbol which contains in its scope symbol representations
60 * for all other definitions in the classfile. Top-level Classes themselves
61 * appear as members of the scopes of PackageSymbols.
62 *
63 * <p><b>This is NOT part of any API supported by Sun Microsystems. If
64 * you write code that depends on this, you do so at your own risk.
65 * This code and its internal interfaces are subject to change or
66 * deletion without notice.</b>
67 */
68 public class ClassReader implements Completer {
69 /** The context key for the class reader. */
70 protected static final Context.Key<ClassReader> classReaderKey =
71 new Context.Key<ClassReader>();
73 Annotate annotate;
75 /** Switch: verbose output.
76 */
77 boolean verbose;
79 /** Switch: check class file for correct minor version, unrecognized
80 * attributes.
81 */
82 boolean checkClassFile;
84 /** Switch: read constant pool and code sections. This switch is initially
85 * set to false but can be turned on from outside.
86 */
87 public boolean readAllOfClassFile = false;
89 /** Switch: read GJ signature information.
90 */
91 boolean allowGenerics;
93 /** Switch: read varargs attribute.
94 */
95 boolean allowVarargs;
97 /** Switch: allow annotations.
98 */
99 boolean allowAnnotations;
101 /** Switch: preserve parameter names from the variable table.
102 */
103 public boolean saveParameterNames;
105 /**
106 * Switch: cache completion failures unless -XDdev is used
107 */
108 private boolean cacheCompletionFailure;
110 /**
111 * Switch: prefer source files instead of newer when both source
112 * and class are available
113 **/
114 public boolean preferSource;
116 /** The log to use for verbose output
117 */
118 final Log log;
120 /** The symbol table. */
121 Symtab syms;
123 Types types;
125 /** The name table. */
126 final Names names;
128 /** Force a completion failure on this name
129 */
130 final Name completionFailureName;
132 /** Access to files
133 */
134 private final JavaFileManager fileManager;
136 /** Factory for diagnostics
137 */
138 JCDiagnostic.Factory diagFactory;
140 /** Can be reassigned from outside:
141 * the completer to be used for ".java" files. If this remains unassigned
142 * ".java" files will not be loaded.
143 */
144 public SourceCompleter sourceCompleter = null;
146 /** A hashtable containing the encountered top-level and member classes,
147 * indexed by flat names. The table does not contain local classes.
148 */
149 private Map<Name,ClassSymbol> classes;
151 /** A hashtable containing the encountered packages.
152 */
153 private Map<Name, PackageSymbol> packages;
155 /** The current scope where type variables are entered.
156 */
157 protected Scope typevars;
159 /** The path name of the class file currently being read.
160 */
161 protected JavaFileObject currentClassFile = null;
163 /** The class or method currently being read.
164 */
165 protected Symbol currentOwner = null;
167 /** The buffer containing the currently read class file.
168 */
169 byte[] buf = new byte[0x0fff0];
171 /** The current input pointer.
172 */
173 int bp;
175 /** The objects of the constant pool.
176 */
177 Object[] poolObj;
179 /** For every constant pool entry, an index into buf where the
180 * defining section of the entry is found.
181 */
182 int[] poolIdx;
184 /** The major version number of the class file being read. */
185 int majorVersion;
186 /** The minor version number of the class file being read. */
187 int minorVersion;
189 /** Switch: debug output for JSR 308-related operations.
190 */
191 boolean debugJSR308;
193 /** Get the ClassReader instance for this invocation. */
194 public static ClassReader instance(Context context) {
195 ClassReader instance = context.get(classReaderKey);
196 if (instance == null)
197 instance = new ClassReader(context, true);
198 return instance;
199 }
201 /** Initialize classes and packages, treating this as the definitive classreader. */
202 public void init(Symtab syms) {
203 init(syms, true);
204 }
206 /** Initialize classes and packages, optionally treating this as
207 * the definitive classreader.
208 */
209 private void init(Symtab syms, boolean definitive) {
210 if (classes != null) return;
212 if (definitive) {
213 assert packages == null || packages == syms.packages;
214 packages = syms.packages;
215 assert classes == null || classes == syms.classes;
216 classes = syms.classes;
217 } else {
218 packages = new HashMap<Name, PackageSymbol>();
219 classes = new HashMap<Name, ClassSymbol>();
220 }
222 packages.put(names.empty, syms.rootPackage);
223 syms.rootPackage.completer = this;
224 syms.unnamedPackage.completer = this;
225 }
227 /** Construct a new class reader, optionally treated as the
228 * definitive classreader for this invocation.
229 */
230 protected ClassReader(Context context, boolean definitive) {
231 if (definitive) context.put(classReaderKey, this);
233 names = Names.instance(context);
234 syms = Symtab.instance(context);
235 types = Types.instance(context);
236 fileManager = context.get(JavaFileManager.class);
237 if (fileManager == null)
238 throw new AssertionError("FileManager initialization error");
239 diagFactory = JCDiagnostic.Factory.instance(context);
241 init(syms, definitive);
242 log = Log.instance(context);
244 Options options = Options.instance(context);
245 annotate = Annotate.instance(context);
246 verbose = options.get("-verbose") != null;
247 checkClassFile = options.get("-checkclassfile") != null;
248 Source source = Source.instance(context);
249 allowGenerics = source.allowGenerics();
250 allowVarargs = source.allowVarargs();
251 allowAnnotations = source.allowAnnotations();
252 saveParameterNames = options.get("save-parameter-names") != null;
253 cacheCompletionFailure = options.get("dev") == null;
254 preferSource = "source".equals(options.get("-Xprefer"));
256 completionFailureName =
257 (options.get("failcomplete") != null)
258 ? names.fromString(options.get("failcomplete"))
259 : null;
261 typevars = new Scope(syms.noSymbol);
262 debugJSR308 = options.get("TA:reader") != null;
264 initAttributeReaders();
265 }
267 /** Add member to class unless it is synthetic.
268 */
269 private void enterMember(ClassSymbol c, Symbol sym) {
270 if ((sym.flags_field & (SYNTHETIC|BRIDGE)) != SYNTHETIC)
271 c.members_field.enter(sym);
272 }
274 /************************************************************************
275 * Error Diagnoses
276 ***********************************************************************/
279 public class BadClassFile extends CompletionFailure {
280 private static final long serialVersionUID = 0;
282 public BadClassFile(TypeSymbol sym, JavaFileObject file, JCDiagnostic diag) {
283 super(sym, createBadClassFileDiagnostic(file, diag));
284 }
285 }
286 // where
287 private JCDiagnostic createBadClassFileDiagnostic(JavaFileObject file, JCDiagnostic diag) {
288 String key = (file.getKind() == JavaFileObject.Kind.SOURCE
289 ? "bad.source.file.header" : "bad.class.file.header");
290 return diagFactory.fragment(key, file, diag);
291 }
293 public BadClassFile badClassFile(String key, Object... args) {
294 return new BadClassFile (
295 currentOwner.enclClass(),
296 currentClassFile,
297 diagFactory.fragment(key, args));
298 }
300 /************************************************************************
301 * Buffer Access
302 ***********************************************************************/
304 /** Read a character.
305 */
306 char nextChar() {
307 return (char)(((buf[bp++] & 0xFF) << 8) + (buf[bp++] & 0xFF));
308 }
310 /** Read a byte.
311 */
312 byte nextByte() {
313 return buf[bp++];
314 }
316 /** Read an integer.
317 */
318 int nextInt() {
319 return
320 ((buf[bp++] & 0xFF) << 24) +
321 ((buf[bp++] & 0xFF) << 16) +
322 ((buf[bp++] & 0xFF) << 8) +
323 (buf[bp++] & 0xFF);
324 }
326 /** Extract a character at position bp from buf.
327 */
328 char getChar(int bp) {
329 return
330 (char)(((buf[bp] & 0xFF) << 8) + (buf[bp+1] & 0xFF));
331 }
333 /** Extract an integer at position bp from buf.
334 */
335 int getInt(int bp) {
336 return
337 ((buf[bp] & 0xFF) << 24) +
338 ((buf[bp+1] & 0xFF) << 16) +
339 ((buf[bp+2] & 0xFF) << 8) +
340 (buf[bp+3] & 0xFF);
341 }
344 /** Extract a long integer at position bp from buf.
345 */
346 long getLong(int bp) {
347 DataInputStream bufin =
348 new DataInputStream(new ByteArrayInputStream(buf, bp, 8));
349 try {
350 return bufin.readLong();
351 } catch (IOException e) {
352 throw new AssertionError(e);
353 }
354 }
356 /** Extract a float at position bp from buf.
357 */
358 float getFloat(int bp) {
359 DataInputStream bufin =
360 new DataInputStream(new ByteArrayInputStream(buf, bp, 4));
361 try {
362 return bufin.readFloat();
363 } catch (IOException e) {
364 throw new AssertionError(e);
365 }
366 }
368 /** Extract a double at position bp from buf.
369 */
370 double getDouble(int bp) {
371 DataInputStream bufin =
372 new DataInputStream(new ByteArrayInputStream(buf, bp, 8));
373 try {
374 return bufin.readDouble();
375 } catch (IOException e) {
376 throw new AssertionError(e);
377 }
378 }
380 /************************************************************************
381 * Constant Pool Access
382 ***********************************************************************/
384 /** Index all constant pool entries, writing their start addresses into
385 * poolIdx.
386 */
387 void indexPool() {
388 poolIdx = new int[nextChar()];
389 poolObj = new Object[poolIdx.length];
390 int i = 1;
391 while (i < poolIdx.length) {
392 poolIdx[i++] = bp;
393 byte tag = buf[bp++];
394 switch (tag) {
395 case CONSTANT_Utf8: case CONSTANT_Unicode: {
396 int len = nextChar();
397 bp = bp + len;
398 break;
399 }
400 case CONSTANT_Class:
401 case CONSTANT_String:
402 bp = bp + 2;
403 break;
404 case CONSTANT_Fieldref:
405 case CONSTANT_Methodref:
406 case CONSTANT_InterfaceMethodref:
407 case CONSTANT_NameandType:
408 case CONSTANT_Integer:
409 case CONSTANT_Float:
410 bp = bp + 4;
411 break;
412 case CONSTANT_Long:
413 case CONSTANT_Double:
414 bp = bp + 8;
415 i++;
416 break;
417 default:
418 throw badClassFile("bad.const.pool.tag.at",
419 Byte.toString(tag),
420 Integer.toString(bp -1));
421 }
422 }
423 }
425 /** Read constant pool entry at start address i, use pool as a cache.
426 */
427 Object readPool(int i) {
428 Object result = poolObj[i];
429 if (result != null) return result;
431 int index = poolIdx[i];
432 if (index == 0) return null;
434 byte tag = buf[index];
435 switch (tag) {
436 case CONSTANT_Utf8:
437 poolObj[i] = names.fromUtf(buf, index + 3, getChar(index + 1));
438 break;
439 case CONSTANT_Unicode:
440 throw badClassFile("unicode.str.not.supported");
441 case CONSTANT_Class:
442 poolObj[i] = readClassOrType(getChar(index + 1));
443 break;
444 case CONSTANT_String:
445 // FIXME: (footprint) do not use toString here
446 poolObj[i] = readName(getChar(index + 1)).toString();
447 break;
448 case CONSTANT_Fieldref: {
449 ClassSymbol owner = readClassSymbol(getChar(index + 1));
450 NameAndType nt = (NameAndType)readPool(getChar(index + 3));
451 poolObj[i] = new VarSymbol(0, nt.name, nt.type, owner);
452 break;
453 }
454 case CONSTANT_Methodref:
455 case CONSTANT_InterfaceMethodref: {
456 ClassSymbol owner = readClassSymbol(getChar(index + 1));
457 NameAndType nt = (NameAndType)readPool(getChar(index + 3));
458 poolObj[i] = new MethodSymbol(0, nt.name, nt.type, owner);
459 break;
460 }
461 case CONSTANT_NameandType:
462 poolObj[i] = new NameAndType(
463 readName(getChar(index + 1)),
464 readType(getChar(index + 3)));
465 break;
466 case CONSTANT_Integer:
467 poolObj[i] = getInt(index + 1);
468 break;
469 case CONSTANT_Float:
470 poolObj[i] = new Float(getFloat(index + 1));
471 break;
472 case CONSTANT_Long:
473 poolObj[i] = new Long(getLong(index + 1));
474 break;
475 case CONSTANT_Double:
476 poolObj[i] = new Double(getDouble(index + 1));
477 break;
478 default:
479 throw badClassFile("bad.const.pool.tag", Byte.toString(tag));
480 }
481 return poolObj[i];
482 }
484 /** Read signature and convert to type.
485 */
486 Type readType(int i) {
487 int index = poolIdx[i];
488 return sigToType(buf, index + 3, getChar(index + 1));
489 }
491 /** If name is an array type or class signature, return the
492 * corresponding type; otherwise return a ClassSymbol with given name.
493 */
494 Object readClassOrType(int i) {
495 int index = poolIdx[i];
496 int len = getChar(index + 1);
497 int start = index + 3;
498 assert buf[start] == '[' || buf[start + len - 1] != ';';
499 // by the above assertion, the following test can be
500 // simplified to (buf[start] == '[')
501 return (buf[start] == '[' || buf[start + len - 1] == ';')
502 ? (Object)sigToType(buf, start, len)
503 : (Object)enterClass(names.fromUtf(internalize(buf, start,
504 len)));
505 }
507 /** Read signature and convert to type parameters.
508 */
509 List<Type> readTypeParams(int i) {
510 int index = poolIdx[i];
511 return sigToTypeParams(buf, index + 3, getChar(index + 1));
512 }
514 /** Read class entry.
515 */
516 ClassSymbol readClassSymbol(int i) {
517 return (ClassSymbol) (readPool(i));
518 }
520 /** Read name.
521 */
522 Name readName(int i) {
523 return (Name) (readPool(i));
524 }
526 /************************************************************************
527 * Reading Types
528 ***********************************************************************/
530 /** The unread portion of the currently read type is
531 * signature[sigp..siglimit-1].
532 */
533 byte[] signature;
534 int sigp;
535 int siglimit;
536 boolean sigEnterPhase = false;
538 /** Convert signature to type, where signature is a byte array segment.
539 */
540 Type sigToType(byte[] sig, int offset, int len) {
541 signature = sig;
542 sigp = offset;
543 siglimit = offset + len;
544 return sigToType();
545 }
547 /** Convert signature to type, where signature is implicit.
548 */
549 Type sigToType() {
550 switch ((char) signature[sigp]) {
551 case 'T':
552 sigp++;
553 int start = sigp;
554 while (signature[sigp] != ';') sigp++;
555 sigp++;
556 return sigEnterPhase
557 ? Type.noType
558 : findTypeVar(names.fromUtf(signature, start, sigp - 1 - start));
559 case '+': {
560 sigp++;
561 Type t = sigToType();
562 return new WildcardType(t, BoundKind.EXTENDS,
563 syms.boundClass);
564 }
565 case '*':
566 sigp++;
567 return new WildcardType(syms.objectType, BoundKind.UNBOUND,
568 syms.boundClass);
569 case '-': {
570 sigp++;
571 Type t = sigToType();
572 return new WildcardType(t, BoundKind.SUPER,
573 syms.boundClass);
574 }
575 case 'B':
576 sigp++;
577 return syms.byteType;
578 case 'C':
579 sigp++;
580 return syms.charType;
581 case 'D':
582 sigp++;
583 return syms.doubleType;
584 case 'F':
585 sigp++;
586 return syms.floatType;
587 case 'I':
588 sigp++;
589 return syms.intType;
590 case 'J':
591 sigp++;
592 return syms.longType;
593 case 'L':
594 {
595 // int oldsigp = sigp;
596 Type t = classSigToType();
597 if (sigp < siglimit && signature[sigp] == '.')
598 throw badClassFile("deprecated inner class signature syntax " +
599 "(please recompile from source)");
600 /*
601 System.err.println(" decoded " +
602 new String(signature, oldsigp, sigp-oldsigp) +
603 " => " + t + " outer " + t.outer());
604 */
605 return t;
606 }
607 case 'S':
608 sigp++;
609 return syms.shortType;
610 case 'V':
611 sigp++;
612 return syms.voidType;
613 case 'Z':
614 sigp++;
615 return syms.booleanType;
616 case '[':
617 sigp++;
618 return new ArrayType(sigToType(), syms.arrayClass);
619 case '(':
620 sigp++;
621 List<Type> argtypes = sigToTypes(')');
622 Type restype = sigToType();
623 List<Type> thrown = List.nil();
624 while (signature[sigp] == '^') {
625 sigp++;
626 thrown = thrown.prepend(sigToType());
627 }
628 return new MethodType(argtypes,
629 restype,
630 thrown.reverse(),
631 syms.methodClass);
632 case '<':
633 typevars = typevars.dup(currentOwner);
634 Type poly = new ForAll(sigToTypeParams(), sigToType());
635 typevars = typevars.leave();
636 return poly;
637 default:
638 throw badClassFile("bad.signature",
639 Convert.utf2string(signature, sigp, 10));
640 }
641 }
643 byte[] signatureBuffer = new byte[0];
644 int sbp = 0;
645 /** Convert class signature to type, where signature is implicit.
646 */
647 Type classSigToType() {
648 if (signature[sigp] != 'L')
649 throw badClassFile("bad.class.signature",
650 Convert.utf2string(signature, sigp, 10));
651 sigp++;
652 Type outer = Type.noType;
653 int startSbp = sbp;
655 while (true) {
656 final byte c = signature[sigp++];
657 switch (c) {
659 case ';': { // end
660 ClassSymbol t = enterClass(names.fromUtf(signatureBuffer,
661 startSbp,
662 sbp - startSbp));
663 if (outer == Type.noType)
664 outer = t.erasure(types);
665 else
666 outer = new ClassType(outer, List.<Type>nil(), t);
667 sbp = startSbp;
668 return outer;
669 }
671 case '<': // generic arguments
672 ClassSymbol t = enterClass(names.fromUtf(signatureBuffer,
673 startSbp,
674 sbp - startSbp));
675 outer = new ClassType(outer, sigToTypes('>'), t) {
676 boolean completed = false;
677 @Override
678 public Type getEnclosingType() {
679 if (!completed) {
680 completed = true;
681 tsym.complete();
682 Type enclosingType = tsym.type.getEnclosingType();
683 if (enclosingType != Type.noType) {
684 List<Type> typeArgs =
685 super.getEnclosingType().allparams();
686 List<Type> typeParams =
687 enclosingType.allparams();
688 if (typeParams.length() != typeArgs.length()) {
689 // no "rare" types
690 super.setEnclosingType(types.erasure(enclosingType));
691 } else {
692 super.setEnclosingType(types.subst(enclosingType,
693 typeParams,
694 typeArgs));
695 }
696 } else {
697 super.setEnclosingType(Type.noType);
698 }
699 }
700 return super.getEnclosingType();
701 }
702 @Override
703 public void setEnclosingType(Type outer) {
704 throw new UnsupportedOperationException();
705 }
706 };
707 switch (signature[sigp++]) {
708 case ';':
709 if (sigp < signature.length && signature[sigp] == '.') {
710 // support old-style GJC signatures
711 // The signature produced was
712 // Lfoo/Outer<Lfoo/X;>;.Lfoo/Outer$Inner<Lfoo/Y;>;
713 // rather than say
714 // Lfoo/Outer<Lfoo/X;>.Inner<Lfoo/Y;>;
715 // so we skip past ".Lfoo/Outer$"
716 sigp += (sbp - startSbp) + // "foo/Outer"
717 3; // ".L" and "$"
718 signatureBuffer[sbp++] = (byte)'$';
719 break;
720 } else {
721 sbp = startSbp;
722 return outer;
723 }
724 case '.':
725 signatureBuffer[sbp++] = (byte)'$';
726 break;
727 default:
728 throw new AssertionError(signature[sigp-1]);
729 }
730 continue;
732 case '.':
733 signatureBuffer[sbp++] = (byte)'$';
734 continue;
735 case '/':
736 signatureBuffer[sbp++] = (byte)'.';
737 continue;
738 default:
739 signatureBuffer[sbp++] = c;
740 continue;
741 }
742 }
743 }
745 /** Convert (implicit) signature to list of types
746 * until `terminator' is encountered.
747 */
748 List<Type> sigToTypes(char terminator) {
749 List<Type> head = List.of(null);
750 List<Type> tail = head;
751 while (signature[sigp] != terminator)
752 tail = tail.setTail(List.of(sigToType()));
753 sigp++;
754 return head.tail;
755 }
757 /** Convert signature to type parameters, where signature is a byte
758 * array segment.
759 */
760 List<Type> sigToTypeParams(byte[] sig, int offset, int len) {
761 signature = sig;
762 sigp = offset;
763 siglimit = offset + len;
764 return sigToTypeParams();
765 }
767 /** Convert signature to type parameters, where signature is implicit.
768 */
769 List<Type> sigToTypeParams() {
770 List<Type> tvars = List.nil();
771 if (signature[sigp] == '<') {
772 sigp++;
773 int start = sigp;
774 sigEnterPhase = true;
775 while (signature[sigp] != '>')
776 tvars = tvars.prepend(sigToTypeParam());
777 sigEnterPhase = false;
778 sigp = start;
779 while (signature[sigp] != '>')
780 sigToTypeParam();
781 sigp++;
782 }
783 return tvars.reverse();
784 }
786 /** Convert (implicit) signature to type parameter.
787 */
788 Type sigToTypeParam() {
789 int start = sigp;
790 while (signature[sigp] != ':') sigp++;
791 Name name = names.fromUtf(signature, start, sigp - start);
792 TypeVar tvar;
793 if (sigEnterPhase) {
794 tvar = new TypeVar(name, currentOwner, syms.botType);
795 typevars.enter(tvar.tsym);
796 } else {
797 tvar = (TypeVar)findTypeVar(name);
798 }
799 List<Type> bounds = List.nil();
800 Type st = null;
801 if (signature[sigp] == ':' && signature[sigp+1] == ':') {
802 sigp++;
803 st = syms.objectType;
804 }
805 while (signature[sigp] == ':') {
806 sigp++;
807 bounds = bounds.prepend(sigToType());
808 }
809 if (!sigEnterPhase) {
810 types.setBounds(tvar, bounds.reverse(), st);
811 }
812 return tvar;
813 }
815 /** Find type variable with given name in `typevars' scope.
816 */
817 Type findTypeVar(Name name) {
818 Scope.Entry e = typevars.lookup(name);
819 if (e.scope != null) {
820 return e.sym.type;
821 } else {
822 if (readingClassAttr) {
823 // While reading the class attribute, the supertypes
824 // might refer to a type variable from an enclosing element
825 // (method or class).
826 // If the type variable is defined in the enclosing class,
827 // we can actually find it in
828 // currentOwner.owner.type.getTypeArguments()
829 // However, until we have read the enclosing method attribute
830 // we don't know for sure if this owner is correct. It could
831 // be a method and there is no way to tell before reading the
832 // enclosing method attribute.
833 TypeVar t = new TypeVar(name, currentOwner, syms.botType);
834 missingTypeVariables = missingTypeVariables.prepend(t);
835 // System.err.println("Missing type var " + name);
836 return t;
837 }
838 throw badClassFile("undecl.type.var", name);
839 }
840 }
842 /************************************************************************
843 * Reading Attributes
844 ***********************************************************************/
846 protected enum AttributeKind { CLASS, MEMBER };
847 protected abstract class AttributeReader {
848 AttributeReader(Name name, Version version, Set<AttributeKind> kinds) {
849 this.name = name;
850 this.version = version;
851 this.kinds = kinds;
852 }
854 boolean accepts(AttributeKind kind) {
855 return kinds.contains(kind) && majorVersion >= version.major;
856 }
858 abstract void read(Symbol sym, int attrLen);
860 final Name name;
861 final Version version;
862 final Set<AttributeKind> kinds;
863 }
865 protected Set<AttributeKind> CLASS_ATTRIBUTE =
866 EnumSet.of(AttributeKind.CLASS);
867 protected Set<AttributeKind> MEMBER_ATTRIBUTE =
868 EnumSet.of(AttributeKind.MEMBER);
869 protected Set<AttributeKind> CLASS_OR_MEMBER_ATTRIBUTE =
870 EnumSet.of(AttributeKind.CLASS, AttributeKind.MEMBER);
872 protected Map<Name, AttributeReader> attributeReaders = new HashMap<Name, AttributeReader>();
874 protected void initAttributeReaders() {
875 AttributeReader[] readers = {
876 // v45.3 attributes
878 new AttributeReader(names.Code, V45_3, MEMBER_ATTRIBUTE) {
879 void read(Symbol sym, int attrLen) {
880 if (readAllOfClassFile || saveParameterNames)
881 ((MethodSymbol)sym).code = readCode(sym);
882 else
883 bp = bp + attrLen;
884 }
885 },
887 new AttributeReader(names.ConstantValue, V45_3, MEMBER_ATTRIBUTE) {
888 void read(Symbol sym, int attrLen) {
889 Object v = readPool(nextChar());
890 // Ignore ConstantValue attribute if field not final.
891 if ((sym.flags() & FINAL) != 0)
892 ((VarSymbol) sym).setData(v);
893 }
894 },
896 new AttributeReader(names.Deprecated, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) {
897 void read(Symbol sym, int attrLen) {
898 sym.flags_field |= DEPRECATED;
899 }
900 },
902 new AttributeReader(names.Exceptions, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) {
903 void read(Symbol sym, int attrLen) {
904 int nexceptions = nextChar();
905 List<Type> thrown = List.nil();
906 for (int j = 0; j < nexceptions; j++)
907 thrown = thrown.prepend(readClassSymbol(nextChar()).type);
908 if (sym.type.getThrownTypes().isEmpty())
909 sym.type.asMethodType().thrown = thrown.reverse();
910 }
911 },
913 new AttributeReader(names.InnerClasses, V45_3, CLASS_ATTRIBUTE) {
914 void read(Symbol sym, int attrLen) {
915 ClassSymbol c = (ClassSymbol) sym;
916 readInnerClasses(c);
917 }
918 },
920 new AttributeReader(names.LocalVariableTable, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) {
921 void read(Symbol sym, int attrLen) {
922 int newbp = bp + attrLen;
923 if (saveParameterNames) {
924 // pick up parameter names from the variable table
925 List<Name> parameterNames = List.nil();
926 int firstParam = ((sym.flags() & STATIC) == 0) ? 1 : 0;
927 int endParam = firstParam + Code.width(sym.type.getParameterTypes());
928 int numEntries = nextChar();
929 for (int i=0; i<numEntries; i++) {
930 int start_pc = nextChar();
931 int length = nextChar();
932 int nameIndex = nextChar();
933 int sigIndex = nextChar();
934 int register = nextChar();
935 if (start_pc == 0 &&
936 firstParam <= register &&
937 register < endParam) {
938 int index = firstParam;
939 for (Type t : sym.type.getParameterTypes()) {
940 if (index == register) {
941 parameterNames = parameterNames.prepend(readName(nameIndex));
942 break;
943 }
944 index += Code.width(t);
945 }
946 }
947 }
948 parameterNames = parameterNames.reverse();
949 ((MethodSymbol)sym).savedParameterNames = parameterNames;
950 }
951 bp = newbp;
952 }
953 },
955 new AttributeReader(names.SourceFile, V45_3, CLASS_ATTRIBUTE) {
956 void read(Symbol sym, int attrLen) {
957 ClassSymbol c = (ClassSymbol) sym;
958 Name n = readName(nextChar());
959 c.sourcefile = new SourceFileObject(n, c.flatname);
960 }
961 },
963 new AttributeReader(names.Synthetic, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) {
964 void read(Symbol sym, int attrLen) {
965 // bridge methods are visible when generics not enabled
966 if (allowGenerics || (sym.flags_field & BRIDGE) == 0)
967 sym.flags_field |= SYNTHETIC;
968 }
969 },
971 // standard v49 attributes
973 new AttributeReader(names.EnclosingMethod, V49, CLASS_ATTRIBUTE) {
974 void read(Symbol sym, int attrLen) {
975 int newbp = bp + attrLen;
976 readEnclosingMethodAttr(sym);
977 bp = newbp;
978 }
979 },
981 new AttributeReader(names.Signature, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
982 @Override
983 boolean accepts(AttributeKind kind) {
984 return super.accepts(kind) && allowGenerics;
985 }
987 void read(Symbol sym, int attrLen) {
988 if (sym.kind == TYP) {
989 ClassSymbol c = (ClassSymbol) sym;
990 readingClassAttr = true;
991 try {
992 ClassType ct1 = (ClassType)c.type;
993 assert c == currentOwner;
994 ct1.typarams_field = readTypeParams(nextChar());
995 ct1.supertype_field = sigToType();
996 ListBuffer<Type> is = new ListBuffer<Type>();
997 while (sigp != siglimit) is.append(sigToType());
998 ct1.interfaces_field = is.toList();
999 } finally {
1000 readingClassAttr = false;
1001 }
1002 } else {
1003 List<Type> thrown = sym.type.getThrownTypes();
1004 sym.type = readType(nextChar());
1005 //- System.err.println(" # " + sym.type);
1006 if (sym.kind == MTH && sym.type.getThrownTypes().isEmpty())
1007 sym.type.asMethodType().thrown = thrown;
1009 }
1010 }
1011 },
1013 // v49 annotation attributes
1015 new AttributeReader(names.AnnotationDefault, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1016 void read(Symbol sym, int attrLen) {
1017 attachAnnotationDefault(sym);
1018 }
1019 },
1021 new AttributeReader(names.RuntimeInvisibleAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1022 void read(Symbol sym, int attrLen) {
1023 attachAnnotations(sym);
1024 }
1025 },
1027 new AttributeReader(names.RuntimeInvisibleParameterAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1028 void read(Symbol sym, int attrLen) {
1029 attachParameterAnnotations(sym);
1030 }
1031 },
1033 new AttributeReader(names.RuntimeVisibleAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1034 void read(Symbol sym, int attrLen) {
1035 attachAnnotations(sym);
1036 }
1037 },
1039 new AttributeReader(names.RuntimeVisibleParameterAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1040 void read(Symbol sym, int attrLen) {
1041 attachParameterAnnotations(sym);
1042 }
1043 },
1045 // additional "legacy" v49 attributes, superceded by flags
1047 new AttributeReader(names.Annotation, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1048 void read(Symbol sym, int attrLen) {
1049 if (allowAnnotations)
1050 sym.flags_field |= ANNOTATION;
1051 }
1052 },
1054 new AttributeReader(names.Bridge, V49, MEMBER_ATTRIBUTE) {
1055 void read(Symbol sym, int attrLen) {
1056 sym.flags_field |= BRIDGE;
1057 if (!allowGenerics)
1058 sym.flags_field &= ~SYNTHETIC;
1059 }
1060 },
1062 new AttributeReader(names.Enum, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1063 void read(Symbol sym, int attrLen) {
1064 sym.flags_field |= ENUM;
1065 }
1066 },
1068 new AttributeReader(names.Varargs, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1069 void read(Symbol sym, int attrLen) {
1070 if (allowVarargs)
1071 sym.flags_field |= VARARGS;
1072 }
1073 },
1075 // v51 attributes
1076 new AttributeReader(names.RuntimeVisibleTypeAnnotations, V51, CLASS_OR_MEMBER_ATTRIBUTE) {
1077 void read(Symbol sym, int attrLen) {
1078 attachTypeAnnotations(sym);
1079 }
1080 },
1082 new AttributeReader(names.RuntimeInvisibleTypeAnnotations, V51, CLASS_OR_MEMBER_ATTRIBUTE) {
1083 void read(Symbol sym, int attrLen) {
1084 attachTypeAnnotations(sym);
1085 }
1086 },
1089 // The following attributes for a Code attribute are not currently handled
1090 // StackMapTable
1091 // SourceDebugExtension
1092 // LineNumberTable
1093 // LocalVariableTypeTable
1094 };
1096 for (AttributeReader r: readers)
1097 attributeReaders.put(r.name, r);
1098 }
1100 /** Report unrecognized attribute.
1101 */
1102 void unrecognized(Name attrName) {
1103 if (checkClassFile)
1104 printCCF("ccf.unrecognized.attribute", attrName);
1105 }
1109 void readEnclosingMethodAttr(Symbol sym) {
1110 // sym is a nested class with an "Enclosing Method" attribute
1111 // remove sym from it's current owners scope and place it in
1112 // the scope specified by the attribute
1113 sym.owner.members().remove(sym);
1114 ClassSymbol self = (ClassSymbol)sym;
1115 ClassSymbol c = readClassSymbol(nextChar());
1116 NameAndType nt = (NameAndType)readPool(nextChar());
1118 MethodSymbol m = findMethod(nt, c.members_field, self.flags());
1119 if (nt != null && m == null)
1120 throw badClassFile("bad.enclosing.method", self);
1122 self.name = simpleBinaryName(self.flatname, c.flatname) ;
1123 self.owner = m != null ? m : c;
1124 if (self.name.isEmpty())
1125 self.fullname = null;
1126 else
1127 self.fullname = ClassSymbol.formFullName(self.name, self.owner);
1129 if (m != null) {
1130 ((ClassType)sym.type).setEnclosingType(m.type);
1131 } else if ((self.flags_field & STATIC) == 0) {
1132 ((ClassType)sym.type).setEnclosingType(c.type);
1133 } else {
1134 ((ClassType)sym.type).setEnclosingType(Type.noType);
1135 }
1136 enterTypevars(self);
1137 if (!missingTypeVariables.isEmpty()) {
1138 ListBuffer<Type> typeVars = new ListBuffer<Type>();
1139 for (Type typevar : missingTypeVariables) {
1140 typeVars.append(findTypeVar(typevar.tsym.name));
1141 }
1142 foundTypeVariables = typeVars.toList();
1143 } else {
1144 foundTypeVariables = List.nil();
1145 }
1146 }
1148 // See java.lang.Class
1149 private Name simpleBinaryName(Name self, Name enclosing) {
1150 String simpleBinaryName = self.toString().substring(enclosing.toString().length());
1151 if (simpleBinaryName.length() < 1 || simpleBinaryName.charAt(0) != '$')
1152 throw badClassFile("bad.enclosing.method", self);
1153 int index = 1;
1154 while (index < simpleBinaryName.length() &&
1155 isAsciiDigit(simpleBinaryName.charAt(index)))
1156 index++;
1157 return names.fromString(simpleBinaryName.substring(index));
1158 }
1160 private MethodSymbol findMethod(NameAndType nt, Scope scope, long flags) {
1161 if (nt == null)
1162 return null;
1164 MethodType type = nt.type.asMethodType();
1166 for (Scope.Entry e = scope.lookup(nt.name); e.scope != null; e = e.next())
1167 if (e.sym.kind == MTH && isSameBinaryType(e.sym.type.asMethodType(), type))
1168 return (MethodSymbol)e.sym;
1170 if (nt.name != names.init)
1171 // not a constructor
1172 return null;
1173 if ((flags & INTERFACE) != 0)
1174 // no enclosing instance
1175 return null;
1176 if (nt.type.getParameterTypes().isEmpty())
1177 // no parameters
1178 return null;
1180 // A constructor of an inner class.
1181 // Remove the first argument (the enclosing instance)
1182 nt.type = new MethodType(nt.type.getParameterTypes().tail,
1183 nt.type.getReturnType(),
1184 nt.type.getThrownTypes(),
1185 syms.methodClass);
1186 // Try searching again
1187 return findMethod(nt, scope, flags);
1188 }
1190 /** Similar to Types.isSameType but avoids completion */
1191 private boolean isSameBinaryType(MethodType mt1, MethodType mt2) {
1192 List<Type> types1 = types.erasure(mt1.getParameterTypes())
1193 .prepend(types.erasure(mt1.getReturnType()));
1194 List<Type> types2 = mt2.getParameterTypes().prepend(mt2.getReturnType());
1195 while (!types1.isEmpty() && !types2.isEmpty()) {
1196 if (types1.head.tsym != types2.head.tsym)
1197 return false;
1198 types1 = types1.tail;
1199 types2 = types2.tail;
1200 }
1201 return types1.isEmpty() && types2.isEmpty();
1202 }
1204 /**
1205 * Character.isDigit answers <tt>true</tt> to some non-ascii
1206 * digits. This one does not. <b>copied from java.lang.Class</b>
1207 */
1208 private static boolean isAsciiDigit(char c) {
1209 return '0' <= c && c <= '9';
1210 }
1212 /** Read member attributes.
1213 */
1214 void readMemberAttrs(Symbol sym) {
1215 readAttrs(sym, AttributeKind.MEMBER);
1216 }
1218 void readAttrs(Symbol sym, AttributeKind kind) {
1219 char ac = nextChar();
1220 for (int i = 0; i < ac; i++) {
1221 Name attrName = readName(nextChar());
1222 int attrLen = nextInt();
1223 AttributeReader r = attributeReaders.get(attrName);
1224 if (r != null && r.accepts(kind))
1225 r.read(sym, attrLen);
1226 else {
1227 unrecognized(attrName);
1228 bp = bp + attrLen;
1229 }
1230 }
1231 }
1233 private boolean readingClassAttr = false;
1234 private List<Type> missingTypeVariables = List.nil();
1235 private List<Type> foundTypeVariables = List.nil();
1237 /** Read class attributes.
1238 */
1239 void readClassAttrs(ClassSymbol c) {
1240 readAttrs(c, AttributeKind.CLASS);
1241 }
1243 /** Read code block.
1244 */
1245 Code readCode(Symbol owner) {
1246 nextChar(); // max_stack
1247 nextChar(); // max_locals
1248 final int code_length = nextInt();
1249 bp += code_length;
1250 final char exception_table_length = nextChar();
1251 bp += exception_table_length * 8;
1252 readMemberAttrs(owner);
1253 return null;
1254 }
1256 /************************************************************************
1257 * Reading Java-language annotations
1258 ***********************************************************************/
1260 /** Attach annotations.
1261 */
1262 void attachAnnotations(final Symbol sym) {
1263 int numAttributes = nextChar();
1264 if (numAttributes != 0) {
1265 ListBuffer<CompoundAnnotationProxy> proxies =
1266 new ListBuffer<CompoundAnnotationProxy>();
1267 for (int i = 0; i<numAttributes; i++) {
1268 CompoundAnnotationProxy proxy = readCompoundAnnotation();
1269 if (proxy.type.tsym == syms.proprietaryType.tsym)
1270 sym.flags_field |= PROPRIETARY;
1271 else
1272 proxies.append(proxy);
1273 }
1274 annotate.later(new AnnotationCompleter(sym, proxies.toList()));
1275 }
1276 }
1278 /** Attach parameter annotations.
1279 */
1280 void attachParameterAnnotations(final Symbol method) {
1281 final MethodSymbol meth = (MethodSymbol)method;
1282 int numParameters = buf[bp++] & 0xFF;
1283 List<VarSymbol> parameters = meth.params();
1284 int pnum = 0;
1285 while (parameters.tail != null) {
1286 attachAnnotations(parameters.head);
1287 parameters = parameters.tail;
1288 pnum++;
1289 }
1290 if (pnum != numParameters) {
1291 throw badClassFile("bad.runtime.invisible.param.annotations", meth);
1292 }
1293 }
1295 void attachTypeAnnotations(final Symbol sym) {
1296 int numAttributes = nextChar();
1297 if (numAttributes != 0) {
1298 ListBuffer<TypeAnnotationProxy> proxies =
1299 ListBuffer.lb();
1300 for (int i = 0; i < numAttributes; i++)
1301 proxies.append(readTypeAnnotation());
1302 annotate.later(new TypeAnnotationCompleter(sym, proxies.toList()));
1303 }
1304 }
1306 /** Attach the default value for an annotation element.
1307 */
1308 void attachAnnotationDefault(final Symbol sym) {
1309 final MethodSymbol meth = (MethodSymbol)sym; // only on methods
1310 final Attribute value = readAttributeValue();
1311 annotate.later(new AnnotationDefaultCompleter(meth, value));
1312 }
1314 Type readTypeOrClassSymbol(int i) {
1315 // support preliminary jsr175-format class files
1316 if (buf[poolIdx[i]] == CONSTANT_Class)
1317 return readClassSymbol(i).type;
1318 return readType(i);
1319 }
1320 Type readEnumType(int i) {
1321 // support preliminary jsr175-format class files
1322 int index = poolIdx[i];
1323 int length = getChar(index + 1);
1324 if (buf[index + length + 2] != ';')
1325 return enterClass(readName(i)).type;
1326 return readType(i);
1327 }
1329 CompoundAnnotationProxy readCompoundAnnotation() {
1330 Type t = readTypeOrClassSymbol(nextChar());
1331 int numFields = nextChar();
1332 ListBuffer<Pair<Name,Attribute>> pairs =
1333 new ListBuffer<Pair<Name,Attribute>>();
1334 for (int i=0; i<numFields; i++) {
1335 Name name = readName(nextChar());
1336 Attribute value = readAttributeValue();
1337 pairs.append(new Pair<Name,Attribute>(name, value));
1338 }
1339 return new CompoundAnnotationProxy(t, pairs.toList());
1340 }
1342 TypeAnnotationProxy readTypeAnnotation() {
1343 CompoundAnnotationProxy proxy = readCompoundAnnotation();
1344 TypeAnnotationPosition position = readPosition();
1346 if (debugJSR308)
1347 System.out.println("TA: reading: " + proxy + " @ " + position
1348 + " in " + log.currentSourceFile());
1350 return new TypeAnnotationProxy(proxy, position);
1351 }
1353 TypeAnnotationPosition readPosition() {
1354 byte tag = nextByte();
1356 if (!TargetType.isValidTargetTypeValue(tag))
1357 throw this.badClassFile("bad.type.annotation.value", tag);
1359 TypeAnnotationPosition position = new TypeAnnotationPosition();
1360 TargetType type = TargetType.fromTargetTypeValue(tag);
1362 position.type = type;
1364 switch (type) {
1365 // type case
1366 case TYPECAST:
1367 case TYPECAST_GENERIC_OR_ARRAY:
1368 // object creation
1369 case INSTANCEOF:
1370 case INSTANCEOF_GENERIC_OR_ARRAY:
1371 // new expression
1372 case NEW:
1373 case NEW_GENERIC_OR_ARRAY:
1374 position.offset = nextChar();
1375 break;
1376 // local variable
1377 case LOCAL_VARIABLE:
1378 case LOCAL_VARIABLE_GENERIC_OR_ARRAY:
1379 int table_length = nextChar();
1380 position.lvarOffset = new int[table_length];
1381 position.lvarLength = new int[table_length];
1382 position.lvarIndex = new int[table_length];
1384 for (int i = 0; i < table_length; ++i) {
1385 position.lvarOffset[i] = nextChar();
1386 position.lvarLength[i] = nextChar();
1387 position.lvarIndex[i] = nextChar();
1388 }
1389 break;
1390 // method receiver
1391 case METHOD_RECEIVER:
1392 // Do nothing
1393 break;
1394 // type parameters
1395 case CLASS_TYPE_PARAMETER:
1396 case METHOD_TYPE_PARAMETER:
1397 position.parameter_index = nextByte();
1398 break;
1399 // type parameter bounds
1400 case CLASS_TYPE_PARAMETER_BOUND:
1401 case CLASS_TYPE_PARAMETER_BOUND_GENERIC_OR_ARRAY:
1402 case METHOD_TYPE_PARAMETER_BOUND:
1403 case METHOD_TYPE_PARAMETER_BOUND_GENERIC_OR_ARRAY:
1404 position.parameter_index = nextByte();
1405 position.bound_index = nextByte();
1406 break;
1407 // wildcard
1408 case WILDCARD_BOUND:
1409 case WILDCARD_BOUND_GENERIC_OR_ARRAY:
1410 position.wildcard_position = readPosition();
1411 break;
1412 // Class extends and implements clauses
1413 case CLASS_EXTENDS:
1414 case CLASS_EXTENDS_GENERIC_OR_ARRAY:
1415 position.type_index = nextByte();
1416 break;
1417 // throws
1418 case THROWS:
1419 position.type_index = nextByte();
1420 break;
1421 case CLASS_LITERAL:
1422 case CLASS_LITERAL_GENERIC_OR_ARRAY:
1423 position.offset = nextChar();
1424 break;
1425 // method parameter: not specified
1426 case METHOD_PARAMETER_GENERIC_OR_ARRAY:
1427 position.parameter_index = nextByte();
1428 break;
1429 // method type argument: wasn't specified
1430 case NEW_TYPE_ARGUMENT:
1431 case NEW_TYPE_ARGUMENT_GENERIC_OR_ARRAY:
1432 case METHOD_TYPE_ARGUMENT:
1433 case METHOD_TYPE_ARGUMENT_GENERIC_OR_ARRAY:
1434 position.offset = nextChar();
1435 position.type_index = nextByte();
1436 break;
1437 // We don't need to worry abut these
1438 case METHOD_RETURN_GENERIC_OR_ARRAY:
1439 case FIELD_GENERIC_OR_ARRAY:
1440 break;
1441 case UNKNOWN:
1442 break;
1443 default:
1444 throw new AssertionError("unknown type: " + position);
1445 }
1447 if (type.hasLocation()) {
1448 int len = nextChar();
1449 ListBuffer<Integer> loc = ListBuffer.lb();
1450 for (int i = 0; i < len; i++)
1451 loc = loc.append((int)nextByte());
1452 position.location = loc.toList();
1453 }
1455 return position;
1456 }
1457 Attribute readAttributeValue() {
1458 char c = (char) buf[bp++];
1459 switch (c) {
1460 case 'B':
1461 return new Attribute.Constant(syms.byteType, readPool(nextChar()));
1462 case 'C':
1463 return new Attribute.Constant(syms.charType, readPool(nextChar()));
1464 case 'D':
1465 return new Attribute.Constant(syms.doubleType, readPool(nextChar()));
1466 case 'F':
1467 return new Attribute.Constant(syms.floatType, readPool(nextChar()));
1468 case 'I':
1469 return new Attribute.Constant(syms.intType, readPool(nextChar()));
1470 case 'J':
1471 return new Attribute.Constant(syms.longType, readPool(nextChar()));
1472 case 'S':
1473 return new Attribute.Constant(syms.shortType, readPool(nextChar()));
1474 case 'Z':
1475 return new Attribute.Constant(syms.booleanType, readPool(nextChar()));
1476 case 's':
1477 return new Attribute.Constant(syms.stringType, readPool(nextChar()).toString());
1478 case 'e':
1479 return new EnumAttributeProxy(readEnumType(nextChar()), readName(nextChar()));
1480 case 'c':
1481 return new Attribute.Class(types, readTypeOrClassSymbol(nextChar()));
1482 case '[': {
1483 int n = nextChar();
1484 ListBuffer<Attribute> l = new ListBuffer<Attribute>();
1485 for (int i=0; i<n; i++)
1486 l.append(readAttributeValue());
1487 return new ArrayAttributeProxy(l.toList());
1488 }
1489 case '@':
1490 return readCompoundAnnotation();
1491 default:
1492 throw new AssertionError("unknown annotation tag '" + c + "'");
1493 }
1494 }
1496 interface ProxyVisitor extends Attribute.Visitor {
1497 void visitEnumAttributeProxy(EnumAttributeProxy proxy);
1498 void visitArrayAttributeProxy(ArrayAttributeProxy proxy);
1499 void visitCompoundAnnotationProxy(CompoundAnnotationProxy proxy);
1500 }
1502 static class EnumAttributeProxy extends Attribute {
1503 Type enumType;
1504 Name enumerator;
1505 public EnumAttributeProxy(Type enumType, Name enumerator) {
1506 super(null);
1507 this.enumType = enumType;
1508 this.enumerator = enumerator;
1509 }
1510 public void accept(Visitor v) { ((ProxyVisitor)v).visitEnumAttributeProxy(this); }
1511 @Override
1512 public String toString() {
1513 return "/*proxy enum*/" + enumType + "." + enumerator;
1514 }
1515 }
1517 static class ArrayAttributeProxy extends Attribute {
1518 List<Attribute> values;
1519 ArrayAttributeProxy(List<Attribute> values) {
1520 super(null);
1521 this.values = values;
1522 }
1523 public void accept(Visitor v) { ((ProxyVisitor)v).visitArrayAttributeProxy(this); }
1524 @Override
1525 public String toString() {
1526 return "{" + values + "}";
1527 }
1528 }
1530 /** A temporary proxy representing a compound attribute.
1531 */
1532 static class CompoundAnnotationProxy extends Attribute {
1533 final List<Pair<Name,Attribute>> values;
1534 public CompoundAnnotationProxy(Type type,
1535 List<Pair<Name,Attribute>> values) {
1536 super(type);
1537 this.values = values;
1538 }
1539 public void accept(Visitor v) { ((ProxyVisitor)v).visitCompoundAnnotationProxy(this); }
1540 @Override
1541 public String toString() {
1542 StringBuffer buf = new StringBuffer();
1543 buf.append("@");
1544 buf.append(type.tsym.getQualifiedName());
1545 buf.append("/*proxy*/{");
1546 boolean first = true;
1547 for (List<Pair<Name,Attribute>> v = values;
1548 v.nonEmpty(); v = v.tail) {
1549 Pair<Name,Attribute> value = v.head;
1550 if (!first) buf.append(",");
1551 first = false;
1552 buf.append(value.fst);
1553 buf.append("=");
1554 buf.append(value.snd);
1555 }
1556 buf.append("}");
1557 return buf.toString();
1558 }
1559 }
1561 /** A temporary proxy representing a type annotation.
1562 */
1563 static class TypeAnnotationProxy {
1564 final CompoundAnnotationProxy compound;
1565 final TypeAnnotationPosition position;
1566 public TypeAnnotationProxy(CompoundAnnotationProxy compound,
1567 TypeAnnotationPosition position) {
1568 this.compound = compound;
1569 this.position = position;
1570 }
1571 }
1573 class AnnotationDeproxy implements ProxyVisitor {
1574 private ClassSymbol requestingOwner = currentOwner.kind == MTH
1575 ? currentOwner.enclClass() : (ClassSymbol)currentOwner;
1577 List<Attribute.Compound> deproxyCompoundList(List<CompoundAnnotationProxy> pl) {
1578 // also must fill in types!!!!
1579 ListBuffer<Attribute.Compound> buf =
1580 new ListBuffer<Attribute.Compound>();
1581 for (List<CompoundAnnotationProxy> l = pl; l.nonEmpty(); l=l.tail) {
1582 buf.append(deproxyCompound(l.head));
1583 }
1584 return buf.toList();
1585 }
1587 Attribute.Compound deproxyCompound(CompoundAnnotationProxy a) {
1588 ListBuffer<Pair<Symbol.MethodSymbol,Attribute>> buf =
1589 new ListBuffer<Pair<Symbol.MethodSymbol,Attribute>>();
1590 for (List<Pair<Name,Attribute>> l = a.values;
1591 l.nonEmpty();
1592 l = l.tail) {
1593 MethodSymbol meth = findAccessMethod(a.type, l.head.fst);
1594 buf.append(new Pair<Symbol.MethodSymbol,Attribute>
1595 (meth, deproxy(meth.type.getReturnType(), l.head.snd)));
1596 }
1597 return new Attribute.Compound(a.type, buf.toList());
1598 }
1600 MethodSymbol findAccessMethod(Type container, Name name) {
1601 CompletionFailure failure = null;
1602 try {
1603 for (Scope.Entry e = container.tsym.members().lookup(name);
1604 e.scope != null;
1605 e = e.next()) {
1606 Symbol sym = e.sym;
1607 if (sym.kind == MTH && sym.type.getParameterTypes().length() == 0)
1608 return (MethodSymbol) sym;
1609 }
1610 } catch (CompletionFailure ex) {
1611 failure = ex;
1612 }
1613 // The method wasn't found: emit a warning and recover
1614 JavaFileObject prevSource = log.useSource(requestingOwner.classfile);
1615 try {
1616 if (failure == null) {
1617 log.warning("annotation.method.not.found",
1618 container,
1619 name);
1620 } else {
1621 log.warning("annotation.method.not.found.reason",
1622 container,
1623 name,
1624 failure.getDetailValue());//diagnostic, if present
1625 }
1626 } finally {
1627 log.useSource(prevSource);
1628 }
1629 // Construct a new method type and symbol. Use bottom
1630 // type (typeof null) as return type because this type is
1631 // a subtype of all reference types and can be converted
1632 // to primitive types by unboxing.
1633 MethodType mt = new MethodType(List.<Type>nil(),
1634 syms.botType,
1635 List.<Type>nil(),
1636 syms.methodClass);
1637 return new MethodSymbol(PUBLIC | ABSTRACT, name, mt, container.tsym);
1638 }
1640 Attribute result;
1641 Type type;
1642 Attribute deproxy(Type t, Attribute a) {
1643 Type oldType = type;
1644 try {
1645 type = t;
1646 a.accept(this);
1647 return result;
1648 } finally {
1649 type = oldType;
1650 }
1651 }
1653 // implement Attribute.Visitor below
1655 public void visitConstant(Attribute.Constant value) {
1656 // assert value.type == type;
1657 result = value;
1658 }
1660 public void visitClass(Attribute.Class clazz) {
1661 result = clazz;
1662 }
1664 public void visitEnum(Attribute.Enum e) {
1665 throw new AssertionError(); // shouldn't happen
1666 }
1668 public void visitCompound(Attribute.Compound compound) {
1669 throw new AssertionError(); // shouldn't happen
1670 }
1672 public void visitArray(Attribute.Array array) {
1673 throw new AssertionError(); // shouldn't happen
1674 }
1676 public void visitError(Attribute.Error e) {
1677 throw new AssertionError(); // shouldn't happen
1678 }
1680 public void visitEnumAttributeProxy(EnumAttributeProxy proxy) {
1681 // type.tsym.flatName() should == proxy.enumFlatName
1682 TypeSymbol enumTypeSym = proxy.enumType.tsym;
1683 VarSymbol enumerator = null;
1684 for (Scope.Entry e = enumTypeSym.members().lookup(proxy.enumerator);
1685 e.scope != null;
1686 e = e.next()) {
1687 if (e.sym.kind == VAR) {
1688 enumerator = (VarSymbol)e.sym;
1689 break;
1690 }
1691 }
1692 if (enumerator == null) {
1693 log.error("unknown.enum.constant",
1694 currentClassFile, enumTypeSym, proxy.enumerator);
1695 result = new Attribute.Error(enumTypeSym.type);
1696 } else {
1697 result = new Attribute.Enum(enumTypeSym.type, enumerator);
1698 }
1699 }
1701 public void visitArrayAttributeProxy(ArrayAttributeProxy proxy) {
1702 int length = proxy.values.length();
1703 Attribute[] ats = new Attribute[length];
1704 Type elemtype = types.elemtype(type);
1705 int i = 0;
1706 for (List<Attribute> p = proxy.values; p.nonEmpty(); p = p.tail) {
1707 ats[i++] = deproxy(elemtype, p.head);
1708 }
1709 result = new Attribute.Array(type, ats);
1710 }
1712 public void visitCompoundAnnotationProxy(CompoundAnnotationProxy proxy) {
1713 result = deproxyCompound(proxy);
1714 }
1715 }
1717 class AnnotationDefaultCompleter extends AnnotationDeproxy implements Annotate.Annotator {
1718 final MethodSymbol sym;
1719 final Attribute value;
1720 final JavaFileObject classFile = currentClassFile;
1721 @Override
1722 public String toString() {
1723 return " ClassReader store default for " + sym.owner + "." + sym + " is " + value;
1724 }
1725 AnnotationDefaultCompleter(MethodSymbol sym, Attribute value) {
1726 this.sym = sym;
1727 this.value = value;
1728 }
1729 // implement Annotate.Annotator.enterAnnotation()
1730 public void enterAnnotation() {
1731 JavaFileObject previousClassFile = currentClassFile;
1732 try {
1733 currentClassFile = classFile;
1734 sym.defaultValue = deproxy(sym.type.getReturnType(), value);
1735 } finally {
1736 currentClassFile = previousClassFile;
1737 }
1738 }
1739 }
1741 class AnnotationCompleter extends AnnotationDeproxy implements Annotate.Annotator {
1742 final Symbol sym;
1743 final List<CompoundAnnotationProxy> l;
1744 final JavaFileObject classFile;
1745 @Override
1746 public String toString() {
1747 return " ClassReader annotate " + sym.owner + "." + sym + " with " + l;
1748 }
1749 AnnotationCompleter(Symbol sym, List<CompoundAnnotationProxy> l) {
1750 this.sym = sym;
1751 this.l = l;
1752 this.classFile = currentClassFile;
1753 }
1754 // implement Annotate.Annotator.enterAnnotation()
1755 public void enterAnnotation() {
1756 JavaFileObject previousClassFile = currentClassFile;
1757 try {
1758 currentClassFile = classFile;
1759 List<Attribute.Compound> newList = deproxyCompoundList(l);
1760 sym.attributes_field = ((sym.attributes_field == null)
1761 ? newList
1762 : newList.prependList(sym.attributes_field));
1763 } finally {
1764 currentClassFile = previousClassFile;
1765 }
1766 }
1767 }
1769 class TypeAnnotationCompleter extends AnnotationCompleter {
1771 List<TypeAnnotationProxy> proxies;
1773 TypeAnnotationCompleter(Symbol sym,
1774 List<TypeAnnotationProxy> proxies) {
1775 super(sym, List.<CompoundAnnotationProxy>nil());
1776 this.proxies = proxies;
1777 }
1779 List<Attribute.TypeCompound> deproxyTypeCompoundList(List<TypeAnnotationProxy> proxies) {
1780 ListBuffer<Attribute.TypeCompound> buf = ListBuffer.lb();
1781 for (TypeAnnotationProxy proxy: proxies) {
1782 Attribute.Compound compound = deproxyCompound(proxy.compound);
1783 Attribute.TypeCompound typeCompound = new Attribute.TypeCompound(compound, proxy.position);
1784 buf.add(typeCompound);
1785 }
1786 return buf.toList();
1787 }
1789 @Override
1790 public void enterAnnotation() {
1791 JavaFileObject previousClassFile = currentClassFile;
1792 try {
1793 currentClassFile = classFile;
1794 List<Attribute.TypeCompound> newList = deproxyTypeCompoundList(proxies);
1795 if (debugJSR308)
1796 System.out.println("TA: reading: adding " + newList
1797 + " to symbol " + sym + " in " + log.currentSourceFile());
1798 sym.typeAnnotations = ((sym.typeAnnotations == null)
1799 ? newList
1800 : newList.prependList(sym.typeAnnotations));
1802 } finally {
1803 currentClassFile = previousClassFile;
1804 }
1805 }
1806 }
1809 /************************************************************************
1810 * Reading Symbols
1811 ***********************************************************************/
1813 /** Read a field.
1814 */
1815 VarSymbol readField() {
1816 long flags = adjustFieldFlags(nextChar());
1817 Name name = readName(nextChar());
1818 Type type = readType(nextChar());
1819 VarSymbol v = new VarSymbol(flags, name, type, currentOwner);
1820 readMemberAttrs(v);
1821 return v;
1822 }
1824 /** Read a method.
1825 */
1826 MethodSymbol readMethod() {
1827 long flags = adjustMethodFlags(nextChar());
1828 Name name = readName(nextChar());
1829 Type type = readType(nextChar());
1830 if (name == names.init && currentOwner.hasOuterInstance()) {
1831 // Sometimes anonymous classes don't have an outer
1832 // instance, however, there is no reliable way to tell so
1833 // we never strip this$n
1834 if (!currentOwner.name.isEmpty())
1835 type = new MethodType(type.getParameterTypes().tail,
1836 type.getReturnType(),
1837 type.getThrownTypes(),
1838 syms.methodClass);
1839 }
1840 MethodSymbol m = new MethodSymbol(flags, name, type, currentOwner);
1841 Symbol prevOwner = currentOwner;
1842 currentOwner = m;
1843 try {
1844 readMemberAttrs(m);
1845 } finally {
1846 currentOwner = prevOwner;
1847 }
1848 return m;
1849 }
1851 /** Skip a field or method
1852 */
1853 void skipMember() {
1854 bp = bp + 6;
1855 char ac = nextChar();
1856 for (int i = 0; i < ac; i++) {
1857 bp = bp + 2;
1858 int attrLen = nextInt();
1859 bp = bp + attrLen;
1860 }
1861 }
1863 /** Enter type variables of this classtype and all enclosing ones in
1864 * `typevars'.
1865 */
1866 protected void enterTypevars(Type t) {
1867 if (t.getEnclosingType() != null && t.getEnclosingType().tag == CLASS)
1868 enterTypevars(t.getEnclosingType());
1869 for (List<Type> xs = t.getTypeArguments(); xs.nonEmpty(); xs = xs.tail)
1870 typevars.enter(xs.head.tsym);
1871 }
1873 protected void enterTypevars(Symbol sym) {
1874 if (sym.owner.kind == MTH) {
1875 enterTypevars(sym.owner);
1876 enterTypevars(sym.owner.owner);
1877 }
1878 enterTypevars(sym.type);
1879 }
1881 /** Read contents of a given class symbol `c'. Both external and internal
1882 * versions of an inner class are read.
1883 */
1884 void readClass(ClassSymbol c) {
1885 ClassType ct = (ClassType)c.type;
1887 // allocate scope for members
1888 c.members_field = new Scope(c);
1890 // prepare type variable table
1891 typevars = typevars.dup(currentOwner);
1892 if (ct.getEnclosingType().tag == CLASS)
1893 enterTypevars(ct.getEnclosingType());
1895 // read flags, or skip if this is an inner class
1896 long flags = adjustClassFlags(nextChar());
1897 if (c.owner.kind == PCK) c.flags_field = flags;
1899 // read own class name and check that it matches
1900 ClassSymbol self = readClassSymbol(nextChar());
1901 if (c != self)
1902 throw badClassFile("class.file.wrong.class",
1903 self.flatname);
1905 // class attributes must be read before class
1906 // skip ahead to read class attributes
1907 int startbp = bp;
1908 nextChar();
1909 char interfaceCount = nextChar();
1910 bp += interfaceCount * 2;
1911 char fieldCount = nextChar();
1912 for (int i = 0; i < fieldCount; i++) skipMember();
1913 char methodCount = nextChar();
1914 for (int i = 0; i < methodCount; i++) skipMember();
1915 readClassAttrs(c);
1917 if (readAllOfClassFile) {
1918 for (int i = 1; i < poolObj.length; i++) readPool(i);
1919 c.pool = new Pool(poolObj.length, poolObj);
1920 }
1922 // reset and read rest of classinfo
1923 bp = startbp;
1924 int n = nextChar();
1925 if (ct.supertype_field == null)
1926 ct.supertype_field = (n == 0)
1927 ? Type.noType
1928 : readClassSymbol(n).erasure(types);
1929 n = nextChar();
1930 List<Type> is = List.nil();
1931 for (int i = 0; i < n; i++) {
1932 Type _inter = readClassSymbol(nextChar()).erasure(types);
1933 is = is.prepend(_inter);
1934 }
1935 if (ct.interfaces_field == null)
1936 ct.interfaces_field = is.reverse();
1938 if (fieldCount != nextChar()) assert false;
1939 for (int i = 0; i < fieldCount; i++) enterMember(c, readField());
1940 if (methodCount != nextChar()) assert false;
1941 for (int i = 0; i < methodCount; i++) enterMember(c, readMethod());
1943 typevars = typevars.leave();
1944 }
1946 /** Read inner class info. For each inner/outer pair allocate a
1947 * member class.
1948 */
1949 void readInnerClasses(ClassSymbol c) {
1950 int n = nextChar();
1951 for (int i = 0; i < n; i++) {
1952 nextChar(); // skip inner class symbol
1953 ClassSymbol outer = readClassSymbol(nextChar());
1954 Name name = readName(nextChar());
1955 if (name == null) name = names.empty;
1956 long flags = adjustClassFlags(nextChar());
1957 if (outer != null) { // we have a member class
1958 if (name == names.empty)
1959 name = names.one;
1960 ClassSymbol member = enterClass(name, outer);
1961 if ((flags & STATIC) == 0) {
1962 ((ClassType)member.type).setEnclosingType(outer.type);
1963 if (member.erasure_field != null)
1964 ((ClassType)member.erasure_field).setEnclosingType(types.erasure(outer.type));
1965 }
1966 if (c == outer) {
1967 member.flags_field = flags;
1968 enterMember(c, member);
1969 }
1970 }
1971 }
1972 }
1974 /** Read a class file.
1975 */
1976 private void readClassFile(ClassSymbol c) throws IOException {
1977 int magic = nextInt();
1978 if (magic != JAVA_MAGIC)
1979 throw badClassFile("illegal.start.of.class.file");
1981 minorVersion = nextChar();
1982 majorVersion = nextChar();
1983 int maxMajor = Target.MAX().majorVersion;
1984 int maxMinor = Target.MAX().minorVersion;
1985 if (majorVersion > maxMajor ||
1986 majorVersion * 1000 + minorVersion <
1987 Target.MIN().majorVersion * 1000 + Target.MIN().minorVersion)
1988 {
1989 if (majorVersion == (maxMajor + 1))
1990 log.warning("big.major.version",
1991 currentClassFile,
1992 majorVersion,
1993 maxMajor);
1994 else
1995 throw badClassFile("wrong.version",
1996 Integer.toString(majorVersion),
1997 Integer.toString(minorVersion),
1998 Integer.toString(maxMajor),
1999 Integer.toString(maxMinor));
2000 }
2001 else if (checkClassFile &&
2002 majorVersion == maxMajor &&
2003 minorVersion > maxMinor)
2004 {
2005 printCCF("found.later.version",
2006 Integer.toString(minorVersion));
2007 }
2008 indexPool();
2009 if (signatureBuffer.length < bp) {
2010 int ns = Integer.highestOneBit(bp) << 1;
2011 signatureBuffer = new byte[ns];
2012 }
2013 readClass(c);
2014 }
2016 /************************************************************************
2017 * Adjusting flags
2018 ***********************************************************************/
2020 long adjustFieldFlags(long flags) {
2021 return flags;
2022 }
2023 long adjustMethodFlags(long flags) {
2024 if ((flags & ACC_BRIDGE) != 0) {
2025 flags &= ~ACC_BRIDGE;
2026 flags |= BRIDGE;
2027 if (!allowGenerics)
2028 flags &= ~SYNTHETIC;
2029 }
2030 if ((flags & ACC_VARARGS) != 0) {
2031 flags &= ~ACC_VARARGS;
2032 flags |= VARARGS;
2033 }
2034 return flags;
2035 }
2036 long adjustClassFlags(long flags) {
2037 return flags & ~ACC_SUPER; // SUPER and SYNCHRONIZED bits overloaded
2038 }
2040 /************************************************************************
2041 * Loading Classes
2042 ***********************************************************************/
2044 /** Define a new class given its name and owner.
2045 */
2046 public ClassSymbol defineClass(Name name, Symbol owner) {
2047 ClassSymbol c = new ClassSymbol(0, name, owner);
2048 if (owner.kind == PCK)
2049 assert classes.get(c.flatname) == null : c;
2050 c.completer = this;
2051 return c;
2052 }
2054 /** Create a new toplevel or member class symbol with given name
2055 * and owner and enter in `classes' unless already there.
2056 */
2057 public ClassSymbol enterClass(Name name, TypeSymbol owner) {
2058 Name flatname = TypeSymbol.formFlatName(name, owner);
2059 ClassSymbol c = classes.get(flatname);
2060 if (c == null) {
2061 c = defineClass(name, owner);
2062 classes.put(flatname, c);
2063 } else if ((c.name != name || c.owner != owner) && owner.kind == TYP && c.owner.kind == PCK) {
2064 // reassign fields of classes that might have been loaded with
2065 // their flat names.
2066 c.owner.members().remove(c);
2067 c.name = name;
2068 c.owner = owner;
2069 c.fullname = ClassSymbol.formFullName(name, owner);
2070 }
2071 return c;
2072 }
2074 /**
2075 * Creates a new toplevel class symbol with given flat name and
2076 * given class (or source) file.
2077 *
2078 * @param flatName a fully qualified binary class name
2079 * @param classFile the class file or compilation unit defining
2080 * the class (may be {@code null})
2081 * @return a newly created class symbol
2082 * @throws AssertionError if the class symbol already exists
2083 */
2084 public ClassSymbol enterClass(Name flatName, JavaFileObject classFile) {
2085 ClassSymbol cs = classes.get(flatName);
2086 if (cs != null) {
2087 String msg = Log.format("%s: completer = %s; class file = %s; source file = %s",
2088 cs.fullname,
2089 cs.completer,
2090 cs.classfile,
2091 cs.sourcefile);
2092 throw new AssertionError(msg);
2093 }
2094 Name packageName = Convert.packagePart(flatName);
2095 PackageSymbol owner = packageName.isEmpty()
2096 ? syms.unnamedPackage
2097 : enterPackage(packageName);
2098 cs = defineClass(Convert.shortName(flatName), owner);
2099 cs.classfile = classFile;
2100 classes.put(flatName, cs);
2101 return cs;
2102 }
2104 /** Create a new member or toplevel class symbol with given flat name
2105 * and enter in `classes' unless already there.
2106 */
2107 public ClassSymbol enterClass(Name flatname) {
2108 ClassSymbol c = classes.get(flatname);
2109 if (c == null)
2110 return enterClass(flatname, (JavaFileObject)null);
2111 else
2112 return c;
2113 }
2115 private boolean suppressFlush = false;
2117 /** Completion for classes to be loaded. Before a class is loaded
2118 * we make sure its enclosing class (if any) is loaded.
2119 */
2120 public void complete(Symbol sym) throws CompletionFailure {
2121 if (sym.kind == TYP) {
2122 ClassSymbol c = (ClassSymbol)sym;
2123 c.members_field = new Scope.ErrorScope(c); // make sure it's always defined
2124 boolean saveSuppressFlush = suppressFlush;
2125 suppressFlush = true;
2126 try {
2127 completeOwners(c.owner);
2128 completeEnclosing(c);
2129 } finally {
2130 suppressFlush = saveSuppressFlush;
2131 }
2132 fillIn(c);
2133 } else if (sym.kind == PCK) {
2134 PackageSymbol p = (PackageSymbol)sym;
2135 try {
2136 fillIn(p);
2137 } catch (IOException ex) {
2138 throw new CompletionFailure(sym, ex.getLocalizedMessage()).initCause(ex);
2139 }
2140 }
2141 if (!filling && !suppressFlush)
2142 annotate.flush(); // finish attaching annotations
2143 }
2145 /** complete up through the enclosing package. */
2146 private void completeOwners(Symbol o) {
2147 if (o.kind != PCK) completeOwners(o.owner);
2148 o.complete();
2149 }
2151 /**
2152 * Tries to complete lexically enclosing classes if c looks like a
2153 * nested class. This is similar to completeOwners but handles
2154 * the situation when a nested class is accessed directly as it is
2155 * possible with the Tree API or javax.lang.model.*.
2156 */
2157 private void completeEnclosing(ClassSymbol c) {
2158 if (c.owner.kind == PCK) {
2159 Symbol owner = c.owner;
2160 for (Name name : Convert.enclosingCandidates(Convert.shortName(c.name))) {
2161 Symbol encl = owner.members().lookup(name).sym;
2162 if (encl == null)
2163 encl = classes.get(TypeSymbol.formFlatName(name, owner));
2164 if (encl != null)
2165 encl.complete();
2166 }
2167 }
2168 }
2170 /** We can only read a single class file at a time; this
2171 * flag keeps track of when we are currently reading a class
2172 * file.
2173 */
2174 private boolean filling = false;
2176 /** Fill in definition of class `c' from corresponding class or
2177 * source file.
2178 */
2179 private void fillIn(ClassSymbol c) {
2180 if (completionFailureName == c.fullname) {
2181 throw new CompletionFailure(c, "user-selected completion failure by class name");
2182 }
2183 currentOwner = c;
2184 JavaFileObject classfile = c.classfile;
2185 if (classfile != null) {
2186 JavaFileObject previousClassFile = currentClassFile;
2187 try {
2188 assert !filling :
2189 "Filling " + classfile.toUri() +
2190 " during " + previousClassFile;
2191 currentClassFile = classfile;
2192 if (verbose) {
2193 printVerbose("loading", currentClassFile.toString());
2194 }
2195 if (classfile.getKind() == JavaFileObject.Kind.CLASS) {
2196 filling = true;
2197 try {
2198 bp = 0;
2199 buf = readInputStream(buf, classfile.openInputStream());
2200 readClassFile(c);
2201 if (!missingTypeVariables.isEmpty() && !foundTypeVariables.isEmpty()) {
2202 List<Type> missing = missingTypeVariables;
2203 List<Type> found = foundTypeVariables;
2204 missingTypeVariables = List.nil();
2205 foundTypeVariables = List.nil();
2206 filling = false;
2207 ClassType ct = (ClassType)currentOwner.type;
2208 ct.supertype_field =
2209 types.subst(ct.supertype_field, missing, found);
2210 ct.interfaces_field =
2211 types.subst(ct.interfaces_field, missing, found);
2212 } else if (missingTypeVariables.isEmpty() !=
2213 foundTypeVariables.isEmpty()) {
2214 Name name = missingTypeVariables.head.tsym.name;
2215 throw badClassFile("undecl.type.var", name);
2216 }
2217 } finally {
2218 missingTypeVariables = List.nil();
2219 foundTypeVariables = List.nil();
2220 filling = false;
2221 }
2222 } else {
2223 if (sourceCompleter != null) {
2224 sourceCompleter.complete(c);
2225 } else {
2226 throw new IllegalStateException("Source completer required to read "
2227 + classfile.toUri());
2228 }
2229 }
2230 return;
2231 } catch (IOException ex) {
2232 throw badClassFile("unable.to.access.file", ex.getMessage());
2233 } finally {
2234 currentClassFile = previousClassFile;
2235 }
2236 } else {
2237 JCDiagnostic diag =
2238 diagFactory.fragment("class.file.not.found", c.flatname);
2239 throw
2240 newCompletionFailure(c, diag);
2241 }
2242 }
2243 // where
2244 private static byte[] readInputStream(byte[] buf, InputStream s) throws IOException {
2245 try {
2246 buf = ensureCapacity(buf, s.available());
2247 int r = s.read(buf);
2248 int bp = 0;
2249 while (r != -1) {
2250 bp += r;
2251 buf = ensureCapacity(buf, bp);
2252 r = s.read(buf, bp, buf.length - bp);
2253 }
2254 return buf;
2255 } finally {
2256 try {
2257 s.close();
2258 } catch (IOException e) {
2259 /* Ignore any errors, as this stream may have already
2260 * thrown a related exception which is the one that
2261 * should be reported.
2262 */
2263 }
2264 }
2265 }
2266 private static byte[] ensureCapacity(byte[] buf, int needed) {
2267 if (buf.length < needed) {
2268 byte[] old = buf;
2269 buf = new byte[Integer.highestOneBit(needed) << 1];
2270 System.arraycopy(old, 0, buf, 0, old.length);
2271 }
2272 return buf;
2273 }
2274 /** Static factory for CompletionFailure objects.
2275 * In practice, only one can be used at a time, so we share one
2276 * to reduce the expense of allocating new exception objects.
2277 */
2278 private CompletionFailure newCompletionFailure(TypeSymbol c,
2279 JCDiagnostic diag) {
2280 if (!cacheCompletionFailure) {
2281 // log.warning("proc.messager",
2282 // Log.getLocalizedString("class.file.not.found", c.flatname));
2283 // c.debug.printStackTrace();
2284 return new CompletionFailure(c, diag);
2285 } else {
2286 CompletionFailure result = cachedCompletionFailure;
2287 result.sym = c;
2288 result.diag = diag;
2289 return result;
2290 }
2291 }
2292 private CompletionFailure cachedCompletionFailure =
2293 new CompletionFailure(null, (JCDiagnostic) null);
2294 {
2295 cachedCompletionFailure.setStackTrace(new StackTraceElement[0]);
2296 }
2298 /** Load a toplevel class with given fully qualified name
2299 * The class is entered into `classes' only if load was successful.
2300 */
2301 public ClassSymbol loadClass(Name flatname) throws CompletionFailure {
2302 boolean absent = classes.get(flatname) == null;
2303 ClassSymbol c = enterClass(flatname);
2304 if (c.members_field == null && c.completer != null) {
2305 try {
2306 c.complete();
2307 } catch (CompletionFailure ex) {
2308 if (absent) classes.remove(flatname);
2309 throw ex;
2310 }
2311 }
2312 return c;
2313 }
2315 /************************************************************************
2316 * Loading Packages
2317 ***********************************************************************/
2319 /** Check to see if a package exists, given its fully qualified name.
2320 */
2321 public boolean packageExists(Name fullname) {
2322 return enterPackage(fullname).exists();
2323 }
2325 /** Make a package, given its fully qualified name.
2326 */
2327 public PackageSymbol enterPackage(Name fullname) {
2328 PackageSymbol p = packages.get(fullname);
2329 if (p == null) {
2330 assert !fullname.isEmpty() : "rootPackage missing!";
2331 p = new PackageSymbol(
2332 Convert.shortName(fullname),
2333 enterPackage(Convert.packagePart(fullname)));
2334 p.completer = this;
2335 packages.put(fullname, p);
2336 }
2337 return p;
2338 }
2340 /** Make a package, given its unqualified name and enclosing package.
2341 */
2342 public PackageSymbol enterPackage(Name name, PackageSymbol owner) {
2343 return enterPackage(TypeSymbol.formFullName(name, owner));
2344 }
2346 /** Include class corresponding to given class file in package,
2347 * unless (1) we already have one the same kind (.class or .java), or
2348 * (2) we have one of the other kind, and the given class file
2349 * is older.
2350 */
2351 protected void includeClassFile(PackageSymbol p, JavaFileObject file) {
2352 if ((p.flags_field & EXISTS) == 0)
2353 for (Symbol q = p; q != null && q.kind == PCK; q = q.owner)
2354 q.flags_field |= EXISTS;
2355 JavaFileObject.Kind kind = file.getKind();
2356 int seen;
2357 if (kind == JavaFileObject.Kind.CLASS)
2358 seen = CLASS_SEEN;
2359 else
2360 seen = SOURCE_SEEN;
2361 String binaryName = fileManager.inferBinaryName(currentLoc, file);
2362 int lastDot = binaryName.lastIndexOf(".");
2363 Name classname = names.fromString(binaryName.substring(lastDot + 1));
2364 boolean isPkgInfo = classname == names.package_info;
2365 ClassSymbol c = isPkgInfo
2366 ? p.package_info
2367 : (ClassSymbol) p.members_field.lookup(classname).sym;
2368 if (c == null) {
2369 c = enterClass(classname, p);
2370 if (c.classfile == null) // only update the file if's it's newly created
2371 c.classfile = file;
2372 if (isPkgInfo) {
2373 p.package_info = c;
2374 } else {
2375 if (c.owner == p) // it might be an inner class
2376 p.members_field.enter(c);
2377 }
2378 } else if (c.classfile != null && (c.flags_field & seen) == 0) {
2379 // if c.classfile == null, we are currently compiling this class
2380 // and no further action is necessary.
2381 // if (c.flags_field & seen) != 0, we have already encountered
2382 // a file of the same kind; again no further action is necessary.
2383 if ((c.flags_field & (CLASS_SEEN | SOURCE_SEEN)) != 0)
2384 c.classfile = preferredFileObject(file, c.classfile);
2385 }
2386 c.flags_field |= seen;
2387 }
2389 /** Implement policy to choose to derive information from a source
2390 * file or a class file when both are present. May be overridden
2391 * by subclasses.
2392 */
2393 protected JavaFileObject preferredFileObject(JavaFileObject a,
2394 JavaFileObject b) {
2396 if (preferSource)
2397 return (a.getKind() == JavaFileObject.Kind.SOURCE) ? a : b;
2398 else {
2399 long adate = a.getLastModified();
2400 long bdate = b.getLastModified();
2401 // 6449326: policy for bad lastModifiedTime in ClassReader
2402 //assert adate >= 0 && bdate >= 0;
2403 return (adate > bdate) ? a : b;
2404 }
2405 }
2407 /**
2408 * specifies types of files to be read when filling in a package symbol
2409 */
2410 protected EnumSet<JavaFileObject.Kind> getPackageFileKinds() {
2411 return EnumSet.of(JavaFileObject.Kind.CLASS, JavaFileObject.Kind.SOURCE);
2412 }
2414 /**
2415 * this is used to support javadoc
2416 */
2417 protected void extraFileActions(PackageSymbol pack, JavaFileObject fe) {
2418 }
2420 protected Location currentLoc; // FIXME
2422 private boolean verbosePath = true;
2424 /** Load directory of package into members scope.
2425 */
2426 private void fillIn(PackageSymbol p) throws IOException {
2427 if (p.members_field == null) p.members_field = new Scope(p);
2428 String packageName = p.fullname.toString();
2430 Set<JavaFileObject.Kind> kinds = getPackageFileKinds();
2432 fillIn(p, PLATFORM_CLASS_PATH,
2433 fileManager.list(PLATFORM_CLASS_PATH,
2434 packageName,
2435 EnumSet.of(JavaFileObject.Kind.CLASS),
2436 false));
2438 Set<JavaFileObject.Kind> classKinds = EnumSet.copyOf(kinds);
2439 classKinds.remove(JavaFileObject.Kind.SOURCE);
2440 boolean wantClassFiles = !classKinds.isEmpty();
2442 Set<JavaFileObject.Kind> sourceKinds = EnumSet.copyOf(kinds);
2443 sourceKinds.remove(JavaFileObject.Kind.CLASS);
2444 boolean wantSourceFiles = !sourceKinds.isEmpty();
2446 boolean haveSourcePath = fileManager.hasLocation(SOURCE_PATH);
2448 if (verbose && verbosePath) {
2449 if (fileManager instanceof StandardJavaFileManager) {
2450 StandardJavaFileManager fm = (StandardJavaFileManager)fileManager;
2451 if (haveSourcePath && wantSourceFiles) {
2452 List<File> path = List.nil();
2453 for (File file : fm.getLocation(SOURCE_PATH)) {
2454 path = path.prepend(file);
2455 }
2456 printVerbose("sourcepath", path.reverse().toString());
2457 } else if (wantSourceFiles) {
2458 List<File> path = List.nil();
2459 for (File file : fm.getLocation(CLASS_PATH)) {
2460 path = path.prepend(file);
2461 }
2462 printVerbose("sourcepath", path.reverse().toString());
2463 }
2464 if (wantClassFiles) {
2465 List<File> path = List.nil();
2466 for (File file : fm.getLocation(PLATFORM_CLASS_PATH)) {
2467 path = path.prepend(file);
2468 }
2469 for (File file : fm.getLocation(CLASS_PATH)) {
2470 path = path.prepend(file);
2471 }
2472 printVerbose("classpath", path.reverse().toString());
2473 }
2474 }
2475 }
2477 if (wantSourceFiles && !haveSourcePath) {
2478 fillIn(p, CLASS_PATH,
2479 fileManager.list(CLASS_PATH,
2480 packageName,
2481 kinds,
2482 false));
2483 } else {
2484 if (wantClassFiles)
2485 fillIn(p, CLASS_PATH,
2486 fileManager.list(CLASS_PATH,
2487 packageName,
2488 classKinds,
2489 false));
2490 if (wantSourceFiles)
2491 fillIn(p, SOURCE_PATH,
2492 fileManager.list(SOURCE_PATH,
2493 packageName,
2494 sourceKinds,
2495 false));
2496 }
2497 verbosePath = false;
2498 }
2499 // where
2500 private void fillIn(PackageSymbol p,
2501 Location location,
2502 Iterable<JavaFileObject> files)
2503 {
2504 currentLoc = location;
2505 for (JavaFileObject fo : files) {
2506 switch (fo.getKind()) {
2507 case CLASS:
2508 case SOURCE: {
2509 // TODO pass binaryName to includeClassFile
2510 String binaryName = fileManager.inferBinaryName(currentLoc, fo);
2511 String simpleName = binaryName.substring(binaryName.lastIndexOf(".") + 1);
2512 if (SourceVersion.isIdentifier(simpleName) ||
2513 fo.getKind() == JavaFileObject.Kind.CLASS ||
2514 simpleName.equals("package-info"))
2515 includeClassFile(p, fo);
2516 break;
2517 }
2518 default:
2519 extraFileActions(p, fo);
2520 }
2521 }
2522 }
2524 /** Output for "-verbose" option.
2525 * @param key The key to look up the correct internationalized string.
2526 * @param arg An argument for substitution into the output string.
2527 */
2528 private void printVerbose(String key, CharSequence arg) {
2529 Log.printLines(log.noticeWriter, Log.getLocalizedString("verbose." + key, arg));
2530 }
2532 /** Output for "-checkclassfile" option.
2533 * @param key The key to look up the correct internationalized string.
2534 * @param arg An argument for substitution into the output string.
2535 */
2536 private void printCCF(String key, Object arg) {
2537 Log.printLines(log.noticeWriter, Log.getLocalizedString(key, arg));
2538 }
2541 public interface SourceCompleter {
2542 void complete(ClassSymbol sym)
2543 throws CompletionFailure;
2544 }
2546 /**
2547 * A subclass of JavaFileObject for the sourcefile attribute found in a classfile.
2548 * The attribute is only the last component of the original filename, so is unlikely
2549 * to be valid as is, so operations other than those to access the name throw
2550 * UnsupportedOperationException
2551 */
2552 private static class SourceFileObject extends BaseFileObject {
2554 /** The file's name.
2555 */
2556 private Name name;
2557 private Name flatname;
2559 public SourceFileObject(Name name, Name flatname) {
2560 super(null); // no file manager; never referenced for this file object
2561 this.name = name;
2562 this.flatname = flatname;
2563 }
2565 public InputStream openInputStream() {
2566 throw new UnsupportedOperationException();
2567 }
2569 public OutputStream openOutputStream() {
2570 throw new UnsupportedOperationException();
2571 }
2573 public Reader openReader() {
2574 throw new UnsupportedOperationException();
2575 }
2577 public Writer openWriter() {
2578 throw new UnsupportedOperationException();
2579 }
2581 /** @deprecated see bug 6410637 */
2582 @Deprecated
2583 public String getName() {
2584 return name.toString();
2585 }
2587 public long getLastModified() {
2588 throw new UnsupportedOperationException();
2589 }
2591 public boolean delete() {
2592 throw new UnsupportedOperationException();
2593 }
2595 public CharBuffer getCharContent(boolean ignoreEncodingErrors) {
2596 throw new UnsupportedOperationException();
2597 }
2599 @Override
2600 public boolean equals(Object other) {
2601 if (!(other instanceof SourceFileObject))
2602 return false;
2603 SourceFileObject o = (SourceFileObject) other;
2604 return name.equals(o.name);
2605 }
2607 @Override
2608 public int hashCode() {
2609 return name.hashCode();
2610 }
2612 public boolean isNameCompatible(String simpleName, JavaFileObject.Kind kind) {
2613 return true; // fail-safe mode
2614 }
2616 public URI toUri() {
2617 return URI.create(name.toString());
2618 }
2620 @Override
2621 public Reader openReader(boolean ignoreEncodingErrors) throws IOException {
2622 throw new UnsupportedOperationException();
2623 }
2625 @Override
2626 protected String inferBinaryName(Iterable<? extends File> path) {
2627 return flatname.toString();
2628 }
2629 }
2630 }
