1 /*
2 * Copyright (c) 1999, 2014, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package com.sun.tools.javac.jvm;
27
28 import java.io.*;
29 import java.net.URI;
30 import java.net.URISyntaxException;
31 import java.nio.CharBuffer;
32 import java.util.Arrays;
33 import java.util.EnumSet;
34 import java.util.HashMap;
35 import java.util.HashSet;
36 import java.util.Map;
37 import java.util.Set;
38 import javax.lang.model.SourceVersion;
39 import javax.tools.JavaFileObject;
40 import javax.tools.JavaFileManager;
41 import javax.tools.JavaFileManager.Location;
42 import javax.tools.StandardJavaFileManager;
43
44 import static javax.tools.StandardLocation.*;
45
46 import com.sun.tools.javac.comp.Annotate;
47 import com.sun.tools.javac.code.*;
48 import com.sun.tools.javac.code.Lint.LintCategory;
49 import com.sun.tools.javac.code.Type.*;
50 import com.sun.tools.javac.code.Symbol.*;
51 import com.sun.tools.javac.code.Symtab;
52 import com.sun.tools.javac.file.BaseFileObject;
53 import com.sun.tools.javac.util.*;
54 import com.sun.tools.javac.util.JCDiagnostic.DiagnosticPosition;
55
56 import static com.sun.tools.javac.code.Flags.*;
57 import static com.sun.tools.javac.code.Kinds.*;
58 import static com.sun.tools.javac.code.TypeTag.CLASS;
59 import static com.sun.tools.javac.code.TypeTag.TYPEVAR;
60 import static com.sun.tools.javac.jvm.ClassFile.*;
61 import static com.sun.tools.javac.jvm.ClassFile.Version.*;
62
63 import static com.sun.tools.javac.main.Option.*;
64
65 /** This class provides operations to read a classfile into an internal
66 * representation. The internal representation is anchored in a
67 * ClassSymbol which contains in its scope symbol representations
68 * for all other definitions in the classfile. Top-level Classes themselves
69 * appear as members of the scopes of PackageSymbols.
70 *
71 * <p><b>This is NOT part of any supported API.
72 * If you write code that depends on this, you do so at your own risk.
73 * This code and its internal interfaces are subject to change or
74 * deletion without notice.</b>
75 */
76 public class ClassReader {
77 /** The context key for the class reader. */
78 protected static final Context.Key<ClassReader> classReaderKey = new Context.Key<>();
79
80 public static final int INITIAL_BUFFER_SIZE = 0x0fff0;
81
82 Annotate annotate;
83
84 /** Switch: verbose output.
85 */
86 boolean verbose;
87
88 /** Switch: check class file for correct minor version, unrecognized
89 * attributes.
90 */
91 boolean checkClassFile;
92
93 /** Switch: read constant pool and code sections. This switch is initially
94 * set to false but can be turned on from outside.
95 */
96 public boolean readAllOfClassFile = false;
97
98 /** Switch: read GJ signature information.
99 */
100 boolean allowGenerics;
101
102 /** Switch: read varargs attribute.
103 */
104 boolean allowVarargs;
105
106 /** Switch: allow annotations.
107 */
108 boolean allowAnnotations;
109
110 /** Switch: allow simplified varargs.
111 */
112 boolean allowSimplifiedVarargs;
113
114 /** Lint option: warn about classfile issues
115 */
116 boolean lintClassfile;
117
118 /** Switch: preserve parameter names from the variable table.
119 */
120 public boolean saveParameterNames;
121
122 /**
123 * Switch: cache completion failures unless -XDdev is used
124 */
125 private boolean cacheCompletionFailure;
126
127 /**
128 * Switch: prefer source files instead of newer when both source
129 * and class are available
130 **/
131 public boolean preferSource;
132
133 /**
134 * Switch: Search classpath and sourcepath for classes before the
135 * bootclasspath
136 */
137 public boolean userPathsFirst;
138
139 /**
140 * The currently selected profile.
141 */
142 public final Profile profile;
143
144 /** The log to use for verbose output
145 */
146 final Log log;
147
148 /** The symbol table. */
149 Symtab syms;
150
151 Types types;
152
153 /** The name table. */
154 final Names names;
155
156 /** Force a completion failure on this name
157 */
158 final Name completionFailureName;
159
160 /** Access to files
161 */
162 private final JavaFileManager fileManager;
163
164 /** Factory for diagnostics
165 */
166 JCDiagnostic.Factory diagFactory;
167
168 /** Can be reassigned from outside:
169 * the completer to be used for ".java" files. If this remains unassigned
170 * ".java" files will not be loaded.
171 */
172 public SourceCompleter sourceCompleter = null;
173
174 /** The current scope where type variables are entered.
175 */
176 protected Scope typevars;
177
178 /** The path name of the class file currently being read.
179 */
180 protected JavaFileObject currentClassFile = null;
181
182 /** The class or method currently being read.
183 */
184 protected Symbol currentOwner = null;
185
186 /** The buffer containing the currently read class file.
187 */
188 byte[] buf = new byte[INITIAL_BUFFER_SIZE];
189
190 /** The current input pointer.
191 */
192 protected int bp;
193
194 /** The objects of the constant pool.
195 */
196 Object[] poolObj;
197
198 /** For every constant pool entry, an index into buf where the
199 * defining section of the entry is found.
200 */
201 int[] poolIdx;
202
203 /** The major version number of the class file being read. */
204 int majorVersion;
205 /** The minor version number of the class file being read. */
206 int minorVersion;
207
208 /** A table to hold the constant pool indices for method parameter
209 * names, as given in LocalVariableTable attributes.
210 */
211 int[] parameterNameIndices;
212
213 /**
214 * Whether or not any parameter names have been found.
215 */
216 boolean haveParameterNameIndices;
217
218 /** Set this to false every time we start reading a method
219 * and are saving parameter names. Set it to true when we see
220 * MethodParameters, if it's set when we see a LocalVariableTable,
221 * then we ignore the parameter names from the LVT.
222 */
223 boolean sawMethodParameters;
224
225 /**
226 * The set of attribute names for which warnings have been generated for the current class
227 */
228 Set<Name> warnedAttrs = new HashSet<>();
229
230 /**
231 * Completer that delegates to the complete-method of this class.
232 */
233 private final Completer thisCompleter = new Completer() {
234 @Override
235 public void complete(Symbol sym) throws CompletionFailure {
236 ClassReader.this.complete(sym);
237 }
238 };
239
240 public Completer getCompleter() {
241 return thisCompleter;
242 }
243
244 /** Get the ClassReader instance for this invocation. */
245 public static ClassReader instance(Context context) {
246 ClassReader instance = context.get(classReaderKey);
247 if (instance == null)
248 instance = new ClassReader(context);
249 return instance;
250 }
251
252 /** Construct a new class reader. */
253 protected ClassReader(Context context) {
254 context.put(classReaderKey, this);
255 names = Names.instance(context);
256 syms = Symtab.instance(context);
257 types = Types.instance(context);
258 fileManager = context.get(JavaFileManager.class);
259 if (fileManager == null)
260 throw new AssertionError("FileManager initialization error");
261 diagFactory = JCDiagnostic.Factory.instance(context);
262
263 log = Log.instance(context);
264
265 Options options = Options.instance(context);
266 annotate = Annotate.instance(context);
267 verbose = options.isSet(VERBOSE);
268 checkClassFile = options.isSet("-checkclassfile");
269
270 Source source = Source.instance(context);
271 allowGenerics = source.allowGenerics();
272 allowVarargs = source.allowVarargs();
273 allowAnnotations = source.allowAnnotations();
274 allowSimplifiedVarargs = source.allowSimplifiedVarargs();
275
276 saveParameterNames = options.isSet("save-parameter-names");
277 cacheCompletionFailure = options.isUnset("dev");
278 preferSource = "source".equals(options.get("-Xprefer"));
279 userPathsFirst = options.isSet(XXUSERPATHSFIRST);
280
281 profile = Profile.instance(context);
282
283 completionFailureName =
284 options.isSet("failcomplete")
285 ? names.fromString(options.get("failcomplete"))
286 : null;
287
288 typevars = new Scope(syms.noSymbol);
289
290 lintClassfile = Lint.instance(context).isEnabled(LintCategory.CLASSFILE);
291
292 initAttributeReaders();
293 }
294
295 /** Add member to class unless it is synthetic.
296 */
297 private void enterMember(ClassSymbol c, Symbol sym) {
298 // Synthetic members are not entered -- reason lost to history (optimization?).
299 // Lambda methods must be entered because they may have inner classes (which reference them)
300 if ((sym.flags_field & (SYNTHETIC|BRIDGE)) != SYNTHETIC || sym.name.startsWith(names.lambda))
301 c.members_field.enter(sym);
302 }
303
304 /************************************************************************
305 * Error Diagnoses
306 ***********************************************************************/
307
308
309 public class BadClassFile extends CompletionFailure {
310 private static final long serialVersionUID = 0;
311
312 public BadClassFile(TypeSymbol sym, JavaFileObject file, JCDiagnostic diag) {
313 super(sym, createBadClassFileDiagnostic(file, diag));
314 }
315 }
316 // where
317 private JCDiagnostic createBadClassFileDiagnostic(JavaFileObject file, JCDiagnostic diag) {
318 String key = (file.getKind() == JavaFileObject.Kind.SOURCE
319 ? "bad.source.file.header" : "bad.class.file.header");
320 return diagFactory.fragment(key, file, diag);
321 }
322
323 public BadClassFile badClassFile(String key, Object... args) {
324 return new BadClassFile (
325 currentOwner.enclClass(),
326 currentClassFile,
327 diagFactory.fragment(key, args));
328 }
329
330 /************************************************************************
331 * Buffer Access
332 ***********************************************************************/
333
334 /** Read a character.
335 */
336 char nextChar() {
337 return (char)(((buf[bp++] & 0xFF) << 8) + (buf[bp++] & 0xFF));
338 }
339
340 /** Read a byte.
341 */
342 int nextByte() {
343 return buf[bp++] & 0xFF;
344 }
345
346 /** Read an integer.
347 */
348 int nextInt() {
349 return
350 ((buf[bp++] & 0xFF) << 24) +
351 ((buf[bp++] & 0xFF) << 16) +
352 ((buf[bp++] & 0xFF) << 8) +
353 (buf[bp++] & 0xFF);
354 }
355
356 /** Extract a character at position bp from buf.
357 */
358 char getChar(int bp) {
359 return
360 (char)(((buf[bp] & 0xFF) << 8) + (buf[bp+1] & 0xFF));
361 }
362
363 /** Extract an integer at position bp from buf.
364 */
365 int getInt(int bp) {
366 return
367 ((buf[bp] & 0xFF) << 24) +
368 ((buf[bp+1] & 0xFF) << 16) +
369 ((buf[bp+2] & 0xFF) << 8) +
370 (buf[bp+3] & 0xFF);
371 }
372
373
374 /** Extract a long integer at position bp from buf.
375 */
376 long getLong(int bp) {
377 DataInputStream bufin =
378 new DataInputStream(new ByteArrayInputStream(buf, bp, 8));
379 try {
380 return bufin.readLong();
381 } catch (IOException e) {
382 throw new AssertionError(e);
383 }
384 }
385
386 /** Extract a float at position bp from buf.
387 */
388 float getFloat(int bp) {
389 DataInputStream bufin =
390 new DataInputStream(new ByteArrayInputStream(buf, bp, 4));
391 try {
392 return bufin.readFloat();
393 } catch (IOException e) {
394 throw new AssertionError(e);
395 }
396 }
397
398 /** Extract a double at position bp from buf.
399 */
400 double getDouble(int bp) {
401 DataInputStream bufin =
402 new DataInputStream(new ByteArrayInputStream(buf, bp, 8));
403 try {
404 return bufin.readDouble();
405 } catch (IOException e) {
406 throw new AssertionError(e);
407 }
408 }
409
410 /************************************************************************
411 * Constant Pool Access
412 ***********************************************************************/
413
414 /** Index all constant pool entries, writing their start addresses into
415 * poolIdx.
416 */
417 void indexPool() {
418 poolIdx = new int[nextChar()];
419 poolObj = new Object[poolIdx.length];
420 int i = 1;
421 while (i < poolIdx.length) {
422 poolIdx[i++] = bp;
423 byte tag = buf[bp++];
424 switch (tag) {
425 case CONSTANT_Utf8: case CONSTANT_Unicode: {
426 int len = nextChar();
427 bp = bp + len;
428 break;
429 }
430 case CONSTANT_Class:
431 case CONSTANT_String:
432 case CONSTANT_MethodType:
433 bp = bp + 2;
434 break;
435 case CONSTANT_MethodHandle:
436 bp = bp + 3;
437 break;
438 case CONSTANT_Fieldref:
439 case CONSTANT_Methodref:
440 case CONSTANT_InterfaceMethodref:
441 case CONSTANT_NameandType:
442 case CONSTANT_Integer:
443 case CONSTANT_Float:
444 case CONSTANT_InvokeDynamic:
445 bp = bp + 4;
446 break;
447 case CONSTANT_Long:
448 case CONSTANT_Double:
449 bp = bp + 8;
450 i++;
451 break;
452 default:
453 throw badClassFile("bad.const.pool.tag.at",
454 Byte.toString(tag),
455 Integer.toString(bp -1));
456 }
457 }
458 }
459
460 /** Read constant pool entry at start address i, use pool as a cache.
461 */
462 Object readPool(int i) {
463 Object result = poolObj[i];
464 if (result != null) return result;
465
466 int index = poolIdx[i];
467 if (index == 0) return null;
468
469 byte tag = buf[index];
470 switch (tag) {
471 case CONSTANT_Utf8:
472 poolObj[i] = names.fromUtf(buf, index + 3, getChar(index + 1));
473 break;
474 case CONSTANT_Unicode:
475 throw badClassFile("unicode.str.not.supported");
476 case CONSTANT_Class:
477 poolObj[i] = readClassOrType(getChar(index + 1));
478 break;
479 case CONSTANT_String:
480 // FIXME: (footprint) do not use toString here
481 poolObj[i] = readName(getChar(index + 1)).toString();
482 break;
483 case CONSTANT_Fieldref: {
484 ClassSymbol owner = readClassSymbol(getChar(index + 1));
485 NameAndType nt = readNameAndType(getChar(index + 3));
486 poolObj[i] = new VarSymbol(0, nt.name, nt.uniqueType.type, owner);
487 break;
488 }
489 case CONSTANT_Methodref:
490 case CONSTANT_InterfaceMethodref: {
491 ClassSymbol owner = readClassSymbol(getChar(index + 1));
492 NameAndType nt = readNameAndType(getChar(index + 3));
493 poolObj[i] = new MethodSymbol(0, nt.name, nt.uniqueType.type, owner);
494 break;
495 }
496 case CONSTANT_NameandType:
497 poolObj[i] = new NameAndType(
498 readName(getChar(index + 1)),
499 readType(getChar(index + 3)), types);
500 break;
501 case CONSTANT_Integer:
502 poolObj[i] = getInt(index + 1);
503 break;
504 case CONSTANT_Float:
505 poolObj[i] = new Float(getFloat(index + 1));
506 break;
507 case CONSTANT_Long:
508 poolObj[i] = new Long(getLong(index + 1));
509 break;
510 case CONSTANT_Double:
511 poolObj[i] = new Double(getDouble(index + 1));
512 break;
513 case CONSTANT_MethodHandle:
514 skipBytes(4);
515 break;
516 case CONSTANT_MethodType:
517 skipBytes(3);
518 break;
519 case CONSTANT_InvokeDynamic:
520 skipBytes(5);
521 break;
522 default:
523 throw badClassFile("bad.const.pool.tag", Byte.toString(tag));
524 }
525 return poolObj[i];
526 }
527
528 /** Read signature and convert to type.
529 */
530 Type readType(int i) {
531 int index = poolIdx[i];
532 return sigToType(buf, index + 3, getChar(index + 1));
533 }
534
535 /** If name is an array type or class signature, return the
536 * corresponding type; otherwise return a ClassSymbol with given name.
537 */
538 Object readClassOrType(int i) {
539 int index = poolIdx[i];
540 int len = getChar(index + 1);
541 int start = index + 3;
542 Assert.check(buf[start] == '[' || buf[start + len - 1] != ';');
543 // by the above assertion, the following test can be
544 // simplified to (buf[start] == '[')
545 return (buf[start] == '[' || buf[start + len - 1] == ';')
546 ? (Object)sigToType(buf, start, len)
547 : (Object)syms.enterClass(names.fromUtf(internalize(buf, start,
548 len)));
549 }
550
551 /** Read signature and convert to type parameters.
552 */
553 List<Type> readTypeParams(int i) {
554 int index = poolIdx[i];
555 return sigToTypeParams(buf, index + 3, getChar(index + 1));
556 }
557
558 /** Read class entry.
559 */
560 ClassSymbol readClassSymbol(int i) {
561 Object obj = readPool(i);
562 if (obj != null && !(obj instanceof ClassSymbol))
563 throw badClassFile("bad.const.pool.entry",
564 currentClassFile.toString(),
565 "CONSTANT_Class_info", i);
566 return (ClassSymbol)obj;
567 }
568
569 /** Read name.
570 */
571 Name readName(int i) {
572 Object obj = readPool(i);
573 if (obj != null && !(obj instanceof Name))
574 throw badClassFile("bad.const.pool.entry",
575 currentClassFile.toString(),
576 "CONSTANT_Utf8_info or CONSTANT_String_info", i);
577 return (Name)obj;
578 }
579
580 /** Read name and type.
581 */
582 NameAndType readNameAndType(int i) {
583 Object obj = readPool(i);
584 if (obj != null && !(obj instanceof NameAndType))
585 throw badClassFile("bad.const.pool.entry",
586 currentClassFile.toString(),
587 "CONSTANT_NameAndType_info", i);
588 return (NameAndType)obj;
589 }
590
591 /************************************************************************
592 * Reading Types
593 ***********************************************************************/
594
595 /** The unread portion of the currently read type is
596 * signature[sigp..siglimit-1].
597 */
598 byte[] signature;
599 int sigp;
600 int siglimit;
601 boolean sigEnterPhase = false;
602
603 /** Convert signature to type, where signature is a byte array segment.
604 */
605 Type sigToType(byte[] sig, int offset, int len) {
606 signature = sig;
607 sigp = offset;
608 siglimit = offset + len;
609 return sigToType();
610 }
611
612 /** Convert signature to type, where signature is implicit.
613 */
614 Type sigToType() {
615 switch ((char) signature[sigp]) {
616 case 'T':
617 sigp++;
618 int start = sigp;
619 while (signature[sigp] != ';') sigp++;
620 sigp++;
621 return sigEnterPhase
622 ? Type.noType
623 : findTypeVar(names.fromUtf(signature, start, sigp - 1 - start));
624 case '+': {
625 sigp++;
626 Type t = sigToType();
627 return new WildcardType(t, BoundKind.EXTENDS, syms.boundClass,
628 Type.noAnnotations);
629 }
630 case '*':
631 sigp++;
632 return new WildcardType(syms.objectType, BoundKind.UNBOUND,
633 syms.boundClass, Type.noAnnotations);
634 case '-': {
635 sigp++;
636 Type t = sigToType();
637 return new WildcardType(t, BoundKind.SUPER, syms.boundClass,
638 Type.noAnnotations);
639 }
640 case 'B':
641 sigp++;
642 return syms.byteType;
643 case 'C':
644 sigp++;
645 return syms.charType;
646 case 'D':
647 sigp++;
648 return syms.doubleType;
649 case 'F':
650 sigp++;
651 return syms.floatType;
652 case 'I':
653 sigp++;
654 return syms.intType;
655 case 'J':
656 sigp++;
657 return syms.longType;
658 case 'L':
659 {
660 // int oldsigp = sigp;
661 Type t = classSigToType();
662 if (sigp < siglimit && signature[sigp] == '.')
663 throw badClassFile("deprecated inner class signature syntax " +
664 "(please recompile from source)");
665 /*
666 System.err.println(" decoded " +
667 new String(signature, oldsigp, sigp-oldsigp) +
668 " => " + t + " outer " + t.outer());
669 */
670 return t;
671 }
672 case 'S':
673 sigp++;
674 return syms.shortType;
675 case 'V':
676 sigp++;
677 return syms.voidType;
678 case 'Z':
679 sigp++;
680 return syms.booleanType;
681 case '[':
682 sigp++;
683 return new ArrayType(sigToType(), syms.arrayClass,
684 Type.noAnnotations);
685 case '(':
686 sigp++;
687 List<Type> argtypes = sigToTypes(')');
688 Type restype = sigToType();
689 List<Type> thrown = List.nil();
690 while (signature[sigp] == '^') {
691 sigp++;
692 thrown = thrown.prepend(sigToType());
693 }
694 // if there is a typevar in the throws clause we should state it.
695 for (List<Type> l = thrown; l.nonEmpty(); l = l.tail) {
696 if (l.head.hasTag(TYPEVAR)) {
697 l.head.tsym.flags_field |= THROWS;
698 }
699 }
700 return new MethodType(argtypes,
701 restype,
702 thrown.reverse(),
703 syms.methodClass);
704 case '<':
705 typevars = typevars.dup(currentOwner);
706 Type poly = new ForAll(sigToTypeParams(), sigToType());
707 typevars = typevars.leave();
708 return poly;
709 default:
710 throw badClassFile("bad.signature",
711 Convert.utf2string(signature, sigp, 10));
712 }
713 }
714
715 byte[] signatureBuffer = new byte[0];
716 int sbp = 0;
717 /** Convert class signature to type, where signature is implicit.
718 */
719 Type classSigToType() {
720 if (signature[sigp] != 'L')
721 throw badClassFile("bad.class.signature",
722 Convert.utf2string(signature, sigp, 10));
723 sigp++;
724 Type outer = Type.noType;
725 int startSbp = sbp;
726
727 while (true) {
728 final byte c = signature[sigp++];
729 switch (c) {
730
731 case ';': { // end
732 ClassSymbol t = syms.enterClass(names.fromUtf(signatureBuffer,
733 startSbp,
734 sbp - startSbp));
735
736 try {
737 return (outer == Type.noType) ?
738 t.erasure(types) :
739 new ClassType(outer, List.<Type>nil(), t,
740 Type.noAnnotations);
741 } finally {
742 sbp = startSbp;
743 }
744 }
745
746 case '<': // generic arguments
747 ClassSymbol t = syms.enterClass(names.fromUtf(signatureBuffer,
748 startSbp,
749 sbp - startSbp));
750 outer = new ClassType(outer, sigToTypes('>'), t,
751 Type.noAnnotations) {
752 boolean completed = false;
753 @Override
754 public Type getEnclosingType() {
755 if (!completed) {
756 completed = true;
757 tsym.complete();
758 Type enclosingType = tsym.type.getEnclosingType();
759 if (enclosingType != Type.noType) {
760 List<Type> typeArgs =
761 super.getEnclosingType().allparams();
762 List<Type> typeParams =
763 enclosingType.allparams();
764 if (typeParams.length() != typeArgs.length()) {
765 // no "rare" types
766 super.setEnclosingType(types.erasure(enclosingType));
767 } else {
768 super.setEnclosingType(types.subst(enclosingType,
769 typeParams,
770 typeArgs));
771 }
772 } else {
773 super.setEnclosingType(Type.noType);
774 }
775 }
776 return super.getEnclosingType();
777 }
778 @Override
779 public void setEnclosingType(Type outer) {
780 throw new UnsupportedOperationException();
781 }
782 };
783 switch (signature[sigp++]) {
784 case ';':
785 if (sigp < signature.length && signature[sigp] == '.') {
786 // support old-style GJC signatures
787 // The signature produced was
788 // Lfoo/Outer<Lfoo/X;>;.Lfoo/Outer$Inner<Lfoo/Y;>;
789 // rather than say
790 // Lfoo/Outer<Lfoo/X;>.Inner<Lfoo/Y;>;
791 // so we skip past ".Lfoo/Outer$"
792 sigp += (sbp - startSbp) + // "foo/Outer"
793 3; // ".L" and "$"
794 signatureBuffer[sbp++] = (byte)'$';
795 break;
796 } else {
797 sbp = startSbp;
798 return outer;
799 }
800 case '.':
801 signatureBuffer[sbp++] = (byte)'$';
802 break;
803 default:
804 throw new AssertionError(signature[sigp-1]);
805 }
806 continue;
807
808 case '.':
809 //we have seen an enclosing non-generic class
810 if (outer != Type.noType) {
811 t = syms.enterClass(names.fromUtf(signatureBuffer,
812 startSbp,
813 sbp - startSbp));
814 outer = new ClassType(outer, List.<Type>nil(), t,
815 Type.noAnnotations);
816 }
817 signatureBuffer[sbp++] = (byte)'$';
818 continue;
819 case '/':
820 signatureBuffer[sbp++] = (byte)'.';
821 continue;
822 default:
823 signatureBuffer[sbp++] = c;
824 continue;
825 }
826 }
827 }
828
829 /** Convert (implicit) signature to list of types
830 * until `terminator' is encountered.
831 */
832 List<Type> sigToTypes(char terminator) {
833 List<Type> head = List.of(null);
834 List<Type> tail = head;
835 while (signature[sigp] != terminator)
836 tail = tail.setTail(List.of(sigToType()));
837 sigp++;
838 return head.tail;
839 }
840
841 /** Convert signature to type parameters, where signature is a byte
842 * array segment.
843 */
844 List<Type> sigToTypeParams(byte[] sig, int offset, int len) {
845 signature = sig;
846 sigp = offset;
847 siglimit = offset + len;
848 return sigToTypeParams();
849 }
850
851 /** Convert signature to type parameters, where signature is implicit.
852 */
853 List<Type> sigToTypeParams() {
854 List<Type> tvars = List.nil();
855 if (signature[sigp] == '<') {
856 sigp++;
857 int start = sigp;
858 sigEnterPhase = true;
859 while (signature[sigp] != '>')
860 tvars = tvars.prepend(sigToTypeParam());
861 sigEnterPhase = false;
862 sigp = start;
863 while (signature[sigp] != '>')
864 sigToTypeParam();
865 sigp++;
866 }
867 return tvars.reverse();
868 }
869
870 /** Convert (implicit) signature to type parameter.
871 */
872 Type sigToTypeParam() {
873 int start = sigp;
874 while (signature[sigp] != ':') sigp++;
875 Name name = names.fromUtf(signature, start, sigp - start);
876 TypeVar tvar;
877 if (sigEnterPhase) {
878 tvar = new TypeVar(name, currentOwner, syms.botType,
879 Type.noAnnotations);
880 typevars.enter(tvar.tsym);
881 } else {
882 tvar = (TypeVar)findTypeVar(name);
883 }
884 List<Type> bounds = List.nil();
885 boolean allInterfaces = false;
886 if (signature[sigp] == ':' && signature[sigp+1] == ':') {
887 sigp++;
888 allInterfaces = true;
889 }
890 while (signature[sigp] == ':') {
891 sigp++;
892 bounds = bounds.prepend(sigToType());
893 }
894 if (!sigEnterPhase) {
895 types.setBounds(tvar, bounds.reverse(), allInterfaces);
896 }
897 return tvar;
898 }
899
900 /** Find type variable with given name in `typevars' scope.
901 */
902 Type findTypeVar(Name name) {
903 Scope.Entry e = typevars.lookup(name);
904 if (e.scope != null) {
905 return e.sym.type;
906 } else {
907 if (readingClassAttr) {
908 // While reading the class attribute, the supertypes
909 // might refer to a type variable from an enclosing element
910 // (method or class).
911 // If the type variable is defined in the enclosing class,
912 // we can actually find it in
913 // currentOwner.owner.type.getTypeArguments()
914 // However, until we have read the enclosing method attribute
915 // we don't know for sure if this owner is correct. It could
916 // be a method and there is no way to tell before reading the
917 // enclosing method attribute.
918 TypeVar t = new TypeVar(name, currentOwner, syms.botType,
919 Type.noAnnotations);
920 missingTypeVariables = missingTypeVariables.prepend(t);
921 // System.err.println("Missing type var " + name);
922 return t;
923 }
924 throw badClassFile("undecl.type.var", name);
925 }
926 }
927
928 /************************************************************************
929 * Reading Attributes
930 ***********************************************************************/
931
932 protected enum AttributeKind { CLASS, MEMBER }
933
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 }
940
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;
945
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 }
959
960 protected abstract void read(Symbol sym, int attrLen);
961
962 protected final Name name;
963 protected final ClassFile.Version version;
964 protected final Set<AttributeKind> kinds;
965 }
966
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);
973
974 protected Map<Name, AttributeReader> attributeReaders = new HashMap<>();
975
976 private void initAttributeReaders() {
977 AttributeReader[] readers = {
978 // v45.3 attributes
979
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 },
988
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 },
997
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 },
1003
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 },
1014
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 },
1021
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 },
1057
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 },
1075
1076
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 },
1093
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 },
1101
1102 // standard v49 attributes
1103
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 },
1111
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 }
1117
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<>();
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;
1139
1140 }
1141 }
1142 },
1143
1144 // v49 annotation attributes
1145
1146 new AttributeReader(names.AnnotationDefault, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1147 protected void read(Symbol sym, int attrLen) {
1148 attachAnnotationDefault(sym);
1149 }
1150 },
1151
1152 new AttributeReader(names.RuntimeInvisibleAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1153 protected void read(Symbol sym, int attrLen) {
1154 attachAnnotations(sym);
1155 }
1156 },
1157
1158 new AttributeReader(names.RuntimeInvisibleParameterAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1159 protected void read(Symbol sym, int attrLen) {
1160 attachParameterAnnotations(sym);
1161 }
1162 },
1163
1164 new AttributeReader(names.RuntimeVisibleAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1165 protected void read(Symbol sym, int attrLen) {
1166 attachAnnotations(sym);
1167 }
1168 },
1169
1170 new AttributeReader(names.RuntimeVisibleParameterAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1171 protected void read(Symbol sym, int attrLen) {
1172 attachParameterAnnotations(sym);
1173 }
1174 },
1175
1176 // additional "legacy" v49 attributes, superceded by flags
1177
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 },
1184
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 },
1192
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 },
1198
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 },
1205
1206 new AttributeReader(names.RuntimeVisibleTypeAnnotations, V52, CLASS_OR_MEMBER_ATTRIBUTE) {
1207 protected void read(Symbol sym, int attrLen) {
1208 attachTypeAnnotations(sym);
1209 }
1210 },
1211
1212 new AttributeReader(names.RuntimeInvisibleTypeAnnotations, V52, CLASS_OR_MEMBER_ATTRIBUTE) {
1213 protected void read(Symbol sym, int attrLen) {
1214 attachTypeAnnotations(sym);
1215 }
1216 },
1217
1218
1219 // The following attributes for a Code attribute are not currently handled
1220 // StackMapTable
1221 // SourceDebugExtension
1222 // LineNumberTable
1223 // LocalVariableTypeTable
1224 };
1225
1226 for (AttributeReader r: readers)
1227 attributeReaders.put(r.name, r);
1228 }
1229
1230 /** Report unrecognized attribute.
1231 */
1232 void unrecognized(Name attrName) {
1233 if (checkClassFile)
1234 printCCF("ccf.unrecognized.attribute", attrName);
1235 }
1236
1237
1238
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 = readNameAndType(nextChar());
1247
1248 if (c.members_field == null)
1249 throw badClassFile("bad.enclosing.class", self, c);
1250
1251 MethodSymbol m = findMethod(nt, c.members_field, self.flags());
1252 if (nt != null && m == null)
1253 throw badClassFile("bad.enclosing.method", self);
1254
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);
1261
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<>();
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 }
1280
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 }
1292
1293 private MethodSymbol findMethod(NameAndType nt, Scope scope, long flags) {
1294 if (nt == null)
1295 return null;
1296
1297 MethodType type = nt.uniqueType.type.asMethodType();
1298
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;
1302
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;
1312
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 }
1322
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 }
1336
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 }
1344
1345 /** Read member attributes.
1346 */
1347 void readMemberAttrs(Symbol sym) {
1348 readAttrs(sym, AttributeKind.MEMBER);
1349 }
1350
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 }
1365
1366 private boolean readingClassAttr = false;
1367 private List<Type> missingTypeVariables = List.nil();
1368 private List<Type> foundTypeVariables = List.nil();
1369
1370 /** Read class attributes.
1371 */
1372 void readClassAttrs(ClassSymbol c) {
1373 readAttrs(c, AttributeKind.CLASS);
1374 }
1375
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 }
1388
1389 /************************************************************************
1390 * Reading Java-language annotations
1391 ***********************************************************************/
1392
1393 /** Attach annotations.
1394 */
1395 void attachAnnotations(final Symbol sym) {
1396 int numAttributes = nextChar();
1397 if (numAttributes != 0) {
1398 ListBuffer<CompoundAnnotationProxy> proxies = new ListBuffer<>();
1399 for (int i = 0; i<numAttributes; i++) {
1400 CompoundAnnotationProxy proxy = readCompoundAnnotation();
1401 if (proxy.type.tsym == syms.proprietaryType.tsym)
1402 sym.flags_field |= PROPRIETARY;
1403 else if (proxy.type.tsym == syms.profileType.tsym) {
1404 if (profile != Profile.DEFAULT) {
1405 for (Pair<Name,Attribute> v: proxy.values) {
1406 if (v.fst == names.value && v.snd instanceof Attribute.Constant) {
1407 Attribute.Constant c = (Attribute.Constant) v.snd;
1408 if (c.type == syms.intType && ((Integer) c.value) > profile.value) {
1409 sym.flags_field |= NOT_IN_PROFILE;
1410 }
1411 }
1412 }
1413 }
1414 } else
1415 proxies.append(proxy);
1416 }
1417 annotate.normal(new AnnotationCompleter(sym, proxies.toList()));
1418 }
1419 }
1420
1421 /** Attach parameter annotations.
1422 */
1423 void attachParameterAnnotations(final Symbol method) {
1424 final MethodSymbol meth = (MethodSymbol)method;
1425 int numParameters = buf[bp++] & 0xFF;
1426 List<VarSymbol> parameters = meth.params();
1427 int pnum = 0;
1428 while (parameters.tail != null) {
1429 attachAnnotations(parameters.head);
1430 parameters = parameters.tail;
1431 pnum++;
1432 }
1433 if (pnum != numParameters) {
1434 throw badClassFile("bad.runtime.invisible.param.annotations", meth);
1435 }
1436 }
1437
1438 void attachTypeAnnotations(final Symbol sym) {
1439 int numAttributes = nextChar();
1440 if (numAttributes != 0) {
1441 ListBuffer<TypeAnnotationProxy> proxies = new ListBuffer<>();
1442 for (int i = 0; i < numAttributes; i++)
1443 proxies.append(readTypeAnnotation());
1444 annotate.normal(new TypeAnnotationCompleter(sym, proxies.toList()));
1445 }
1446 }
1447
1448 /** Attach the default value for an annotation element.
1449 */
1450 void attachAnnotationDefault(final Symbol sym) {
1451 final MethodSymbol meth = (MethodSymbol)sym; // only on methods
1452 final Attribute value = readAttributeValue();
1453
1454 // The default value is set later during annotation. It might
1455 // be the case that the Symbol sym is annotated _after_ the
1456 // repeating instances that depend on this default value,
1457 // because of this we set an interim value that tells us this
1458 // element (most likely) has a default.
1459 //
1460 // Set interim value for now, reset just before we do this
1461 // properly at annotate time.
1462 meth.defaultValue = value;
1463 annotate.normal(new AnnotationDefaultCompleter(meth, value));
1464 }
1465
1466 Type readTypeOrClassSymbol(int i) {
1467 // support preliminary jsr175-format class files
1468 if (buf[poolIdx[i]] == CONSTANT_Class)
1469 return readClassSymbol(i).type;
1470 return readType(i);
1471 }
1472 Type readEnumType(int i) {
1473 // support preliminary jsr175-format class files
1474 int index = poolIdx[i];
1475 int length = getChar(index + 1);
1476 if (buf[index + length + 2] != ';')
1477 return syms.enterClass(readName(i)).type;
1478 return readType(i);
1479 }
1480
1481 CompoundAnnotationProxy readCompoundAnnotation() {
1482 Type t = readTypeOrClassSymbol(nextChar());
1483 int numFields = nextChar();
1484 ListBuffer<Pair<Name,Attribute>> pairs = new ListBuffer<>();
1485 for (int i=0; i<numFields; i++) {
1486 Name name = readName(nextChar());
1487 Attribute value = readAttributeValue();
1488 pairs.append(new Pair<>(name, value));
1489 }
1490 return new CompoundAnnotationProxy(t, pairs.toList());
1491 }
1492
1493 TypeAnnotationProxy readTypeAnnotation() {
1494 TypeAnnotationPosition position = readPosition();
1495 CompoundAnnotationProxy proxy = readCompoundAnnotation();
1496
1497 return new TypeAnnotationProxy(proxy, position);
1498 }
1499
1500 TypeAnnotationPosition readPosition() {
1501 int tag = nextByte(); // TargetType tag is a byte
1502
1503 if (!TargetType.isValidTargetTypeValue(tag))
1504 throw this.badClassFile("bad.type.annotation.value", String.format("0x%02X", tag));
1505
1506 TargetType type = TargetType.fromTargetTypeValue(tag);
1507
1508 switch (type) {
1509 // instanceof
1510 case INSTANCEOF: {
1511 final int offset = nextChar();
1512 final TypeAnnotationPosition position =
1513 TypeAnnotationPosition.instanceOf(readTypePath());
1514 position.offset = offset;
1515 return position;
1516 }
1517 // new expression
1518 case NEW: {
1519 final int offset = nextChar();
1520 final TypeAnnotationPosition position =
1521 TypeAnnotationPosition.newObj(readTypePath());
1522 position.offset = offset;
1523 return position;
1524 }
1525 // constructor/method reference receiver
1526 case CONSTRUCTOR_REFERENCE: {
1527 final int offset = nextChar();
1528 final TypeAnnotationPosition position =
1529 TypeAnnotationPosition.constructorRef(readTypePath());
1530 position.offset = offset;
1531 return position;
1532 }
1533 case METHOD_REFERENCE: {
1534 final int offset = nextChar();
1535 final TypeAnnotationPosition position =
1536 TypeAnnotationPosition.methodRef(readTypePath());
1537 position.offset = offset;
1538 return position;
1539 }
1540 // local variable
1541 case LOCAL_VARIABLE: {
1542 final int table_length = nextChar();
1543 final TypeAnnotationPosition position =
1544 TypeAnnotationPosition.localVariable(readTypePath());
1545
1546 position.lvarOffset = new int[table_length];
1547 position.lvarLength = new int[table_length];
1548 position.lvarIndex = new int[table_length];
1549
1550 for (int i = 0; i < table_length; ++i) {
1551 position.lvarOffset[i] = nextChar();
1552 position.lvarLength[i] = nextChar();
1553 position.lvarIndex[i] = nextChar();
1554 }
1555 return position;
1556 }
1557 // resource variable
1558 case RESOURCE_VARIABLE: {
1559 final int table_length = nextChar();
1560 final TypeAnnotationPosition position =
1561 TypeAnnotationPosition.resourceVariable(readTypePath());
1562
1563 position.lvarOffset = new int[table_length];
1564 position.lvarLength = new int[table_length];
1565 position.lvarIndex = new int[table_length];
1566
1567 for (int i = 0; i < table_length; ++i) {
1568 position.lvarOffset[i] = nextChar();
1569 position.lvarLength[i] = nextChar();
1570 position.lvarIndex[i] = nextChar();
1571 }
1572 return position;
1573 }
1574 // exception parameter
1575 case EXCEPTION_PARAMETER: {
1576 final int exception_index = nextChar();
1577 final TypeAnnotationPosition position =
1578 TypeAnnotationPosition.exceptionParameter(readTypePath());
1579 position.setExceptionIndex(exception_index);
1580 return position;
1581 }
1582 // method receiver
1583 case METHOD_RECEIVER:
1584 return TypeAnnotationPosition.methodReceiver(readTypePath());
1585 // type parameter
1586 case CLASS_TYPE_PARAMETER: {
1587 final int parameter_index = nextByte();
1588 return TypeAnnotationPosition
1589 .typeParameter(readTypePath(), parameter_index);
1590 }
1591 case METHOD_TYPE_PARAMETER: {
1592 final int parameter_index = nextByte();
1593 return TypeAnnotationPosition
1594 .methodTypeParameter(readTypePath(), parameter_index);
1595 }
1596 // type parameter bound
1597 case CLASS_TYPE_PARAMETER_BOUND: {
1598 final int parameter_index = nextByte();
1599 final int bound_index = nextByte();
1600 return TypeAnnotationPosition
1601 .typeParameterBound(readTypePath(), parameter_index,
1602 bound_index);
1603 }
1604 case METHOD_TYPE_PARAMETER_BOUND: {
1605 final int parameter_index = nextByte();
1606 final int bound_index = nextByte();
1607 return TypeAnnotationPosition
1608 .methodTypeParameterBound(readTypePath(), parameter_index,
1609 bound_index);
1610 }
1611 // class extends or implements clause
1612 case CLASS_EXTENDS: {
1613 final int type_index = nextChar();
1614 return TypeAnnotationPosition.classExtends(readTypePath(),
1615 type_index);
1616 }
1617 // throws
1618 case THROWS: {
1619 final int type_index = nextChar();
1620 return TypeAnnotationPosition.methodThrows(readTypePath(),
1621 type_index);
1622 }
1623 // method parameter
1624 case METHOD_FORMAL_PARAMETER: {
1625 final int parameter_index = nextByte();
1626 return TypeAnnotationPosition.methodParameter(readTypePath(),
1627 parameter_index);
1628 }
1629 // type cast
1630 case CAST: {
1631 final int offset = nextChar();
1632 final int type_index = nextByte();
1633 final TypeAnnotationPosition position =
1634 TypeAnnotationPosition.typeCast(readTypePath(), type_index);
1635 position.offset = offset;
1636 return position;
1637 }
1638 // method/constructor/reference type argument
1639 case CONSTRUCTOR_INVOCATION_TYPE_ARGUMENT: {
1640 final int offset = nextChar();
1641 final int type_index = nextByte();
1642 final TypeAnnotationPosition position = TypeAnnotationPosition
1643 .constructorInvocationTypeArg(readTypePath(), type_index);
1644 position.offset = offset;
1645 return position;
1646 }
1647 case METHOD_INVOCATION_TYPE_ARGUMENT: {
1648 final int offset = nextChar();
1649 final int type_index = nextByte();
1650 final TypeAnnotationPosition position = TypeAnnotationPosition
1651 .methodInvocationTypeArg(readTypePath(), type_index);
1652 position.offset = offset;
1653 return position;
1654 }
1655 case CONSTRUCTOR_REFERENCE_TYPE_ARGUMENT: {
1656 final int offset = nextChar();
1657 final int type_index = nextByte();
1658 final TypeAnnotationPosition position = TypeAnnotationPosition
1659 .constructorRefTypeArg(readTypePath(), type_index);
1660 position.offset = offset;
1661 return position;
1662 }
1663 case METHOD_REFERENCE_TYPE_ARGUMENT: {
1664 final int offset = nextChar();
1665 final int type_index = nextByte();
1666 final TypeAnnotationPosition position = TypeAnnotationPosition
1667 .methodRefTypeArg(readTypePath(), type_index);
1668 position.offset = offset;
1669 return position;
1670 }
1671 // We don't need to worry about these
1672 case METHOD_RETURN:
1673 return TypeAnnotationPosition.methodReturn(readTypePath());
1674 case FIELD:
1675 return TypeAnnotationPosition.field(readTypePath());
1676 default:
1677 throw new AssertionError("jvm.ClassReader: Unknown target type for position: " + type);
1678 }
1679 }
1680
1681 List<TypeAnnotationPosition.TypePathEntry> readTypePath() {
1682 int len = nextByte();
1683 ListBuffer<Integer> loc = new ListBuffer<>();
1684 for (int i = 0; i < len * TypeAnnotationPosition.TypePathEntry.bytesPerEntry; ++i)
1685 loc = loc.append(nextByte());
1686
1687 return TypeAnnotationPosition.getTypePathFromBinary(loc.toList());
1688
1689 }
1690
1691 Attribute readAttributeValue() {
1692 char c = (char) buf[bp++];
1693 switch (c) {
1694 case 'B':
1695 return new Attribute.Constant(syms.byteType, readPool(nextChar()));
1696 case 'C':
1697 return new Attribute.Constant(syms.charType, readPool(nextChar()));
1698 case 'D':
1699 return new Attribute.Constant(syms.doubleType, readPool(nextChar()));
1700 case 'F':
1701 return new Attribute.Constant(syms.floatType, readPool(nextChar()));
1702 case 'I':
1703 return new Attribute.Constant(syms.intType, readPool(nextChar()));
1704 case 'J':
1705 return new Attribute.Constant(syms.longType, readPool(nextChar()));
1706 case 'S':
1707 return new Attribute.Constant(syms.shortType, readPool(nextChar()));
1708 case 'Z':
1709 return new Attribute.Constant(syms.booleanType, readPool(nextChar()));
1710 case 's':
1711 return new Attribute.Constant(syms.stringType, readPool(nextChar()).toString());
1712 case 'e':
1713 return new EnumAttributeProxy(readEnumType(nextChar()), readName(nextChar()));
1714 case 'c':
1715 return new Attribute.Class(types, readTypeOrClassSymbol(nextChar()));
1716 case '[': {
1717 int n = nextChar();
1718 ListBuffer<Attribute> l = new ListBuffer<>();
1719 for (int i=0; i<n; i++)
1720 l.append(readAttributeValue());
1721 return new ArrayAttributeProxy(l.toList());
1722 }
1723 case '@':
1724 return readCompoundAnnotation();
1725 default:
1726 throw new AssertionError("unknown annotation tag '" + c + "'");
1727 }
1728 }
1729
1730 interface ProxyVisitor extends Attribute.Visitor {
1731 void visitEnumAttributeProxy(EnumAttributeProxy proxy);
1732 void visitArrayAttributeProxy(ArrayAttributeProxy proxy);
1733 void visitCompoundAnnotationProxy(CompoundAnnotationProxy proxy);
1734 }
1735
1736 static class EnumAttributeProxy extends Attribute {
1737 Type enumType;
1738 Name enumerator;
1739 public EnumAttributeProxy(Type enumType, Name enumerator) {
1740 super(null);
1741 this.enumType = enumType;
1742 this.enumerator = enumerator;
1743 }
1744 public void accept(Visitor v) { ((ProxyVisitor)v).visitEnumAttributeProxy(this); }
1745 @Override
1746 public String toString() {
1747 return "/*proxy enum*/" + enumType + "." + enumerator;
1748 }
1749 }
1750
1751 static class ArrayAttributeProxy extends Attribute {
1752 List<Attribute> values;
1753 ArrayAttributeProxy(List<Attribute> values) {
1754 super(null);
1755 this.values = values;
1756 }
1757 public void accept(Visitor v) { ((ProxyVisitor)v).visitArrayAttributeProxy(this); }
1758 @Override
1759 public String toString() {
1760 return "{" + values + "}";
1761 }
1762 }
1763
1764 /** A temporary proxy representing a compound attribute.
1765 */
1766 static class CompoundAnnotationProxy extends Attribute {
1767 final List<Pair<Name,Attribute>> values;
1768 public CompoundAnnotationProxy(Type type,
1769 List<Pair<Name,Attribute>> values) {
1770 super(type);
1771 this.values = values;
1772 }
1773 public void accept(Visitor v) { ((ProxyVisitor)v).visitCompoundAnnotationProxy(this); }
1774 @Override
1775 public String toString() {
1776 StringBuilder buf = new StringBuilder();
1777 buf.append("@");
1778 buf.append(type.tsym.getQualifiedName());
1779 buf.append("/*proxy*/{");
1780 boolean first = true;
1781 for (List<Pair<Name,Attribute>> v = values;
1782 v.nonEmpty(); v = v.tail) {
1783 Pair<Name,Attribute> value = v.head;
1784 if (!first) buf.append(",");
1785 first = false;
1786 buf.append(value.fst);
1787 buf.append("=");
1788 buf.append(value.snd);
1789 }
1790 buf.append("}");
1791 return buf.toString();
1792 }
1793 }
1794
1795 /** A temporary proxy representing a type annotation.
1796 */
1797 static class TypeAnnotationProxy {
1798 final CompoundAnnotationProxy compound;
1799 final TypeAnnotationPosition position;
1800 public TypeAnnotationProxy(CompoundAnnotationProxy compound,
1801 TypeAnnotationPosition position) {
1802 this.compound = compound;
1803 this.position = position;
1804 }
1805 }
1806
1807 class AnnotationDeproxy implements ProxyVisitor {
1808 private ClassSymbol requestingOwner = currentOwner.kind == MTH
1809 ? currentOwner.enclClass() : (ClassSymbol)currentOwner;
1810
1811 List<Attribute.Compound> deproxyCompoundList(List<CompoundAnnotationProxy> pl) {
1812 // also must fill in types!!!!
1813 ListBuffer<Attribute.Compound> buf = new ListBuffer<>();
1814 for (List<CompoundAnnotationProxy> l = pl; l.nonEmpty(); l=l.tail) {
1815 buf.append(deproxyCompound(l.head));
1816 }
1817 return buf.toList();
1818 }
1819
1820 Attribute.Compound deproxyCompound(CompoundAnnotationProxy a) {
1821 ListBuffer<Pair<Symbol.MethodSymbol,Attribute>> buf = new ListBuffer<>();
1822 for (List<Pair<Name,Attribute>> l = a.values;
1823 l.nonEmpty();
1824 l = l.tail) {
1825 MethodSymbol meth = findAccessMethod(a.type, l.head.fst);
1826 buf.append(new Pair<>(meth, deproxy(meth.type.getReturnType(), l.head.snd)));
1827 }
1828 return new Attribute.Compound(a.type, buf.toList());
1829 }
1830
1831 MethodSymbol findAccessMethod(Type container, Name name) {
1832 CompletionFailure failure = null;
1833 try {
1834 for (Scope.Entry e = container.tsym.members().lookup(name);
1835 e.scope != null;
1836 e = e.next()) {
1837 Symbol sym = e.sym;
1838 if (sym.kind == MTH && sym.type.getParameterTypes().length() == 0)
1839 return (MethodSymbol) sym;
1840 }
1841 } catch (CompletionFailure ex) {
1842 failure = ex;
1843 }
1844 // The method wasn't found: emit a warning and recover
1845 JavaFileObject prevSource = log.useSource(requestingOwner.classfile);
1846 try {
1847 if (failure == null) {
1848 log.warning("annotation.method.not.found",
1849 container,
1850 name);
1851 } else {
1852 log.warning("annotation.method.not.found.reason",
1853 container,
1854 name,
1855 failure.getDetailValue());//diagnostic, if present
1856 }
1857 } finally {
1858 log.useSource(prevSource);
1859 }
1860 // Construct a new method type and symbol. Use bottom
1861 // type (typeof null) as return type because this type is
1862 // a subtype of all reference types and can be converted
1863 // to primitive types by unboxing.
1864 MethodType mt = new MethodType(List.<Type>nil(),
1865 syms.botType,
1866 List.<Type>nil(),
1867 syms.methodClass);
1868 return new MethodSymbol(PUBLIC | ABSTRACT, name, mt, container.tsym);
1869 }
1870
1871 Attribute result;
1872 Type type;
1873 Attribute deproxy(Type t, Attribute a) {
1874 Type oldType = type;
1875 try {
1876 type = t;
1877 a.accept(this);
1878 return result;
1879 } finally {
1880 type = oldType;
1881 }
1882 }
1883
1884 // implement Attribute.Visitor below
1885
1886 public void visitConstant(Attribute.Constant value) {
1887 // assert value.type == type;
1888 result = value;
1889 }
1890
1891 public void visitClass(Attribute.Class clazz) {
1892 result = clazz;
1893 }
1894
1895 public void visitEnum(Attribute.Enum e) {
1896 throw new AssertionError(); // shouldn't happen
1897 }
1898
1899 public void visitCompound(Attribute.Compound compound) {
1900 throw new AssertionError(); // shouldn't happen
1901 }
1902
1903 public void visitArray(Attribute.Array array) {
1904 throw new AssertionError(); // shouldn't happen
1905 }
1906
1907 public void visitError(Attribute.Error e) {
1908 throw new AssertionError(); // shouldn't happen
1909 }
1910
1911 public void visitEnumAttributeProxy(EnumAttributeProxy proxy) {
1912 // type.tsym.flatName() should == proxy.enumFlatName
1913 TypeSymbol enumTypeSym = proxy.enumType.tsym;
1914 VarSymbol enumerator = null;
1915 CompletionFailure failure = null;
1916 try {
1917 for (Scope.Entry e = enumTypeSym.members().lookup(proxy.enumerator);
1918 e.scope != null;
1919 e = e.next()) {
1920 if (e.sym.kind == VAR) {
1921 enumerator = (VarSymbol)e.sym;
1922 break;
1923 }
1924 }
1925 }
1926 catch (CompletionFailure ex) {
1927 failure = ex;
1928 }
1929 if (enumerator == null) {
1930 if (failure != null) {
1931 log.warning("unknown.enum.constant.reason",
1932 currentClassFile, enumTypeSym, proxy.enumerator,
1933 failure.getDiagnostic());
1934 } else {
1935 log.warning("unknown.enum.constant",
1936 currentClassFile, enumTypeSym, proxy.enumerator);
1937 }
1938 result = new Attribute.Enum(enumTypeSym.type,
1939 new VarSymbol(0, proxy.enumerator, syms.botType, enumTypeSym));
1940 } else {
1941 result = new Attribute.Enum(enumTypeSym.type, enumerator);
1942 }
1943 }
1944
1945 public void visitArrayAttributeProxy(ArrayAttributeProxy proxy) {
1946 int length = proxy.values.length();
1947 Attribute[] ats = new Attribute[length];
1948 Type elemtype = types.elemtype(type);
1949 int i = 0;
1950 for (List<Attribute> p = proxy.values; p.nonEmpty(); p = p.tail) {
1951 ats[i++] = deproxy(elemtype, p.head);
1952 }
1953 result = new Attribute.Array(type, ats);
1954 }
1955
1956 public void visitCompoundAnnotationProxy(CompoundAnnotationProxy proxy) {
1957 result = deproxyCompound(proxy);
1958 }
1959 }
1960
1961 class AnnotationDefaultCompleter extends AnnotationDeproxy implements Annotate.Worker {
1962 final MethodSymbol sym;
1963 final Attribute value;
1964 final JavaFileObject classFile = currentClassFile;
1965 @Override
1966 public String toString() {
1967 return " ClassReader store default for " + sym.owner + "." + sym + " is " + value;
1968 }
1969 AnnotationDefaultCompleter(MethodSymbol sym, Attribute value) {
1970 this.sym = sym;
1971 this.value = value;
1972 }
1973 // implement Annotate.Worker.run()
1974 public void run() {
1975 JavaFileObject previousClassFile = currentClassFile;
1976 try {
1977 // Reset the interim value set earlier in
1978 // attachAnnotationDefault().
1979 sym.defaultValue = null;
1980 currentClassFile = classFile;
1981 sym.defaultValue = deproxy(sym.type.getReturnType(), value);
1982 } finally {
1983 currentClassFile = previousClassFile;
1984 }
1985 }
1986 }
1987
1988 class AnnotationCompleter extends AnnotationDeproxy implements Annotate.Worker {
1989 final Symbol sym;
1990 final List<CompoundAnnotationProxy> l;
1991 final JavaFileObject classFile;
1992 @Override
1993 public String toString() {
1994 return " ClassReader annotate " + sym.owner + "." + sym + " with " + l;
1995 }
1996 AnnotationCompleter(Symbol sym, List<CompoundAnnotationProxy> l) {
1997 this.sym = sym;
1998 this.l = l;
1999 this.classFile = currentClassFile;
2000 }
2001 // implement Annotate.Worker.run()
2002 public void run() {
2003 JavaFileObject previousClassFile = currentClassFile;
2004 try {
2005 currentClassFile = classFile;
2006 List<Attribute.Compound> newList = deproxyCompoundList(l);
2007 if (sym.annotationsPendingCompletion()) {
2008 sym.setDeclarationAttributes(newList);
2009 } else {
2010 sym.appendAttributes(newList);
2011 }
2012 } finally {
2013 currentClassFile = previousClassFile;
2014 }
2015 }
2016 }
2017
2018 class TypeAnnotationCompleter extends AnnotationCompleter {
2019
2020 List<TypeAnnotationProxy> proxies;
2021
2022 TypeAnnotationCompleter(Symbol sym,
2023 List<TypeAnnotationProxy> proxies) {
2024 super(sym, List.<CompoundAnnotationProxy>nil());
2025 this.proxies = proxies;
2026 }
2027
2028 List<Attribute.TypeCompound> deproxyTypeCompoundList(List<TypeAnnotationProxy> proxies) {
2029 ListBuffer<Attribute.TypeCompound> buf = new ListBuffer<>();
2030 for (TypeAnnotationProxy proxy: proxies) {
2031 Attribute.Compound compound = deproxyCompound(proxy.compound);
2032 Attribute.TypeCompound typeCompound = new Attribute.TypeCompound(compound, proxy.position);
2033 buf.add(typeCompound);
2034 }
2035 return buf.toList();
2036 }
2037
2038 @Override
2039 public void run() {
2040 JavaFileObject previousClassFile = currentClassFile;
2041 try {
2042 currentClassFile = classFile;
2043 List<Attribute.TypeCompound> newList = deproxyTypeCompoundList(proxies);
2044 sym.setTypeAttributes(newList.prependList(sym.getRawTypeAttributes()));
2045 } finally {
2046 currentClassFile = previousClassFile;
2047 }
2048 }
2049 }
2050
2051
2052 /************************************************************************
2053 * Reading Symbols
2054 ***********************************************************************/
2055
2056 /** Read a field.
2057 */
2058 VarSymbol readField() {
2059 long flags = adjustFieldFlags(nextChar());
2060 Name name = readName(nextChar());
2061 Type type = readType(nextChar());
2062 VarSymbol v = new VarSymbol(flags, name, type, currentOwner);
2063 readMemberAttrs(v);
2064 return v;
2065 }
2066
2067 /** Read a method.
2068 */
2069 MethodSymbol readMethod() {
2070 long flags = adjustMethodFlags(nextChar());
2071 Name name = readName(nextChar());
2072 Type type = readType(nextChar());
2073 if (currentOwner.isInterface() &&
2074 (flags & ABSTRACT) == 0 && !name.equals(names.clinit)) {
2075 if (majorVersion > Target.JDK1_8.majorVersion ||
2076 (majorVersion == Target.JDK1_8.majorVersion && minorVersion >= Target.JDK1_8.minorVersion)) {
2077 if ((flags & STATIC) == 0) {
2078 currentOwner.flags_field |= DEFAULT;
2079 flags |= DEFAULT | ABSTRACT;
2080 }
2081 } else {
2082 //protect against ill-formed classfiles
2083 throw badClassFile((flags & STATIC) == 0 ? "invalid.default.interface" : "invalid.static.interface",
2084 Integer.toString(majorVersion),
2085 Integer.toString(minorVersion));
2086 }
2087 }
2088 if (name == names.init && currentOwner.hasOuterInstance()) {
2089 // Sometimes anonymous classes don't have an outer
2090 // instance, however, there is no reliable way to tell so
2091 // we never strip this$n
2092 if (!currentOwner.name.isEmpty())
2093 type = new MethodType(adjustMethodParams(flags, type.getParameterTypes()),
2094 type.getReturnType(),
2095 type.getThrownTypes(),
2096 syms.methodClass);
2097 }
2098 MethodSymbol m = new MethodSymbol(flags, name, type, currentOwner);
2099 if (types.isSignaturePolymorphic(m)) {
2100 m.flags_field |= SIGNATURE_POLYMORPHIC;
2101 }
2102 if (saveParameterNames)
2103 initParameterNames(m);
2104 Symbol prevOwner = currentOwner;
2105 currentOwner = m;
2106 try {
2107 readMemberAttrs(m);
2108 } finally {
2109 currentOwner = prevOwner;
2110 }
2111 if (saveParameterNames)
2112 setParameterNames(m, type);
2113 return m;
2114 }
2115
2116 private List<Type> adjustMethodParams(long flags, List<Type> args) {
2117 boolean isVarargs = (flags & VARARGS) != 0;
2118 if (isVarargs) {
2119 Type varargsElem = args.last();
2120 ListBuffer<Type> adjustedArgs = new ListBuffer<>();
2121 for (Type t : args) {
2122 adjustedArgs.append(t != varargsElem ?
2123 t :
2124 ((ArrayType)t).makeVarargs());
2125 }
2126 args = adjustedArgs.toList();
2127 }
2128 return args.tail;
2129 }
2130
2131 /**
2132 * Init the parameter names array.
2133 * Parameter names are currently inferred from the names in the
2134 * LocalVariableTable attributes of a Code attribute.
2135 * (Note: this means parameter names are currently not available for
2136 * methods without a Code attribute.)
2137 * This method initializes an array in which to store the name indexes
2138 * of parameter names found in LocalVariableTable attributes. It is
2139 * slightly supersized to allow for additional slots with a start_pc of 0.
2140 */
2141 void initParameterNames(MethodSymbol sym) {
2142 // make allowance for synthetic parameters.
2143 final int excessSlots = 4;
2144 int expectedParameterSlots =
2145 Code.width(sym.type.getParameterTypes()) + excessSlots;
2146 if (parameterNameIndices == null
2147 || parameterNameIndices.length < expectedParameterSlots) {
2148 parameterNameIndices = new int[expectedParameterSlots];
2149 } else
2150 Arrays.fill(parameterNameIndices, 0);
2151 haveParameterNameIndices = false;
2152 sawMethodParameters = false;
2153 }
2154
2155 /**
2156 * Set the parameter names for a symbol from the name index in the
2157 * parameterNameIndicies array. The type of the symbol may have changed
2158 * while reading the method attributes (see the Signature attribute).
2159 * This may be because of generic information or because anonymous
2160 * synthetic parameters were added. The original type (as read from
2161 * the method descriptor) is used to help guess the existence of
2162 * anonymous synthetic parameters.
2163 * On completion, sym.savedParameter names will either be null (if
2164 * no parameter names were found in the class file) or will be set to a
2165 * list of names, one per entry in sym.type.getParameterTypes, with
2166 * any missing names represented by the empty name.
2167 */
2168 void setParameterNames(MethodSymbol sym, Type jvmType) {
2169 // if no names were found in the class file, there's nothing more to do
2170 if (!haveParameterNameIndices)
2171 return;
2172 // If we get parameter names from MethodParameters, then we
2173 // don't need to skip.
2174 int firstParam = 0;
2175 if (!sawMethodParameters) {
2176 firstParam = ((sym.flags() & STATIC) == 0) ? 1 : 0;
2177 // the code in readMethod may have skipped the first
2178 // parameter when setting up the MethodType. If so, we
2179 // make a corresponding allowance here for the position of
2180 // the first parameter. Note that this assumes the
2181 // skipped parameter has a width of 1 -- i.e. it is not
2182 // a double width type (long or double.)
2183 if (sym.name == names.init && currentOwner.hasOuterInstance()) {
2184 // Sometimes anonymous classes don't have an outer
2185 // instance, however, there is no reliable way to tell so
2186 // we never strip this$n
2187 if (!currentOwner.name.isEmpty())
2188 firstParam += 1;
2189 }
2190
2191 if (sym.type != jvmType) {
2192 // reading the method attributes has caused the
2193 // symbol's type to be changed. (i.e. the Signature
2194 // attribute.) This may happen if there are hidden
2195 // (synthetic) parameters in the descriptor, but not
2196 // in the Signature. The position of these hidden
2197 // parameters is unspecified; for now, assume they are
2198 // at the beginning, and so skip over them. The
2199 // primary case for this is two hidden parameters
2200 // passed into Enum constructors.
2201 int skip = Code.width(jvmType.getParameterTypes())
2202 - Code.width(sym.type.getParameterTypes());
2203 firstParam += skip;
2204 }
2205 }
2206 List<Name> paramNames = List.nil();
2207 int index = firstParam;
2208 for (Type t: sym.type.getParameterTypes()) {
2209 int nameIdx = (index < parameterNameIndices.length
2210 ? parameterNameIndices[index] : 0);
2211 Name name = nameIdx == 0 ? names.empty : readName(nameIdx);
2212 paramNames = paramNames.prepend(name);
2213 index += Code.width(t);
2214 }
2215 sym.savedParameterNames = paramNames.reverse();
2216 }
2217
2218 /**
2219 * skip n bytes
2220 */
2221 void skipBytes(int n) {
2222 bp = bp + n;
2223 }
2224
2225 /** Skip a field or method
2226 */
2227 void skipMember() {
2228 bp = bp + 6;
2229 char ac = nextChar();
2230 for (int i = 0; i < ac; i++) {
2231 bp = bp + 2;
2232 int attrLen = nextInt();
2233 bp = bp + attrLen;
2234 }
2235 }
2236
2237 /** Enter type variables of this classtype and all enclosing ones in
2238 * `typevars'.
2239 */
2240 protected void enterTypevars(Type t) {
2241 if (t.getEnclosingType() != null && t.getEnclosingType().hasTag(CLASS))
2242 enterTypevars(t.getEnclosingType());
2243 for (List<Type> xs = t.getTypeArguments(); xs.nonEmpty(); xs = xs.tail)
2244 typevars.enter(xs.head.tsym);
2245 }
2246
2247 protected void enterTypevars(Symbol sym) {
2248 if (sym.owner.kind == MTH) {
2249 enterTypevars(sym.owner);
2250 enterTypevars(sym.owner.owner);
2251 }
2252 enterTypevars(sym.type);
2253 }
2254
2255 /** Read contents of a given class symbol `c'. Both external and internal
2256 * versions of an inner class are read.
2257 */
2258 void readClass(ClassSymbol c) {
2259 ClassType ct = (ClassType)c.type;
2260
2261 // allocate scope for members
2262 c.members_field = new Scope(c);
2263
2264 // prepare type variable table
2265 typevars = typevars.dup(currentOwner);
2266 if (ct.getEnclosingType().hasTag(CLASS))
2267 enterTypevars(ct.getEnclosingType());
2268
2269 // read flags, or skip if this is an inner class
2270 long flags = adjustClassFlags(nextChar());
2271 if (c.owner.kind == PCK) c.flags_field = flags;
2272
2273 // read own class name and check that it matches
2274 ClassSymbol self = readClassSymbol(nextChar());
2275 if (c != self)
2276 throw badClassFile("class.file.wrong.class",
2277 self.flatname);
2278
2279 // class attributes must be read before class
2280 // skip ahead to read class attributes
2281 int startbp = bp;
2282 nextChar();
2283 char interfaceCount = nextChar();
2284 bp += interfaceCount * 2;
2285 char fieldCount = nextChar();
2286 for (int i = 0; i < fieldCount; i++) skipMember();
2287 char methodCount = nextChar();
2288 for (int i = 0; i < methodCount; i++) skipMember();
2289 readClassAttrs(c);
2290
2291 if (readAllOfClassFile) {
2292 for (int i = 1; i < poolObj.length; i++) readPool(i);
2293 c.pool = new Pool(poolObj.length, poolObj, types);
2294 }
2295
2296 // reset and read rest of classinfo
2297 bp = startbp;
2298 int n = nextChar();
2299 if (ct.supertype_field == null)
2300 ct.supertype_field = (n == 0)
2301 ? Type.noType
2302 : readClassSymbol(n).erasure(types);
2303 n = nextChar();
2304 List<Type> is = List.nil();
2305 for (int i = 0; i < n; i++) {
2306 Type _inter = readClassSymbol(nextChar()).erasure(types);
2307 is = is.prepend(_inter);
2308 }
2309 if (ct.interfaces_field == null)
2310 ct.interfaces_field = is.reverse();
2311
2312 Assert.check(fieldCount == nextChar());
2313 for (int i = 0; i < fieldCount; i++) enterMember(c, readField());
2314 Assert.check(methodCount == nextChar());
2315 for (int i = 0; i < methodCount; i++) enterMember(c, readMethod());
2316
2317 typevars = typevars.leave();
2318 }
2319
2320 /** Read inner class info. For each inner/outer pair allocate a
2321 * member class.
2322 */
2323 void readInnerClasses(ClassSymbol c) {
2324 int n = nextChar();
2325 for (int i = 0; i < n; i++) {
2326 nextChar(); // skip inner class symbol
2327 ClassSymbol outer = readClassSymbol(nextChar());
2328 Name name = readName(nextChar());
2329 if (name == null) name = names.empty;
2330 long flags = adjustClassFlags(nextChar());
2331 if (outer != null) { // we have a member class
2332 if (name == names.empty)
2333 name = names.one;
2334 ClassSymbol member = syms.enterClass(name, outer);
2335 if ((flags & STATIC) == 0) {
2336 ((ClassType)member.type).setEnclosingType(outer.type);
2337 if (member.erasure_field != null)
2338 ((ClassType)member.erasure_field).setEnclosingType(types.erasure(outer.type));
2339 }
2340 if (c == outer) {
2341 member.flags_field = flags;
2342 enterMember(c, member);
2343 }
2344 }
2345 }
2346 }
2347
2348 /** Read a class file.
2349 */
2350 private void readClassFile(ClassSymbol c) throws IOException {
2351 int magic = nextInt();
2352 if (magic != JAVA_MAGIC)
2353 throw badClassFile("illegal.start.of.class.file");
2354
2355 minorVersion = nextChar();
2356 majorVersion = nextChar();
2357 int maxMajor = Target.MAX().majorVersion;
2358 int maxMinor = Target.MAX().minorVersion;
2359 if (majorVersion > maxMajor ||
2360 majorVersion * 1000 + minorVersion <
2361 Target.MIN().majorVersion * 1000 + Target.MIN().minorVersion)
2362 {
2363 if (majorVersion == (maxMajor + 1))
2364 log.warning("big.major.version",
2365 currentClassFile,
2366 majorVersion,
2367 maxMajor);
2368 else
2369 throw badClassFile("wrong.version",
2370 Integer.toString(majorVersion),
2371 Integer.toString(minorVersion),
2372 Integer.toString(maxMajor),
2373 Integer.toString(maxMinor));
2374 }
2375 else if (checkClassFile &&
2376 majorVersion == maxMajor &&
2377 minorVersion > maxMinor)
2378 {
2379 printCCF("found.later.version",
2380 Integer.toString(minorVersion));
2381 }
2382 indexPool();
2383 if (signatureBuffer.length < bp) {
2384 int ns = Integer.highestOneBit(bp) << 1;
2385 signatureBuffer = new byte[ns];
2386 }
2387 readClass(c);
2388 }
2389
2390 /************************************************************************
2391 * Adjusting flags
2392 ***********************************************************************/
2393
2394 long adjustFieldFlags(long flags) {
2395 return flags;
2396 }
2397 long adjustMethodFlags(long flags) {
2398 if ((flags & ACC_BRIDGE) != 0) {
2399 flags &= ~ACC_BRIDGE;
2400 flags |= BRIDGE;
2401 if (!allowGenerics)
2402 flags &= ~SYNTHETIC;
2403 }
2404 if ((flags & ACC_VARARGS) != 0) {
2405 flags &= ~ACC_VARARGS;
2406 flags |= VARARGS;
2407 }
2408 return flags;
2409 }
2410 long adjustClassFlags(long flags) {
2411 return flags & ~ACC_SUPER; // SUPER and SYNCHRONIZED bits overloaded
2412 }
2413
2414 /************************************************************************
2415 * Loading Classes
2416 ***********************************************************************/
2417
2418 /** Completion for classes to be loaded. Before a class is loaded
2419 * we make sure its enclosing class (if any) is loaded.
2420 */
2421 private void complete(Symbol sym) throws CompletionFailure {
2422 if (sym.kind == TYP) {
2423 ClassSymbol c = (ClassSymbol)sym;
2424 c.members_field = new Scope.ErrorScope(c); // make sure it's always defined
2425 annotate.enterStart();
2426 try {
2427 completeOwners(c.owner);
2428 completeEnclosing(c);
2429 } finally {
2430 // The flush needs to happen only after annotations
2431 // are filled in.
2432 annotate.enterDoneWithoutFlush();
2433 }
2434 fillIn(c);
2435 } else if (sym.kind == PCK) {
2436 PackageSymbol p = (PackageSymbol)sym;
2437 try {
2438 fillIn(p);
2439 } catch (IOException ex) {
2440 throw new CompletionFailure(sym, ex.getLocalizedMessage()).initCause(ex);
2441 }
2442 }
2443 if (!filling)
2444 annotate.flush(); // finish attaching annotations
2445 }
2446
2447 /** complete up through the enclosing package. */
2448 private void completeOwners(Symbol o) {
2449 if (o.kind != PCK) completeOwners(o.owner);
2450 o.complete();
2451 }
2452
2453 /**
2454 * Tries to complete lexically enclosing classes if c looks like a
2455 * nested class. This is similar to completeOwners but handles
2456 * the situation when a nested class is accessed directly as it is
2457 * possible with the Tree API or javax.lang.model.*.
2458 */
2459 private void completeEnclosing(ClassSymbol c) {
2460 if (c.owner.kind == PCK) {
2461 Symbol owner = c.owner;
2462 for (Name name : Convert.enclosingCandidates(Convert.shortName(c.name))) {
2463 Symbol encl = owner.members().lookup(name).sym;
2464 if (encl == null)
2465 encl = syms.classes.get(TypeSymbol.formFlatName(name, owner));
2466 if (encl != null)
2467 encl.complete();
2468 }
2469 }
2470 }
2471
2472 /** We can only read a single class file at a time; this
2473 * flag keeps track of when we are currently reading a class
2474 * file.
2475 */
2476 private boolean filling = false;
2477
2478 /** Fill in definition of class `c' from corresponding class or
2479 * source file.
2480 */
2481 private void fillIn(ClassSymbol c) {
2482 if (completionFailureName == c.fullname) {
2483 throw new CompletionFailure(c, "user-selected completion failure by class name");
2484 }
2485 currentOwner = c;
2486 warnedAttrs.clear();
2487 JavaFileObject classfile = c.classfile;
2488 if (classfile != null) {
2489 JavaFileObject previousClassFile = currentClassFile;
2490 try {
2491 if (filling) {
2492 Assert.error("Filling " + classfile.toUri() + " during " + previousClassFile);
2493 }
2494 currentClassFile = classfile;
2495 if (verbose) {
2496 log.printVerbose("loading", currentClassFile.toString());
2497 }
2498 if (classfile.getKind() == JavaFileObject.Kind.CLASS) {
2499 filling = true;
2500 try {
2501 bp = 0;
2502 buf = readInputStream(buf, classfile.openInputStream());
2503 readClassFile(c);
2504 if (!missingTypeVariables.isEmpty() && !foundTypeVariables.isEmpty()) {
2505 List<Type> missing = missingTypeVariables;
2506 List<Type> found = foundTypeVariables;
2507 missingTypeVariables = List.nil();
2508 foundTypeVariables = List.nil();
2509 filling = false;
2510 ClassType ct = (ClassType)currentOwner.type;
2511 ct.supertype_field =
2512 types.subst(ct.supertype_field, missing, found);
2513 ct.interfaces_field =
2514 types.subst(ct.interfaces_field, missing, found);
2515 } else if (missingTypeVariables.isEmpty() !=
2516 foundTypeVariables.isEmpty()) {
2517 Name name = missingTypeVariables.head.tsym.name;
2518 throw badClassFile("undecl.type.var", name);
2519 }
2520 } finally {
2521 missingTypeVariables = List.nil();
2522 foundTypeVariables = List.nil();
2523 filling = false;
2524 }
2525 } else {
2526 if (sourceCompleter != null) {
2527 sourceCompleter.complete(c);
2528 } else {
2529 throw new IllegalStateException("Source completer required to read "
2530 + classfile.toUri());
2531 }
2532 }
2533 return;
2534 } catch (IOException ex) {
2535 throw badClassFile("unable.to.access.file", ex.getMessage());
2536 } catch (ArrayIndexOutOfBoundsException ex) {
2537 throw badClassFile("bad.class.file", c.flatname);
2538 } finally {
2539 currentClassFile = previousClassFile;
2540 }
2541 } else {
2542 JCDiagnostic diag =
2543 diagFactory.fragment("class.file.not.found", c.flatname);
2544 throw
2545 newCompletionFailure(c, diag);
2546 }
2547 }
2548 // where
2549 private static byte[] readInputStream(byte[] buf, InputStream s) throws IOException {
2550 try {
2551 buf = ensureCapacity(buf, s.available());
2552 int r = s.read(buf);
2553 int bp = 0;
2554 while (r != -1) {
2555 bp += r;
2556 buf = ensureCapacity(buf, bp);
2557 r = s.read(buf, bp, buf.length - bp);
2558 }
2559 return buf;
2560 } finally {
2561 try {
2562 s.close();
2563 } catch (IOException e) {
2564 /* Ignore any errors, as this stream may have already
2565 * thrown a related exception which is the one that
2566 * should be reported.
2567 */
2568 }
2569 }
2570 }
2571 /*
2572 * ensureCapacity will increase the buffer as needed, taking note that
2573 * the new buffer will always be greater than the needed and never
2574 * exactly equal to the needed size or bp. If equal then the read (above)
2575 * will infinitely loop as buf.length - bp == 0.
2576 */
2577 private static byte[] ensureCapacity(byte[] buf, int needed) {
2578 if (buf.length <= needed) {
2579 byte[] old = buf;
2580 buf = new byte[Integer.highestOneBit(needed) << 1];
2581 System.arraycopy(old, 0, buf, 0, old.length);
2582 }
2583 return buf;
2584 }
2585 /** Static factory for CompletionFailure objects.
2586 * In practice, only one can be used at a time, so we share one
2587 * to reduce the expense of allocating new exception objects.
2588 */
2589 private CompletionFailure newCompletionFailure(TypeSymbol c,
2590 JCDiagnostic diag) {
2591 if (!cacheCompletionFailure) {
2592 // log.warning("proc.messager",
2593 // Log.getLocalizedString("class.file.not.found", c.flatname));
2594 // c.debug.printStackTrace();
2595 return new CompletionFailure(c, diag);
2596 } else {
2597 CompletionFailure result = cachedCompletionFailure;
2598 result.sym = c;
2599 result.diag = diag;
2600 return result;
2601 }
2602 }
2603 private CompletionFailure cachedCompletionFailure =
2604 new CompletionFailure(null, (JCDiagnostic) null);
2605 {
2606 cachedCompletionFailure.setStackTrace(new StackTraceElement[0]);
2607 }
2608
2609
2610 /** Load a toplevel class with given fully qualified name
2611 * The class is entered into `classes' only if load was successful.
2612 */
2613 public ClassSymbol loadClass(Name flatname) throws CompletionFailure {
2614 boolean absent = syms.classes.get(flatname) == null;
2615 ClassSymbol c = syms.enterClass(flatname);
2616 if (c.members_field == null && c.completer != null) {
2617 try {
2618 c.complete();
2619 } catch (CompletionFailure ex) {
2620 if (absent) syms.classes.remove(flatname);
2621 throw ex;
2622 }
2623 }
2624 return c;
2625 }
2626
2627 /************************************************************************
2628 * Loading Packages
2629 ***********************************************************************/
2630
2631 /** Include class corresponding to given class file in package,
2632 * unless (1) we already have one the same kind (.class or .java), or
2633 * (2) we have one of the other kind, and the given class file
2634 * is older.
2635 */
2636 protected void includeClassFile(PackageSymbol p, JavaFileObject file) {
2637 if ((p.flags_field & EXISTS) == 0)
2638 for (Symbol q = p; q != null && q.kind == PCK; q = q.owner)
2639 q.flags_field |= EXISTS;
2640 JavaFileObject.Kind kind = file.getKind();
2641 int seen;
2642 if (kind == JavaFileObject.Kind.CLASS)
2643 seen = CLASS_SEEN;
2644 else
2645 seen = SOURCE_SEEN;
2646 String binaryName = fileManager.inferBinaryName(currentLoc, file);
2647 int lastDot = binaryName.lastIndexOf(".");
2648 Name classname = names.fromString(binaryName.substring(lastDot + 1));
2649 boolean isPkgInfo = classname == names.package_info;
2650 ClassSymbol c = isPkgInfo
2651 ? p.package_info
2652 : (ClassSymbol) p.members_field.lookup(classname).sym;
2653 if (c == null) {
2654 c = syms.enterClass(classname, p);
2655 if (c.classfile == null) // only update the file if's it's newly created
2656 c.classfile = file;
2657 if (isPkgInfo) {
2658 p.package_info = c;
2659 } else {
2660 if (c.owner == p) // it might be an inner class
2661 p.members_field.enter(c);
2662 }
2663 } else if (!preferCurrent && c.classfile != null && (c.flags_field & seen) == 0) {
2664 // if c.classfile == null, we are currently compiling this class
2665 // and no further action is necessary.
2666 // if (c.flags_field & seen) != 0, we have already encountered
2667 // a file of the same kind; again no further action is necessary.
2668 if ((c.flags_field & (CLASS_SEEN | SOURCE_SEEN)) != 0)
2669 c.classfile = preferredFileObject(file, c.classfile);
2670 }
2671 c.flags_field |= seen;
2672 }
2673
2674 /** Implement policy to choose to derive information from a source
2675 * file or a class file when both are present. May be overridden
2676 * by subclasses.
2677 */
2678 protected JavaFileObject preferredFileObject(JavaFileObject a,
2679 JavaFileObject b) {
2680
2681 if (preferSource)
2682 return (a.getKind() == JavaFileObject.Kind.SOURCE) ? a : b;
2683 else {
2684 long adate = a.getLastModified();
2685 long bdate = b.getLastModified();
2686 // 6449326: policy for bad lastModifiedTime in ClassReader
2687 //assert adate >= 0 && bdate >= 0;
2688 return (adate > bdate) ? a : b;
2689 }
2690 }
2691
2692 /**
2693 * specifies types of files to be read when filling in a package symbol
2694 */
2695 protected EnumSet<JavaFileObject.Kind> getPackageFileKinds() {
2696 return EnumSet.of(JavaFileObject.Kind.CLASS, JavaFileObject.Kind.SOURCE);
2697 }
2698
2699 /**
2700 * this is used to support javadoc
2701 */
2702 protected void extraFileActions(PackageSymbol pack, JavaFileObject fe) {
2703 }
2704
2705 protected Location currentLoc; // FIXME
2706
2707 private boolean verbosePath = true;
2708
2709 // Set to true when the currently selected file should be kept
2710 private boolean preferCurrent;
2711
2712 /** Load directory of package into members scope.
2713 */
2714 private void fillIn(PackageSymbol p) throws IOException {
2715 if (p.members_field == null)
2716 p.members_field = new Scope(p);
2717
2718 preferCurrent = false;
2719 if (userPathsFirst) {
2720 scanUserPaths(p);
2721 preferCurrent = true;
2722 scanPlatformPath(p);
2723 } else {
2724 scanPlatformPath(p);
2725 scanUserPaths(p);
2726 }
2727 verbosePath = false;
2728 }
2729
2730 /**
2731 * Scans class path and source path for files in given package.
2732 */
2733 private void scanUserPaths(PackageSymbol p) throws IOException {
2734 Set<JavaFileObject.Kind> kinds = getPackageFileKinds();
2735
2736 Set<JavaFileObject.Kind> classKinds = EnumSet.copyOf(kinds);
2737 classKinds.remove(JavaFileObject.Kind.SOURCE);
2738 boolean wantClassFiles = !classKinds.isEmpty();
2739
2740 Set<JavaFileObject.Kind> sourceKinds = EnumSet.copyOf(kinds);
2741 sourceKinds.remove(JavaFileObject.Kind.CLASS);
2742 boolean wantSourceFiles = !sourceKinds.isEmpty();
2743
2744 boolean haveSourcePath = fileManager.hasLocation(SOURCE_PATH);
2745
2746 if (verbose && verbosePath) {
2747 if (fileManager instanceof StandardJavaFileManager) {
2748 StandardJavaFileManager fm = (StandardJavaFileManager)fileManager;
2749 if (haveSourcePath && wantSourceFiles) {
2750 List<File> path = List.nil();
2751 for (File file : fm.getLocation(SOURCE_PATH)) {
2752 path = path.prepend(file);
2753 }
2754 log.printVerbose("sourcepath", path.reverse().toString());
2755 } else if (wantSourceFiles) {
2756 List<File> path = List.nil();
2757 for (File file : fm.getLocation(CLASS_PATH)) {
2758 path = path.prepend(file);
2759 }
2760 log.printVerbose("sourcepath", path.reverse().toString());
2761 }
2762 if (wantClassFiles) {
2763 List<File> path = List.nil();
2764 for (File file : fm.getLocation(PLATFORM_CLASS_PATH)) {
2765 path = path.prepend(file);
2766 }
2767 for (File file : fm.getLocation(CLASS_PATH)) {
2768 path = path.prepend(file);
2769 }
2770 log.printVerbose("classpath", path.reverse().toString());
2771 }
2772 }
2773 }
2774
2775 String packageName = p.fullname.toString();
2776 if (wantSourceFiles && !haveSourcePath) {
2777 fillIn(p, CLASS_PATH,
2778 fileManager.list(CLASS_PATH,
2779 packageName,
2780 kinds,
2781 false));
2782 } else {
2783 if (wantClassFiles)
2784 fillIn(p, CLASS_PATH,
2785 fileManager.list(CLASS_PATH,
2786 packageName,
2787 classKinds,
2788 false));
2789 if (wantSourceFiles)
2790 fillIn(p, SOURCE_PATH,
2791 fileManager.list(SOURCE_PATH,
2792 packageName,
2793 sourceKinds,
2794 false));
2795 }
2796 }
2797
2798 /**
2799 * Scans platform class path for files in given package.
2800 */
2801 private void scanPlatformPath(PackageSymbol p) throws IOException {
2802 fillIn(p, PLATFORM_CLASS_PATH,
2803 fileManager.list(PLATFORM_CLASS_PATH,
2804 p.fullname.toString(),
2805 EnumSet.of(JavaFileObject.Kind.CLASS),
2806 false));
2807 }
2808 // where
2809 private void fillIn(PackageSymbol p,
2810 Location location,
2811 Iterable<JavaFileObject> files)
2812 {
2813 currentLoc = location;
2814 for (JavaFileObject fo : files) {
2815 switch (fo.getKind()) {
2816 case CLASS:
2817 case SOURCE: {
2818 // TODO pass binaryName to includeClassFile
2819 String binaryName = fileManager.inferBinaryName(currentLoc, fo);
2820 String simpleName = binaryName.substring(binaryName.lastIndexOf(".") + 1);
2821 if (SourceVersion.isIdentifier(simpleName) ||
2822 simpleName.equals("package-info"))
2823 includeClassFile(p, fo);
2824 break;
2825 }
2826 default:
2827 extraFileActions(p, fo);
2828 }
2829 }
2830 }
2831
2832 /** Output for "-checkclassfile" option.
2833 * @param key The key to look up the correct internationalized string.
2834 * @param arg An argument for substitution into the output string.
2835 */
2836 private void printCCF(String key, Object arg) {
2837 log.printLines(key, arg);
2838 }
2839
2840
2841 public interface SourceCompleter {
2842 void complete(ClassSymbol sym)
2843 throws CompletionFailure;
2844 }
2845
2846 /**
2847 * A subclass of JavaFileObject for the sourcefile attribute found in a classfile.
2848 * The attribute is only the last component of the original filename, so is unlikely
2849 * to be valid as is, so operations other than those to access the name throw
2850 * UnsupportedOperationException
2851 */
2852 private static class SourceFileObject extends BaseFileObject {
2853
2854 /** The file's name.
2855 */
2856 private Name name;
2857 private Name flatname;
2858
2859 public SourceFileObject(Name name, Name flatname) {
2860 super(null); // no file manager; never referenced for this file object
2861 this.name = name;
2862 this.flatname = flatname;
2863 }
2864
2865 @Override
2866 public URI toUri() {
2867 try {
2868 return new URI(null, name.toString(), null);
2869 } catch (URISyntaxException e) {
2870 throw new CannotCreateUriError(name.toString(), e);
2871 }
2872 }
2873
2874 @Override
2875 public String getName() {
2876 return name.toString();
2877 }
2878
2879 @Override
2880 public String getShortName() {
2881 return getName();
2882 }
2883
2884 @Override
2885 public JavaFileObject.Kind getKind() {
2886 return getKind(getName());
2887 }
2888
2889 @Override
2890 public InputStream openInputStream() {
2891 throw new UnsupportedOperationException();
2892 }
2893
2894 @Override
2895 public OutputStream openOutputStream() {
2896 throw new UnsupportedOperationException();
2897 }
2898
2899 @Override
2900 public CharBuffer getCharContent(boolean ignoreEncodingErrors) {
2901 throw new UnsupportedOperationException();
2902 }
2903
2904 @Override
2905 public Reader openReader(boolean ignoreEncodingErrors) {
2906 throw new UnsupportedOperationException();
2907 }
2908
2909 @Override
2910 public Writer openWriter() {
2911 throw new UnsupportedOperationException();
2912 }
2913
2914 @Override
2915 public long getLastModified() {
2916 throw new UnsupportedOperationException();
2917 }
2918
2919 @Override
2920 public boolean delete() {
2921 throw new UnsupportedOperationException();
2922 }
2923
2924 @Override
2925 protected String inferBinaryName(Iterable<? extends File> path) {
2926 return flatname.toString();
2927 }
2928
2929 @Override
2930 public boolean isNameCompatible(String simpleName, JavaFileObject.Kind kind) {
2931 return true; // fail-safe mode
2932 }
2933
2934 /**
2935 * Check if two file objects are equal.
2936 * SourceFileObjects are just placeholder objects for the value of a
2937 * SourceFile attribute, and do not directly represent specific files.
2938 * Two SourceFileObjects are equal if their names are equal.
2939 */
2940 @Override
2941 public boolean equals(Object other) {
2942 if (this == other)
2943 return true;
2944
2945 if (!(other instanceof SourceFileObject))
2946 return false;
2947
2948 SourceFileObject o = (SourceFileObject) other;
2949 return name.equals(o.name);
2950 }
2951
2952 @Override
2953 public int hashCode() {
2954 return name.hashCode();
2955 }
2956 }
2957 }