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src/share/classes/com/sun/tools/javac/jvm/ClassReader.java@a76c663a9cac
src/share/classes/com/sun/tools/javac/jvm/ClassReader.java
Thu, 05 Sep 2013 11:27:27 +0200
- author
- jfranck
- date
- Thu, 05 Sep 2013 11:27:27 +0200
- changeset 2007
- a76c663a9cac
- parent 2001
- 2bf4c132bf90
- child 2040
- 2375ce96e80d
- permissions
- -rw-r--r--
8023974: Drop 'implements Completer' and 'implements SourceCompleter' from ClassReader resp. JavaCompiler.
Reviewed-by: jjg, jfranck
Contributed-by: Andreas Lundblad <andreas.lundblad@oracle.com>
1 /*
2 * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
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.jvm.ClassFile.*;
60 import static com.sun.tools.javac.jvm.ClassFile.Version.*;
62 import static com.sun.tools.javac.main.Option.*;
64 /** This class provides operations to read a classfile into an internal
65 * representation. The internal representation is anchored in a
66 * ClassSymbol which contains in its scope symbol representations
67 * for all other definitions in the classfile. Top-level Classes themselves
68 * appear as members of the scopes of PackageSymbols.
69 *
70 * <p><b>This is NOT part of any supported API.
71 * If you write code that depends on this, you do so at your own risk.
72 * This code and its internal interfaces are subject to change or
73 * deletion without notice.</b>
74 */
75 public class ClassReader {
76 /** The context key for the class reader. */
77 protected static final Context.Key<ClassReader> classReaderKey =
78 new Context.Key<ClassReader>();
80 public static final int INITIAL_BUFFER_SIZE = 0x0fff0;
82 Annotate annotate;
84 /** Switch: verbose output.
85 */
86 boolean verbose;
88 /** Switch: check class file for correct minor version, unrecognized
89 * attributes.
90 */
91 boolean checkClassFile;
93 /** Switch: read constant pool and code sections. This switch is initially
94 * set to false but can be turned on from outside.
95 */
96 public boolean readAllOfClassFile = false;
98 /** Switch: read GJ signature information.
99 */
100 boolean allowGenerics;
102 /** Switch: read varargs attribute.
103 */
104 boolean allowVarargs;
106 /** Switch: allow annotations.
107 */
108 boolean allowAnnotations;
110 /** Switch: allow simplified varargs.
111 */
112 boolean allowSimplifiedVarargs;
114 /** Lint option: warn about classfile issues
115 */
116 boolean lintClassfile;
118 /** Switch: allow default methods
119 */
120 boolean allowDefaultMethods;
122 /** Switch: preserve parameter names from the variable table.
123 */
124 public boolean saveParameterNames;
126 /**
127 * Switch: cache completion failures unless -XDdev is used
128 */
129 private boolean cacheCompletionFailure;
131 /**
132 * Switch: prefer source files instead of newer when both source
133 * and class are available
134 **/
135 public boolean preferSource;
137 /**
138 * The currently selected profile.
139 */
140 public final Profile profile;
142 /** The log to use for verbose output
143 */
144 final Log log;
146 /** The symbol table. */
147 Symtab syms;
149 Types types;
151 /** The name table. */
152 final Names names;
154 /** Force a completion failure on this name
155 */
156 final Name completionFailureName;
158 /** Access to files
159 */
160 private final JavaFileManager fileManager;
162 /** Factory for diagnostics
163 */
164 JCDiagnostic.Factory diagFactory;
166 /** Can be reassigned from outside:
167 * the completer to be used for ".java" files. If this remains unassigned
168 * ".java" files will not be loaded.
169 */
170 public SourceCompleter sourceCompleter = null;
172 /** A hashtable containing the encountered top-level and member classes,
173 * indexed by flat names. The table does not contain local classes.
174 */
175 private Map<Name,ClassSymbol> classes;
177 /** A hashtable containing the encountered packages.
178 */
179 private Map<Name, PackageSymbol> packages;
181 /** The current scope where type variables are entered.
182 */
183 protected Scope typevars;
185 /** The path name of the class file currently being read.
186 */
187 protected JavaFileObject currentClassFile = null;
189 /** The class or method currently being read.
190 */
191 protected Symbol currentOwner = null;
193 /** The buffer containing the currently read class file.
194 */
195 byte[] buf = new byte[INITIAL_BUFFER_SIZE];
197 /** The current input pointer.
198 */
199 protected int bp;
201 /** The objects of the constant pool.
202 */
203 Object[] poolObj;
205 /** For every constant pool entry, an index into buf where the
206 * defining section of the entry is found.
207 */
208 int[] poolIdx;
210 /** The major version number of the class file being read. */
211 int majorVersion;
212 /** The minor version number of the class file being read. */
213 int minorVersion;
215 /** A table to hold the constant pool indices for method parameter
216 * names, as given in LocalVariableTable attributes.
217 */
218 int[] parameterNameIndices;
220 /**
221 * Whether or not any parameter names have been found.
222 */
223 boolean haveParameterNameIndices;
225 /** Set this to false every time we start reading a method
226 * and are saving parameter names. Set it to true when we see
227 * MethodParameters, if it's set when we see a LocalVariableTable,
228 * then we ignore the parameter names from the LVT.
229 */
230 boolean sawMethodParameters;
232 /**
233 * The set of attribute names for which warnings have been generated for the current class
234 */
235 Set<Name> warnedAttrs = new HashSet<Name>();
237 /**
238 * Completer that delegates to the complete-method of this class.
239 */
240 private final Completer thisCompleter = new Completer() {
241 @Override
242 public void complete(Symbol sym) throws CompletionFailure {
243 ClassReader.this.complete(sym);
244 }
245 };
248 /** Get the ClassReader instance for this invocation. */
249 public static ClassReader instance(Context context) {
250 ClassReader instance = context.get(classReaderKey);
251 if (instance == null)
252 instance = new ClassReader(context, true);
253 return instance;
254 }
256 /** Initialize classes and packages, treating this as the definitive classreader. */
257 public void init(Symtab syms) {
258 init(syms, true);
259 }
261 /** Initialize classes and packages, optionally treating this as
262 * the definitive classreader.
263 */
264 private void init(Symtab syms, boolean definitive) {
265 if (classes != null) return;
267 if (definitive) {
268 Assert.check(packages == null || packages == syms.packages);
269 packages = syms.packages;
270 Assert.check(classes == null || classes == syms.classes);
271 classes = syms.classes;
272 } else {
273 packages = new HashMap<Name, PackageSymbol>();
274 classes = new HashMap<Name, ClassSymbol>();
275 }
277 packages.put(names.empty, syms.rootPackage);
278 syms.rootPackage.completer = thisCompleter;
279 syms.unnamedPackage.completer = thisCompleter;
280 }
282 /** Construct a new class reader, optionally treated as the
283 * definitive classreader for this invocation.
284 */
285 protected ClassReader(Context context, boolean definitive) {
286 if (definitive) context.put(classReaderKey, this);
288 names = Names.instance(context);
289 syms = Symtab.instance(context);
290 types = Types.instance(context);
291 fileManager = context.get(JavaFileManager.class);
292 if (fileManager == null)
293 throw new AssertionError("FileManager initialization error");
294 diagFactory = JCDiagnostic.Factory.instance(context);
296 init(syms, definitive);
297 log = Log.instance(context);
299 Options options = Options.instance(context);
300 annotate = Annotate.instance(context);
301 verbose = options.isSet(VERBOSE);
302 checkClassFile = options.isSet("-checkclassfile");
304 Source source = Source.instance(context);
305 allowGenerics = source.allowGenerics();
306 allowVarargs = source.allowVarargs();
307 allowAnnotations = source.allowAnnotations();
308 allowSimplifiedVarargs = source.allowSimplifiedVarargs();
309 allowDefaultMethods = source.allowDefaultMethods();
311 saveParameterNames = options.isSet("save-parameter-names");
312 cacheCompletionFailure = options.isUnset("dev");
313 preferSource = "source".equals(options.get("-Xprefer"));
315 profile = Profile.instance(context);
317 completionFailureName =
318 options.isSet("failcomplete")
319 ? names.fromString(options.get("failcomplete"))
320 : null;
322 typevars = new Scope(syms.noSymbol);
324 lintClassfile = Lint.instance(context).isEnabled(LintCategory.CLASSFILE);
326 initAttributeReaders();
327 }
329 /** Add member to class unless it is synthetic.
330 */
331 private void enterMember(ClassSymbol c, Symbol sym) {
332 // Synthetic members are not entered -- reason lost to history (optimization?).
333 // Lambda methods must be entered because they may have inner classes (which reference them)
334 if ((sym.flags_field & (SYNTHETIC|BRIDGE)) != SYNTHETIC || sym.name.startsWith(names.lambda))
335 c.members_field.enter(sym);
336 }
338 /************************************************************************
339 * Error Diagnoses
340 ***********************************************************************/
343 public class BadClassFile extends CompletionFailure {
344 private static final long serialVersionUID = 0;
346 public BadClassFile(TypeSymbol sym, JavaFileObject file, JCDiagnostic diag) {
347 super(sym, createBadClassFileDiagnostic(file, diag));
348 }
349 }
350 // where
351 private JCDiagnostic createBadClassFileDiagnostic(JavaFileObject file, JCDiagnostic diag) {
352 String key = (file.getKind() == JavaFileObject.Kind.SOURCE
353 ? "bad.source.file.header" : "bad.class.file.header");
354 return diagFactory.fragment(key, file, diag);
355 }
357 public BadClassFile badClassFile(String key, Object... args) {
358 return new BadClassFile (
359 currentOwner.enclClass(),
360 currentClassFile,
361 diagFactory.fragment(key, args));
362 }
364 /************************************************************************
365 * Buffer Access
366 ***********************************************************************/
368 /** Read a character.
369 */
370 char nextChar() {
371 return (char)(((buf[bp++] & 0xFF) << 8) + (buf[bp++] & 0xFF));
372 }
374 /** Read a byte.
375 */
376 int nextByte() {
377 return buf[bp++] & 0xFF;
378 }
380 /** Read an integer.
381 */
382 int nextInt() {
383 return
384 ((buf[bp++] & 0xFF) << 24) +
385 ((buf[bp++] & 0xFF) << 16) +
386 ((buf[bp++] & 0xFF) << 8) +
387 (buf[bp++] & 0xFF);
388 }
390 /** Extract a character at position bp from buf.
391 */
392 char getChar(int bp) {
393 return
394 (char)(((buf[bp] & 0xFF) << 8) + (buf[bp+1] & 0xFF));
395 }
397 /** Extract an integer at position bp from buf.
398 */
399 int getInt(int bp) {
400 return
401 ((buf[bp] & 0xFF) << 24) +
402 ((buf[bp+1] & 0xFF) << 16) +
403 ((buf[bp+2] & 0xFF) << 8) +
404 (buf[bp+3] & 0xFF);
405 }
408 /** Extract a long integer at position bp from buf.
409 */
410 long getLong(int bp) {
411 DataInputStream bufin =
412 new DataInputStream(new ByteArrayInputStream(buf, bp, 8));
413 try {
414 return bufin.readLong();
415 } catch (IOException e) {
416 throw new AssertionError(e);
417 }
418 }
420 /** Extract a float at position bp from buf.
421 */
422 float getFloat(int bp) {
423 DataInputStream bufin =
424 new DataInputStream(new ByteArrayInputStream(buf, bp, 4));
425 try {
426 return bufin.readFloat();
427 } catch (IOException e) {
428 throw new AssertionError(e);
429 }
430 }
432 /** Extract a double at position bp from buf.
433 */
434 double getDouble(int bp) {
435 DataInputStream bufin =
436 new DataInputStream(new ByteArrayInputStream(buf, bp, 8));
437 try {
438 return bufin.readDouble();
439 } catch (IOException e) {
440 throw new AssertionError(e);
441 }
442 }
444 /************************************************************************
445 * Constant Pool Access
446 ***********************************************************************/
448 /** Index all constant pool entries, writing their start addresses into
449 * poolIdx.
450 */
451 void indexPool() {
452 poolIdx = new int[nextChar()];
453 poolObj = new Object[poolIdx.length];
454 int i = 1;
455 while (i < poolIdx.length) {
456 poolIdx[i++] = bp;
457 byte tag = buf[bp++];
458 switch (tag) {
459 case CONSTANT_Utf8: case CONSTANT_Unicode: {
460 int len = nextChar();
461 bp = bp + len;
462 break;
463 }
464 case CONSTANT_Class:
465 case CONSTANT_String:
466 case CONSTANT_MethodType:
467 bp = bp + 2;
468 break;
469 case CONSTANT_MethodHandle:
470 bp = bp + 3;
471 break;
472 case CONSTANT_Fieldref:
473 case CONSTANT_Methodref:
474 case CONSTANT_InterfaceMethodref:
475 case CONSTANT_NameandType:
476 case CONSTANT_Integer:
477 case CONSTANT_Float:
478 case CONSTANT_InvokeDynamic:
479 bp = bp + 4;
480 break;
481 case CONSTANT_Long:
482 case CONSTANT_Double:
483 bp = bp + 8;
484 i++;
485 break;
486 default:
487 throw badClassFile("bad.const.pool.tag.at",
488 Byte.toString(tag),
489 Integer.toString(bp -1));
490 }
491 }
492 }
494 /** Read constant pool entry at start address i, use pool as a cache.
495 */
496 Object readPool(int i) {
497 Object result = poolObj[i];
498 if (result != null) return result;
500 int index = poolIdx[i];
501 if (index == 0) return null;
503 byte tag = buf[index];
504 switch (tag) {
505 case CONSTANT_Utf8:
506 poolObj[i] = names.fromUtf(buf, index + 3, getChar(index + 1));
507 break;
508 case CONSTANT_Unicode:
509 throw badClassFile("unicode.str.not.supported");
510 case CONSTANT_Class:
511 poolObj[i] = readClassOrType(getChar(index + 1));
512 break;
513 case CONSTANT_String:
514 // FIXME: (footprint) do not use toString here
515 poolObj[i] = readName(getChar(index + 1)).toString();
516 break;
517 case CONSTANT_Fieldref: {
518 ClassSymbol owner = readClassSymbol(getChar(index + 1));
519 NameAndType nt = (NameAndType)readPool(getChar(index + 3));
520 poolObj[i] = new VarSymbol(0, nt.name, nt.uniqueType.type, owner);
521 break;
522 }
523 case CONSTANT_Methodref:
524 case CONSTANT_InterfaceMethodref: {
525 ClassSymbol owner = readClassSymbol(getChar(index + 1));
526 NameAndType nt = (NameAndType)readPool(getChar(index + 3));
527 poolObj[i] = new MethodSymbol(0, nt.name, nt.uniqueType.type, owner);
528 break;
529 }
530 case CONSTANT_NameandType:
531 poolObj[i] = new NameAndType(
532 readName(getChar(index + 1)),
533 readType(getChar(index + 3)), types);
534 break;
535 case CONSTANT_Integer:
536 poolObj[i] = getInt(index + 1);
537 break;
538 case CONSTANT_Float:
539 poolObj[i] = new Float(getFloat(index + 1));
540 break;
541 case CONSTANT_Long:
542 poolObj[i] = new Long(getLong(index + 1));
543 break;
544 case CONSTANT_Double:
545 poolObj[i] = new Double(getDouble(index + 1));
546 break;
547 case CONSTANT_MethodHandle:
548 skipBytes(4);
549 break;
550 case CONSTANT_MethodType:
551 skipBytes(3);
552 break;
553 case CONSTANT_InvokeDynamic:
554 skipBytes(5);
555 break;
556 default:
557 throw badClassFile("bad.const.pool.tag", Byte.toString(tag));
558 }
559 return poolObj[i];
560 }
562 /** Read signature and convert to type.
563 */
564 Type readType(int i) {
565 int index = poolIdx[i];
566 return sigToType(buf, index + 3, getChar(index + 1));
567 }
569 /** If name is an array type or class signature, return the
570 * corresponding type; otherwise return a ClassSymbol with given name.
571 */
572 Object readClassOrType(int i) {
573 int index = poolIdx[i];
574 int len = getChar(index + 1);
575 int start = index + 3;
576 Assert.check(buf[start] == '[' || buf[start + len - 1] != ';');
577 // by the above assertion, the following test can be
578 // simplified to (buf[start] == '[')
579 return (buf[start] == '[' || buf[start + len - 1] == ';')
580 ? (Object)sigToType(buf, start, len)
581 : (Object)enterClass(names.fromUtf(internalize(buf, start,
582 len)));
583 }
585 /** Read signature and convert to type parameters.
586 */
587 List<Type> readTypeParams(int i) {
588 int index = poolIdx[i];
589 return sigToTypeParams(buf, index + 3, getChar(index + 1));
590 }
592 /** Read class entry.
593 */
594 ClassSymbol readClassSymbol(int i) {
595 return (ClassSymbol) (readPool(i));
596 }
598 /** Read name.
599 */
600 Name readName(int i) {
601 return (Name) (readPool(i));
602 }
604 /************************************************************************
605 * Reading Types
606 ***********************************************************************/
608 /** The unread portion of the currently read type is
609 * signature[sigp..siglimit-1].
610 */
611 byte[] signature;
612 int sigp;
613 int siglimit;
614 boolean sigEnterPhase = false;
616 /** Convert signature to type, where signature is a byte array segment.
617 */
618 Type sigToType(byte[] sig, int offset, int len) {
619 signature = sig;
620 sigp = offset;
621 siglimit = offset + len;
622 return sigToType();
623 }
625 /** Convert signature to type, where signature is implicit.
626 */
627 Type sigToType() {
628 switch ((char) signature[sigp]) {
629 case 'T':
630 sigp++;
631 int start = sigp;
632 while (signature[sigp] != ';') sigp++;
633 sigp++;
634 return sigEnterPhase
635 ? Type.noType
636 : findTypeVar(names.fromUtf(signature, start, sigp - 1 - start));
637 case '+': {
638 sigp++;
639 Type t = sigToType();
640 return new WildcardType(t, BoundKind.EXTENDS,
641 syms.boundClass);
642 }
643 case '*':
644 sigp++;
645 return new WildcardType(syms.objectType, BoundKind.UNBOUND,
646 syms.boundClass);
647 case '-': {
648 sigp++;
649 Type t = sigToType();
650 return new WildcardType(t, BoundKind.SUPER,
651 syms.boundClass);
652 }
653 case 'B':
654 sigp++;
655 return syms.byteType;
656 case 'C':
657 sigp++;
658 return syms.charType;
659 case 'D':
660 sigp++;
661 return syms.doubleType;
662 case 'F':
663 sigp++;
664 return syms.floatType;
665 case 'I':
666 sigp++;
667 return syms.intType;
668 case 'J':
669 sigp++;
670 return syms.longType;
671 case 'L':
672 {
673 // int oldsigp = sigp;
674 Type t = classSigToType();
675 if (sigp < siglimit && signature[sigp] == '.')
676 throw badClassFile("deprecated inner class signature syntax " +
677 "(please recompile from source)");
678 /*
679 System.err.println(" decoded " +
680 new String(signature, oldsigp, sigp-oldsigp) +
681 " => " + t + " outer " + t.outer());
682 */
683 return t;
684 }
685 case 'S':
686 sigp++;
687 return syms.shortType;
688 case 'V':
689 sigp++;
690 return syms.voidType;
691 case 'Z':
692 sigp++;
693 return syms.booleanType;
694 case '[':
695 sigp++;
696 return new ArrayType(sigToType(), syms.arrayClass);
697 case '(':
698 sigp++;
699 List<Type> argtypes = sigToTypes(')');
700 Type restype = sigToType();
701 List<Type> thrown = List.nil();
702 while (signature[sigp] == '^') {
703 sigp++;
704 thrown = thrown.prepend(sigToType());
705 }
706 return new MethodType(argtypes,
707 restype,
708 thrown.reverse(),
709 syms.methodClass);
710 case '<':
711 typevars = typevars.dup(currentOwner);
712 Type poly = new ForAll(sigToTypeParams(), sigToType());
713 typevars = typevars.leave();
714 return poly;
715 default:
716 throw badClassFile("bad.signature",
717 Convert.utf2string(signature, sigp, 10));
718 }
719 }
721 byte[] signatureBuffer = new byte[0];
722 int sbp = 0;
723 /** Convert class signature to type, where signature is implicit.
724 */
725 Type classSigToType() {
726 if (signature[sigp] != 'L')
727 throw badClassFile("bad.class.signature",
728 Convert.utf2string(signature, sigp, 10));
729 sigp++;
730 Type outer = Type.noType;
731 int startSbp = sbp;
733 while (true) {
734 final byte c = signature[sigp++];
735 switch (c) {
737 case ';': { // end
738 ClassSymbol t = enterClass(names.fromUtf(signatureBuffer,
739 startSbp,
740 sbp - startSbp));
742 try {
743 return (outer == Type.noType) ?
744 t.erasure(types) :
745 new ClassType(outer, List.<Type>nil(), t);
746 } finally {
747 sbp = startSbp;
748 }
749 }
751 case '<': // generic arguments
752 ClassSymbol t = enterClass(names.fromUtf(signatureBuffer,
753 startSbp,
754 sbp - startSbp));
755 outer = new ClassType(outer, sigToTypes('>'), t) {
756 boolean completed = false;
757 @Override
758 public Type getEnclosingType() {
759 if (!completed) {
760 completed = true;
761 tsym.complete();
762 Type enclosingType = tsym.type.getEnclosingType();
763 if (enclosingType != Type.noType) {
764 List<Type> typeArgs =
765 super.getEnclosingType().allparams();
766 List<Type> typeParams =
767 enclosingType.allparams();
768 if (typeParams.length() != typeArgs.length()) {
769 // no "rare" types
770 super.setEnclosingType(types.erasure(enclosingType));
771 } else {
772 super.setEnclosingType(types.subst(enclosingType,
773 typeParams,
774 typeArgs));
775 }
776 } else {
777 super.setEnclosingType(Type.noType);
778 }
779 }
780 return super.getEnclosingType();
781 }
782 @Override
783 public void setEnclosingType(Type outer) {
784 throw new UnsupportedOperationException();
785 }
786 };
787 switch (signature[sigp++]) {
788 case ';':
789 if (sigp < signature.length && signature[sigp] == '.') {
790 // support old-style GJC signatures
791 // The signature produced was
792 // Lfoo/Outer<Lfoo/X;>;.Lfoo/Outer$Inner<Lfoo/Y;>;
793 // rather than say
794 // Lfoo/Outer<Lfoo/X;>.Inner<Lfoo/Y;>;
795 // so we skip past ".Lfoo/Outer$"
796 sigp += (sbp - startSbp) + // "foo/Outer"
797 3; // ".L" and "$"
798 signatureBuffer[sbp++] = (byte)'$';
799 break;
800 } else {
801 sbp = startSbp;
802 return outer;
803 }
804 case '.':
805 signatureBuffer[sbp++] = (byte)'$';
806 break;
807 default:
808 throw new AssertionError(signature[sigp-1]);
809 }
810 continue;
812 case '.':
813 //we have seen an enclosing non-generic class
814 if (outer != Type.noType) {
815 t = enterClass(names.fromUtf(signatureBuffer,
816 startSbp,
817 sbp - startSbp));
818 outer = new ClassType(outer, List.<Type>nil(), t);
819 }
820 signatureBuffer[sbp++] = (byte)'$';
821 continue;
822 case '/':
823 signatureBuffer[sbp++] = (byte)'.';
824 continue;
825 default:
826 signatureBuffer[sbp++] = c;
827 continue;
828 }
829 }
830 }
832 /** Convert (implicit) signature to list of types
833 * until `terminator' is encountered.
834 */
835 List<Type> sigToTypes(char terminator) {
836 List<Type> head = List.of(null);
837 List<Type> tail = head;
838 while (signature[sigp] != terminator)
839 tail = tail.setTail(List.of(sigToType()));
840 sigp++;
841 return head.tail;
842 }
844 /** Convert signature to type parameters, where signature is a byte
845 * array segment.
846 */
847 List<Type> sigToTypeParams(byte[] sig, int offset, int len) {
848 signature = sig;
849 sigp = offset;
850 siglimit = offset + len;
851 return sigToTypeParams();
852 }
854 /** Convert signature to type parameters, where signature is implicit.
855 */
856 List<Type> sigToTypeParams() {
857 List<Type> tvars = List.nil();
858 if (signature[sigp] == '<') {
859 sigp++;
860 int start = sigp;
861 sigEnterPhase = true;
862 while (signature[sigp] != '>')
863 tvars = tvars.prepend(sigToTypeParam());
864 sigEnterPhase = false;
865 sigp = start;
866 while (signature[sigp] != '>')
867 sigToTypeParam();
868 sigp++;
869 }
870 return tvars.reverse();
871 }
873 /** Convert (implicit) signature to type parameter.
874 */
875 Type sigToTypeParam() {
876 int start = sigp;
877 while (signature[sigp] != ':') sigp++;
878 Name name = names.fromUtf(signature, start, sigp - start);
879 TypeVar tvar;
880 if (sigEnterPhase) {
881 tvar = new TypeVar(name, currentOwner, syms.botType);
882 typevars.enter(tvar.tsym);
883 } else {
884 tvar = (TypeVar)findTypeVar(name);
885 }
886 List<Type> bounds = List.nil();
887 boolean allInterfaces = false;
888 if (signature[sigp] == ':' && signature[sigp+1] == ':') {
889 sigp++;
890 allInterfaces = true;
891 }
892 while (signature[sigp] == ':') {
893 sigp++;
894 bounds = bounds.prepend(sigToType());
895 }
896 if (!sigEnterPhase) {
897 types.setBounds(tvar, bounds.reverse(), allInterfaces);
898 }
899 return tvar;
900 }
902 /** Find type variable with given name in `typevars' scope.
903 */
904 Type findTypeVar(Name name) {
905 Scope.Entry e = typevars.lookup(name);
906 if (e.scope != null) {
907 return e.sym.type;
908 } else {
909 if (readingClassAttr) {
910 // While reading the class attribute, the supertypes
911 // might refer to a type variable from an enclosing element
912 // (method or class).
913 // If the type variable is defined in the enclosing class,
914 // we can actually find it in
915 // currentOwner.owner.type.getTypeArguments()
916 // However, until we have read the enclosing method attribute
917 // we don't know for sure if this owner is correct. It could
918 // be a method and there is no way to tell before reading the
919 // enclosing method attribute.
920 TypeVar t = new TypeVar(name, currentOwner, syms.botType);
921 missingTypeVariables = missingTypeVariables.prepend(t);
922 // System.err.println("Missing type var " + name);
923 return t;
924 }
925 throw badClassFile("undecl.type.var", name);
926 }
927 }
929 /************************************************************************
930 * Reading Attributes
931 ***********************************************************************/
933 protected enum AttributeKind { CLASS, MEMBER };
934 protected abstract class AttributeReader {
935 protected AttributeReader(Name name, ClassFile.Version version, Set<AttributeKind> kinds) {
936 this.name = name;
937 this.version = version;
938 this.kinds = kinds;
939 }
941 protected boolean accepts(AttributeKind kind) {
942 if (kinds.contains(kind)) {
943 if (majorVersion > version.major || (majorVersion == version.major && minorVersion >= version.minor))
944 return true;
946 if (lintClassfile && !warnedAttrs.contains(name)) {
947 JavaFileObject prev = log.useSource(currentClassFile);
948 try {
949 log.warning(LintCategory.CLASSFILE, (DiagnosticPosition) null, "future.attr",
950 name, version.major, version.minor, majorVersion, minorVersion);
951 } finally {
952 log.useSource(prev);
953 }
954 warnedAttrs.add(name);
955 }
956 }
957 return false;
958 }
960 protected abstract void read(Symbol sym, int attrLen);
962 protected final Name name;
963 protected final ClassFile.Version version;
964 protected final Set<AttributeKind> kinds;
965 }
967 protected Set<AttributeKind> CLASS_ATTRIBUTE =
968 EnumSet.of(AttributeKind.CLASS);
969 protected Set<AttributeKind> MEMBER_ATTRIBUTE =
970 EnumSet.of(AttributeKind.MEMBER);
971 protected Set<AttributeKind> CLASS_OR_MEMBER_ATTRIBUTE =
972 EnumSet.of(AttributeKind.CLASS, AttributeKind.MEMBER);
974 protected Map<Name, AttributeReader> attributeReaders = new HashMap<Name, AttributeReader>();
976 private void initAttributeReaders() {
977 AttributeReader[] readers = {
978 // v45.3 attributes
980 new AttributeReader(names.Code, V45_3, MEMBER_ATTRIBUTE) {
981 protected void read(Symbol sym, int attrLen) {
982 if (readAllOfClassFile || saveParameterNames)
983 ((MethodSymbol)sym).code = readCode(sym);
984 else
985 bp = bp + attrLen;
986 }
987 },
989 new AttributeReader(names.ConstantValue, V45_3, MEMBER_ATTRIBUTE) {
990 protected void read(Symbol sym, int attrLen) {
991 Object v = readPool(nextChar());
992 // Ignore ConstantValue attribute if field not final.
993 if ((sym.flags() & FINAL) != 0)
994 ((VarSymbol) sym).setData(v);
995 }
996 },
998 new AttributeReader(names.Deprecated, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) {
999 protected void read(Symbol sym, int attrLen) {
1000 sym.flags_field |= DEPRECATED;
1001 }
1002 },
1004 new AttributeReader(names.Exceptions, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) {
1005 protected void read(Symbol sym, int attrLen) {
1006 int nexceptions = nextChar();
1007 List<Type> thrown = List.nil();
1008 for (int j = 0; j < nexceptions; j++)
1009 thrown = thrown.prepend(readClassSymbol(nextChar()).type);
1010 if (sym.type.getThrownTypes().isEmpty())
1011 sym.type.asMethodType().thrown = thrown.reverse();
1012 }
1013 },
1015 new AttributeReader(names.InnerClasses, V45_3, CLASS_ATTRIBUTE) {
1016 protected void read(Symbol sym, int attrLen) {
1017 ClassSymbol c = (ClassSymbol) sym;
1018 readInnerClasses(c);
1019 }
1020 },
1022 new AttributeReader(names.LocalVariableTable, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) {
1023 protected void read(Symbol sym, int attrLen) {
1024 int newbp = bp + attrLen;
1025 if (saveParameterNames && !sawMethodParameters) {
1026 // Pick up parameter names from the variable table.
1027 // Parameter names are not explicitly identified as such,
1028 // but all parameter name entries in the LocalVariableTable
1029 // have a start_pc of 0. Therefore, we record the name
1030 // indicies of all slots with a start_pc of zero in the
1031 // parameterNameIndicies array.
1032 // Note that this implicitly honors the JVMS spec that
1033 // there may be more than one LocalVariableTable, and that
1034 // there is no specified ordering for the entries.
1035 int numEntries = nextChar();
1036 for (int i = 0; i < numEntries; i++) {
1037 int start_pc = nextChar();
1038 int length = nextChar();
1039 int nameIndex = nextChar();
1040 int sigIndex = nextChar();
1041 int register = nextChar();
1042 if (start_pc == 0) {
1043 // ensure array large enough
1044 if (register >= parameterNameIndices.length) {
1045 int newSize = Math.max(register, parameterNameIndices.length + 8);
1046 parameterNameIndices =
1047 Arrays.copyOf(parameterNameIndices, newSize);
1048 }
1049 parameterNameIndices[register] = nameIndex;
1050 haveParameterNameIndices = true;
1051 }
1052 }
1053 }
1054 bp = newbp;
1055 }
1056 },
1058 new AttributeReader(names.MethodParameters, V52, MEMBER_ATTRIBUTE) {
1059 protected void read(Symbol sym, int attrlen) {
1060 int newbp = bp + attrlen;
1061 if (saveParameterNames) {
1062 sawMethodParameters = true;
1063 int numEntries = nextByte();
1064 parameterNameIndices = new int[numEntries];
1065 haveParameterNameIndices = true;
1066 for (int i = 0; i < numEntries; i++) {
1067 int nameIndex = nextChar();
1068 int flags = nextChar();
1069 parameterNameIndices[i] = nameIndex;
1070 }
1071 }
1072 bp = newbp;
1073 }
1074 },
1077 new AttributeReader(names.SourceFile, V45_3, CLASS_ATTRIBUTE) {
1078 protected void read(Symbol sym, int attrLen) {
1079 ClassSymbol c = (ClassSymbol) sym;
1080 Name n = readName(nextChar());
1081 c.sourcefile = new SourceFileObject(n, c.flatname);
1082 // If the class is a toplevel class, originating from a Java source file,
1083 // but the class name does not match the file name, then it is
1084 // an auxiliary class.
1085 String sn = n.toString();
1086 if (c.owner.kind == Kinds.PCK &&
1087 sn.endsWith(".java") &&
1088 !sn.equals(c.name.toString()+".java")) {
1089 c.flags_field |= AUXILIARY;
1090 }
1091 }
1092 },
1094 new AttributeReader(names.Synthetic, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) {
1095 protected void read(Symbol sym, int attrLen) {
1096 // bridge methods are visible when generics not enabled
1097 if (allowGenerics || (sym.flags_field & BRIDGE) == 0)
1098 sym.flags_field |= SYNTHETIC;
1099 }
1100 },
1102 // standard v49 attributes
1104 new AttributeReader(names.EnclosingMethod, V49, CLASS_ATTRIBUTE) {
1105 protected void read(Symbol sym, int attrLen) {
1106 int newbp = bp + attrLen;
1107 readEnclosingMethodAttr(sym);
1108 bp = newbp;
1109 }
1110 },
1112 new AttributeReader(names.Signature, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1113 @Override
1114 protected boolean accepts(AttributeKind kind) {
1115 return super.accepts(kind) && allowGenerics;
1116 }
1118 protected void read(Symbol sym, int attrLen) {
1119 if (sym.kind == TYP) {
1120 ClassSymbol c = (ClassSymbol) sym;
1121 readingClassAttr = true;
1122 try {
1123 ClassType ct1 = (ClassType)c.type;
1124 Assert.check(c == currentOwner);
1125 ct1.typarams_field = readTypeParams(nextChar());
1126 ct1.supertype_field = sigToType();
1127 ListBuffer<Type> is = new ListBuffer<Type>();
1128 while (sigp != siglimit) is.append(sigToType());
1129 ct1.interfaces_field = is.toList();
1130 } finally {
1131 readingClassAttr = false;
1132 }
1133 } else {
1134 List<Type> thrown = sym.type.getThrownTypes();
1135 sym.type = readType(nextChar());
1136 //- System.err.println(" # " + sym.type);
1137 if (sym.kind == MTH && sym.type.getThrownTypes().isEmpty())
1138 sym.type.asMethodType().thrown = thrown;
1140 }
1141 }
1142 },
1144 // v49 annotation attributes
1146 new AttributeReader(names.AnnotationDefault, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1147 protected void read(Symbol sym, int attrLen) {
1148 attachAnnotationDefault(sym);
1149 }
1150 },
1152 new AttributeReader(names.RuntimeInvisibleAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1153 protected void read(Symbol sym, int attrLen) {
1154 attachAnnotations(sym);
1155 }
1156 },
1158 new AttributeReader(names.RuntimeInvisibleParameterAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1159 protected void read(Symbol sym, int attrLen) {
1160 attachParameterAnnotations(sym);
1161 }
1162 },
1164 new AttributeReader(names.RuntimeVisibleAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1165 protected void read(Symbol sym, int attrLen) {
1166 attachAnnotations(sym);
1167 }
1168 },
1170 new AttributeReader(names.RuntimeVisibleParameterAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1171 protected void read(Symbol sym, int attrLen) {
1172 attachParameterAnnotations(sym);
1173 }
1174 },
1176 // additional "legacy" v49 attributes, superceded by flags
1178 new AttributeReader(names.Annotation, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1179 protected void read(Symbol sym, int attrLen) {
1180 if (allowAnnotations)
1181 sym.flags_field |= ANNOTATION;
1182 }
1183 },
1185 new AttributeReader(names.Bridge, V49, MEMBER_ATTRIBUTE) {
1186 protected void read(Symbol sym, int attrLen) {
1187 sym.flags_field |= BRIDGE;
1188 if (!allowGenerics)
1189 sym.flags_field &= ~SYNTHETIC;
1190 }
1191 },
1193 new AttributeReader(names.Enum, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1194 protected void read(Symbol sym, int attrLen) {
1195 sym.flags_field |= ENUM;
1196 }
1197 },
1199 new AttributeReader(names.Varargs, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1200 protected void read(Symbol sym, int attrLen) {
1201 if (allowVarargs)
1202 sym.flags_field |= VARARGS;
1203 }
1204 },
1206 new AttributeReader(names.RuntimeVisibleTypeAnnotations, V52, CLASS_OR_MEMBER_ATTRIBUTE) {
1207 protected void read(Symbol sym, int attrLen) {
1208 attachTypeAnnotations(sym);
1209 }
1210 },
1212 new AttributeReader(names.RuntimeInvisibleTypeAnnotations, V52, CLASS_OR_MEMBER_ATTRIBUTE) {
1213 protected void read(Symbol sym, int attrLen) {
1214 attachTypeAnnotations(sym);
1215 }
1216 },
1219 // The following attributes for a Code attribute are not currently handled
1220 // StackMapTable
1221 // SourceDebugExtension
1222 // LineNumberTable
1223 // LocalVariableTypeTable
1224 };
1226 for (AttributeReader r: readers)
1227 attributeReaders.put(r.name, r);
1228 }
1230 /** Report unrecognized attribute.
1231 */
1232 void unrecognized(Name attrName) {
1233 if (checkClassFile)
1234 printCCF("ccf.unrecognized.attribute", attrName);
1235 }
1239 protected void readEnclosingMethodAttr(Symbol sym) {
1240 // sym is a nested class with an "Enclosing Method" attribute
1241 // remove sym from it's current owners scope and place it in
1242 // the scope specified by the attribute
1243 sym.owner.members().remove(sym);
1244 ClassSymbol self = (ClassSymbol)sym;
1245 ClassSymbol c = readClassSymbol(nextChar());
1246 NameAndType nt = (NameAndType)readPool(nextChar());
1248 if (c.members_field == null)
1249 throw badClassFile("bad.enclosing.class", self, c);
1251 MethodSymbol m = findMethod(nt, c.members_field, self.flags());
1252 if (nt != null && m == null)
1253 throw badClassFile("bad.enclosing.method", self);
1255 self.name = simpleBinaryName(self.flatname, c.flatname) ;
1256 self.owner = m != null ? m : c;
1257 if (self.name.isEmpty())
1258 self.fullname = names.empty;
1259 else
1260 self.fullname = ClassSymbol.formFullName(self.name, self.owner);
1262 if (m != null) {
1263 ((ClassType)sym.type).setEnclosingType(m.type);
1264 } else if ((self.flags_field & STATIC) == 0) {
1265 ((ClassType)sym.type).setEnclosingType(c.type);
1266 } else {
1267 ((ClassType)sym.type).setEnclosingType(Type.noType);
1268 }
1269 enterTypevars(self);
1270 if (!missingTypeVariables.isEmpty()) {
1271 ListBuffer<Type> typeVars = new ListBuffer<Type>();
1272 for (Type typevar : missingTypeVariables) {
1273 typeVars.append(findTypeVar(typevar.tsym.name));
1274 }
1275 foundTypeVariables = typeVars.toList();
1276 } else {
1277 foundTypeVariables = List.nil();
1278 }
1279 }
1281 // See java.lang.Class
1282 private Name simpleBinaryName(Name self, Name enclosing) {
1283 String simpleBinaryName = self.toString().substring(enclosing.toString().length());
1284 if (simpleBinaryName.length() < 1 || simpleBinaryName.charAt(0) != '$')
1285 throw badClassFile("bad.enclosing.method", self);
1286 int index = 1;
1287 while (index < simpleBinaryName.length() &&
1288 isAsciiDigit(simpleBinaryName.charAt(index)))
1289 index++;
1290 return names.fromString(simpleBinaryName.substring(index));
1291 }
1293 private MethodSymbol findMethod(NameAndType nt, Scope scope, long flags) {
1294 if (nt == null)
1295 return null;
1297 MethodType type = nt.uniqueType.type.asMethodType();
1299 for (Scope.Entry e = scope.lookup(nt.name); e.scope != null; e = e.next())
1300 if (e.sym.kind == MTH && isSameBinaryType(e.sym.type.asMethodType(), type))
1301 return (MethodSymbol)e.sym;
1303 if (nt.name != names.init)
1304 // not a constructor
1305 return null;
1306 if ((flags & INTERFACE) != 0)
1307 // no enclosing instance
1308 return null;
1309 if (nt.uniqueType.type.getParameterTypes().isEmpty())
1310 // no parameters
1311 return null;
1313 // A constructor of an inner class.
1314 // Remove the first argument (the enclosing instance)
1315 nt.setType(new MethodType(nt.uniqueType.type.getParameterTypes().tail,
1316 nt.uniqueType.type.getReturnType(),
1317 nt.uniqueType.type.getThrownTypes(),
1318 syms.methodClass));
1319 // Try searching again
1320 return findMethod(nt, scope, flags);
1321 }
1323 /** Similar to Types.isSameType but avoids completion */
1324 private boolean isSameBinaryType(MethodType mt1, MethodType mt2) {
1325 List<Type> types1 = types.erasure(mt1.getParameterTypes())
1326 .prepend(types.erasure(mt1.getReturnType()));
1327 List<Type> types2 = mt2.getParameterTypes().prepend(mt2.getReturnType());
1328 while (!types1.isEmpty() && !types2.isEmpty()) {
1329 if (types1.head.tsym != types2.head.tsym)
1330 return false;
1331 types1 = types1.tail;
1332 types2 = types2.tail;
1333 }
1334 return types1.isEmpty() && types2.isEmpty();
1335 }
1337 /**
1338 * Character.isDigit answers <tt>true</tt> to some non-ascii
1339 * digits. This one does not. <b>copied from java.lang.Class</b>
1340 */
1341 private static boolean isAsciiDigit(char c) {
1342 return '0' <= c && c <= '9';
1343 }
1345 /** Read member attributes.
1346 */
1347 void readMemberAttrs(Symbol sym) {
1348 readAttrs(sym, AttributeKind.MEMBER);
1349 }
1351 void readAttrs(Symbol sym, AttributeKind kind) {
1352 char ac = nextChar();
1353 for (int i = 0; i < ac; i++) {
1354 Name attrName = readName(nextChar());
1355 int attrLen = nextInt();
1356 AttributeReader r = attributeReaders.get(attrName);
1357 if (r != null && r.accepts(kind))
1358 r.read(sym, attrLen);
1359 else {
1360 unrecognized(attrName);
1361 bp = bp + attrLen;
1362 }
1363 }
1364 }
1366 private boolean readingClassAttr = false;
1367 private List<Type> missingTypeVariables = List.nil();
1368 private List<Type> foundTypeVariables = List.nil();
1370 /** Read class attributes.
1371 */
1372 void readClassAttrs(ClassSymbol c) {
1373 readAttrs(c, AttributeKind.CLASS);
1374 }
1376 /** Read code block.
1377 */
1378 Code readCode(Symbol owner) {
1379 nextChar(); // max_stack
1380 nextChar(); // max_locals
1381 final int code_length = nextInt();
1382 bp += code_length;
1383 final char exception_table_length = nextChar();
1384 bp += exception_table_length * 8;
1385 readMemberAttrs(owner);
1386 return null;
1387 }
1389 /************************************************************************
1390 * Reading Java-language annotations
1391 ***********************************************************************/
1393 /** Attach annotations.
1394 */
1395 void attachAnnotations(final Symbol sym) {
1396 int numAttributes = nextChar();
1397 if (numAttributes != 0) {
1398 ListBuffer<CompoundAnnotationProxy> proxies =
1399 new ListBuffer<CompoundAnnotationProxy>();
1400 for (int i = 0; i<numAttributes; i++) {
1401 CompoundAnnotationProxy proxy = readCompoundAnnotation();
1402 if (proxy.type.tsym == syms.proprietaryType.tsym)
1403 sym.flags_field |= PROPRIETARY;
1404 else if (proxy.type.tsym == syms.profileType.tsym) {
1405 if (profile != Profile.DEFAULT) {
1406 for (Pair<Name,Attribute> v: proxy.values) {
1407 if (v.fst == names.value && v.snd instanceof Attribute.Constant) {
1408 Attribute.Constant c = (Attribute.Constant) v.snd;
1409 if (c.type == syms.intType && ((Integer) c.value) > profile.value) {
1410 sym.flags_field |= NOT_IN_PROFILE;
1411 }
1412 }
1413 }
1414 }
1415 } else
1416 proxies.append(proxy);
1417 }
1418 annotate.normal(new AnnotationCompleter(sym, proxies.toList()));
1419 }
1420 }
1422 /** Attach parameter annotations.
1423 */
1424 void attachParameterAnnotations(final Symbol method) {
1425 final MethodSymbol meth = (MethodSymbol)method;
1426 int numParameters = buf[bp++] & 0xFF;
1427 List<VarSymbol> parameters = meth.params();
1428 int pnum = 0;
1429 while (parameters.tail != null) {
1430 attachAnnotations(parameters.head);
1431 parameters = parameters.tail;
1432 pnum++;
1433 }
1434 if (pnum != numParameters) {
1435 throw badClassFile("bad.runtime.invisible.param.annotations", meth);
1436 }
1437 }
1439 void attachTypeAnnotations(final Symbol sym) {
1440 int numAttributes = nextChar();
1441 if (numAttributes != 0) {
1442 ListBuffer<TypeAnnotationProxy> proxies =
1443 ListBuffer.lb();
1444 for (int i = 0; i < numAttributes; i++)
1445 proxies.append(readTypeAnnotation());
1446 annotate.normal(new TypeAnnotationCompleter(sym, proxies.toList()));
1447 }
1448 }
1450 /** Attach the default value for an annotation element.
1451 */
1452 void attachAnnotationDefault(final Symbol sym) {
1453 final MethodSymbol meth = (MethodSymbol)sym; // only on methods
1454 final Attribute value = readAttributeValue();
1456 // The default value is set later during annotation. It might
1457 // be the case that the Symbol sym is annotated _after_ the
1458 // repeating instances that depend on this default value,
1459 // because of this we set an interim value that tells us this
1460 // element (most likely) has a default.
1461 //
1462 // Set interim value for now, reset just before we do this
1463 // properly at annotate time.
1464 meth.defaultValue = value;
1465 annotate.normal(new AnnotationDefaultCompleter(meth, value));
1466 }
1468 Type readTypeOrClassSymbol(int i) {
1469 // support preliminary jsr175-format class files
1470 if (buf[poolIdx[i]] == CONSTANT_Class)
1471 return readClassSymbol(i).type;
1472 return readType(i);
1473 }
1474 Type readEnumType(int i) {
1475 // support preliminary jsr175-format class files
1476 int index = poolIdx[i];
1477 int length = getChar(index + 1);
1478 if (buf[index + length + 2] != ';')
1479 return enterClass(readName(i)).type;
1480 return readType(i);
1481 }
1483 CompoundAnnotationProxy readCompoundAnnotation() {
1484 Type t = readTypeOrClassSymbol(nextChar());
1485 int numFields = nextChar();
1486 ListBuffer<Pair<Name,Attribute>> pairs =
1487 new ListBuffer<Pair<Name,Attribute>>();
1488 for (int i=0; i<numFields; i++) {
1489 Name name = readName(nextChar());
1490 Attribute value = readAttributeValue();
1491 pairs.append(new Pair<Name,Attribute>(name, value));
1492 }
1493 return new CompoundAnnotationProxy(t, pairs.toList());
1494 }
1496 TypeAnnotationProxy readTypeAnnotation() {
1497 TypeAnnotationPosition position = readPosition();
1498 CompoundAnnotationProxy proxy = readCompoundAnnotation();
1500 return new TypeAnnotationProxy(proxy, position);
1501 }
1503 TypeAnnotationPosition readPosition() {
1504 int tag = nextByte(); // TargetType tag is a byte
1506 if (!TargetType.isValidTargetTypeValue(tag))
1507 throw this.badClassFile("bad.type.annotation.value", String.format("0x%02X", tag));
1509 TypeAnnotationPosition position = new TypeAnnotationPosition();
1510 TargetType type = TargetType.fromTargetTypeValue(tag);
1512 position.type = type;
1514 switch (type) {
1515 // instanceof
1516 case INSTANCEOF:
1517 // new expression
1518 case NEW:
1519 // constructor/method reference receiver
1520 case CONSTRUCTOR_REFERENCE:
1521 case METHOD_REFERENCE:
1522 position.offset = nextChar();
1523 break;
1524 // local variable
1525 case LOCAL_VARIABLE:
1526 // resource variable
1527 case RESOURCE_VARIABLE:
1528 int table_length = nextChar();
1529 position.lvarOffset = new int[table_length];
1530 position.lvarLength = new int[table_length];
1531 position.lvarIndex = new int[table_length];
1533 for (int i = 0; i < table_length; ++i) {
1534 position.lvarOffset[i] = nextChar();
1535 position.lvarLength[i] = nextChar();
1536 position.lvarIndex[i] = nextChar();
1537 }
1538 break;
1539 // exception parameter
1540 case EXCEPTION_PARAMETER:
1541 position.exception_index = nextChar();
1542 break;
1543 // method receiver
1544 case METHOD_RECEIVER:
1545 // Do nothing
1546 break;
1547 // type parameter
1548 case CLASS_TYPE_PARAMETER:
1549 case METHOD_TYPE_PARAMETER:
1550 position.parameter_index = nextByte();
1551 break;
1552 // type parameter bound
1553 case CLASS_TYPE_PARAMETER_BOUND:
1554 case METHOD_TYPE_PARAMETER_BOUND:
1555 position.parameter_index = nextByte();
1556 position.bound_index = nextByte();
1557 break;
1558 // class extends or implements clause
1559 case CLASS_EXTENDS:
1560 position.type_index = nextChar();
1561 break;
1562 // throws
1563 case THROWS:
1564 position.type_index = nextChar();
1565 break;
1566 // method parameter
1567 case METHOD_FORMAL_PARAMETER:
1568 position.parameter_index = nextByte();
1569 break;
1570 // type cast
1571 case CAST:
1572 // method/constructor/reference type argument
1573 case CONSTRUCTOR_INVOCATION_TYPE_ARGUMENT:
1574 case METHOD_INVOCATION_TYPE_ARGUMENT:
1575 case CONSTRUCTOR_REFERENCE_TYPE_ARGUMENT:
1576 case METHOD_REFERENCE_TYPE_ARGUMENT:
1577 position.offset = nextChar();
1578 position.type_index = nextByte();
1579 break;
1580 // We don't need to worry about these
1581 case METHOD_RETURN:
1582 case FIELD:
1583 break;
1584 case UNKNOWN:
1585 throw new AssertionError("jvm.ClassReader: UNKNOWN target type should never occur!");
1586 default:
1587 throw new AssertionError("jvm.ClassReader: Unknown target type for position: " + position);
1588 }
1590 { // See whether there is location info and read it
1591 int len = nextByte();
1592 ListBuffer<Integer> loc = ListBuffer.lb();
1593 for (int i = 0; i < len * TypeAnnotationPosition.TypePathEntry.bytesPerEntry; ++i)
1594 loc = loc.append(nextByte());
1595 position.location = TypeAnnotationPosition.getTypePathFromBinary(loc.toList());
1596 }
1598 return position;
1599 }
1601 Attribute readAttributeValue() {
1602 char c = (char) buf[bp++];
1603 switch (c) {
1604 case 'B':
1605 return new Attribute.Constant(syms.byteType, readPool(nextChar()));
1606 case 'C':
1607 return new Attribute.Constant(syms.charType, readPool(nextChar()));
1608 case 'D':
1609 return new Attribute.Constant(syms.doubleType, readPool(nextChar()));
1610 case 'F':
1611 return new Attribute.Constant(syms.floatType, readPool(nextChar()));
1612 case 'I':
1613 return new Attribute.Constant(syms.intType, readPool(nextChar()));
1614 case 'J':
1615 return new Attribute.Constant(syms.longType, readPool(nextChar()));
1616 case 'S':
1617 return new Attribute.Constant(syms.shortType, readPool(nextChar()));
1618 case 'Z':
1619 return new Attribute.Constant(syms.booleanType, readPool(nextChar()));
1620 case 's':
1621 return new Attribute.Constant(syms.stringType, readPool(nextChar()).toString());
1622 case 'e':
1623 return new EnumAttributeProxy(readEnumType(nextChar()), readName(nextChar()));
1624 case 'c':
1625 return new Attribute.Class(types, readTypeOrClassSymbol(nextChar()));
1626 case '[': {
1627 int n = nextChar();
1628 ListBuffer<Attribute> l = new ListBuffer<Attribute>();
1629 for (int i=0; i<n; i++)
1630 l.append(readAttributeValue());
1631 return new ArrayAttributeProxy(l.toList());
1632 }
1633 case '@':
1634 return readCompoundAnnotation();
1635 default:
1636 throw new AssertionError("unknown annotation tag '" + c + "'");
1637 }
1638 }
1640 interface ProxyVisitor extends Attribute.Visitor {
1641 void visitEnumAttributeProxy(EnumAttributeProxy proxy);
1642 void visitArrayAttributeProxy(ArrayAttributeProxy proxy);
1643 void visitCompoundAnnotationProxy(CompoundAnnotationProxy proxy);
1644 }
1646 static class EnumAttributeProxy extends Attribute {
1647 Type enumType;
1648 Name enumerator;
1649 public EnumAttributeProxy(Type enumType, Name enumerator) {
1650 super(null);
1651 this.enumType = enumType;
1652 this.enumerator = enumerator;
1653 }
1654 public void accept(Visitor v) { ((ProxyVisitor)v).visitEnumAttributeProxy(this); }
1655 @Override
1656 public String toString() {
1657 return "/*proxy enum*/" + enumType + "." + enumerator;
1658 }
1659 }
1661 static class ArrayAttributeProxy extends Attribute {
1662 List<Attribute> values;
1663 ArrayAttributeProxy(List<Attribute> values) {
1664 super(null);
1665 this.values = values;
1666 }
1667 public void accept(Visitor v) { ((ProxyVisitor)v).visitArrayAttributeProxy(this); }
1668 @Override
1669 public String toString() {
1670 return "{" + values + "}";
1671 }
1672 }
1674 /** A temporary proxy representing a compound attribute.
1675 */
1676 static class CompoundAnnotationProxy extends Attribute {
1677 final List<Pair<Name,Attribute>> values;
1678 public CompoundAnnotationProxy(Type type,
1679 List<Pair<Name,Attribute>> values) {
1680 super(type);
1681 this.values = values;
1682 }
1683 public void accept(Visitor v) { ((ProxyVisitor)v).visitCompoundAnnotationProxy(this); }
1684 @Override
1685 public String toString() {
1686 StringBuilder buf = new StringBuilder();
1687 buf.append("@");
1688 buf.append(type.tsym.getQualifiedName());
1689 buf.append("/*proxy*/{");
1690 boolean first = true;
1691 for (List<Pair<Name,Attribute>> v = values;
1692 v.nonEmpty(); v = v.tail) {
1693 Pair<Name,Attribute> value = v.head;
1694 if (!first) buf.append(",");
1695 first = false;
1696 buf.append(value.fst);
1697 buf.append("=");
1698 buf.append(value.snd);
1699 }
1700 buf.append("}");
1701 return buf.toString();
1702 }
1703 }
1705 /** A temporary proxy representing a type annotation.
1706 */
1707 static class TypeAnnotationProxy {
1708 final CompoundAnnotationProxy compound;
1709 final TypeAnnotationPosition position;
1710 public TypeAnnotationProxy(CompoundAnnotationProxy compound,
1711 TypeAnnotationPosition position) {
1712 this.compound = compound;
1713 this.position = position;
1714 }
1715 }
1717 class AnnotationDeproxy implements ProxyVisitor {
1718 private ClassSymbol requestingOwner = currentOwner.kind == MTH
1719 ? currentOwner.enclClass() : (ClassSymbol)currentOwner;
1721 List<Attribute.Compound> deproxyCompoundList(List<CompoundAnnotationProxy> pl) {
1722 // also must fill in types!!!!
1723 ListBuffer<Attribute.Compound> buf =
1724 new ListBuffer<Attribute.Compound>();
1725 for (List<CompoundAnnotationProxy> l = pl; l.nonEmpty(); l=l.tail) {
1726 buf.append(deproxyCompound(l.head));
1727 }
1728 return buf.toList();
1729 }
1731 Attribute.Compound deproxyCompound(CompoundAnnotationProxy a) {
1732 ListBuffer<Pair<Symbol.MethodSymbol,Attribute>> buf =
1733 new ListBuffer<Pair<Symbol.MethodSymbol,Attribute>>();
1734 for (List<Pair<Name,Attribute>> l = a.values;
1735 l.nonEmpty();
1736 l = l.tail) {
1737 MethodSymbol meth = findAccessMethod(a.type, l.head.fst);
1738 buf.append(new Pair<Symbol.MethodSymbol,Attribute>
1739 (meth, deproxy(meth.type.getReturnType(), l.head.snd)));
1740 }
1741 return new Attribute.Compound(a.type, buf.toList());
1742 }
1744 MethodSymbol findAccessMethod(Type container, Name name) {
1745 CompletionFailure failure = null;
1746 try {
1747 for (Scope.Entry e = container.tsym.members().lookup(name);
1748 e.scope != null;
1749 e = e.next()) {
1750 Symbol sym = e.sym;
1751 if (sym.kind == MTH && sym.type.getParameterTypes().length() == 0)
1752 return (MethodSymbol) sym;
1753 }
1754 } catch (CompletionFailure ex) {
1755 failure = ex;
1756 }
1757 // The method wasn't found: emit a warning and recover
1758 JavaFileObject prevSource = log.useSource(requestingOwner.classfile);
1759 try {
1760 if (failure == null) {
1761 log.warning("annotation.method.not.found",
1762 container,
1763 name);
1764 } else {
1765 log.warning("annotation.method.not.found.reason",
1766 container,
1767 name,
1768 failure.getDetailValue());//diagnostic, if present
1769 }
1770 } finally {
1771 log.useSource(prevSource);
1772 }
1773 // Construct a new method type and symbol. Use bottom
1774 // type (typeof null) as return type because this type is
1775 // a subtype of all reference types and can be converted
1776 // to primitive types by unboxing.
1777 MethodType mt = new MethodType(List.<Type>nil(),
1778 syms.botType,
1779 List.<Type>nil(),
1780 syms.methodClass);
1781 return new MethodSymbol(PUBLIC | ABSTRACT, name, mt, container.tsym);
1782 }
1784 Attribute result;
1785 Type type;
1786 Attribute deproxy(Type t, Attribute a) {
1787 Type oldType = type;
1788 try {
1789 type = t;
1790 a.accept(this);
1791 return result;
1792 } finally {
1793 type = oldType;
1794 }
1795 }
1797 // implement Attribute.Visitor below
1799 public void visitConstant(Attribute.Constant value) {
1800 // assert value.type == type;
1801 result = value;
1802 }
1804 public void visitClass(Attribute.Class clazz) {
1805 result = clazz;
1806 }
1808 public void visitEnum(Attribute.Enum e) {
1809 throw new AssertionError(); // shouldn't happen
1810 }
1812 public void visitCompound(Attribute.Compound compound) {
1813 throw new AssertionError(); // shouldn't happen
1814 }
1816 public void visitArray(Attribute.Array array) {
1817 throw new AssertionError(); // shouldn't happen
1818 }
1820 public void visitError(Attribute.Error e) {
1821 throw new AssertionError(); // shouldn't happen
1822 }
1824 public void visitEnumAttributeProxy(EnumAttributeProxy proxy) {
1825 // type.tsym.flatName() should == proxy.enumFlatName
1826 TypeSymbol enumTypeSym = proxy.enumType.tsym;
1827 VarSymbol enumerator = null;
1828 CompletionFailure failure = null;
1829 try {
1830 for (Scope.Entry e = enumTypeSym.members().lookup(proxy.enumerator);
1831 e.scope != null;
1832 e = e.next()) {
1833 if (e.sym.kind == VAR) {
1834 enumerator = (VarSymbol)e.sym;
1835 break;
1836 }
1837 }
1838 }
1839 catch (CompletionFailure ex) {
1840 failure = ex;
1841 }
1842 if (enumerator == null) {
1843 if (failure != null) {
1844 log.warning("unknown.enum.constant.reason",
1845 currentClassFile, enumTypeSym, proxy.enumerator,
1846 failure.getDiagnostic());
1847 } else {
1848 log.warning("unknown.enum.constant",
1849 currentClassFile, enumTypeSym, proxy.enumerator);
1850 }
1851 result = new Attribute.Enum(enumTypeSym.type,
1852 new VarSymbol(0, proxy.enumerator, syms.botType, enumTypeSym));
1853 } else {
1854 result = new Attribute.Enum(enumTypeSym.type, enumerator);
1855 }
1856 }
1858 public void visitArrayAttributeProxy(ArrayAttributeProxy proxy) {
1859 int length = proxy.values.length();
1860 Attribute[] ats = new Attribute[length];
1861 Type elemtype = types.elemtype(type);
1862 int i = 0;
1863 for (List<Attribute> p = proxy.values; p.nonEmpty(); p = p.tail) {
1864 ats[i++] = deproxy(elemtype, p.head);
1865 }
1866 result = new Attribute.Array(type, ats);
1867 }
1869 public void visitCompoundAnnotationProxy(CompoundAnnotationProxy proxy) {
1870 result = deproxyCompound(proxy);
1871 }
1872 }
1874 class AnnotationDefaultCompleter extends AnnotationDeproxy implements Annotate.Annotator {
1875 final MethodSymbol sym;
1876 final Attribute value;
1877 final JavaFileObject classFile = currentClassFile;
1878 @Override
1879 public String toString() {
1880 return " ClassReader store default for " + sym.owner + "." + sym + " is " + value;
1881 }
1882 AnnotationDefaultCompleter(MethodSymbol sym, Attribute value) {
1883 this.sym = sym;
1884 this.value = value;
1885 }
1886 // implement Annotate.Annotator.enterAnnotation()
1887 public void enterAnnotation() {
1888 JavaFileObject previousClassFile = currentClassFile;
1889 try {
1890 // Reset the interim value set earlier in
1891 // attachAnnotationDefault().
1892 sym.defaultValue = null;
1893 currentClassFile = classFile;
1894 sym.defaultValue = deproxy(sym.type.getReturnType(), value);
1895 } finally {
1896 currentClassFile = previousClassFile;
1897 }
1898 }
1899 }
1901 class AnnotationCompleter extends AnnotationDeproxy implements Annotate.Annotator {
1902 final Symbol sym;
1903 final List<CompoundAnnotationProxy> l;
1904 final JavaFileObject classFile;
1905 @Override
1906 public String toString() {
1907 return " ClassReader annotate " + sym.owner + "." + sym + " with " + l;
1908 }
1909 AnnotationCompleter(Symbol sym, List<CompoundAnnotationProxy> l) {
1910 this.sym = sym;
1911 this.l = l;
1912 this.classFile = currentClassFile;
1913 }
1914 // implement Annotate.Annotator.enterAnnotation()
1915 public void enterAnnotation() {
1916 JavaFileObject previousClassFile = currentClassFile;
1917 try {
1918 currentClassFile = classFile;
1919 List<Attribute.Compound> newList = deproxyCompoundList(l);
1920 if (sym.annotationsPendingCompletion()) {
1921 sym.setDeclarationAttributes(newList);
1922 } else {
1923 sym.appendAttributes(newList);
1924 }
1925 } finally {
1926 currentClassFile = previousClassFile;
1927 }
1928 }
1929 }
1931 class TypeAnnotationCompleter extends AnnotationCompleter {
1933 List<TypeAnnotationProxy> proxies;
1935 TypeAnnotationCompleter(Symbol sym,
1936 List<TypeAnnotationProxy> proxies) {
1937 super(sym, List.<CompoundAnnotationProxy>nil());
1938 this.proxies = proxies;
1939 }
1941 List<Attribute.TypeCompound> deproxyTypeCompoundList(List<TypeAnnotationProxy> proxies) {
1942 ListBuffer<Attribute.TypeCompound> buf = ListBuffer.lb();
1943 for (TypeAnnotationProxy proxy: proxies) {
1944 Attribute.Compound compound = deproxyCompound(proxy.compound);
1945 Attribute.TypeCompound typeCompound = new Attribute.TypeCompound(compound, proxy.position);
1946 buf.add(typeCompound);
1947 }
1948 return buf.toList();
1949 }
1951 @Override
1952 public void enterAnnotation() {
1953 JavaFileObject previousClassFile = currentClassFile;
1954 try {
1955 currentClassFile = classFile;
1956 List<Attribute.TypeCompound> newList = deproxyTypeCompoundList(proxies);
1957 sym.setTypeAttributes(newList.prependList(sym.getRawTypeAttributes()));
1958 } finally {
1959 currentClassFile = previousClassFile;
1960 }
1961 }
1962 }
1965 /************************************************************************
1966 * Reading Symbols
1967 ***********************************************************************/
1969 /** Read a field.
1970 */
1971 VarSymbol readField() {
1972 long flags = adjustFieldFlags(nextChar());
1973 Name name = readName(nextChar());
1974 Type type = readType(nextChar());
1975 VarSymbol v = new VarSymbol(flags, name, type, currentOwner);
1976 readMemberAttrs(v);
1977 return v;
1978 }
1980 /** Read a method.
1981 */
1982 MethodSymbol readMethod() {
1983 long flags = adjustMethodFlags(nextChar());
1984 Name name = readName(nextChar());
1985 Type type = readType(nextChar());
1986 if (currentOwner.isInterface() &&
1987 (flags & ABSTRACT) == 0 && !name.equals(names.clinit)) {
1988 if (majorVersion > Target.JDK1_8.majorVersion ||
1989 (majorVersion == Target.JDK1_8.majorVersion && minorVersion >= Target.JDK1_8.minorVersion)) {
1990 currentOwner.flags_field |= DEFAULT;
1991 flags |= DEFAULT | ABSTRACT;
1992 } else {
1993 //protect against ill-formed classfiles
1994 throw new CompletionFailure(currentOwner, "default method found in pre JDK 8 classfile");
1995 }
1996 }
1997 if (name == names.init && currentOwner.hasOuterInstance()) {
1998 // Sometimes anonymous classes don't have an outer
1999 // instance, however, there is no reliable way to tell so
2000 // we never strip this$n
2001 if (!currentOwner.name.isEmpty())
2002 type = new MethodType(adjustMethodParams(flags, type.getParameterTypes()),
2003 type.getReturnType(),
2004 type.getThrownTypes(),
2005 syms.methodClass);
2006 }
2007 MethodSymbol m = new MethodSymbol(flags, name, type, currentOwner);
2008 if (types.isSignaturePolymorphic(m)) {
2009 m.flags_field |= SIGNATURE_POLYMORPHIC;
2010 }
2011 if (saveParameterNames)
2012 initParameterNames(m);
2013 Symbol prevOwner = currentOwner;
2014 currentOwner = m;
2015 try {
2016 readMemberAttrs(m);
2017 } finally {
2018 currentOwner = prevOwner;
2019 }
2020 if (saveParameterNames)
2021 setParameterNames(m, type);
2022 return m;
2023 }
2025 private List<Type> adjustMethodParams(long flags, List<Type> args) {
2026 boolean isVarargs = (flags & VARARGS) != 0;
2027 if (isVarargs) {
2028 Type varargsElem = args.last();
2029 ListBuffer<Type> adjustedArgs = ListBuffer.lb();
2030 for (Type t : args) {
2031 adjustedArgs.append(t != varargsElem ?
2032 t :
2033 ((ArrayType)t).makeVarargs());
2034 }
2035 args = adjustedArgs.toList();
2036 }
2037 return args.tail;
2038 }
2040 /**
2041 * Init the parameter names array.
2042 * Parameter names are currently inferred from the names in the
2043 * LocalVariableTable attributes of a Code attribute.
2044 * (Note: this means parameter names are currently not available for
2045 * methods without a Code attribute.)
2046 * This method initializes an array in which to store the name indexes
2047 * of parameter names found in LocalVariableTable attributes. It is
2048 * slightly supersized to allow for additional slots with a start_pc of 0.
2049 */
2050 void initParameterNames(MethodSymbol sym) {
2051 // make allowance for synthetic parameters.
2052 final int excessSlots = 4;
2053 int expectedParameterSlots =
2054 Code.width(sym.type.getParameterTypes()) + excessSlots;
2055 if (parameterNameIndices == null
2056 || parameterNameIndices.length < expectedParameterSlots) {
2057 parameterNameIndices = new int[expectedParameterSlots];
2058 } else
2059 Arrays.fill(parameterNameIndices, 0);
2060 haveParameterNameIndices = false;
2061 sawMethodParameters = false;
2062 }
2064 /**
2065 * Set the parameter names for a symbol from the name index in the
2066 * parameterNameIndicies array. The type of the symbol may have changed
2067 * while reading the method attributes (see the Signature attribute).
2068 * This may be because of generic information or because anonymous
2069 * synthetic parameters were added. The original type (as read from
2070 * the method descriptor) is used to help guess the existence of
2071 * anonymous synthetic parameters.
2072 * On completion, sym.savedParameter names will either be null (if
2073 * no parameter names were found in the class file) or will be set to a
2074 * list of names, one per entry in sym.type.getParameterTypes, with
2075 * any missing names represented by the empty name.
2076 */
2077 void setParameterNames(MethodSymbol sym, Type jvmType) {
2078 // if no names were found in the class file, there's nothing more to do
2079 if (!haveParameterNameIndices)
2080 return;
2081 // If we get parameter names from MethodParameters, then we
2082 // don't need to skip.
2083 int firstParam = 0;
2084 if (!sawMethodParameters) {
2085 firstParam = ((sym.flags() & STATIC) == 0) ? 1 : 0;
2086 // the code in readMethod may have skipped the first
2087 // parameter when setting up the MethodType. If so, we
2088 // make a corresponding allowance here for the position of
2089 // the first parameter. Note that this assumes the
2090 // skipped parameter has a width of 1 -- i.e. it is not
2091 // a double width type (long or double.)
2092 if (sym.name == names.init && currentOwner.hasOuterInstance()) {
2093 // Sometimes anonymous classes don't have an outer
2094 // instance, however, there is no reliable way to tell so
2095 // we never strip this$n
2096 if (!currentOwner.name.isEmpty())
2097 firstParam += 1;
2098 }
2100 if (sym.type != jvmType) {
2101 // reading the method attributes has caused the
2102 // symbol's type to be changed. (i.e. the Signature
2103 // attribute.) This may happen if there are hidden
2104 // (synthetic) parameters in the descriptor, but not
2105 // in the Signature. The position of these hidden
2106 // parameters is unspecified; for now, assume they are
2107 // at the beginning, and so skip over them. The
2108 // primary case for this is two hidden parameters
2109 // passed into Enum constructors.
2110 int skip = Code.width(jvmType.getParameterTypes())
2111 - Code.width(sym.type.getParameterTypes());
2112 firstParam += skip;
2113 }
2114 }
2115 List<Name> paramNames = List.nil();
2116 int index = firstParam;
2117 for (Type t: sym.type.getParameterTypes()) {
2118 int nameIdx = (index < parameterNameIndices.length
2119 ? parameterNameIndices[index] : 0);
2120 Name name = nameIdx == 0 ? names.empty : readName(nameIdx);
2121 paramNames = paramNames.prepend(name);
2122 index += Code.width(t);
2123 }
2124 sym.savedParameterNames = paramNames.reverse();
2125 }
2127 /**
2128 * skip n bytes
2129 */
2130 void skipBytes(int n) {
2131 bp = bp + n;
2132 }
2134 /** Skip a field or method
2135 */
2136 void skipMember() {
2137 bp = bp + 6;
2138 char ac = nextChar();
2139 for (int i = 0; i < ac; i++) {
2140 bp = bp + 2;
2141 int attrLen = nextInt();
2142 bp = bp + attrLen;
2143 }
2144 }
2146 /** Enter type variables of this classtype and all enclosing ones in
2147 * `typevars'.
2148 */
2149 protected void enterTypevars(Type t) {
2150 if (t.getEnclosingType() != null && t.getEnclosingType().hasTag(CLASS))
2151 enterTypevars(t.getEnclosingType());
2152 for (List<Type> xs = t.getTypeArguments(); xs.nonEmpty(); xs = xs.tail)
2153 typevars.enter(xs.head.tsym);
2154 }
2156 protected void enterTypevars(Symbol sym) {
2157 if (sym.owner.kind == MTH) {
2158 enterTypevars(sym.owner);
2159 enterTypevars(sym.owner.owner);
2160 }
2161 enterTypevars(sym.type);
2162 }
2164 /** Read contents of a given class symbol `c'. Both external and internal
2165 * versions of an inner class are read.
2166 */
2167 void readClass(ClassSymbol c) {
2168 ClassType ct = (ClassType)c.type;
2170 // allocate scope for members
2171 c.members_field = new Scope(c);
2173 // prepare type variable table
2174 typevars = typevars.dup(currentOwner);
2175 if (ct.getEnclosingType().hasTag(CLASS))
2176 enterTypevars(ct.getEnclosingType());
2178 // read flags, or skip if this is an inner class
2179 long flags = adjustClassFlags(nextChar());
2180 if (c.owner.kind == PCK) c.flags_field = flags;
2182 // read own class name and check that it matches
2183 ClassSymbol self = readClassSymbol(nextChar());
2184 if (c != self)
2185 throw badClassFile("class.file.wrong.class",
2186 self.flatname);
2188 // class attributes must be read before class
2189 // skip ahead to read class attributes
2190 int startbp = bp;
2191 nextChar();
2192 char interfaceCount = nextChar();
2193 bp += interfaceCount * 2;
2194 char fieldCount = nextChar();
2195 for (int i = 0; i < fieldCount; i++) skipMember();
2196 char methodCount = nextChar();
2197 for (int i = 0; i < methodCount; i++) skipMember();
2198 readClassAttrs(c);
2200 if (readAllOfClassFile) {
2201 for (int i = 1; i < poolObj.length; i++) readPool(i);
2202 c.pool = new Pool(poolObj.length, poolObj, types);
2203 }
2205 // reset and read rest of classinfo
2206 bp = startbp;
2207 int n = nextChar();
2208 if (ct.supertype_field == null)
2209 ct.supertype_field = (n == 0)
2210 ? Type.noType
2211 : readClassSymbol(n).erasure(types);
2212 n = nextChar();
2213 List<Type> is = List.nil();
2214 for (int i = 0; i < n; i++) {
2215 Type _inter = readClassSymbol(nextChar()).erasure(types);
2216 is = is.prepend(_inter);
2217 }
2218 if (ct.interfaces_field == null)
2219 ct.interfaces_field = is.reverse();
2221 Assert.check(fieldCount == nextChar());
2222 for (int i = 0; i < fieldCount; i++) enterMember(c, readField());
2223 Assert.check(methodCount == nextChar());
2224 for (int i = 0; i < methodCount; i++) enterMember(c, readMethod());
2226 typevars = typevars.leave();
2227 }
2229 /** Read inner class info. For each inner/outer pair allocate a
2230 * member class.
2231 */
2232 void readInnerClasses(ClassSymbol c) {
2233 int n = nextChar();
2234 for (int i = 0; i < n; i++) {
2235 nextChar(); // skip inner class symbol
2236 ClassSymbol outer = readClassSymbol(nextChar());
2237 Name name = readName(nextChar());
2238 if (name == null) name = names.empty;
2239 long flags = adjustClassFlags(nextChar());
2240 if (outer != null) { // we have a member class
2241 if (name == names.empty)
2242 name = names.one;
2243 ClassSymbol member = enterClass(name, outer);
2244 if ((flags & STATIC) == 0) {
2245 ((ClassType)member.type).setEnclosingType(outer.type);
2246 if (member.erasure_field != null)
2247 ((ClassType)member.erasure_field).setEnclosingType(types.erasure(outer.type));
2248 }
2249 if (c == outer) {
2250 member.flags_field = flags;
2251 enterMember(c, member);
2252 }
2253 }
2254 }
2255 }
2257 /** Read a class file.
2258 */
2259 private void readClassFile(ClassSymbol c) throws IOException {
2260 int magic = nextInt();
2261 if (magic != JAVA_MAGIC)
2262 throw badClassFile("illegal.start.of.class.file");
2264 minorVersion = nextChar();
2265 majorVersion = nextChar();
2266 int maxMajor = Target.MAX().majorVersion;
2267 int maxMinor = Target.MAX().minorVersion;
2268 if (majorVersion > maxMajor ||
2269 majorVersion * 1000 + minorVersion <
2270 Target.MIN().majorVersion * 1000 + Target.MIN().minorVersion)
2271 {
2272 if (majorVersion == (maxMajor + 1))
2273 log.warning("big.major.version",
2274 currentClassFile,
2275 majorVersion,
2276 maxMajor);
2277 else
2278 throw badClassFile("wrong.version",
2279 Integer.toString(majorVersion),
2280 Integer.toString(minorVersion),
2281 Integer.toString(maxMajor),
2282 Integer.toString(maxMinor));
2283 }
2284 else if (checkClassFile &&
2285 majorVersion == maxMajor &&
2286 minorVersion > maxMinor)
2287 {
2288 printCCF("found.later.version",
2289 Integer.toString(minorVersion));
2290 }
2291 indexPool();
2292 if (signatureBuffer.length < bp) {
2293 int ns = Integer.highestOneBit(bp) << 1;
2294 signatureBuffer = new byte[ns];
2295 }
2296 readClass(c);
2297 }
2299 /************************************************************************
2300 * Adjusting flags
2301 ***********************************************************************/
2303 long adjustFieldFlags(long flags) {
2304 return flags;
2305 }
2306 long adjustMethodFlags(long flags) {
2307 if ((flags & ACC_BRIDGE) != 0) {
2308 flags &= ~ACC_BRIDGE;
2309 flags |= BRIDGE;
2310 if (!allowGenerics)
2311 flags &= ~SYNTHETIC;
2312 }
2313 if ((flags & ACC_VARARGS) != 0) {
2314 flags &= ~ACC_VARARGS;
2315 flags |= VARARGS;
2316 }
2317 return flags;
2318 }
2319 long adjustClassFlags(long flags) {
2320 return flags & ~ACC_SUPER; // SUPER and SYNCHRONIZED bits overloaded
2321 }
2323 /************************************************************************
2324 * Loading Classes
2325 ***********************************************************************/
2327 /** Define a new class given its name and owner.
2328 */
2329 public ClassSymbol defineClass(Name name, Symbol owner) {
2330 ClassSymbol c = new ClassSymbol(0, name, owner);
2331 if (owner.kind == PCK)
2332 Assert.checkNull(classes.get(c.flatname), c);
2333 c.completer = thisCompleter;
2334 return c;
2335 }
2337 /** Create a new toplevel or member class symbol with given name
2338 * and owner and enter in `classes' unless already there.
2339 */
2340 public ClassSymbol enterClass(Name name, TypeSymbol owner) {
2341 Name flatname = TypeSymbol.formFlatName(name, owner);
2342 ClassSymbol c = classes.get(flatname);
2343 if (c == null) {
2344 c = defineClass(name, owner);
2345 classes.put(flatname, c);
2346 } else if ((c.name != name || c.owner != owner) && owner.kind == TYP && c.owner.kind == PCK) {
2347 // reassign fields of classes that might have been loaded with
2348 // their flat names.
2349 c.owner.members().remove(c);
2350 c.name = name;
2351 c.owner = owner;
2352 c.fullname = ClassSymbol.formFullName(name, owner);
2353 }
2354 return c;
2355 }
2357 /**
2358 * Creates a new toplevel class symbol with given flat name and
2359 * given class (or source) file.
2360 *
2361 * @param flatName a fully qualified binary class name
2362 * @param classFile the class file or compilation unit defining
2363 * the class (may be {@code null})
2364 * @return a newly created class symbol
2365 * @throws AssertionError if the class symbol already exists
2366 */
2367 public ClassSymbol enterClass(Name flatName, JavaFileObject classFile) {
2368 ClassSymbol cs = classes.get(flatName);
2369 if (cs != null) {
2370 String msg = Log.format("%s: completer = %s; class file = %s; source file = %s",
2371 cs.fullname,
2372 cs.completer,
2373 cs.classfile,
2374 cs.sourcefile);
2375 throw new AssertionError(msg);
2376 }
2377 Name packageName = Convert.packagePart(flatName);
2378 PackageSymbol owner = packageName.isEmpty()
2379 ? syms.unnamedPackage
2380 : enterPackage(packageName);
2381 cs = defineClass(Convert.shortName(flatName), owner);
2382 cs.classfile = classFile;
2383 classes.put(flatName, cs);
2384 return cs;
2385 }
2387 /** Create a new member or toplevel class symbol with given flat name
2388 * and enter in `classes' unless already there.
2389 */
2390 public ClassSymbol enterClass(Name flatname) {
2391 ClassSymbol c = classes.get(flatname);
2392 if (c == null)
2393 return enterClass(flatname, (JavaFileObject)null);
2394 else
2395 return c;
2396 }
2398 private boolean suppressFlush = false;
2400 /** Completion for classes to be loaded. Before a class is loaded
2401 * we make sure its enclosing class (if any) is loaded.
2402 */
2403 private void complete(Symbol sym) throws CompletionFailure {
2404 if (sym.kind == TYP) {
2405 ClassSymbol c = (ClassSymbol)sym;
2406 c.members_field = new Scope.ErrorScope(c); // make sure it's always defined
2407 boolean saveSuppressFlush = suppressFlush;
2408 suppressFlush = true;
2409 try {
2410 completeOwners(c.owner);
2411 completeEnclosing(c);
2412 } finally {
2413 suppressFlush = saveSuppressFlush;
2414 }
2415 fillIn(c);
2416 } else if (sym.kind == PCK) {
2417 PackageSymbol p = (PackageSymbol)sym;
2418 try {
2419 fillIn(p);
2420 } catch (IOException ex) {
2421 throw new CompletionFailure(sym, ex.getLocalizedMessage()).initCause(ex);
2422 }
2423 }
2424 if (!filling && !suppressFlush)
2425 annotate.flush(); // finish attaching annotations
2426 }
2428 /** complete up through the enclosing package. */
2429 private void completeOwners(Symbol o) {
2430 if (o.kind != PCK) completeOwners(o.owner);
2431 o.complete();
2432 }
2434 /**
2435 * Tries to complete lexically enclosing classes if c looks like a
2436 * nested class. This is similar to completeOwners but handles
2437 * the situation when a nested class is accessed directly as it is
2438 * possible with the Tree API or javax.lang.model.*.
2439 */
2440 private void completeEnclosing(ClassSymbol c) {
2441 if (c.owner.kind == PCK) {
2442 Symbol owner = c.owner;
2443 for (Name name : Convert.enclosingCandidates(Convert.shortName(c.name))) {
2444 Symbol encl = owner.members().lookup(name).sym;
2445 if (encl == null)
2446 encl = classes.get(TypeSymbol.formFlatName(name, owner));
2447 if (encl != null)
2448 encl.complete();
2449 }
2450 }
2451 }
2453 /** We can only read a single class file at a time; this
2454 * flag keeps track of when we are currently reading a class
2455 * file.
2456 */
2457 private boolean filling = false;
2459 /** Fill in definition of class `c' from corresponding class or
2460 * source file.
2461 */
2462 private void fillIn(ClassSymbol c) {
2463 if (completionFailureName == c.fullname) {
2464 throw new CompletionFailure(c, "user-selected completion failure by class name");
2465 }
2466 currentOwner = c;
2467 warnedAttrs.clear();
2468 JavaFileObject classfile = c.classfile;
2469 if (classfile != null) {
2470 JavaFileObject previousClassFile = currentClassFile;
2471 try {
2472 if (filling) {
2473 Assert.error("Filling " + classfile.toUri() + " during " + previousClassFile);
2474 }
2475 currentClassFile = classfile;
2476 if (verbose) {
2477 log.printVerbose("loading", currentClassFile.toString());
2478 }
2479 if (classfile.getKind() == JavaFileObject.Kind.CLASS) {
2480 filling = true;
2481 try {
2482 bp = 0;
2483 buf = readInputStream(buf, classfile.openInputStream());
2484 readClassFile(c);
2485 if (!missingTypeVariables.isEmpty() && !foundTypeVariables.isEmpty()) {
2486 List<Type> missing = missingTypeVariables;
2487 List<Type> found = foundTypeVariables;
2488 missingTypeVariables = List.nil();
2489 foundTypeVariables = List.nil();
2490 filling = false;
2491 ClassType ct = (ClassType)currentOwner.type;
2492 ct.supertype_field =
2493 types.subst(ct.supertype_field, missing, found);
2494 ct.interfaces_field =
2495 types.subst(ct.interfaces_field, missing, found);
2496 } else if (missingTypeVariables.isEmpty() !=
2497 foundTypeVariables.isEmpty()) {
2498 Name name = missingTypeVariables.head.tsym.name;
2499 throw badClassFile("undecl.type.var", name);
2500 }
2501 } finally {
2502 missingTypeVariables = List.nil();
2503 foundTypeVariables = List.nil();
2504 filling = false;
2505 }
2506 } else {
2507 if (sourceCompleter != null) {
2508 sourceCompleter.complete(c);
2509 } else {
2510 throw new IllegalStateException("Source completer required to read "
2511 + classfile.toUri());
2512 }
2513 }
2514 return;
2515 } catch (IOException ex) {
2516 throw badClassFile("unable.to.access.file", ex.getMessage());
2517 } finally {
2518 currentClassFile = previousClassFile;
2519 }
2520 } else {
2521 JCDiagnostic diag =
2522 diagFactory.fragment("class.file.not.found", c.flatname);
2523 throw
2524 newCompletionFailure(c, diag);
2525 }
2526 }
2527 // where
2528 private static byte[] readInputStream(byte[] buf, InputStream s) throws IOException {
2529 try {
2530 buf = ensureCapacity(buf, s.available());
2531 int r = s.read(buf);
2532 int bp = 0;
2533 while (r != -1) {
2534 bp += r;
2535 buf = ensureCapacity(buf, bp);
2536 r = s.read(buf, bp, buf.length - bp);
2537 }
2538 return buf;
2539 } finally {
2540 try {
2541 s.close();
2542 } catch (IOException e) {
2543 /* Ignore any errors, as this stream may have already
2544 * thrown a related exception which is the one that
2545 * should be reported.
2546 */
2547 }
2548 }
2549 }
2550 /*
2551 * ensureCapacity will increase the buffer as needed, taking note that
2552 * the new buffer will always be greater than the needed and never
2553 * exactly equal to the needed size or bp. If equal then the read (above)
2554 * will infinitely loop as buf.length - bp == 0.
2555 */
2556 private static byte[] ensureCapacity(byte[] buf, int needed) {
2557 if (buf.length <= needed) {
2558 byte[] old = buf;
2559 buf = new byte[Integer.highestOneBit(needed) << 1];
2560 System.arraycopy(old, 0, buf, 0, old.length);
2561 }
2562 return buf;
2563 }
2564 /** Static factory for CompletionFailure objects.
2565 * In practice, only one can be used at a time, so we share one
2566 * to reduce the expense of allocating new exception objects.
2567 */
2568 private CompletionFailure newCompletionFailure(TypeSymbol c,
2569 JCDiagnostic diag) {
2570 if (!cacheCompletionFailure) {
2571 // log.warning("proc.messager",
2572 // Log.getLocalizedString("class.file.not.found", c.flatname));
2573 // c.debug.printStackTrace();
2574 return new CompletionFailure(c, diag);
2575 } else {
2576 CompletionFailure result = cachedCompletionFailure;
2577 result.sym = c;
2578 result.diag = diag;
2579 return result;
2580 }
2581 }
2582 private CompletionFailure cachedCompletionFailure =
2583 new CompletionFailure(null, (JCDiagnostic) null);
2584 {
2585 cachedCompletionFailure.setStackTrace(new StackTraceElement[0]);
2586 }
2588 /** Load a toplevel class with given fully qualified name
2589 * The class is entered into `classes' only if load was successful.
2590 */
2591 public ClassSymbol loadClass(Name flatname) throws CompletionFailure {
2592 boolean absent = classes.get(flatname) == null;
2593 ClassSymbol c = enterClass(flatname);
2594 if (c.members_field == null && c.completer != null) {
2595 try {
2596 c.complete();
2597 } catch (CompletionFailure ex) {
2598 if (absent) classes.remove(flatname);
2599 throw ex;
2600 }
2601 }
2602 return c;
2603 }
2605 /************************************************************************
2606 * Loading Packages
2607 ***********************************************************************/
2609 /** Check to see if a package exists, given its fully qualified name.
2610 */
2611 public boolean packageExists(Name fullname) {
2612 return enterPackage(fullname).exists();
2613 }
2615 /** Make a package, given its fully qualified name.
2616 */
2617 public PackageSymbol enterPackage(Name fullname) {
2618 PackageSymbol p = packages.get(fullname);
2619 if (p == null) {
2620 Assert.check(!fullname.isEmpty(), "rootPackage missing!");
2621 p = new PackageSymbol(
2622 Convert.shortName(fullname),
2623 enterPackage(Convert.packagePart(fullname)));
2624 p.completer = thisCompleter;
2625 packages.put(fullname, p);
2626 }
2627 return p;
2628 }
2630 /** Make a package, given its unqualified name and enclosing package.
2631 */
2632 public PackageSymbol enterPackage(Name name, PackageSymbol owner) {
2633 return enterPackage(TypeSymbol.formFullName(name, owner));
2634 }
2636 /** Include class corresponding to given class file in package,
2637 * unless (1) we already have one the same kind (.class or .java), or
2638 * (2) we have one of the other kind, and the given class file
2639 * is older.
2640 */
2641 protected void includeClassFile(PackageSymbol p, JavaFileObject file) {
2642 if ((p.flags_field & EXISTS) == 0)
2643 for (Symbol q = p; q != null && q.kind == PCK; q = q.owner)
2644 q.flags_field |= EXISTS;
2645 JavaFileObject.Kind kind = file.getKind();
2646 int seen;
2647 if (kind == JavaFileObject.Kind.CLASS)
2648 seen = CLASS_SEEN;
2649 else
2650 seen = SOURCE_SEEN;
2651 String binaryName = fileManager.inferBinaryName(currentLoc, file);
2652 int lastDot = binaryName.lastIndexOf(".");
2653 Name classname = names.fromString(binaryName.substring(lastDot + 1));
2654 boolean isPkgInfo = classname == names.package_info;
2655 ClassSymbol c = isPkgInfo
2656 ? p.package_info
2657 : (ClassSymbol) p.members_field.lookup(classname).sym;
2658 if (c == null) {
2659 c = enterClass(classname, p);
2660 if (c.classfile == null) // only update the file if's it's newly created
2661 c.classfile = file;
2662 if (isPkgInfo) {
2663 p.package_info = c;
2664 } else {
2665 if (c.owner == p) // it might be an inner class
2666 p.members_field.enter(c);
2667 }
2668 } else if (c.classfile != null && (c.flags_field & seen) == 0) {
2669 // if c.classfile == null, we are currently compiling this class
2670 // and no further action is necessary.
2671 // if (c.flags_field & seen) != 0, we have already encountered
2672 // a file of the same kind; again no further action is necessary.
2673 if ((c.flags_field & (CLASS_SEEN | SOURCE_SEEN)) != 0)
2674 c.classfile = preferredFileObject(file, c.classfile);
2675 }
2676 c.flags_field |= seen;
2677 }
2679 /** Implement policy to choose to derive information from a source
2680 * file or a class file when both are present. May be overridden
2681 * by subclasses.
2682 */
2683 protected JavaFileObject preferredFileObject(JavaFileObject a,
2684 JavaFileObject b) {
2686 if (preferSource)
2687 return (a.getKind() == JavaFileObject.Kind.SOURCE) ? a : b;
2688 else {
2689 long adate = a.getLastModified();
2690 long bdate = b.getLastModified();
2691 // 6449326: policy for bad lastModifiedTime in ClassReader
2692 //assert adate >= 0 && bdate >= 0;
2693 return (adate > bdate) ? a : b;
2694 }
2695 }
2697 /**
2698 * specifies types of files to be read when filling in a package symbol
2699 */
2700 protected EnumSet<JavaFileObject.Kind> getPackageFileKinds() {
2701 return EnumSet.of(JavaFileObject.Kind.CLASS, JavaFileObject.Kind.SOURCE);
2702 }
2704 /**
2705 * this is used to support javadoc
2706 */
2707 protected void extraFileActions(PackageSymbol pack, JavaFileObject fe) {
2708 }
2710 protected Location currentLoc; // FIXME
2712 private boolean verbosePath = true;
2714 /** Load directory of package into members scope.
2715 */
2716 private void fillIn(PackageSymbol p) throws IOException {
2717 if (p.members_field == null) p.members_field = new Scope(p);
2718 String packageName = p.fullname.toString();
2720 Set<JavaFileObject.Kind> kinds = getPackageFileKinds();
2722 fillIn(p, PLATFORM_CLASS_PATH,
2723 fileManager.list(PLATFORM_CLASS_PATH,
2724 packageName,
2725 EnumSet.of(JavaFileObject.Kind.CLASS),
2726 false));
2728 Set<JavaFileObject.Kind> classKinds = EnumSet.copyOf(kinds);
2729 classKinds.remove(JavaFileObject.Kind.SOURCE);
2730 boolean wantClassFiles = !classKinds.isEmpty();
2732 Set<JavaFileObject.Kind> sourceKinds = EnumSet.copyOf(kinds);
2733 sourceKinds.remove(JavaFileObject.Kind.CLASS);
2734 boolean wantSourceFiles = !sourceKinds.isEmpty();
2736 boolean haveSourcePath = fileManager.hasLocation(SOURCE_PATH);
2738 if (verbose && verbosePath) {
2739 if (fileManager instanceof StandardJavaFileManager) {
2740 StandardJavaFileManager fm = (StandardJavaFileManager)fileManager;
2741 if (haveSourcePath && wantSourceFiles) {
2742 List<File> path = List.nil();
2743 for (File file : fm.getLocation(SOURCE_PATH)) {
2744 path = path.prepend(file);
2745 }
2746 log.printVerbose("sourcepath", path.reverse().toString());
2747 } else if (wantSourceFiles) {
2748 List<File> path = List.nil();
2749 for (File file : fm.getLocation(CLASS_PATH)) {
2750 path = path.prepend(file);
2751 }
2752 log.printVerbose("sourcepath", path.reverse().toString());
2753 }
2754 if (wantClassFiles) {
2755 List<File> path = List.nil();
2756 for (File file : fm.getLocation(PLATFORM_CLASS_PATH)) {
2757 path = path.prepend(file);
2758 }
2759 for (File file : fm.getLocation(CLASS_PATH)) {
2760 path = path.prepend(file);
2761 }
2762 log.printVerbose("classpath", path.reverse().toString());
2763 }
2764 }
2765 }
2767 if (wantSourceFiles && !haveSourcePath) {
2768 fillIn(p, CLASS_PATH,
2769 fileManager.list(CLASS_PATH,
2770 packageName,
2771 kinds,
2772 false));
2773 } else {
2774 if (wantClassFiles)
2775 fillIn(p, CLASS_PATH,
2776 fileManager.list(CLASS_PATH,
2777 packageName,
2778 classKinds,
2779 false));
2780 if (wantSourceFiles)
2781 fillIn(p, SOURCE_PATH,
2782 fileManager.list(SOURCE_PATH,
2783 packageName,
2784 sourceKinds,
2785 false));
2786 }
2787 verbosePath = false;
2788 }
2789 // where
2790 private void fillIn(PackageSymbol p,
2791 Location location,
2792 Iterable<JavaFileObject> files)
2793 {
2794 currentLoc = location;
2795 for (JavaFileObject fo : files) {
2796 switch (fo.getKind()) {
2797 case CLASS:
2798 case SOURCE: {
2799 // TODO pass binaryName to includeClassFile
2800 String binaryName = fileManager.inferBinaryName(currentLoc, fo);
2801 String simpleName = binaryName.substring(binaryName.lastIndexOf(".") + 1);
2802 if (SourceVersion.isIdentifier(simpleName) ||
2803 simpleName.equals("package-info"))
2804 includeClassFile(p, fo);
2805 break;
2806 }
2807 default:
2808 extraFileActions(p, fo);
2809 }
2810 }
2811 }
2813 /** Output for "-checkclassfile" option.
2814 * @param key The key to look up the correct internationalized string.
2815 * @param arg An argument for substitution into the output string.
2816 */
2817 private void printCCF(String key, Object arg) {
2818 log.printLines(key, arg);
2819 }
2822 public interface SourceCompleter {
2823 void complete(ClassSymbol sym)
2824 throws CompletionFailure;
2825 }
2827 /**
2828 * A subclass of JavaFileObject for the sourcefile attribute found in a classfile.
2829 * The attribute is only the last component of the original filename, so is unlikely
2830 * to be valid as is, so operations other than those to access the name throw
2831 * UnsupportedOperationException
2832 */
2833 private static class SourceFileObject extends BaseFileObject {
2835 /** The file's name.
2836 */
2837 private Name name;
2838 private Name flatname;
2840 public SourceFileObject(Name name, Name flatname) {
2841 super(null); // no file manager; never referenced for this file object
2842 this.name = name;
2843 this.flatname = flatname;
2844 }
2846 @Override
2847 public URI toUri() {
2848 try {
2849 return new URI(null, name.toString(), null);
2850 } catch (URISyntaxException e) {
2851 throw new CannotCreateUriError(name.toString(), e);
2852 }
2853 }
2855 @Override
2856 public String getName() {
2857 return name.toString();
2858 }
2860 @Override
2861 public String getShortName() {
2862 return getName();
2863 }
2865 @Override
2866 public JavaFileObject.Kind getKind() {
2867 return getKind(getName());
2868 }
2870 @Override
2871 public InputStream openInputStream() {
2872 throw new UnsupportedOperationException();
2873 }
2875 @Override
2876 public OutputStream openOutputStream() {
2877 throw new UnsupportedOperationException();
2878 }
2880 @Override
2881 public CharBuffer getCharContent(boolean ignoreEncodingErrors) {
2882 throw new UnsupportedOperationException();
2883 }
2885 @Override
2886 public Reader openReader(boolean ignoreEncodingErrors) {
2887 throw new UnsupportedOperationException();
2888 }
2890 @Override
2891 public Writer openWriter() {
2892 throw new UnsupportedOperationException();
2893 }
2895 @Override
2896 public long getLastModified() {
2897 throw new UnsupportedOperationException();
2898 }
2900 @Override
2901 public boolean delete() {
2902 throw new UnsupportedOperationException();
2903 }
2905 @Override
2906 protected String inferBinaryName(Iterable<? extends File> path) {
2907 return flatname.toString();
2908 }
2910 @Override
2911 public boolean isNameCompatible(String simpleName, JavaFileObject.Kind kind) {
2912 return true; // fail-safe mode
2913 }
2915 /**
2916 * Check if two file objects are equal.
2917 * SourceFileObjects are just placeholder objects for the value of a
2918 * SourceFile attribute, and do not directly represent specific files.
2919 * Two SourceFileObjects are equal if their names are equal.
2920 */
2921 @Override
2922 public boolean equals(Object other) {
2923 if (this == other)
2924 return true;
2926 if (!(other instanceof SourceFileObject))
2927 return false;
2929 SourceFileObject o = (SourceFileObject) other;
2930 return name.equals(o.name);
2931 }
2933 @Override
2934 public int hashCode() {
2935 return name.hashCode();
2936 }
2937 }
2938 }
