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src/share/classes/com/sun/tools/javac/jvm/ClassReader.java@6118072811e5
src/share/classes/com/sun/tools/javac/jvm/ClassReader.java
Thu, 21 Feb 2013 17:49:56 -0800
- author
- lana
- date
- Thu, 21 Feb 2013 17:49:56 -0800
- changeset 1603
- 6118072811e5
- parent 1592
- 9345394ac8fe
- parent 1571
- af8417e590f4
- child 1755
- ddb4a2bfcd82
- permissions
- -rw-r--r--
Merge
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 implements Completer {
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 /** Get the ClassReader instance for this invocation. */
238 public static ClassReader instance(Context context) {
239 ClassReader instance = context.get(classReaderKey);
240 if (instance == null)
241 instance = new ClassReader(context, true);
242 return instance;
243 }
245 /** Initialize classes and packages, treating this as the definitive classreader. */
246 public void init(Symtab syms) {
247 init(syms, true);
248 }
250 /** Initialize classes and packages, optionally treating this as
251 * the definitive classreader.
252 */
253 private void init(Symtab syms, boolean definitive) {
254 if (classes != null) return;
256 if (definitive) {
257 Assert.check(packages == null || packages == syms.packages);
258 packages = syms.packages;
259 Assert.check(classes == null || classes == syms.classes);
260 classes = syms.classes;
261 } else {
262 packages = new HashMap<Name, PackageSymbol>();
263 classes = new HashMap<Name, ClassSymbol>();
264 }
266 packages.put(names.empty, syms.rootPackage);
267 syms.rootPackage.completer = this;
268 syms.unnamedPackage.completer = this;
269 }
271 /** Construct a new class reader, optionally treated as the
272 * definitive classreader for this invocation.
273 */
274 protected ClassReader(Context context, boolean definitive) {
275 if (definitive) context.put(classReaderKey, this);
277 names = Names.instance(context);
278 syms = Symtab.instance(context);
279 types = Types.instance(context);
280 fileManager = context.get(JavaFileManager.class);
281 if (fileManager == null)
282 throw new AssertionError("FileManager initialization error");
283 diagFactory = JCDiagnostic.Factory.instance(context);
285 init(syms, definitive);
286 log = Log.instance(context);
288 Options options = Options.instance(context);
289 annotate = Annotate.instance(context);
290 verbose = options.isSet(VERBOSE);
291 checkClassFile = options.isSet("-checkclassfile");
293 Source source = Source.instance(context);
294 allowGenerics = source.allowGenerics();
295 allowVarargs = source.allowVarargs();
296 allowAnnotations = source.allowAnnotations();
297 allowSimplifiedVarargs = source.allowSimplifiedVarargs();
298 allowDefaultMethods = source.allowDefaultMethods();
300 saveParameterNames = options.isSet("save-parameter-names");
301 cacheCompletionFailure = options.isUnset("dev");
302 preferSource = "source".equals(options.get("-Xprefer"));
304 profile = Profile.instance(context);
306 completionFailureName =
307 options.isSet("failcomplete")
308 ? names.fromString(options.get("failcomplete"))
309 : null;
311 typevars = new Scope(syms.noSymbol);
313 lintClassfile = Lint.instance(context).isEnabled(LintCategory.CLASSFILE);
315 initAttributeReaders();
316 }
318 /** Add member to class unless it is synthetic.
319 */
320 private void enterMember(ClassSymbol c, Symbol sym) {
321 // Synthetic members are not entered -- reason lost to history (optimization?).
322 // Lambda methods must be entered because they may have inner classes (which reference them)
323 if ((sym.flags_field & (SYNTHETIC|BRIDGE)) != SYNTHETIC || sym.name.startsWith(names.lambda))
324 c.members_field.enter(sym);
325 }
327 /************************************************************************
328 * Error Diagnoses
329 ***********************************************************************/
332 public class BadClassFile extends CompletionFailure {
333 private static final long serialVersionUID = 0;
335 public BadClassFile(TypeSymbol sym, JavaFileObject file, JCDiagnostic diag) {
336 super(sym, createBadClassFileDiagnostic(file, diag));
337 }
338 }
339 // where
340 private JCDiagnostic createBadClassFileDiagnostic(JavaFileObject file, JCDiagnostic diag) {
341 String key = (file.getKind() == JavaFileObject.Kind.SOURCE
342 ? "bad.source.file.header" : "bad.class.file.header");
343 return diagFactory.fragment(key, file, diag);
344 }
346 public BadClassFile badClassFile(String key, Object... args) {
347 return new BadClassFile (
348 currentOwner.enclClass(),
349 currentClassFile,
350 diagFactory.fragment(key, args));
351 }
353 /************************************************************************
354 * Buffer Access
355 ***********************************************************************/
357 /** Read a character.
358 */
359 char nextChar() {
360 return (char)(((buf[bp++] & 0xFF) << 8) + (buf[bp++] & 0xFF));
361 }
363 /** Read a byte.
364 */
365 int nextByte() {
366 return buf[bp++] & 0xFF;
367 }
369 /** Read an integer.
370 */
371 int nextInt() {
372 return
373 ((buf[bp++] & 0xFF) << 24) +
374 ((buf[bp++] & 0xFF) << 16) +
375 ((buf[bp++] & 0xFF) << 8) +
376 (buf[bp++] & 0xFF);
377 }
379 /** Extract a character at position bp from buf.
380 */
381 char getChar(int bp) {
382 return
383 (char)(((buf[bp] & 0xFF) << 8) + (buf[bp+1] & 0xFF));
384 }
386 /** Extract an integer at position bp from buf.
387 */
388 int getInt(int bp) {
389 return
390 ((buf[bp] & 0xFF) << 24) +
391 ((buf[bp+1] & 0xFF) << 16) +
392 ((buf[bp+2] & 0xFF) << 8) +
393 (buf[bp+3] & 0xFF);
394 }
397 /** Extract a long integer at position bp from buf.
398 */
399 long getLong(int bp) {
400 DataInputStream bufin =
401 new DataInputStream(new ByteArrayInputStream(buf, bp, 8));
402 try {
403 return bufin.readLong();
404 } catch (IOException e) {
405 throw new AssertionError(e);
406 }
407 }
409 /** Extract a float at position bp from buf.
410 */
411 float getFloat(int bp) {
412 DataInputStream bufin =
413 new DataInputStream(new ByteArrayInputStream(buf, bp, 4));
414 try {
415 return bufin.readFloat();
416 } catch (IOException e) {
417 throw new AssertionError(e);
418 }
419 }
421 /** Extract a double at position bp from buf.
422 */
423 double getDouble(int bp) {
424 DataInputStream bufin =
425 new DataInputStream(new ByteArrayInputStream(buf, bp, 8));
426 try {
427 return bufin.readDouble();
428 } catch (IOException e) {
429 throw new AssertionError(e);
430 }
431 }
433 /************************************************************************
434 * Constant Pool Access
435 ***********************************************************************/
437 /** Index all constant pool entries, writing their start addresses into
438 * poolIdx.
439 */
440 void indexPool() {
441 poolIdx = new int[nextChar()];
442 poolObj = new Object[poolIdx.length];
443 int i = 1;
444 while (i < poolIdx.length) {
445 poolIdx[i++] = bp;
446 byte tag = buf[bp++];
447 switch (tag) {
448 case CONSTANT_Utf8: case CONSTANT_Unicode: {
449 int len = nextChar();
450 bp = bp + len;
451 break;
452 }
453 case CONSTANT_Class:
454 case CONSTANT_String:
455 case CONSTANT_MethodType:
456 bp = bp + 2;
457 break;
458 case CONSTANT_MethodHandle:
459 bp = bp + 3;
460 break;
461 case CONSTANT_Fieldref:
462 case CONSTANT_Methodref:
463 case CONSTANT_InterfaceMethodref:
464 case CONSTANT_NameandType:
465 case CONSTANT_Integer:
466 case CONSTANT_Float:
467 case CONSTANT_InvokeDynamic:
468 bp = bp + 4;
469 break;
470 case CONSTANT_Long:
471 case CONSTANT_Double:
472 bp = bp + 8;
473 i++;
474 break;
475 default:
476 throw badClassFile("bad.const.pool.tag.at",
477 Byte.toString(tag),
478 Integer.toString(bp -1));
479 }
480 }
481 }
483 /** Read constant pool entry at start address i, use pool as a cache.
484 */
485 Object readPool(int i) {
486 Object result = poolObj[i];
487 if (result != null) return result;
489 int index = poolIdx[i];
490 if (index == 0) return null;
492 byte tag = buf[index];
493 switch (tag) {
494 case CONSTANT_Utf8:
495 poolObj[i] = names.fromUtf(buf, index + 3, getChar(index + 1));
496 break;
497 case CONSTANT_Unicode:
498 throw badClassFile("unicode.str.not.supported");
499 case CONSTANT_Class:
500 poolObj[i] = readClassOrType(getChar(index + 1));
501 break;
502 case CONSTANT_String:
503 // FIXME: (footprint) do not use toString here
504 poolObj[i] = readName(getChar(index + 1)).toString();
505 break;
506 case CONSTANT_Fieldref: {
507 ClassSymbol owner = readClassSymbol(getChar(index + 1));
508 NameAndType nt = (NameAndType)readPool(getChar(index + 3));
509 poolObj[i] = new VarSymbol(0, nt.name, nt.uniqueType.type, owner);
510 break;
511 }
512 case CONSTANT_Methodref:
513 case CONSTANT_InterfaceMethodref: {
514 ClassSymbol owner = readClassSymbol(getChar(index + 1));
515 NameAndType nt = (NameAndType)readPool(getChar(index + 3));
516 poolObj[i] = new MethodSymbol(0, nt.name, nt.uniqueType.type, owner);
517 break;
518 }
519 case CONSTANT_NameandType:
520 poolObj[i] = new NameAndType(
521 readName(getChar(index + 1)),
522 readType(getChar(index + 3)), types);
523 break;
524 case CONSTANT_Integer:
525 poolObj[i] = getInt(index + 1);
526 break;
527 case CONSTANT_Float:
528 poolObj[i] = new Float(getFloat(index + 1));
529 break;
530 case CONSTANT_Long:
531 poolObj[i] = new Long(getLong(index + 1));
532 break;
533 case CONSTANT_Double:
534 poolObj[i] = new Double(getDouble(index + 1));
535 break;
536 case CONSTANT_MethodHandle:
537 skipBytes(4);
538 break;
539 case CONSTANT_MethodType:
540 skipBytes(3);
541 break;
542 case CONSTANT_InvokeDynamic:
543 skipBytes(5);
544 break;
545 default:
546 throw badClassFile("bad.const.pool.tag", Byte.toString(tag));
547 }
548 return poolObj[i];
549 }
551 /** Read signature and convert to type.
552 */
553 Type readType(int i) {
554 int index = poolIdx[i];
555 return sigToType(buf, index + 3, getChar(index + 1));
556 }
558 /** If name is an array type or class signature, return the
559 * corresponding type; otherwise return a ClassSymbol with given name.
560 */
561 Object readClassOrType(int i) {
562 int index = poolIdx[i];
563 int len = getChar(index + 1);
564 int start = index + 3;
565 Assert.check(buf[start] == '[' || buf[start + len - 1] != ';');
566 // by the above assertion, the following test can be
567 // simplified to (buf[start] == '[')
568 return (buf[start] == '[' || buf[start + len - 1] == ';')
569 ? (Object)sigToType(buf, start, len)
570 : (Object)enterClass(names.fromUtf(internalize(buf, start,
571 len)));
572 }
574 /** Read signature and convert to type parameters.
575 */
576 List<Type> readTypeParams(int i) {
577 int index = poolIdx[i];
578 return sigToTypeParams(buf, index + 3, getChar(index + 1));
579 }
581 /** Read class entry.
582 */
583 ClassSymbol readClassSymbol(int i) {
584 return (ClassSymbol) (readPool(i));
585 }
587 /** Read name.
588 */
589 Name readName(int i) {
590 return (Name) (readPool(i));
591 }
593 /************************************************************************
594 * Reading Types
595 ***********************************************************************/
597 /** The unread portion of the currently read type is
598 * signature[sigp..siglimit-1].
599 */
600 byte[] signature;
601 int sigp;
602 int siglimit;
603 boolean sigEnterPhase = false;
605 /** Convert signature to type, where signature is a byte array segment.
606 */
607 Type sigToType(byte[] sig, int offset, int len) {
608 signature = sig;
609 sigp = offset;
610 siglimit = offset + len;
611 return sigToType();
612 }
614 /** Convert signature to type, where signature is implicit.
615 */
616 Type sigToType() {
617 switch ((char) signature[sigp]) {
618 case 'T':
619 sigp++;
620 int start = sigp;
621 while (signature[sigp] != ';') sigp++;
622 sigp++;
623 return sigEnterPhase
624 ? Type.noType
625 : findTypeVar(names.fromUtf(signature, start, sigp - 1 - start));
626 case '+': {
627 sigp++;
628 Type t = sigToType();
629 return new WildcardType(t, BoundKind.EXTENDS,
630 syms.boundClass);
631 }
632 case '*':
633 sigp++;
634 return new WildcardType(syms.objectType, BoundKind.UNBOUND,
635 syms.boundClass);
636 case '-': {
637 sigp++;
638 Type t = sigToType();
639 return new WildcardType(t, BoundKind.SUPER,
640 syms.boundClass);
641 }
642 case 'B':
643 sigp++;
644 return syms.byteType;
645 case 'C':
646 sigp++;
647 return syms.charType;
648 case 'D':
649 sigp++;
650 return syms.doubleType;
651 case 'F':
652 sigp++;
653 return syms.floatType;
654 case 'I':
655 sigp++;
656 return syms.intType;
657 case 'J':
658 sigp++;
659 return syms.longType;
660 case 'L':
661 {
662 // int oldsigp = sigp;
663 Type t = classSigToType();
664 if (sigp < siglimit && signature[sigp] == '.')
665 throw badClassFile("deprecated inner class signature syntax " +
666 "(please recompile from source)");
667 /*
668 System.err.println(" decoded " +
669 new String(signature, oldsigp, sigp-oldsigp) +
670 " => " + t + " outer " + t.outer());
671 */
672 return t;
673 }
674 case 'S':
675 sigp++;
676 return syms.shortType;
677 case 'V':
678 sigp++;
679 return syms.voidType;
680 case 'Z':
681 sigp++;
682 return syms.booleanType;
683 case '[':
684 sigp++;
685 return new ArrayType(sigToType(), syms.arrayClass);
686 case '(':
687 sigp++;
688 List<Type> argtypes = sigToTypes(')');
689 Type restype = sigToType();
690 List<Type> thrown = List.nil();
691 while (signature[sigp] == '^') {
692 sigp++;
693 thrown = thrown.prepend(sigToType());
694 }
695 return new MethodType(argtypes,
696 restype,
697 thrown.reverse(),
698 syms.methodClass);
699 case '<':
700 typevars = typevars.dup(currentOwner);
701 Type poly = new ForAll(sigToTypeParams(), sigToType());
702 typevars = typevars.leave();
703 return poly;
704 default:
705 throw badClassFile("bad.signature",
706 Convert.utf2string(signature, sigp, 10));
707 }
708 }
710 byte[] signatureBuffer = new byte[0];
711 int sbp = 0;
712 /** Convert class signature to type, where signature is implicit.
713 */
714 Type classSigToType() {
715 if (signature[sigp] != 'L')
716 throw badClassFile("bad.class.signature",
717 Convert.utf2string(signature, sigp, 10));
718 sigp++;
719 Type outer = Type.noType;
720 int startSbp = sbp;
722 while (true) {
723 final byte c = signature[sigp++];
724 switch (c) {
726 case ';': { // end
727 ClassSymbol t = enterClass(names.fromUtf(signatureBuffer,
728 startSbp,
729 sbp - startSbp));
730 if (outer == Type.noType)
731 outer = t.erasure(types);
732 else
733 outer = new ClassType(outer, List.<Type>nil(), t);
734 sbp = startSbp;
735 return outer;
736 }
738 case '<': // generic arguments
739 ClassSymbol t = enterClass(names.fromUtf(signatureBuffer,
740 startSbp,
741 sbp - startSbp));
742 outer = new ClassType(outer, sigToTypes('>'), t) {
743 boolean completed = false;
744 @Override
745 public Type getEnclosingType() {
746 if (!completed) {
747 completed = true;
748 tsym.complete();
749 Type enclosingType = tsym.type.getEnclosingType();
750 if (enclosingType != Type.noType) {
751 List<Type> typeArgs =
752 super.getEnclosingType().allparams();
753 List<Type> typeParams =
754 enclosingType.allparams();
755 if (typeParams.length() != typeArgs.length()) {
756 // no "rare" types
757 super.setEnclosingType(types.erasure(enclosingType));
758 } else {
759 super.setEnclosingType(types.subst(enclosingType,
760 typeParams,
761 typeArgs));
762 }
763 } else {
764 super.setEnclosingType(Type.noType);
765 }
766 }
767 return super.getEnclosingType();
768 }
769 @Override
770 public void setEnclosingType(Type outer) {
771 throw new UnsupportedOperationException();
772 }
773 };
774 switch (signature[sigp++]) {
775 case ';':
776 if (sigp < signature.length && signature[sigp] == '.') {
777 // support old-style GJC signatures
778 // The signature produced was
779 // Lfoo/Outer<Lfoo/X;>;.Lfoo/Outer$Inner<Lfoo/Y;>;
780 // rather than say
781 // Lfoo/Outer<Lfoo/X;>.Inner<Lfoo/Y;>;
782 // so we skip past ".Lfoo/Outer$"
783 sigp += (sbp - startSbp) + // "foo/Outer"
784 3; // ".L" and "$"
785 signatureBuffer[sbp++] = (byte)'$';
786 break;
787 } else {
788 sbp = startSbp;
789 return outer;
790 }
791 case '.':
792 signatureBuffer[sbp++] = (byte)'$';
793 break;
794 default:
795 throw new AssertionError(signature[sigp-1]);
796 }
797 continue;
799 case '.':
800 signatureBuffer[sbp++] = (byte)'$';
801 continue;
802 case '/':
803 signatureBuffer[sbp++] = (byte)'.';
804 continue;
805 default:
806 signatureBuffer[sbp++] = c;
807 continue;
808 }
809 }
810 }
812 /** Convert (implicit) signature to list of types
813 * until `terminator' is encountered.
814 */
815 List<Type> sigToTypes(char terminator) {
816 List<Type> head = List.of(null);
817 List<Type> tail = head;
818 while (signature[sigp] != terminator)
819 tail = tail.setTail(List.of(sigToType()));
820 sigp++;
821 return head.tail;
822 }
824 /** Convert signature to type parameters, where signature is a byte
825 * array segment.
826 */
827 List<Type> sigToTypeParams(byte[] sig, int offset, int len) {
828 signature = sig;
829 sigp = offset;
830 siglimit = offset + len;
831 return sigToTypeParams();
832 }
834 /** Convert signature to type parameters, where signature is implicit.
835 */
836 List<Type> sigToTypeParams() {
837 List<Type> tvars = List.nil();
838 if (signature[sigp] == '<') {
839 sigp++;
840 int start = sigp;
841 sigEnterPhase = true;
842 while (signature[sigp] != '>')
843 tvars = tvars.prepend(sigToTypeParam());
844 sigEnterPhase = false;
845 sigp = start;
846 while (signature[sigp] != '>')
847 sigToTypeParam();
848 sigp++;
849 }
850 return tvars.reverse();
851 }
853 /** Convert (implicit) signature to type parameter.
854 */
855 Type sigToTypeParam() {
856 int start = sigp;
857 while (signature[sigp] != ':') sigp++;
858 Name name = names.fromUtf(signature, start, sigp - start);
859 TypeVar tvar;
860 if (sigEnterPhase) {
861 tvar = new TypeVar(name, currentOwner, syms.botType);
862 typevars.enter(tvar.tsym);
863 } else {
864 tvar = (TypeVar)findTypeVar(name);
865 }
866 List<Type> bounds = List.nil();
867 boolean allInterfaces = false;
868 if (signature[sigp] == ':' && signature[sigp+1] == ':') {
869 sigp++;
870 allInterfaces = true;
871 }
872 while (signature[sigp] == ':') {
873 sigp++;
874 bounds = bounds.prepend(sigToType());
875 }
876 if (!sigEnterPhase) {
877 types.setBounds(tvar, bounds.reverse(), allInterfaces);
878 }
879 return tvar;
880 }
882 /** Find type variable with given name in `typevars' scope.
883 */
884 Type findTypeVar(Name name) {
885 Scope.Entry e = typevars.lookup(name);
886 if (e.scope != null) {
887 return e.sym.type;
888 } else {
889 if (readingClassAttr) {
890 // While reading the class attribute, the supertypes
891 // might refer to a type variable from an enclosing element
892 // (method or class).
893 // If the type variable is defined in the enclosing class,
894 // we can actually find it in
895 // currentOwner.owner.type.getTypeArguments()
896 // However, until we have read the enclosing method attribute
897 // we don't know for sure if this owner is correct. It could
898 // be a method and there is no way to tell before reading the
899 // enclosing method attribute.
900 TypeVar t = new TypeVar(name, currentOwner, syms.botType);
901 missingTypeVariables = missingTypeVariables.prepend(t);
902 // System.err.println("Missing type var " + name);
903 return t;
904 }
905 throw badClassFile("undecl.type.var", name);
906 }
907 }
909 /************************************************************************
910 * Reading Attributes
911 ***********************************************************************/
913 protected enum AttributeKind { CLASS, MEMBER };
914 protected abstract class AttributeReader {
915 protected AttributeReader(Name name, ClassFile.Version version, Set<AttributeKind> kinds) {
916 this.name = name;
917 this.version = version;
918 this.kinds = kinds;
919 }
921 protected boolean accepts(AttributeKind kind) {
922 if (kinds.contains(kind)) {
923 if (majorVersion > version.major || (majorVersion == version.major && minorVersion >= version.minor))
924 return true;
926 if (lintClassfile && !warnedAttrs.contains(name)) {
927 JavaFileObject prev = log.useSource(currentClassFile);
928 try {
929 log.warning(LintCategory.CLASSFILE, (DiagnosticPosition) null, "future.attr",
930 name, version.major, version.minor, majorVersion, minorVersion);
931 } finally {
932 log.useSource(prev);
933 }
934 warnedAttrs.add(name);
935 }
936 }
937 return false;
938 }
940 protected abstract void read(Symbol sym, int attrLen);
942 protected final Name name;
943 protected final ClassFile.Version version;
944 protected final Set<AttributeKind> kinds;
945 }
947 protected Set<AttributeKind> CLASS_ATTRIBUTE =
948 EnumSet.of(AttributeKind.CLASS);
949 protected Set<AttributeKind> MEMBER_ATTRIBUTE =
950 EnumSet.of(AttributeKind.MEMBER);
951 protected Set<AttributeKind> CLASS_OR_MEMBER_ATTRIBUTE =
952 EnumSet.of(AttributeKind.CLASS, AttributeKind.MEMBER);
954 protected Map<Name, AttributeReader> attributeReaders = new HashMap<Name, AttributeReader>();
956 private void initAttributeReaders() {
957 AttributeReader[] readers = {
958 // v45.3 attributes
960 new AttributeReader(names.Code, V45_3, MEMBER_ATTRIBUTE) {
961 protected void read(Symbol sym, int attrLen) {
962 if (readAllOfClassFile || saveParameterNames)
963 ((MethodSymbol)sym).code = readCode(sym);
964 else
965 bp = bp + attrLen;
966 }
967 },
969 new AttributeReader(names.ConstantValue, V45_3, MEMBER_ATTRIBUTE) {
970 protected void read(Symbol sym, int attrLen) {
971 Object v = readPool(nextChar());
972 // Ignore ConstantValue attribute if field not final.
973 if ((sym.flags() & FINAL) != 0)
974 ((VarSymbol) sym).setData(v);
975 }
976 },
978 new AttributeReader(names.Deprecated, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) {
979 protected void read(Symbol sym, int attrLen) {
980 sym.flags_field |= DEPRECATED;
981 }
982 },
984 new AttributeReader(names.Exceptions, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) {
985 protected void read(Symbol sym, int attrLen) {
986 int nexceptions = nextChar();
987 List<Type> thrown = List.nil();
988 for (int j = 0; j < nexceptions; j++)
989 thrown = thrown.prepend(readClassSymbol(nextChar()).type);
990 if (sym.type.getThrownTypes().isEmpty())
991 sym.type.asMethodType().thrown = thrown.reverse();
992 }
993 },
995 new AttributeReader(names.InnerClasses, V45_3, CLASS_ATTRIBUTE) {
996 protected void read(Symbol sym, int attrLen) {
997 ClassSymbol c = (ClassSymbol) sym;
998 readInnerClasses(c);
999 }
1000 },
1002 new AttributeReader(names.LocalVariableTable, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) {
1003 protected void read(Symbol sym, int attrLen) {
1004 int newbp = bp + attrLen;
1005 if (saveParameterNames && !sawMethodParameters) {
1006 // Pick up parameter names from the variable table.
1007 // Parameter names are not explicitly identified as such,
1008 // but all parameter name entries in the LocalVariableTable
1009 // have a start_pc of 0. Therefore, we record the name
1010 // indicies of all slots with a start_pc of zero in the
1011 // parameterNameIndicies array.
1012 // Note that this implicitly honors the JVMS spec that
1013 // there may be more than one LocalVariableTable, and that
1014 // there is no specified ordering for the entries.
1015 int numEntries = nextChar();
1016 for (int i = 0; i < numEntries; i++) {
1017 int start_pc = nextChar();
1018 int length = nextChar();
1019 int nameIndex = nextChar();
1020 int sigIndex = nextChar();
1021 int register = nextChar();
1022 if (start_pc == 0) {
1023 // ensure array large enough
1024 if (register >= parameterNameIndices.length) {
1025 int newSize = Math.max(register, parameterNameIndices.length + 8);
1026 parameterNameIndices =
1027 Arrays.copyOf(parameterNameIndices, newSize);
1028 }
1029 parameterNameIndices[register] = nameIndex;
1030 haveParameterNameIndices = true;
1031 }
1032 }
1033 }
1034 bp = newbp;
1035 }
1036 },
1038 new AttributeReader(names.MethodParameters, V52, MEMBER_ATTRIBUTE) {
1039 protected void read(Symbol sym, int attrlen) {
1040 int newbp = bp + attrlen;
1041 if (saveParameterNames) {
1042 sawMethodParameters = true;
1043 int numEntries = nextByte();
1044 parameterNameIndices = new int[numEntries];
1045 haveParameterNameIndices = true;
1046 for (int i = 0; i < numEntries; i++) {
1047 int nameIndex = nextChar();
1048 int flags = nextChar();
1049 parameterNameIndices[i] = nameIndex;
1050 }
1051 }
1052 bp = newbp;
1053 }
1054 },
1057 new AttributeReader(names.SourceFile, V45_3, CLASS_ATTRIBUTE) {
1058 protected void read(Symbol sym, int attrLen) {
1059 ClassSymbol c = (ClassSymbol) sym;
1060 Name n = readName(nextChar());
1061 c.sourcefile = new SourceFileObject(n, c.flatname);
1062 // If the class is a toplevel class, originating from a Java source file,
1063 // but the class name does not match the file name, then it is
1064 // an auxiliary class.
1065 String sn = n.toString();
1066 if (c.owner.kind == Kinds.PCK &&
1067 sn.endsWith(".java") &&
1068 !sn.equals(c.name.toString()+".java")) {
1069 c.flags_field |= AUXILIARY;
1070 }
1071 }
1072 },
1074 new AttributeReader(names.Synthetic, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) {
1075 protected void read(Symbol sym, int attrLen) {
1076 // bridge methods are visible when generics not enabled
1077 if (allowGenerics || (sym.flags_field & BRIDGE) == 0)
1078 sym.flags_field |= SYNTHETIC;
1079 }
1080 },
1082 // standard v49 attributes
1084 new AttributeReader(names.EnclosingMethod, V49, CLASS_ATTRIBUTE) {
1085 protected void read(Symbol sym, int attrLen) {
1086 int newbp = bp + attrLen;
1087 readEnclosingMethodAttr(sym);
1088 bp = newbp;
1089 }
1090 },
1092 new AttributeReader(names.Signature, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1093 @Override
1094 protected boolean accepts(AttributeKind kind) {
1095 return super.accepts(kind) && allowGenerics;
1096 }
1098 protected void read(Symbol sym, int attrLen) {
1099 if (sym.kind == TYP) {
1100 ClassSymbol c = (ClassSymbol) sym;
1101 readingClassAttr = true;
1102 try {
1103 ClassType ct1 = (ClassType)c.type;
1104 Assert.check(c == currentOwner);
1105 ct1.typarams_field = readTypeParams(nextChar());
1106 ct1.supertype_field = sigToType();
1107 ListBuffer<Type> is = new ListBuffer<Type>();
1108 while (sigp != siglimit) is.append(sigToType());
1109 ct1.interfaces_field = is.toList();
1110 } finally {
1111 readingClassAttr = false;
1112 }
1113 } else {
1114 List<Type> thrown = sym.type.getThrownTypes();
1115 sym.type = readType(nextChar());
1116 //- System.err.println(" # " + sym.type);
1117 if (sym.kind == MTH && sym.type.getThrownTypes().isEmpty())
1118 sym.type.asMethodType().thrown = thrown;
1120 }
1121 }
1122 },
1124 // v49 annotation attributes
1126 new AttributeReader(names.AnnotationDefault, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1127 protected void read(Symbol sym, int attrLen) {
1128 attachAnnotationDefault(sym);
1129 }
1130 },
1132 new AttributeReader(names.RuntimeInvisibleAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1133 protected void read(Symbol sym, int attrLen) {
1134 attachAnnotations(sym);
1135 }
1136 },
1138 new AttributeReader(names.RuntimeInvisibleParameterAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1139 protected void read(Symbol sym, int attrLen) {
1140 attachParameterAnnotations(sym);
1141 }
1142 },
1144 new AttributeReader(names.RuntimeVisibleAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1145 protected void read(Symbol sym, int attrLen) {
1146 attachAnnotations(sym);
1147 }
1148 },
1150 new AttributeReader(names.RuntimeVisibleParameterAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1151 protected void read(Symbol sym, int attrLen) {
1152 attachParameterAnnotations(sym);
1153 }
1154 },
1156 // additional "legacy" v49 attributes, superceded by flags
1158 new AttributeReader(names.Annotation, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1159 protected void read(Symbol sym, int attrLen) {
1160 if (allowAnnotations)
1161 sym.flags_field |= ANNOTATION;
1162 }
1163 },
1165 new AttributeReader(names.Bridge, V49, MEMBER_ATTRIBUTE) {
1166 protected void read(Symbol sym, int attrLen) {
1167 sym.flags_field |= BRIDGE;
1168 if (!allowGenerics)
1169 sym.flags_field &= ~SYNTHETIC;
1170 }
1171 },
1173 new AttributeReader(names.Enum, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1174 protected void read(Symbol sym, int attrLen) {
1175 sym.flags_field |= ENUM;
1176 }
1177 },
1179 new AttributeReader(names.Varargs, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1180 protected void read(Symbol sym, int attrLen) {
1181 if (allowVarargs)
1182 sym.flags_field |= VARARGS;
1183 }
1184 },
1186 new AttributeReader(names.RuntimeVisibleTypeAnnotations, V52, CLASS_OR_MEMBER_ATTRIBUTE) {
1187 protected void read(Symbol sym, int attrLen) {
1188 attachTypeAnnotations(sym);
1189 }
1190 },
1192 new AttributeReader(names.RuntimeInvisibleTypeAnnotations, V52, CLASS_OR_MEMBER_ATTRIBUTE) {
1193 protected void read(Symbol sym, int attrLen) {
1194 attachTypeAnnotations(sym);
1195 }
1196 },
1199 // The following attributes for a Code attribute are not currently handled
1200 // StackMapTable
1201 // SourceDebugExtension
1202 // LineNumberTable
1203 // LocalVariableTypeTable
1204 };
1206 for (AttributeReader r: readers)
1207 attributeReaders.put(r.name, r);
1208 }
1210 /** Report unrecognized attribute.
1211 */
1212 void unrecognized(Name attrName) {
1213 if (checkClassFile)
1214 printCCF("ccf.unrecognized.attribute", attrName);
1215 }
1219 protected void readEnclosingMethodAttr(Symbol sym) {
1220 // sym is a nested class with an "Enclosing Method" attribute
1221 // remove sym from it's current owners scope and place it in
1222 // the scope specified by the attribute
1223 sym.owner.members().remove(sym);
1224 ClassSymbol self = (ClassSymbol)sym;
1225 ClassSymbol c = readClassSymbol(nextChar());
1226 NameAndType nt = (NameAndType)readPool(nextChar());
1228 if (c.members_field == null)
1229 throw badClassFile("bad.enclosing.class", self, c);
1231 MethodSymbol m = findMethod(nt, c.members_field, self.flags());
1232 if (nt != null && m == null)
1233 throw badClassFile("bad.enclosing.method", self);
1235 self.name = simpleBinaryName(self.flatname, c.flatname) ;
1236 self.owner = m != null ? m : c;
1237 if (self.name.isEmpty())
1238 self.fullname = names.empty;
1239 else
1240 self.fullname = ClassSymbol.formFullName(self.name, self.owner);
1242 if (m != null) {
1243 ((ClassType)sym.type).setEnclosingType(m.type);
1244 } else if ((self.flags_field & STATIC) == 0) {
1245 ((ClassType)sym.type).setEnclosingType(c.type);
1246 } else {
1247 ((ClassType)sym.type).setEnclosingType(Type.noType);
1248 }
1249 enterTypevars(self);
1250 if (!missingTypeVariables.isEmpty()) {
1251 ListBuffer<Type> typeVars = new ListBuffer<Type>();
1252 for (Type typevar : missingTypeVariables) {
1253 typeVars.append(findTypeVar(typevar.tsym.name));
1254 }
1255 foundTypeVariables = typeVars.toList();
1256 } else {
1257 foundTypeVariables = List.nil();
1258 }
1259 }
1261 // See java.lang.Class
1262 private Name simpleBinaryName(Name self, Name enclosing) {
1263 String simpleBinaryName = self.toString().substring(enclosing.toString().length());
1264 if (simpleBinaryName.length() < 1 || simpleBinaryName.charAt(0) != '$')
1265 throw badClassFile("bad.enclosing.method", self);
1266 int index = 1;
1267 while (index < simpleBinaryName.length() &&
1268 isAsciiDigit(simpleBinaryName.charAt(index)))
1269 index++;
1270 return names.fromString(simpleBinaryName.substring(index));
1271 }
1273 private MethodSymbol findMethod(NameAndType nt, Scope scope, long flags) {
1274 if (nt == null)
1275 return null;
1277 MethodType type = nt.uniqueType.type.asMethodType();
1279 for (Scope.Entry e = scope.lookup(nt.name); e.scope != null; e = e.next())
1280 if (e.sym.kind == MTH && isSameBinaryType(e.sym.type.asMethodType(), type))
1281 return (MethodSymbol)e.sym;
1283 if (nt.name != names.init)
1284 // not a constructor
1285 return null;
1286 if ((flags & INTERFACE) != 0)
1287 // no enclosing instance
1288 return null;
1289 if (nt.uniqueType.type.getParameterTypes().isEmpty())
1290 // no parameters
1291 return null;
1293 // A constructor of an inner class.
1294 // Remove the first argument (the enclosing instance)
1295 nt.setType(new MethodType(nt.uniqueType.type.getParameterTypes().tail,
1296 nt.uniqueType.type.getReturnType(),
1297 nt.uniqueType.type.getThrownTypes(),
1298 syms.methodClass));
1299 // Try searching again
1300 return findMethod(nt, scope, flags);
1301 }
1303 /** Similar to Types.isSameType but avoids completion */
1304 private boolean isSameBinaryType(MethodType mt1, MethodType mt2) {
1305 List<Type> types1 = types.erasure(mt1.getParameterTypes())
1306 .prepend(types.erasure(mt1.getReturnType()));
1307 List<Type> types2 = mt2.getParameterTypes().prepend(mt2.getReturnType());
1308 while (!types1.isEmpty() && !types2.isEmpty()) {
1309 if (types1.head.tsym != types2.head.tsym)
1310 return false;
1311 types1 = types1.tail;
1312 types2 = types2.tail;
1313 }
1314 return types1.isEmpty() && types2.isEmpty();
1315 }
1317 /**
1318 * Character.isDigit answers <tt>true</tt> to some non-ascii
1319 * digits. This one does not. <b>copied from java.lang.Class</b>
1320 */
1321 private static boolean isAsciiDigit(char c) {
1322 return '0' <= c && c <= '9';
1323 }
1325 /** Read member attributes.
1326 */
1327 void readMemberAttrs(Symbol sym) {
1328 readAttrs(sym, AttributeKind.MEMBER);
1329 }
1331 void readAttrs(Symbol sym, AttributeKind kind) {
1332 char ac = nextChar();
1333 for (int i = 0; i < ac; i++) {
1334 Name attrName = readName(nextChar());
1335 int attrLen = nextInt();
1336 AttributeReader r = attributeReaders.get(attrName);
1337 if (r != null && r.accepts(kind))
1338 r.read(sym, attrLen);
1339 else {
1340 unrecognized(attrName);
1341 bp = bp + attrLen;
1342 }
1343 }
1344 }
1346 private boolean readingClassAttr = false;
1347 private List<Type> missingTypeVariables = List.nil();
1348 private List<Type> foundTypeVariables = List.nil();
1350 /** Read class attributes.
1351 */
1352 void readClassAttrs(ClassSymbol c) {
1353 readAttrs(c, AttributeKind.CLASS);
1354 }
1356 /** Read code block.
1357 */
1358 Code readCode(Symbol owner) {
1359 nextChar(); // max_stack
1360 nextChar(); // max_locals
1361 final int code_length = nextInt();
1362 bp += code_length;
1363 final char exception_table_length = nextChar();
1364 bp += exception_table_length * 8;
1365 readMemberAttrs(owner);
1366 return null;
1367 }
1369 /************************************************************************
1370 * Reading Java-language annotations
1371 ***********************************************************************/
1373 /** Attach annotations.
1374 */
1375 void attachAnnotations(final Symbol sym) {
1376 int numAttributes = nextChar();
1377 if (numAttributes != 0) {
1378 ListBuffer<CompoundAnnotationProxy> proxies =
1379 new ListBuffer<CompoundAnnotationProxy>();
1380 for (int i = 0; i<numAttributes; i++) {
1381 CompoundAnnotationProxy proxy = readCompoundAnnotation();
1382 if (proxy.type.tsym == syms.proprietaryType.tsym)
1383 sym.flags_field |= PROPRIETARY;
1384 else if (proxy.type.tsym == syms.profileType.tsym) {
1385 if (profile != Profile.DEFAULT) {
1386 for (Pair<Name,Attribute> v: proxy.values) {
1387 if (v.fst == names.value && v.snd instanceof Attribute.Constant) {
1388 Attribute.Constant c = (Attribute.Constant) v.snd;
1389 if (c.type == syms.intType && ((Integer) c.value) > profile.value) {
1390 sym.flags_field |= NOT_IN_PROFILE;
1391 }
1392 }
1393 }
1394 }
1395 } else
1396 proxies.append(proxy);
1397 }
1398 annotate.normal(new AnnotationCompleter(sym, proxies.toList()));
1399 }
1400 }
1402 /** Attach parameter annotations.
1403 */
1404 void attachParameterAnnotations(final Symbol method) {
1405 final MethodSymbol meth = (MethodSymbol)method;
1406 int numParameters = buf[bp++] & 0xFF;
1407 List<VarSymbol> parameters = meth.params();
1408 int pnum = 0;
1409 while (parameters.tail != null) {
1410 attachAnnotations(parameters.head);
1411 parameters = parameters.tail;
1412 pnum++;
1413 }
1414 if (pnum != numParameters) {
1415 throw badClassFile("bad.runtime.invisible.param.annotations", meth);
1416 }
1417 }
1419 void attachTypeAnnotations(final Symbol sym) {
1420 int numAttributes = nextChar();
1421 if (numAttributes != 0) {
1422 ListBuffer<TypeAnnotationProxy> proxies =
1423 ListBuffer.lb();
1424 for (int i = 0; i < numAttributes; i++)
1425 proxies.append(readTypeAnnotation());
1426 annotate.normal(new TypeAnnotationCompleter(sym, proxies.toList()));
1427 }
1428 }
1430 /** Attach the default value for an annotation element.
1431 */
1432 void attachAnnotationDefault(final Symbol sym) {
1433 final MethodSymbol meth = (MethodSymbol)sym; // only on methods
1434 final Attribute value = readAttributeValue();
1436 // The default value is set later during annotation. It might
1437 // be the case that the Symbol sym is annotated _after_ the
1438 // repeating instances that depend on this default value,
1439 // because of this we set an interim value that tells us this
1440 // element (most likely) has a default.
1441 //
1442 // Set interim value for now, reset just before we do this
1443 // properly at annotate time.
1444 meth.defaultValue = value;
1445 annotate.normal(new AnnotationDefaultCompleter(meth, value));
1446 }
1448 Type readTypeOrClassSymbol(int i) {
1449 // support preliminary jsr175-format class files
1450 if (buf[poolIdx[i]] == CONSTANT_Class)
1451 return readClassSymbol(i).type;
1452 return readType(i);
1453 }
1454 Type readEnumType(int i) {
1455 // support preliminary jsr175-format class files
1456 int index = poolIdx[i];
1457 int length = getChar(index + 1);
1458 if (buf[index + length + 2] != ';')
1459 return enterClass(readName(i)).type;
1460 return readType(i);
1461 }
1463 CompoundAnnotationProxy readCompoundAnnotation() {
1464 Type t = readTypeOrClassSymbol(nextChar());
1465 int numFields = nextChar();
1466 ListBuffer<Pair<Name,Attribute>> pairs =
1467 new ListBuffer<Pair<Name,Attribute>>();
1468 for (int i=0; i<numFields; i++) {
1469 Name name = readName(nextChar());
1470 Attribute value = readAttributeValue();
1471 pairs.append(new Pair<Name,Attribute>(name, value));
1472 }
1473 return new CompoundAnnotationProxy(t, pairs.toList());
1474 }
1476 TypeAnnotationProxy readTypeAnnotation() {
1477 TypeAnnotationPosition position = readPosition();
1478 CompoundAnnotationProxy proxy = readCompoundAnnotation();
1480 return new TypeAnnotationProxy(proxy, position);
1481 }
1483 TypeAnnotationPosition readPosition() {
1484 int tag = nextByte(); // TargetType tag is a byte
1486 if (!TargetType.isValidTargetTypeValue(tag))
1487 throw this.badClassFile("bad.type.annotation.value", String.format("0x%02X", tag));
1489 TypeAnnotationPosition position = new TypeAnnotationPosition();
1490 TargetType type = TargetType.fromTargetTypeValue(tag);
1492 position.type = type;
1494 switch (type) {
1495 // instanceof
1496 case INSTANCEOF:
1497 // new expression
1498 case NEW:
1499 // constructor/method reference receiver
1500 case CONSTRUCTOR_REFERENCE:
1501 case METHOD_REFERENCE:
1502 position.offset = nextChar();
1503 break;
1504 // local variable
1505 case LOCAL_VARIABLE:
1506 // resource variable
1507 case RESOURCE_VARIABLE:
1508 int table_length = nextChar();
1509 position.lvarOffset = new int[table_length];
1510 position.lvarLength = new int[table_length];
1511 position.lvarIndex = new int[table_length];
1513 for (int i = 0; i < table_length; ++i) {
1514 position.lvarOffset[i] = nextChar();
1515 position.lvarLength[i] = nextChar();
1516 position.lvarIndex[i] = nextChar();
1517 }
1518 break;
1519 // exception parameter
1520 case EXCEPTION_PARAMETER:
1521 position.exception_index = nextByte();
1522 break;
1523 // method receiver
1524 case METHOD_RECEIVER:
1525 // Do nothing
1526 break;
1527 // type parameter
1528 case CLASS_TYPE_PARAMETER:
1529 case METHOD_TYPE_PARAMETER:
1530 position.parameter_index = nextByte();
1531 break;
1532 // type parameter bound
1533 case CLASS_TYPE_PARAMETER_BOUND:
1534 case METHOD_TYPE_PARAMETER_BOUND:
1535 position.parameter_index = nextByte();
1536 position.bound_index = nextByte();
1537 break;
1538 // class extends or implements clause
1539 case CLASS_EXTENDS:
1540 position.type_index = nextChar();
1541 break;
1542 // throws
1543 case THROWS:
1544 position.type_index = nextChar();
1545 break;
1546 // method parameter
1547 case METHOD_FORMAL_PARAMETER:
1548 position.parameter_index = nextByte();
1549 break;
1550 // type cast
1551 case CAST:
1552 // method/constructor/reference type argument
1553 case CONSTRUCTOR_INVOCATION_TYPE_ARGUMENT:
1554 case METHOD_INVOCATION_TYPE_ARGUMENT:
1555 case CONSTRUCTOR_REFERENCE_TYPE_ARGUMENT:
1556 case METHOD_REFERENCE_TYPE_ARGUMENT:
1557 position.offset = nextChar();
1558 position.type_index = nextByte();
1559 break;
1560 // We don't need to worry about these
1561 case METHOD_RETURN:
1562 case FIELD:
1563 break;
1564 case UNKNOWN:
1565 throw new AssertionError("jvm.ClassReader: UNKNOWN target type should never occur!");
1566 default:
1567 throw new AssertionError("jvm.ClassReader: Unknown target type for position: " + position);
1568 }
1570 { // See whether there is location info and read it
1571 int len = nextByte();
1572 ListBuffer<Integer> loc = ListBuffer.lb();
1573 for (int i = 0; i < len * TypeAnnotationPosition.TypePathEntry.bytesPerEntry; ++i)
1574 loc = loc.append(nextByte());
1575 position.location = TypeAnnotationPosition.getTypePathFromBinary(loc.toList());
1576 }
1578 return position;
1579 }
1581 Attribute readAttributeValue() {
1582 char c = (char) buf[bp++];
1583 switch (c) {
1584 case 'B':
1585 return new Attribute.Constant(syms.byteType, readPool(nextChar()));
1586 case 'C':
1587 return new Attribute.Constant(syms.charType, readPool(nextChar()));
1588 case 'D':
1589 return new Attribute.Constant(syms.doubleType, readPool(nextChar()));
1590 case 'F':
1591 return new Attribute.Constant(syms.floatType, readPool(nextChar()));
1592 case 'I':
1593 return new Attribute.Constant(syms.intType, readPool(nextChar()));
1594 case 'J':
1595 return new Attribute.Constant(syms.longType, readPool(nextChar()));
1596 case 'S':
1597 return new Attribute.Constant(syms.shortType, readPool(nextChar()));
1598 case 'Z':
1599 return new Attribute.Constant(syms.booleanType, readPool(nextChar()));
1600 case 's':
1601 return new Attribute.Constant(syms.stringType, readPool(nextChar()).toString());
1602 case 'e':
1603 return new EnumAttributeProxy(readEnumType(nextChar()), readName(nextChar()));
1604 case 'c':
1605 return new Attribute.Class(types, readTypeOrClassSymbol(nextChar()));
1606 case '[': {
1607 int n = nextChar();
1608 ListBuffer<Attribute> l = new ListBuffer<Attribute>();
1609 for (int i=0; i<n; i++)
1610 l.append(readAttributeValue());
1611 return new ArrayAttributeProxy(l.toList());
1612 }
1613 case '@':
1614 return readCompoundAnnotation();
1615 default:
1616 throw new AssertionError("unknown annotation tag '" + c + "'");
1617 }
1618 }
1620 interface ProxyVisitor extends Attribute.Visitor {
1621 void visitEnumAttributeProxy(EnumAttributeProxy proxy);
1622 void visitArrayAttributeProxy(ArrayAttributeProxy proxy);
1623 void visitCompoundAnnotationProxy(CompoundAnnotationProxy proxy);
1624 }
1626 static class EnumAttributeProxy extends Attribute {
1627 Type enumType;
1628 Name enumerator;
1629 public EnumAttributeProxy(Type enumType, Name enumerator) {
1630 super(null);
1631 this.enumType = enumType;
1632 this.enumerator = enumerator;
1633 }
1634 public void accept(Visitor v) { ((ProxyVisitor)v).visitEnumAttributeProxy(this); }
1635 @Override
1636 public String toString() {
1637 return "/*proxy enum*/" + enumType + "." + enumerator;
1638 }
1639 }
1641 static class ArrayAttributeProxy extends Attribute {
1642 List<Attribute> values;
1643 ArrayAttributeProxy(List<Attribute> values) {
1644 super(null);
1645 this.values = values;
1646 }
1647 public void accept(Visitor v) { ((ProxyVisitor)v).visitArrayAttributeProxy(this); }
1648 @Override
1649 public String toString() {
1650 return "{" + values + "}";
1651 }
1652 }
1654 /** A temporary proxy representing a compound attribute.
1655 */
1656 static class CompoundAnnotationProxy extends Attribute {
1657 final List<Pair<Name,Attribute>> values;
1658 public CompoundAnnotationProxy(Type type,
1659 List<Pair<Name,Attribute>> values) {
1660 super(type);
1661 this.values = values;
1662 }
1663 public void accept(Visitor v) { ((ProxyVisitor)v).visitCompoundAnnotationProxy(this); }
1664 @Override
1665 public String toString() {
1666 StringBuilder buf = new StringBuilder();
1667 buf.append("@");
1668 buf.append(type.tsym.getQualifiedName());
1669 buf.append("/*proxy*/{");
1670 boolean first = true;
1671 for (List<Pair<Name,Attribute>> v = values;
1672 v.nonEmpty(); v = v.tail) {
1673 Pair<Name,Attribute> value = v.head;
1674 if (!first) buf.append(",");
1675 first = false;
1676 buf.append(value.fst);
1677 buf.append("=");
1678 buf.append(value.snd);
1679 }
1680 buf.append("}");
1681 return buf.toString();
1682 }
1683 }
1685 /** A temporary proxy representing a type annotation.
1686 */
1687 static class TypeAnnotationProxy {
1688 final CompoundAnnotationProxy compound;
1689 final TypeAnnotationPosition position;
1690 public TypeAnnotationProxy(CompoundAnnotationProxy compound,
1691 TypeAnnotationPosition position) {
1692 this.compound = compound;
1693 this.position = position;
1694 }
1695 }
1697 class AnnotationDeproxy implements ProxyVisitor {
1698 private ClassSymbol requestingOwner = currentOwner.kind == MTH
1699 ? currentOwner.enclClass() : (ClassSymbol)currentOwner;
1701 List<Attribute.Compound> deproxyCompoundList(List<CompoundAnnotationProxy> pl) {
1702 // also must fill in types!!!!
1703 ListBuffer<Attribute.Compound> buf =
1704 new ListBuffer<Attribute.Compound>();
1705 for (List<CompoundAnnotationProxy> l = pl; l.nonEmpty(); l=l.tail) {
1706 buf.append(deproxyCompound(l.head));
1707 }
1708 return buf.toList();
1709 }
1711 Attribute.Compound deproxyCompound(CompoundAnnotationProxy a) {
1712 ListBuffer<Pair<Symbol.MethodSymbol,Attribute>> buf =
1713 new ListBuffer<Pair<Symbol.MethodSymbol,Attribute>>();
1714 for (List<Pair<Name,Attribute>> l = a.values;
1715 l.nonEmpty();
1716 l = l.tail) {
1717 MethodSymbol meth = findAccessMethod(a.type, l.head.fst);
1718 buf.append(new Pair<Symbol.MethodSymbol,Attribute>
1719 (meth, deproxy(meth.type.getReturnType(), l.head.snd)));
1720 }
1721 return new Attribute.Compound(a.type, buf.toList());
1722 }
1724 MethodSymbol findAccessMethod(Type container, Name name) {
1725 CompletionFailure failure = null;
1726 try {
1727 for (Scope.Entry e = container.tsym.members().lookup(name);
1728 e.scope != null;
1729 e = e.next()) {
1730 Symbol sym = e.sym;
1731 if (sym.kind == MTH && sym.type.getParameterTypes().length() == 0)
1732 return (MethodSymbol) sym;
1733 }
1734 } catch (CompletionFailure ex) {
1735 failure = ex;
1736 }
1737 // The method wasn't found: emit a warning and recover
1738 JavaFileObject prevSource = log.useSource(requestingOwner.classfile);
1739 try {
1740 if (failure == null) {
1741 log.warning("annotation.method.not.found",
1742 container,
1743 name);
1744 } else {
1745 log.warning("annotation.method.not.found.reason",
1746 container,
1747 name,
1748 failure.getDetailValue());//diagnostic, if present
1749 }
1750 } finally {
1751 log.useSource(prevSource);
1752 }
1753 // Construct a new method type and symbol. Use bottom
1754 // type (typeof null) as return type because this type is
1755 // a subtype of all reference types and can be converted
1756 // to primitive types by unboxing.
1757 MethodType mt = new MethodType(List.<Type>nil(),
1758 syms.botType,
1759 List.<Type>nil(),
1760 syms.methodClass);
1761 return new MethodSymbol(PUBLIC | ABSTRACT, name, mt, container.tsym);
1762 }
1764 Attribute result;
1765 Type type;
1766 Attribute deproxy(Type t, Attribute a) {
1767 Type oldType = type;
1768 try {
1769 type = t;
1770 a.accept(this);
1771 return result;
1772 } finally {
1773 type = oldType;
1774 }
1775 }
1777 // implement Attribute.Visitor below
1779 public void visitConstant(Attribute.Constant value) {
1780 // assert value.type == type;
1781 result = value;
1782 }
1784 public void visitClass(Attribute.Class clazz) {
1785 result = clazz;
1786 }
1788 public void visitEnum(Attribute.Enum e) {
1789 throw new AssertionError(); // shouldn't happen
1790 }
1792 public void visitCompound(Attribute.Compound compound) {
1793 throw new AssertionError(); // shouldn't happen
1794 }
1796 public void visitArray(Attribute.Array array) {
1797 throw new AssertionError(); // shouldn't happen
1798 }
1800 public void visitError(Attribute.Error e) {
1801 throw new AssertionError(); // shouldn't happen
1802 }
1804 public void visitEnumAttributeProxy(EnumAttributeProxy proxy) {
1805 // type.tsym.flatName() should == proxy.enumFlatName
1806 TypeSymbol enumTypeSym = proxy.enumType.tsym;
1807 VarSymbol enumerator = null;
1808 CompletionFailure failure = null;
1809 try {
1810 for (Scope.Entry e = enumTypeSym.members().lookup(proxy.enumerator);
1811 e.scope != null;
1812 e = e.next()) {
1813 if (e.sym.kind == VAR) {
1814 enumerator = (VarSymbol)e.sym;
1815 break;
1816 }
1817 }
1818 }
1819 catch (CompletionFailure ex) {
1820 failure = ex;
1821 }
1822 if (enumerator == null) {
1823 if (failure != null) {
1824 log.warning("unknown.enum.constant.reason",
1825 currentClassFile, enumTypeSym, proxy.enumerator,
1826 failure.getDiagnostic());
1827 } else {
1828 log.warning("unknown.enum.constant",
1829 currentClassFile, enumTypeSym, proxy.enumerator);
1830 }
1831 result = new Attribute.Enum(enumTypeSym.type,
1832 new VarSymbol(0, proxy.enumerator, syms.botType, enumTypeSym));
1833 } else {
1834 result = new Attribute.Enum(enumTypeSym.type, enumerator);
1835 }
1836 }
1838 public void visitArrayAttributeProxy(ArrayAttributeProxy proxy) {
1839 int length = proxy.values.length();
1840 Attribute[] ats = new Attribute[length];
1841 Type elemtype = types.elemtype(type);
1842 int i = 0;
1843 for (List<Attribute> p = proxy.values; p.nonEmpty(); p = p.tail) {
1844 ats[i++] = deproxy(elemtype, p.head);
1845 }
1846 result = new Attribute.Array(type, ats);
1847 }
1849 public void visitCompoundAnnotationProxy(CompoundAnnotationProxy proxy) {
1850 result = deproxyCompound(proxy);
1851 }
1852 }
1854 class AnnotationDefaultCompleter extends AnnotationDeproxy implements Annotate.Annotator {
1855 final MethodSymbol sym;
1856 final Attribute value;
1857 final JavaFileObject classFile = currentClassFile;
1858 @Override
1859 public String toString() {
1860 return " ClassReader store default for " + sym.owner + "." + sym + " is " + value;
1861 }
1862 AnnotationDefaultCompleter(MethodSymbol sym, Attribute value) {
1863 this.sym = sym;
1864 this.value = value;
1865 }
1866 // implement Annotate.Annotator.enterAnnotation()
1867 public void enterAnnotation() {
1868 JavaFileObject previousClassFile = currentClassFile;
1869 try {
1870 // Reset the interim value set earlier in
1871 // attachAnnotationDefault().
1872 sym.defaultValue = null;
1873 currentClassFile = classFile;
1874 sym.defaultValue = deproxy(sym.type.getReturnType(), value);
1875 } finally {
1876 currentClassFile = previousClassFile;
1877 }
1878 }
1879 }
1881 class AnnotationCompleter extends AnnotationDeproxy implements Annotate.Annotator {
1882 final Symbol sym;
1883 final List<CompoundAnnotationProxy> l;
1884 final JavaFileObject classFile;
1885 @Override
1886 public String toString() {
1887 return " ClassReader annotate " + sym.owner + "." + sym + " with " + l;
1888 }
1889 AnnotationCompleter(Symbol sym, List<CompoundAnnotationProxy> l) {
1890 this.sym = sym;
1891 this.l = l;
1892 this.classFile = currentClassFile;
1893 }
1894 // implement Annotate.Annotator.enterAnnotation()
1895 public void enterAnnotation() {
1896 JavaFileObject previousClassFile = currentClassFile;
1897 try {
1898 currentClassFile = classFile;
1899 Annotations annotations = sym.annotations;
1900 List<Attribute.Compound> newList = deproxyCompoundList(l);
1901 if (annotations.pendingCompletion()) {
1902 annotations.setDeclarationAttributes(newList);
1903 } else {
1904 annotations.append(newList);
1905 }
1906 } finally {
1907 currentClassFile = previousClassFile;
1908 }
1909 }
1910 }
1912 class TypeAnnotationCompleter extends AnnotationCompleter {
1914 List<TypeAnnotationProxy> proxies;
1916 TypeAnnotationCompleter(Symbol sym,
1917 List<TypeAnnotationProxy> proxies) {
1918 super(sym, List.<CompoundAnnotationProxy>nil());
1919 this.proxies = proxies;
1920 }
1922 List<Attribute.TypeCompound> deproxyTypeCompoundList(List<TypeAnnotationProxy> proxies) {
1923 ListBuffer<Attribute.TypeCompound> buf = ListBuffer.lb();
1924 for (TypeAnnotationProxy proxy: proxies) {
1925 Attribute.Compound compound = deproxyCompound(proxy.compound);
1926 Attribute.TypeCompound typeCompound = new Attribute.TypeCompound(compound, proxy.position);
1927 buf.add(typeCompound);
1928 }
1929 return buf.toList();
1930 }
1932 @Override
1933 public void enterAnnotation() {
1934 JavaFileObject previousClassFile = currentClassFile;
1935 try {
1936 currentClassFile = classFile;
1937 List<Attribute.TypeCompound> newList = deproxyTypeCompoundList(proxies);
1938 sym.annotations.setTypeAttributes(newList.prependList(sym.getRawTypeAttributes()));
1939 } finally {
1940 currentClassFile = previousClassFile;
1941 }
1942 }
1943 }
1946 /************************************************************************
1947 * Reading Symbols
1948 ***********************************************************************/
1950 /** Read a field.
1951 */
1952 VarSymbol readField() {
1953 long flags = adjustFieldFlags(nextChar());
1954 Name name = readName(nextChar());
1955 Type type = readType(nextChar());
1956 VarSymbol v = new VarSymbol(flags, name, type, currentOwner);
1957 readMemberAttrs(v);
1958 return v;
1959 }
1961 /** Read a method.
1962 */
1963 MethodSymbol readMethod() {
1964 long flags = adjustMethodFlags(nextChar());
1965 Name name = readName(nextChar());
1966 Type type = readType(nextChar());
1967 if (currentOwner.isInterface() &&
1968 (flags & ABSTRACT) == 0 && !name.equals(names.clinit)) {
1969 if (majorVersion > Target.JDK1_8.majorVersion ||
1970 (majorVersion == Target.JDK1_8.majorVersion && minorVersion >= Target.JDK1_8.minorVersion)) {
1971 currentOwner.flags_field |= DEFAULT;
1972 flags |= DEFAULT | ABSTRACT;
1973 } else {
1974 //protect against ill-formed classfiles
1975 throw new CompletionFailure(currentOwner, "default method found in pre JDK 8 classfile");
1976 }
1977 }
1978 if (name == names.init && currentOwner.hasOuterInstance()) {
1979 // Sometimes anonymous classes don't have an outer
1980 // instance, however, there is no reliable way to tell so
1981 // we never strip this$n
1982 if (!currentOwner.name.isEmpty())
1983 type = new MethodType(adjustMethodParams(flags, type.getParameterTypes()),
1984 type.getReturnType(),
1985 type.getThrownTypes(),
1986 syms.methodClass);
1987 }
1988 MethodSymbol m = new MethodSymbol(flags, name, type, currentOwner);
1989 if (saveParameterNames)
1990 initParameterNames(m);
1991 Symbol prevOwner = currentOwner;
1992 currentOwner = m;
1993 try {
1994 readMemberAttrs(m);
1995 } finally {
1996 currentOwner = prevOwner;
1997 }
1998 if (saveParameterNames)
1999 setParameterNames(m, type);
2000 return m;
2001 }
2003 private List<Type> adjustMethodParams(long flags, List<Type> args) {
2004 boolean isVarargs = (flags & VARARGS) != 0;
2005 if (isVarargs) {
2006 Type varargsElem = args.last();
2007 ListBuffer<Type> adjustedArgs = ListBuffer.lb();
2008 for (Type t : args) {
2009 adjustedArgs.append(t != varargsElem ?
2010 t :
2011 ((ArrayType)t).makeVarargs());
2012 }
2013 args = adjustedArgs.toList();
2014 }
2015 return args.tail;
2016 }
2018 /**
2019 * Init the parameter names array.
2020 * Parameter names are currently inferred from the names in the
2021 * LocalVariableTable attributes of a Code attribute.
2022 * (Note: this means parameter names are currently not available for
2023 * methods without a Code attribute.)
2024 * This method initializes an array in which to store the name indexes
2025 * of parameter names found in LocalVariableTable attributes. It is
2026 * slightly supersized to allow for additional slots with a start_pc of 0.
2027 */
2028 void initParameterNames(MethodSymbol sym) {
2029 // make allowance for synthetic parameters.
2030 final int excessSlots = 4;
2031 int expectedParameterSlots =
2032 Code.width(sym.type.getParameterTypes()) + excessSlots;
2033 if (parameterNameIndices == null
2034 || parameterNameIndices.length < expectedParameterSlots) {
2035 parameterNameIndices = new int[expectedParameterSlots];
2036 } else
2037 Arrays.fill(parameterNameIndices, 0);
2038 haveParameterNameIndices = false;
2039 sawMethodParameters = false;
2040 }
2042 /**
2043 * Set the parameter names for a symbol from the name index in the
2044 * parameterNameIndicies array. The type of the symbol may have changed
2045 * while reading the method attributes (see the Signature attribute).
2046 * This may be because of generic information or because anonymous
2047 * synthetic parameters were added. The original type (as read from
2048 * the method descriptor) is used to help guess the existence of
2049 * anonymous synthetic parameters.
2050 * On completion, sym.savedParameter names will either be null (if
2051 * no parameter names were found in the class file) or will be set to a
2052 * list of names, one per entry in sym.type.getParameterTypes, with
2053 * any missing names represented by the empty name.
2054 */
2055 void setParameterNames(MethodSymbol sym, Type jvmType) {
2056 // if no names were found in the class file, there's nothing more to do
2057 if (!haveParameterNameIndices)
2058 return;
2059 // If we get parameter names from MethodParameters, then we
2060 // don't need to skip.
2061 int firstParam = 0;
2062 if (!sawMethodParameters) {
2063 firstParam = ((sym.flags() & STATIC) == 0) ? 1 : 0;
2064 // the code in readMethod may have skipped the first
2065 // parameter when setting up the MethodType. If so, we
2066 // make a corresponding allowance here for the position of
2067 // the first parameter. Note that this assumes the
2068 // skipped parameter has a width of 1 -- i.e. it is not
2069 // a double width type (long or double.)
2070 if (sym.name == names.init && currentOwner.hasOuterInstance()) {
2071 // Sometimes anonymous classes don't have an outer
2072 // instance, however, there is no reliable way to tell so
2073 // we never strip this$n
2074 if (!currentOwner.name.isEmpty())
2075 firstParam += 1;
2076 }
2078 if (sym.type != jvmType) {
2079 // reading the method attributes has caused the
2080 // symbol's type to be changed. (i.e. the Signature
2081 // attribute.) This may happen if there are hidden
2082 // (synthetic) parameters in the descriptor, but not
2083 // in the Signature. The position of these hidden
2084 // parameters is unspecified; for now, assume they are
2085 // at the beginning, and so skip over them. The
2086 // primary case for this is two hidden parameters
2087 // passed into Enum constructors.
2088 int skip = Code.width(jvmType.getParameterTypes())
2089 - Code.width(sym.type.getParameterTypes());
2090 firstParam += skip;
2091 }
2092 }
2093 List<Name> paramNames = List.nil();
2094 int index = firstParam;
2095 for (Type t: sym.type.getParameterTypes()) {
2096 int nameIdx = (index < parameterNameIndices.length
2097 ? parameterNameIndices[index] : 0);
2098 Name name = nameIdx == 0 ? names.empty : readName(nameIdx);
2099 paramNames = paramNames.prepend(name);
2100 index += Code.width(t);
2101 }
2102 sym.savedParameterNames = paramNames.reverse();
2103 }
2105 /**
2106 * skip n bytes
2107 */
2108 void skipBytes(int n) {
2109 bp = bp + n;
2110 }
2112 /** Skip a field or method
2113 */
2114 void skipMember() {
2115 bp = bp + 6;
2116 char ac = nextChar();
2117 for (int i = 0; i < ac; i++) {
2118 bp = bp + 2;
2119 int attrLen = nextInt();
2120 bp = bp + attrLen;
2121 }
2122 }
2124 /** Enter type variables of this classtype and all enclosing ones in
2125 * `typevars'.
2126 */
2127 protected void enterTypevars(Type t) {
2128 if (t.getEnclosingType() != null && t.getEnclosingType().hasTag(CLASS))
2129 enterTypevars(t.getEnclosingType());
2130 for (List<Type> xs = t.getTypeArguments(); xs.nonEmpty(); xs = xs.tail)
2131 typevars.enter(xs.head.tsym);
2132 }
2134 protected void enterTypevars(Symbol sym) {
2135 if (sym.owner.kind == MTH) {
2136 enterTypevars(sym.owner);
2137 enterTypevars(sym.owner.owner);
2138 }
2139 enterTypevars(sym.type);
2140 }
2142 /** Read contents of a given class symbol `c'. Both external and internal
2143 * versions of an inner class are read.
2144 */
2145 void readClass(ClassSymbol c) {
2146 ClassType ct = (ClassType)c.type;
2148 // allocate scope for members
2149 c.members_field = new Scope(c);
2151 // prepare type variable table
2152 typevars = typevars.dup(currentOwner);
2153 if (ct.getEnclosingType().hasTag(CLASS))
2154 enterTypevars(ct.getEnclosingType());
2156 // read flags, or skip if this is an inner class
2157 long flags = adjustClassFlags(nextChar());
2158 if (c.owner.kind == PCK) c.flags_field = flags;
2160 // read own class name and check that it matches
2161 ClassSymbol self = readClassSymbol(nextChar());
2162 if (c != self)
2163 throw badClassFile("class.file.wrong.class",
2164 self.flatname);
2166 // class attributes must be read before class
2167 // skip ahead to read class attributes
2168 int startbp = bp;
2169 nextChar();
2170 char interfaceCount = nextChar();
2171 bp += interfaceCount * 2;
2172 char fieldCount = nextChar();
2173 for (int i = 0; i < fieldCount; i++) skipMember();
2174 char methodCount = nextChar();
2175 for (int i = 0; i < methodCount; i++) skipMember();
2176 readClassAttrs(c);
2178 if (readAllOfClassFile) {
2179 for (int i = 1; i < poolObj.length; i++) readPool(i);
2180 c.pool = new Pool(poolObj.length, poolObj, types);
2181 }
2183 // reset and read rest of classinfo
2184 bp = startbp;
2185 int n = nextChar();
2186 if (ct.supertype_field == null)
2187 ct.supertype_field = (n == 0)
2188 ? Type.noType
2189 : readClassSymbol(n).erasure(types);
2190 n = nextChar();
2191 List<Type> is = List.nil();
2192 for (int i = 0; i < n; i++) {
2193 Type _inter = readClassSymbol(nextChar()).erasure(types);
2194 is = is.prepend(_inter);
2195 }
2196 if (ct.interfaces_field == null)
2197 ct.interfaces_field = is.reverse();
2199 Assert.check(fieldCount == nextChar());
2200 for (int i = 0; i < fieldCount; i++) enterMember(c, readField());
2201 Assert.check(methodCount == nextChar());
2202 for (int i = 0; i < methodCount; i++) enterMember(c, readMethod());
2204 typevars = typevars.leave();
2205 }
2207 /** Read inner class info. For each inner/outer pair allocate a
2208 * member class.
2209 */
2210 void readInnerClasses(ClassSymbol c) {
2211 int n = nextChar();
2212 for (int i = 0; i < n; i++) {
2213 nextChar(); // skip inner class symbol
2214 ClassSymbol outer = readClassSymbol(nextChar());
2215 Name name = readName(nextChar());
2216 if (name == null) name = names.empty;
2217 long flags = adjustClassFlags(nextChar());
2218 if (outer != null) { // we have a member class
2219 if (name == names.empty)
2220 name = names.one;
2221 ClassSymbol member = enterClass(name, outer);
2222 if ((flags & STATIC) == 0) {
2223 ((ClassType)member.type).setEnclosingType(outer.type);
2224 if (member.erasure_field != null)
2225 ((ClassType)member.erasure_field).setEnclosingType(types.erasure(outer.type));
2226 }
2227 if (c == outer) {
2228 member.flags_field = flags;
2229 enterMember(c, member);
2230 }
2231 }
2232 }
2233 }
2235 /** Read a class file.
2236 */
2237 private void readClassFile(ClassSymbol c) throws IOException {
2238 int magic = nextInt();
2239 if (magic != JAVA_MAGIC)
2240 throw badClassFile("illegal.start.of.class.file");
2242 minorVersion = nextChar();
2243 majorVersion = nextChar();
2244 int maxMajor = Target.MAX().majorVersion;
2245 int maxMinor = Target.MAX().minorVersion;
2246 if (majorVersion > maxMajor ||
2247 majorVersion * 1000 + minorVersion <
2248 Target.MIN().majorVersion * 1000 + Target.MIN().minorVersion)
2249 {
2250 if (majorVersion == (maxMajor + 1))
2251 log.warning("big.major.version",
2252 currentClassFile,
2253 majorVersion,
2254 maxMajor);
2255 else
2256 throw badClassFile("wrong.version",
2257 Integer.toString(majorVersion),
2258 Integer.toString(minorVersion),
2259 Integer.toString(maxMajor),
2260 Integer.toString(maxMinor));
2261 }
2262 else if (checkClassFile &&
2263 majorVersion == maxMajor &&
2264 minorVersion > maxMinor)
2265 {
2266 printCCF("found.later.version",
2267 Integer.toString(minorVersion));
2268 }
2269 indexPool();
2270 if (signatureBuffer.length < bp) {
2271 int ns = Integer.highestOneBit(bp) << 1;
2272 signatureBuffer = new byte[ns];
2273 }
2274 readClass(c);
2275 }
2277 /************************************************************************
2278 * Adjusting flags
2279 ***********************************************************************/
2281 long adjustFieldFlags(long flags) {
2282 return flags;
2283 }
2284 long adjustMethodFlags(long flags) {
2285 if ((flags & ACC_BRIDGE) != 0) {
2286 flags &= ~ACC_BRIDGE;
2287 flags |= BRIDGE;
2288 if (!allowGenerics)
2289 flags &= ~SYNTHETIC;
2290 }
2291 if ((flags & ACC_VARARGS) != 0) {
2292 flags &= ~ACC_VARARGS;
2293 flags |= VARARGS;
2294 }
2295 return flags;
2296 }
2297 long adjustClassFlags(long flags) {
2298 return flags & ~ACC_SUPER; // SUPER and SYNCHRONIZED bits overloaded
2299 }
2301 /************************************************************************
2302 * Loading Classes
2303 ***********************************************************************/
2305 /** Define a new class given its name and owner.
2306 */
2307 public ClassSymbol defineClass(Name name, Symbol owner) {
2308 ClassSymbol c = new ClassSymbol(0, name, owner);
2309 if (owner.kind == PCK)
2310 Assert.checkNull(classes.get(c.flatname), c);
2311 c.completer = this;
2312 return c;
2313 }
2315 /** Create a new toplevel or member class symbol with given name
2316 * and owner and enter in `classes' unless already there.
2317 */
2318 public ClassSymbol enterClass(Name name, TypeSymbol owner) {
2319 Name flatname = TypeSymbol.formFlatName(name, owner);
2320 ClassSymbol c = classes.get(flatname);
2321 if (c == null) {
2322 c = defineClass(name, owner);
2323 classes.put(flatname, c);
2324 } else if ((c.name != name || c.owner != owner) && owner.kind == TYP && c.owner.kind == PCK) {
2325 // reassign fields of classes that might have been loaded with
2326 // their flat names.
2327 c.owner.members().remove(c);
2328 c.name = name;
2329 c.owner = owner;
2330 c.fullname = ClassSymbol.formFullName(name, owner);
2331 }
2332 return c;
2333 }
2335 /**
2336 * Creates a new toplevel class symbol with given flat name and
2337 * given class (or source) file.
2338 *
2339 * @param flatName a fully qualified binary class name
2340 * @param classFile the class file or compilation unit defining
2341 * the class (may be {@code null})
2342 * @return a newly created class symbol
2343 * @throws AssertionError if the class symbol already exists
2344 */
2345 public ClassSymbol enterClass(Name flatName, JavaFileObject classFile) {
2346 ClassSymbol cs = classes.get(flatName);
2347 if (cs != null) {
2348 String msg = Log.format("%s: completer = %s; class file = %s; source file = %s",
2349 cs.fullname,
2350 cs.completer,
2351 cs.classfile,
2352 cs.sourcefile);
2353 throw new AssertionError(msg);
2354 }
2355 Name packageName = Convert.packagePart(flatName);
2356 PackageSymbol owner = packageName.isEmpty()
2357 ? syms.unnamedPackage
2358 : enterPackage(packageName);
2359 cs = defineClass(Convert.shortName(flatName), owner);
2360 cs.classfile = classFile;
2361 classes.put(flatName, cs);
2362 return cs;
2363 }
2365 /** Create a new member or toplevel class symbol with given flat name
2366 * and enter in `classes' unless already there.
2367 */
2368 public ClassSymbol enterClass(Name flatname) {
2369 ClassSymbol c = classes.get(flatname);
2370 if (c == null)
2371 return enterClass(flatname, (JavaFileObject)null);
2372 else
2373 return c;
2374 }
2376 private boolean suppressFlush = false;
2378 /** Completion for classes to be loaded. Before a class is loaded
2379 * we make sure its enclosing class (if any) is loaded.
2380 */
2381 public void complete(Symbol sym) throws CompletionFailure {
2382 if (sym.kind == TYP) {
2383 ClassSymbol c = (ClassSymbol)sym;
2384 c.members_field = new Scope.ErrorScope(c); // make sure it's always defined
2385 boolean saveSuppressFlush = suppressFlush;
2386 suppressFlush = true;
2387 try {
2388 completeOwners(c.owner);
2389 completeEnclosing(c);
2390 } finally {
2391 suppressFlush = saveSuppressFlush;
2392 }
2393 fillIn(c);
2394 } else if (sym.kind == PCK) {
2395 PackageSymbol p = (PackageSymbol)sym;
2396 try {
2397 fillIn(p);
2398 } catch (IOException ex) {
2399 throw new CompletionFailure(sym, ex.getLocalizedMessage()).initCause(ex);
2400 }
2401 }
2402 if (!filling && !suppressFlush)
2403 annotate.flush(); // finish attaching annotations
2404 }
2406 /** complete up through the enclosing package. */
2407 private void completeOwners(Symbol o) {
2408 if (o.kind != PCK) completeOwners(o.owner);
2409 o.complete();
2410 }
2412 /**
2413 * Tries to complete lexically enclosing classes if c looks like a
2414 * nested class. This is similar to completeOwners but handles
2415 * the situation when a nested class is accessed directly as it is
2416 * possible with the Tree API or javax.lang.model.*.
2417 */
2418 private void completeEnclosing(ClassSymbol c) {
2419 if (c.owner.kind == PCK) {
2420 Symbol owner = c.owner;
2421 for (Name name : Convert.enclosingCandidates(Convert.shortName(c.name))) {
2422 Symbol encl = owner.members().lookup(name).sym;
2423 if (encl == null)
2424 encl = classes.get(TypeSymbol.formFlatName(name, owner));
2425 if (encl != null)
2426 encl.complete();
2427 }
2428 }
2429 }
2431 /** We can only read a single class file at a time; this
2432 * flag keeps track of when we are currently reading a class
2433 * file.
2434 */
2435 private boolean filling = false;
2437 /** Fill in definition of class `c' from corresponding class or
2438 * source file.
2439 */
2440 private void fillIn(ClassSymbol c) {
2441 if (completionFailureName == c.fullname) {
2442 throw new CompletionFailure(c, "user-selected completion failure by class name");
2443 }
2444 currentOwner = c;
2445 warnedAttrs.clear();
2446 JavaFileObject classfile = c.classfile;
2447 if (classfile != null) {
2448 JavaFileObject previousClassFile = currentClassFile;
2449 try {
2450 if (filling) {
2451 Assert.error("Filling " + classfile.toUri() + " during " + previousClassFile);
2452 }
2453 currentClassFile = classfile;
2454 if (verbose) {
2455 log.printVerbose("loading", currentClassFile.toString());
2456 }
2457 if (classfile.getKind() == JavaFileObject.Kind.CLASS) {
2458 filling = true;
2459 try {
2460 bp = 0;
2461 buf = readInputStream(buf, classfile.openInputStream());
2462 readClassFile(c);
2463 if (!missingTypeVariables.isEmpty() && !foundTypeVariables.isEmpty()) {
2464 List<Type> missing = missingTypeVariables;
2465 List<Type> found = foundTypeVariables;
2466 missingTypeVariables = List.nil();
2467 foundTypeVariables = List.nil();
2468 filling = false;
2469 ClassType ct = (ClassType)currentOwner.type;
2470 ct.supertype_field =
2471 types.subst(ct.supertype_field, missing, found);
2472 ct.interfaces_field =
2473 types.subst(ct.interfaces_field, missing, found);
2474 } else if (missingTypeVariables.isEmpty() !=
2475 foundTypeVariables.isEmpty()) {
2476 Name name = missingTypeVariables.head.tsym.name;
2477 throw badClassFile("undecl.type.var", name);
2478 }
2479 } finally {
2480 missingTypeVariables = List.nil();
2481 foundTypeVariables = List.nil();
2482 filling = false;
2483 }
2484 } else {
2485 if (sourceCompleter != null) {
2486 sourceCompleter.complete(c);
2487 } else {
2488 throw new IllegalStateException("Source completer required to read "
2489 + classfile.toUri());
2490 }
2491 }
2492 return;
2493 } catch (IOException ex) {
2494 throw badClassFile("unable.to.access.file", ex.getMessage());
2495 } finally {
2496 currentClassFile = previousClassFile;
2497 }
2498 } else {
2499 JCDiagnostic diag =
2500 diagFactory.fragment("class.file.not.found", c.flatname);
2501 throw
2502 newCompletionFailure(c, diag);
2503 }
2504 }
2505 // where
2506 private static byte[] readInputStream(byte[] buf, InputStream s) throws IOException {
2507 try {
2508 buf = ensureCapacity(buf, s.available());
2509 int r = s.read(buf);
2510 int bp = 0;
2511 while (r != -1) {
2512 bp += r;
2513 buf = ensureCapacity(buf, bp);
2514 r = s.read(buf, bp, buf.length - bp);
2515 }
2516 return buf;
2517 } finally {
2518 try {
2519 s.close();
2520 } catch (IOException e) {
2521 /* Ignore any errors, as this stream may have already
2522 * thrown a related exception which is the one that
2523 * should be reported.
2524 */
2525 }
2526 }
2527 }
2528 /*
2529 * ensureCapacity will increase the buffer as needed, taking note that
2530 * the new buffer will always be greater than the needed and never
2531 * exactly equal to the needed size or bp. If equal then the read (above)
2532 * will infinitely loop as buf.length - bp == 0.
2533 */
2534 private static byte[] ensureCapacity(byte[] buf, int needed) {
2535 if (buf.length <= needed) {
2536 byte[] old = buf;
2537 buf = new byte[Integer.highestOneBit(needed) << 1];
2538 System.arraycopy(old, 0, buf, 0, old.length);
2539 }
2540 return buf;
2541 }
2542 /** Static factory for CompletionFailure objects.
2543 * In practice, only one can be used at a time, so we share one
2544 * to reduce the expense of allocating new exception objects.
2545 */
2546 private CompletionFailure newCompletionFailure(TypeSymbol c,
2547 JCDiagnostic diag) {
2548 if (!cacheCompletionFailure) {
2549 // log.warning("proc.messager",
2550 // Log.getLocalizedString("class.file.not.found", c.flatname));
2551 // c.debug.printStackTrace();
2552 return new CompletionFailure(c, diag);
2553 } else {
2554 CompletionFailure result = cachedCompletionFailure;
2555 result.sym = c;
2556 result.diag = diag;
2557 return result;
2558 }
2559 }
2560 private CompletionFailure cachedCompletionFailure =
2561 new CompletionFailure(null, (JCDiagnostic) null);
2562 {
2563 cachedCompletionFailure.setStackTrace(new StackTraceElement[0]);
2564 }
2566 /** Load a toplevel class with given fully qualified name
2567 * The class is entered into `classes' only if load was successful.
2568 */
2569 public ClassSymbol loadClass(Name flatname) throws CompletionFailure {
2570 boolean absent = classes.get(flatname) == null;
2571 ClassSymbol c = enterClass(flatname);
2572 if (c.members_field == null && c.completer != null) {
2573 try {
2574 c.complete();
2575 } catch (CompletionFailure ex) {
2576 if (absent) classes.remove(flatname);
2577 throw ex;
2578 }
2579 }
2580 return c;
2581 }
2583 /************************************************************************
2584 * Loading Packages
2585 ***********************************************************************/
2587 /** Check to see if a package exists, given its fully qualified name.
2588 */
2589 public boolean packageExists(Name fullname) {
2590 return enterPackage(fullname).exists();
2591 }
2593 /** Make a package, given its fully qualified name.
2594 */
2595 public PackageSymbol enterPackage(Name fullname) {
2596 PackageSymbol p = packages.get(fullname);
2597 if (p == null) {
2598 Assert.check(!fullname.isEmpty(), "rootPackage missing!");
2599 p = new PackageSymbol(
2600 Convert.shortName(fullname),
2601 enterPackage(Convert.packagePart(fullname)));
2602 p.completer = this;
2603 packages.put(fullname, p);
2604 }
2605 return p;
2606 }
2608 /** Make a package, given its unqualified name and enclosing package.
2609 */
2610 public PackageSymbol enterPackage(Name name, PackageSymbol owner) {
2611 return enterPackage(TypeSymbol.formFullName(name, owner));
2612 }
2614 /** Include class corresponding to given class file in package,
2615 * unless (1) we already have one the same kind (.class or .java), or
2616 * (2) we have one of the other kind, and the given class file
2617 * is older.
2618 */
2619 protected void includeClassFile(PackageSymbol p, JavaFileObject file) {
2620 if ((p.flags_field & EXISTS) == 0)
2621 for (Symbol q = p; q != null && q.kind == PCK; q = q.owner)
2622 q.flags_field |= EXISTS;
2623 JavaFileObject.Kind kind = file.getKind();
2624 int seen;
2625 if (kind == JavaFileObject.Kind.CLASS)
2626 seen = CLASS_SEEN;
2627 else
2628 seen = SOURCE_SEEN;
2629 String binaryName = fileManager.inferBinaryName(currentLoc, file);
2630 int lastDot = binaryName.lastIndexOf(".");
2631 Name classname = names.fromString(binaryName.substring(lastDot + 1));
2632 boolean isPkgInfo = classname == names.package_info;
2633 ClassSymbol c = isPkgInfo
2634 ? p.package_info
2635 : (ClassSymbol) p.members_field.lookup(classname).sym;
2636 if (c == null) {
2637 c = enterClass(classname, p);
2638 if (c.classfile == null) // only update the file if's it's newly created
2639 c.classfile = file;
2640 if (isPkgInfo) {
2641 p.package_info = c;
2642 } else {
2643 if (c.owner == p) // it might be an inner class
2644 p.members_field.enter(c);
2645 }
2646 } else if (c.classfile != null && (c.flags_field & seen) == 0) {
2647 // if c.classfile == null, we are currently compiling this class
2648 // and no further action is necessary.
2649 // if (c.flags_field & seen) != 0, we have already encountered
2650 // a file of the same kind; again no further action is necessary.
2651 if ((c.flags_field & (CLASS_SEEN | SOURCE_SEEN)) != 0)
2652 c.classfile = preferredFileObject(file, c.classfile);
2653 }
2654 c.flags_field |= seen;
2655 }
2657 /** Implement policy to choose to derive information from a source
2658 * file or a class file when both are present. May be overridden
2659 * by subclasses.
2660 */
2661 protected JavaFileObject preferredFileObject(JavaFileObject a,
2662 JavaFileObject b) {
2664 if (preferSource)
2665 return (a.getKind() == JavaFileObject.Kind.SOURCE) ? a : b;
2666 else {
2667 long adate = a.getLastModified();
2668 long bdate = b.getLastModified();
2669 // 6449326: policy for bad lastModifiedTime in ClassReader
2670 //assert adate >= 0 && bdate >= 0;
2671 return (adate > bdate) ? a : b;
2672 }
2673 }
2675 /**
2676 * specifies types of files to be read when filling in a package symbol
2677 */
2678 protected EnumSet<JavaFileObject.Kind> getPackageFileKinds() {
2679 return EnumSet.of(JavaFileObject.Kind.CLASS, JavaFileObject.Kind.SOURCE);
2680 }
2682 /**
2683 * this is used to support javadoc
2684 */
2685 protected void extraFileActions(PackageSymbol pack, JavaFileObject fe) {
2686 }
2688 protected Location currentLoc; // FIXME
2690 private boolean verbosePath = true;
2692 /** Load directory of package into members scope.
2693 */
2694 private void fillIn(PackageSymbol p) throws IOException {
2695 if (p.members_field == null) p.members_field = new Scope(p);
2696 String packageName = p.fullname.toString();
2698 Set<JavaFileObject.Kind> kinds = getPackageFileKinds();
2700 fillIn(p, PLATFORM_CLASS_PATH,
2701 fileManager.list(PLATFORM_CLASS_PATH,
2702 packageName,
2703 EnumSet.of(JavaFileObject.Kind.CLASS),
2704 false));
2706 Set<JavaFileObject.Kind> classKinds = EnumSet.copyOf(kinds);
2707 classKinds.remove(JavaFileObject.Kind.SOURCE);
2708 boolean wantClassFiles = !classKinds.isEmpty();
2710 Set<JavaFileObject.Kind> sourceKinds = EnumSet.copyOf(kinds);
2711 sourceKinds.remove(JavaFileObject.Kind.CLASS);
2712 boolean wantSourceFiles = !sourceKinds.isEmpty();
2714 boolean haveSourcePath = fileManager.hasLocation(SOURCE_PATH);
2716 if (verbose && verbosePath) {
2717 if (fileManager instanceof StandardJavaFileManager) {
2718 StandardJavaFileManager fm = (StandardJavaFileManager)fileManager;
2719 if (haveSourcePath && wantSourceFiles) {
2720 List<File> path = List.nil();
2721 for (File file : fm.getLocation(SOURCE_PATH)) {
2722 path = path.prepend(file);
2723 }
2724 log.printVerbose("sourcepath", path.reverse().toString());
2725 } else if (wantSourceFiles) {
2726 List<File> path = List.nil();
2727 for (File file : fm.getLocation(CLASS_PATH)) {
2728 path = path.prepend(file);
2729 }
2730 log.printVerbose("sourcepath", path.reverse().toString());
2731 }
2732 if (wantClassFiles) {
2733 List<File> path = List.nil();
2734 for (File file : fm.getLocation(PLATFORM_CLASS_PATH)) {
2735 path = path.prepend(file);
2736 }
2737 for (File file : fm.getLocation(CLASS_PATH)) {
2738 path = path.prepend(file);
2739 }
2740 log.printVerbose("classpath", path.reverse().toString());
2741 }
2742 }
2743 }
2745 if (wantSourceFiles && !haveSourcePath) {
2746 fillIn(p, CLASS_PATH,
2747 fileManager.list(CLASS_PATH,
2748 packageName,
2749 kinds,
2750 false));
2751 } else {
2752 if (wantClassFiles)
2753 fillIn(p, CLASS_PATH,
2754 fileManager.list(CLASS_PATH,
2755 packageName,
2756 classKinds,
2757 false));
2758 if (wantSourceFiles)
2759 fillIn(p, SOURCE_PATH,
2760 fileManager.list(SOURCE_PATH,
2761 packageName,
2762 sourceKinds,
2763 false));
2764 }
2765 verbosePath = false;
2766 }
2767 // where
2768 private void fillIn(PackageSymbol p,
2769 Location location,
2770 Iterable<JavaFileObject> files)
2771 {
2772 currentLoc = location;
2773 for (JavaFileObject fo : files) {
2774 switch (fo.getKind()) {
2775 case CLASS:
2776 case SOURCE: {
2777 // TODO pass binaryName to includeClassFile
2778 String binaryName = fileManager.inferBinaryName(currentLoc, fo);
2779 String simpleName = binaryName.substring(binaryName.lastIndexOf(".") + 1);
2780 if (SourceVersion.isIdentifier(simpleName) ||
2781 simpleName.equals("package-info"))
2782 includeClassFile(p, fo);
2783 break;
2784 }
2785 default:
2786 extraFileActions(p, fo);
2787 }
2788 }
2789 }
2791 /** Output for "-checkclassfile" option.
2792 * @param key The key to look up the correct internationalized string.
2793 * @param arg An argument for substitution into the output string.
2794 */
2795 private void printCCF(String key, Object arg) {
2796 log.printLines(key, arg);
2797 }
2800 public interface SourceCompleter {
2801 void complete(ClassSymbol sym)
2802 throws CompletionFailure;
2803 }
2805 /**
2806 * A subclass of JavaFileObject for the sourcefile attribute found in a classfile.
2807 * The attribute is only the last component of the original filename, so is unlikely
2808 * to be valid as is, so operations other than those to access the name throw
2809 * UnsupportedOperationException
2810 */
2811 private static class SourceFileObject extends BaseFileObject {
2813 /** The file's name.
2814 */
2815 private Name name;
2816 private Name flatname;
2818 public SourceFileObject(Name name, Name flatname) {
2819 super(null); // no file manager; never referenced for this file object
2820 this.name = name;
2821 this.flatname = flatname;
2822 }
2824 @Override
2825 public URI toUri() {
2826 try {
2827 return new URI(null, name.toString(), null);
2828 } catch (URISyntaxException e) {
2829 throw new CannotCreateUriError(name.toString(), e);
2830 }
2831 }
2833 @Override
2834 public String getName() {
2835 return name.toString();
2836 }
2838 @Override
2839 public String getShortName() {
2840 return getName();
2841 }
2843 @Override
2844 public JavaFileObject.Kind getKind() {
2845 return getKind(getName());
2846 }
2848 @Override
2849 public InputStream openInputStream() {
2850 throw new UnsupportedOperationException();
2851 }
2853 @Override
2854 public OutputStream openOutputStream() {
2855 throw new UnsupportedOperationException();
2856 }
2858 @Override
2859 public CharBuffer getCharContent(boolean ignoreEncodingErrors) {
2860 throw new UnsupportedOperationException();
2861 }
2863 @Override
2864 public Reader openReader(boolean ignoreEncodingErrors) {
2865 throw new UnsupportedOperationException();
2866 }
2868 @Override
2869 public Writer openWriter() {
2870 throw new UnsupportedOperationException();
2871 }
2873 @Override
2874 public long getLastModified() {
2875 throw new UnsupportedOperationException();
2876 }
2878 @Override
2879 public boolean delete() {
2880 throw new UnsupportedOperationException();
2881 }
2883 @Override
2884 protected String inferBinaryName(Iterable<? extends File> path) {
2885 return flatname.toString();
2886 }
2888 @Override
2889 public boolean isNameCompatible(String simpleName, JavaFileObject.Kind kind) {
2890 return true; // fail-safe mode
2891 }
2893 /**
2894 * Check if two file objects are equal.
2895 * SourceFileObjects are just placeholder objects for the value of a
2896 * SourceFile attribute, and do not directly represent specific files.
2897 * Two SourceFileObjects are equal if their names are equal.
2898 */
2899 @Override
2900 public boolean equals(Object other) {
2901 if (this == other)
2902 return true;
2904 if (!(other instanceof SourceFileObject))
2905 return false;
2907 SourceFileObject o = (SourceFileObject) other;
2908 return name.equals(o.name);
2909 }
2911 @Override
2912 public int hashCode() {
2913 return name.hashCode();
2914 }
2915 }
2916 }
