1 | /* |
2 | * Copyright 1999-2006 Sun Microsystems, Inc. All Rights Reserved. |
3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 | * |
5 | * This code is free software; you can redistribute it and/or modify it |
6 | * under the terms of the GNU General Public License version 2 only, as |
7 | * published by the Free Software Foundation. Sun designates this |
8 | * particular file as subject to the "Classpath" exception as provided |
9 | * by Sun in the LICENSE file that accompanied this code. |
10 | * |
11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
14 | * version 2 for more details (a copy is included in the LICENSE file that |
15 | * accompanied this code). |
16 | * |
17 | * You should have received a copy of the GNU General Public License version |
18 | * 2 along with this work; if not, write to the Free Software Foundation, |
19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
20 | * |
21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
23 | * have any questions. |
24 | */ |
25 | |
26 | package com.sun.tools.javac.jvm; |
27 | |
28 | import java.io.*; |
29 | import java.net.URI; |
30 | import java.nio.CharBuffer; |
31 | import java.util.EnumSet; |
32 | import java.util.HashMap; |
33 | import java.util.Map; |
34 | import java.util.Set; |
35 | import javax.lang.model.SourceVersion; |
36 | import javax.tools.JavaFileObject; |
37 | import javax.tools.JavaFileManager; |
38 | import javax.tools.StandardJavaFileManager; |
39 | |
40 | import com.sun.tools.javac.comp.Annotate; |
41 | import com.sun.tools.javac.code.*; |
42 | import com.sun.tools.javac.code.Type.*; |
43 | import com.sun.tools.javac.code.Symbol.*; |
44 | import com.sun.tools.javac.code.Symtab; |
45 | import com.sun.tools.javac.util.*; |
46 | import com.sun.tools.javac.util.List; |
47 | |
48 | import static com.sun.tools.javac.code.Flags.*; |
49 | import static com.sun.tools.javac.code.Kinds.*; |
50 | import static com.sun.tools.javac.code.TypeTags.*; |
51 | import com.sun.tools.javac.jvm.ClassFile.NameAndType; |
52 | import javax.tools.JavaFileManager.Location; |
53 | import static javax.tools.StandardLocation.*; |
54 | |
55 | /** This class provides operations to read a classfile into an internal |
56 | * representation. The internal representation is anchored in a |
57 | * ClassSymbol which contains in its scope symbol representations |
58 | * for all other definitions in the classfile. Top-level Classes themselves |
59 | * appear as members of the scopes of PackageSymbols. |
60 | * |
61 | * <p><b>This is NOT part of any API supported by Sun Microsystems. If |
62 | * you write code that depends on this, you do so at your own risk. |
63 | * This code and its internal interfaces are subject to change or |
64 | * deletion without notice.</b> |
65 | */ |
66 | public class ClassReader extends ClassFile implements Completer { |
67 | /** The context key for the class reader. */ |
68 | protected static final Context.Key<ClassReader> classReaderKey = |
69 | new Context.Key<ClassReader>(); |
70 | |
71 | Annotate annotate; |
72 | |
73 | /** Switch: verbose output. |
74 | */ |
75 | boolean verbose; |
76 | |
77 | /** Switch: check class file for correct minor version, unrecognized |
78 | * attributes. |
79 | */ |
80 | boolean checkClassFile; |
81 | |
82 | /** Switch: read constant pool and code sections. This switch is initially |
83 | * set to false but can be turned on from outside. |
84 | */ |
85 | public boolean readAllOfClassFile = false; |
86 | |
87 | /** Switch: read GJ signature information. |
88 | */ |
89 | boolean allowGenerics; |
90 | |
91 | /** Switch: read varargs attribute. |
92 | */ |
93 | boolean allowVarargs; |
94 | |
95 | /** Switch: allow annotations. |
96 | */ |
97 | boolean allowAnnotations; |
98 | |
99 | /** Switch: preserve parameter names from the variable table. |
100 | */ |
101 | public boolean saveParameterNames; |
102 | |
103 | /** |
104 | * Switch: cache completion failures unless -XDdev is used |
105 | */ |
106 | private boolean cacheCompletionFailure; |
107 | |
108 | /** |
109 | * Switch: prefer source files instead of newer when both source |
110 | * and class are available |
111 | **/ |
112 | public boolean preferSource; |
113 | |
114 | /** The log to use for verbose output |
115 | */ |
116 | final Log log; |
117 | |
118 | /** The symbol table. */ |
119 | Symtab syms; |
120 | |
121 | Types types; |
122 | |
123 | /** The name table. */ |
124 | final Name.Table names; |
125 | |
126 | /** Force a completion failure on this name |
127 | */ |
128 | final Name completionFailureName; |
129 | |
130 | /** Access to files |
131 | */ |
132 | private final JavaFileManager fileManager; |
133 | |
134 | /** Can be reassigned from outside: |
135 | * the completer to be used for ".java" files. If this remains unassigned |
136 | * ".java" files will not be loaded. |
137 | */ |
138 | public SourceCompleter sourceCompleter = null; |
139 | |
140 | /** A hashtable containing the encountered top-level and member classes, |
141 | * indexed by flat names. The table does not contain local classes. |
142 | */ |
143 | private Map<Name,ClassSymbol> classes; |
144 | |
145 | /** A hashtable containing the encountered packages. |
146 | */ |
147 | private Map<Name, PackageSymbol> packages; |
148 | |
149 | /** The current scope where type variables are entered. |
150 | */ |
151 | protected Scope typevars; |
152 | |
153 | /** The path name of the class file currently being read. |
154 | */ |
155 | protected JavaFileObject currentClassFile = null; |
156 | |
157 | /** The class or method currently being read. |
158 | */ |
159 | protected Symbol currentOwner = null; |
160 | |
161 | /** The buffer containing the currently read class file. |
162 | */ |
163 | byte[] buf = new byte[0x0fff0]; |
164 | |
165 | /** The current input pointer. |
166 | */ |
167 | int bp; |
168 | |
169 | /** The objects of the constant pool. |
170 | */ |
171 | Object[] poolObj; |
172 | |
173 | /** For every constant pool entry, an index into buf where the |
174 | * defining section of the entry is found. |
175 | */ |
176 | int[] poolIdx; |
177 | |
178 | /** Get the ClassReader instance for this invocation. */ |
179 | public static ClassReader instance(Context context) { |
180 | ClassReader instance = context.get(classReaderKey); |
181 | if (instance == null) |
182 | instance = new ClassReader(context, true); |
183 | return instance; |
184 | } |
185 | |
186 | /** Initialize classes and packages, treating this as the definitive classreader. */ |
187 | public void init(Symtab syms) { |
188 | init(syms, true); |
189 | } |
190 | |
191 | /** Initialize classes and packages, optionally treating this as |
192 | * the definitive classreader. |
193 | */ |
194 | private void init(Symtab syms, boolean definitive) { |
195 | if (classes != null) return; |
196 | |
197 | if (definitive) { |
198 | assert packages == null || packages == syms.packages; |
199 | packages = syms.packages; |
200 | assert classes == null || classes == syms.classes; |
201 | classes = syms.classes; |
202 | } else { |
203 | packages = new HashMap<Name, PackageSymbol>(); |
204 | classes = new HashMap<Name, ClassSymbol>(); |
205 | } |
206 | |
207 | packages.put(names.empty, syms.rootPackage); |
208 | syms.rootPackage.completer = this; |
209 | syms.unnamedPackage.completer = this; |
210 | } |
211 | |
212 | /** Construct a new class reader, optionally treated as the |
213 | * definitive classreader for this invocation. |
214 | */ |
215 | protected ClassReader(Context context, boolean definitive) { |
216 | if (definitive) context.put(classReaderKey, this); |
217 | |
218 | names = Name.Table.instance(context); |
219 | syms = Symtab.instance(context); |
220 | types = Types.instance(context); |
221 | fileManager = context.get(JavaFileManager.class); |
222 | if (fileManager == null) |
223 | throw new AssertionError("FileManager initialization error"); |
224 | |
225 | init(syms, definitive); |
226 | log = Log.instance(context); |
227 | |
228 | Options options = Options.instance(context); |
229 | annotate = Annotate.instance(context); |
230 | verbose = options.get("-verbose") != null; |
231 | checkClassFile = options.get("-checkclassfile") != null; |
232 | Source source = Source.instance(context); |
233 | allowGenerics = source.allowGenerics(); |
234 | allowVarargs = source.allowVarargs(); |
235 | allowAnnotations = source.allowAnnotations(); |
236 | saveParameterNames = options.get("save-parameter-names") != null; |
237 | cacheCompletionFailure = options.get("dev") == null; |
238 | preferSource = "source".equals(options.get("-Xprefer")); |
239 | |
240 | completionFailureName = |
241 | (options.get("failcomplete") != null) |
242 | ? names.fromString(options.get("failcomplete")) |
243 | : null; |
244 | |
245 | typevars = new Scope(syms.noSymbol); |
246 | } |
247 | |
248 | /** Add member to class unless it is synthetic. |
249 | */ |
250 | private void enterMember(ClassSymbol c, Symbol sym) { |
251 | if ((sym.flags_field & (SYNTHETIC|BRIDGE)) != SYNTHETIC) |
252 | c.members_field.enter(sym); |
253 | } |
254 | |
255 | /************************************************************************ |
256 | * Error Diagnoses |
257 | ***********************************************************************/ |
258 | |
259 | public static class BadClassFile extends CompletionFailure { |
260 | private static final long serialVersionUID = 0; |
261 | |
262 | /** |
263 | * @param msg A localized message. |
264 | */ |
265 | public BadClassFile(ClassSymbol c, Object cname, Object msg) { |
266 | super(c, Log.getLocalizedString("bad.class.file.header", |
267 | cname, msg)); |
268 | } |
269 | } |
270 | |
271 | public BadClassFile badClassFile(String key, Object... args) { |
272 | return new BadClassFile ( |
273 | currentOwner.enclClass(), |
274 | currentClassFile, |
275 | Log.getLocalizedString(key, args)); |
276 | } |
277 | |
278 | /************************************************************************ |
279 | * Buffer Access |
280 | ***********************************************************************/ |
281 | |
282 | /** Read a character. |
283 | */ |
284 | char nextChar() { |
285 | return (char)(((buf[bp++] & 0xFF) << 8) + (buf[bp++] & 0xFF)); |
286 | } |
287 | |
288 | /** Read an integer. |
289 | */ |
290 | int nextInt() { |
291 | return |
292 | ((buf[bp++] & 0xFF) << 24) + |
293 | ((buf[bp++] & 0xFF) << 16) + |
294 | ((buf[bp++] & 0xFF) << 8) + |
295 | (buf[bp++] & 0xFF); |
296 | } |
297 | |
298 | /** Extract a character at position bp from buf. |
299 | */ |
300 | char getChar(int bp) { |
301 | return |
302 | (char)(((buf[bp] & 0xFF) << 8) + (buf[bp+1] & 0xFF)); |
303 | } |
304 | |
305 | /** Extract an integer at position bp from buf. |
306 | */ |
307 | int getInt(int bp) { |
308 | return |
309 | ((buf[bp] & 0xFF) << 24) + |
310 | ((buf[bp+1] & 0xFF) << 16) + |
311 | ((buf[bp+2] & 0xFF) << 8) + |
312 | (buf[bp+3] & 0xFF); |
313 | } |
314 | |
315 | |
316 | /** Extract a long integer at position bp from buf. |
317 | */ |
318 | long getLong(int bp) { |
319 | DataInputStream bufin = |
320 | new DataInputStream(new ByteArrayInputStream(buf, bp, 8)); |
321 | try { |
322 | return bufin.readLong(); |
323 | } catch (IOException e) { |
324 | throw new AssertionError(e); |
325 | } |
326 | } |
327 | |
328 | /** Extract a float at position bp from buf. |
329 | */ |
330 | float getFloat(int bp) { |
331 | DataInputStream bufin = |
332 | new DataInputStream(new ByteArrayInputStream(buf, bp, 4)); |
333 | try { |
334 | return bufin.readFloat(); |
335 | } catch (IOException e) { |
336 | throw new AssertionError(e); |
337 | } |
338 | } |
339 | |
340 | /** Extract a double at position bp from buf. |
341 | */ |
342 | double getDouble(int bp) { |
343 | DataInputStream bufin = |
344 | new DataInputStream(new ByteArrayInputStream(buf, bp, 8)); |
345 | try { |
346 | return bufin.readDouble(); |
347 | } catch (IOException e) { |
348 | throw new AssertionError(e); |
349 | } |
350 | } |
351 | |
352 | /************************************************************************ |
353 | * Constant Pool Access |
354 | ***********************************************************************/ |
355 | |
356 | /** Index all constant pool entries, writing their start addresses into |
357 | * poolIdx. |
358 | */ |
359 | void indexPool() { |
360 | poolIdx = new int[nextChar()]; |
361 | poolObj = new Object[poolIdx.length]; |
362 | int i = 1; |
363 | while (i < poolIdx.length) { |
364 | poolIdx[i++] = bp; |
365 | byte tag = buf[bp++]; |
366 | switch (tag) { |
367 | case CONSTANT_Utf8: case CONSTANT_Unicode: { |
368 | int len = nextChar(); |
369 | bp = bp + len; |
370 | break; |
371 | } |
372 | case CONSTANT_Class: |
373 | case CONSTANT_String: |
374 | bp = bp + 2; |
375 | break; |
376 | case CONSTANT_Fieldref: |
377 | case CONSTANT_Methodref: |
378 | case CONSTANT_InterfaceMethodref: |
379 | case CONSTANT_NameandType: |
380 | case CONSTANT_Integer: |
381 | case CONSTANT_Float: |
382 | bp = bp + 4; |
383 | break; |
384 | case CONSTANT_Long: |
385 | case CONSTANT_Double: |
386 | bp = bp + 8; |
387 | i++; |
388 | break; |
389 | default: |
390 | throw badClassFile("bad.const.pool.tag.at", |
391 | Byte.toString(tag), |
392 | Integer.toString(bp -1)); |
393 | } |
394 | } |
395 | } |
396 | |
397 | /** Read constant pool entry at start address i, use pool as a cache. |
398 | */ |
399 | Object readPool(int i) { |
400 | Object result = poolObj[i]; |
401 | if (result != null) return result; |
402 | |
403 | int index = poolIdx[i]; |
404 | if (index == 0) return null; |
405 | |
406 | byte tag = buf[index]; |
407 | switch (tag) { |
408 | case CONSTANT_Utf8: |
409 | poolObj[i] = names.fromUtf(buf, index + 3, getChar(index + 1)); |
410 | break; |
411 | case CONSTANT_Unicode: |
412 | throw badClassFile("unicode.str.not.supported"); |
413 | case CONSTANT_Class: |
414 | poolObj[i] = readClassOrType(getChar(index + 1)); |
415 | break; |
416 | case CONSTANT_String: |
417 | // FIXME: (footprint) do not use toString here |
418 | poolObj[i] = readName(getChar(index + 1)).toString(); |
419 | break; |
420 | case CONSTANT_Fieldref: { |
421 | ClassSymbol owner = readClassSymbol(getChar(index + 1)); |
422 | NameAndType nt = (NameAndType)readPool(getChar(index + 3)); |
423 | poolObj[i] = new VarSymbol(0, nt.name, nt.type, owner); |
424 | break; |
425 | } |
426 | case CONSTANT_Methodref: |
427 | case CONSTANT_InterfaceMethodref: { |
428 | ClassSymbol owner = readClassSymbol(getChar(index + 1)); |
429 | NameAndType nt = (NameAndType)readPool(getChar(index + 3)); |
430 | poolObj[i] = new MethodSymbol(0, nt.name, nt.type, owner); |
431 | break; |
432 | } |
433 | case CONSTANT_NameandType: |
434 | poolObj[i] = new NameAndType( |
435 | readName(getChar(index + 1)), |
436 | readType(getChar(index + 3))); |
437 | break; |
438 | case CONSTANT_Integer: |
439 | poolObj[i] = getInt(index + 1); |
440 | break; |
441 | case CONSTANT_Float: |
442 | poolObj[i] = new Float(getFloat(index + 1)); |
443 | break; |
444 | case CONSTANT_Long: |
445 | poolObj[i] = new Long(getLong(index + 1)); |
446 | break; |
447 | case CONSTANT_Double: |
448 | poolObj[i] = new Double(getDouble(index + 1)); |
449 | break; |
450 | default: |
451 | throw badClassFile("bad.const.pool.tag", Byte.toString(tag)); |
452 | } |
453 | return poolObj[i]; |
454 | } |
455 | |
456 | /** Read signature and convert to type. |
457 | */ |
458 | Type readType(int i) { |
459 | int index = poolIdx[i]; |
460 | return sigToType(buf, index + 3, getChar(index + 1)); |
461 | } |
462 | |
463 | /** If name is an array type or class signature, return the |
464 | * corresponding type; otherwise return a ClassSymbol with given name. |
465 | */ |
466 | Object readClassOrType(int i) { |
467 | int index = poolIdx[i]; |
468 | int len = getChar(index + 1); |
469 | int start = index + 3; |
470 | assert buf[start] == '[' || buf[start + len - 1] != ';'; |
471 | // by the above assertion, the following test can be |
472 | // simplified to (buf[start] == '[') |
473 | return (buf[start] == '[' || buf[start + len - 1] == ';') |
474 | ? (Object)sigToType(buf, start, len) |
475 | : (Object)enterClass(names.fromUtf(internalize(buf, start, |
476 | len))); |
477 | } |
478 | |
479 | /** Read signature and convert to type parameters. |
480 | */ |
481 | List<Type> readTypeParams(int i) { |
482 | int index = poolIdx[i]; |
483 | return sigToTypeParams(buf, index + 3, getChar(index + 1)); |
484 | } |
485 | |
486 | /** Read class entry. |
487 | */ |
488 | ClassSymbol readClassSymbol(int i) { |
489 | return (ClassSymbol) (readPool(i)); |
490 | } |
491 | |
492 | /** Read name. |
493 | */ |
494 | Name readName(int i) { |
495 | return (Name) (readPool(i)); |
496 | } |
497 | |
498 | /************************************************************************ |
499 | * Reading Types |
500 | ***********************************************************************/ |
501 | |
502 | /** The unread portion of the currently read type is |
503 | * signature[sigp..siglimit-1]. |
504 | */ |
505 | byte[] signature; |
506 | int sigp; |
507 | int siglimit; |
508 | boolean sigEnterPhase = false; |
509 | |
510 | /** Convert signature to type, where signature is a name. |
511 | */ |
512 | Type sigToType(Name sig) { |
513 | return sig == null |
514 | ? null |
515 | : sigToType(sig.table.names, sig.index, sig.len); |
516 | } |
517 | |
518 | /** Convert signature to type, where signature is a byte array segment. |
519 | */ |
520 | Type sigToType(byte[] sig, int offset, int len) { |
521 | signature = sig; |
522 | sigp = offset; |
523 | siglimit = offset + len; |
524 | return sigToType(); |
525 | } |
526 | |
527 | /** Convert signature to type, where signature is implicit. |
528 | */ |
529 | Type sigToType() { |
530 | switch ((char) signature[sigp]) { |
531 | case 'T': |
532 | sigp++; |
533 | int start = sigp; |
534 | while (signature[sigp] != ';') sigp++; |
535 | sigp++; |
536 | return sigEnterPhase |
537 | ? Type.noType |
538 | : findTypeVar(names.fromUtf(signature, start, sigp - 1 - start)); |
539 | case '+': { |
540 | sigp++; |
541 | Type t = sigToType(); |
542 | return new WildcardType(t, BoundKind.EXTENDS, |
543 | syms.boundClass); |
544 | } |
545 | case '*': |
546 | sigp++; |
547 | return new WildcardType(syms.objectType, BoundKind.UNBOUND, |
548 | syms.boundClass); |
549 | case '-': { |
550 | sigp++; |
551 | Type t = sigToType(); |
552 | return new WildcardType(t, BoundKind.SUPER, |
553 | syms.boundClass); |
554 | } |
555 | case 'B': |
556 | sigp++; |
557 | return syms.byteType; |
558 | case 'C': |
559 | sigp++; |
560 | return syms.charType; |
561 | case 'D': |
562 | sigp++; |
563 | return syms.doubleType; |
564 | case 'F': |
565 | sigp++; |
566 | return syms.floatType; |
567 | case 'I': |
568 | sigp++; |
569 | return syms.intType; |
570 | case 'J': |
571 | sigp++; |
572 | return syms.longType; |
573 | case 'L': |
574 | { |
575 | // int oldsigp = sigp; |
576 | Type t = classSigToType(); |
577 | if (sigp < siglimit && signature[sigp] == '.') |
578 | throw badClassFile("deprecated inner class signature syntax " + |
579 | "(please recompile from source)"); |
580 | /* |
581 | System.err.println(" decoded " + |
582 | new String(signature, oldsigp, sigp-oldsigp) + |
583 | " => " + t + " outer " + t.outer()); |
584 | */ |
585 | return t; |
586 | } |
587 | case 'S': |
588 | sigp++; |
589 | return syms.shortType; |
590 | case 'V': |
591 | sigp++; |
592 | return syms.voidType; |
593 | case 'Z': |
594 | sigp++; |
595 | return syms.booleanType; |
596 | case '[': |
597 | sigp++; |
598 | return new ArrayType(sigToType(), syms.arrayClass); |
599 | case '(': |
600 | sigp++; |
601 | List<Type> argtypes = sigToTypes(')'); |
602 | Type restype = sigToType(); |
603 | List<Type> thrown = List.nil(); |
604 | while (signature[sigp] == '^') { |
605 | sigp++; |
606 | thrown = thrown.prepend(sigToType()); |
607 | } |
608 | return new MethodType(argtypes, |
609 | restype, |
610 | thrown.reverse(), |
611 | syms.methodClass); |
612 | case '<': |
613 | typevars = typevars.dup(currentOwner); |
614 | Type poly = new ForAll(sigToTypeParams(), sigToType()); |
615 | typevars = typevars.leave(); |
616 | return poly; |
617 | default: |
618 | throw badClassFile("bad.signature", |
619 | Convert.utf2string(signature, sigp, 10)); |
620 | } |
621 | } |
622 | |
623 | byte[] signatureBuffer = new byte[0]; |
624 | int sbp = 0; |
625 | /** Convert class signature to type, where signature is implicit. |
626 | */ |
627 | Type classSigToType() { |
628 | if (signature[sigp] != 'L') |
629 | throw badClassFile("bad.class.signature", |
630 | Convert.utf2string(signature, sigp, 10)); |
631 | sigp++; |
632 | Type outer = Type.noType; |
633 | int startSbp = sbp; |
634 | |
635 | while (true) { |
636 | final byte c = signature[sigp++]; |
637 | switch (c) { |
638 | |
639 | case ';': { // end |
640 | ClassSymbol t = enterClass(names.fromUtf(signatureBuffer, |
641 | startSbp, |
642 | sbp - startSbp)); |
643 | if (outer == Type.noType) |
644 | outer = t.erasure(types); |
645 | else |
646 | outer = new ClassType(outer, List.<Type>nil(), t); |
647 | sbp = startSbp; |
648 | return outer; |
649 | } |
650 | |
651 | case '<': // generic arguments |
652 | ClassSymbol t = enterClass(names.fromUtf(signatureBuffer, |
653 | startSbp, |
654 | sbp - startSbp)); |
655 | outer = new ClassType(outer, sigToTypes('>'), t) { |
656 | boolean completed = false; |
657 | public Type getEnclosingType() { |
658 | if (!completed) { |
659 | completed = true; |
660 | tsym.complete(); |
661 | Type enclosingType = tsym.type.getEnclosingType(); |
662 | if (enclosingType != Type.noType) { |
663 | List<Type> typeArgs = |
664 | super.getEnclosingType().allparams(); |
665 | List<Type> typeParams = |
666 | enclosingType.allparams(); |
667 | if (typeParams.length() != typeArgs.length()) { |
668 | // no "rare" types |
669 | super.setEnclosingType(types.erasure(enclosingType)); |
670 | } else { |
671 | super.setEnclosingType(types.subst(enclosingType, |
672 | typeParams, |
673 | typeArgs)); |
674 | } |
675 | } else { |
676 | super.setEnclosingType(Type.noType); |
677 | } |
678 | } |
679 | return super.getEnclosingType(); |
680 | } |
681 | public void setEnclosingType(Type outer) { |
682 | throw new UnsupportedOperationException(); |
683 | } |
684 | }; |
685 | switch (signature[sigp++]) { |
686 | case ';': |
687 | if (sigp < signature.length && signature[sigp] == '.') { |
688 | // support old-style GJC signatures |
689 | // The signature produced was |
690 | // Lfoo/Outer<Lfoo/X;>;.Lfoo/Outer$Inner<Lfoo/Y;>; |
691 | // rather than say |
692 | // Lfoo/Outer<Lfoo/X;>.Inner<Lfoo/Y;>; |
693 | // so we skip past ".Lfoo/Outer$" |
694 | sigp += (sbp - startSbp) + // "foo/Outer" |
695 | 3; // ".L" and "$" |
696 | signatureBuffer[sbp++] = (byte)'$'; |
697 | break; |
698 | } else { |
699 | sbp = startSbp; |
700 | return outer; |
701 | } |
702 | case '.': |
703 | signatureBuffer[sbp++] = (byte)'$'; |
704 | break; |
705 | default: |
706 | throw new AssertionError(signature[sigp-1]); |
707 | } |
708 | continue; |
709 | |
710 | case '.': |
711 | signatureBuffer[sbp++] = (byte)'$'; |
712 | continue; |
713 | case '/': |
714 | signatureBuffer[sbp++] = (byte)'.'; |
715 | continue; |
716 | default: |
717 | signatureBuffer[sbp++] = c; |
718 | continue; |
719 | } |
720 | } |
721 | } |
722 | |
723 | /** Convert (implicit) signature to list of types |
724 | * until `terminator' is encountered. |
725 | */ |
726 | List<Type> sigToTypes(char terminator) { |
727 | List<Type> head = List.of(null); |
728 | List<Type> tail = head; |
729 | while (signature[sigp] != terminator) |
730 | tail = tail.setTail(List.of(sigToType())); |
731 | sigp++; |
732 | return head.tail; |
733 | } |
734 | |
735 | /** Convert signature to type parameters, where signature is a name. |
736 | */ |
737 | List<Type> sigToTypeParams(Name name) { |
738 | return sigToTypeParams(name.table.names, name.index, name.len); |
739 | } |
740 | |
741 | /** Convert signature to type parameters, where signature is a byte |
742 | * array segment. |
743 | */ |
744 | List<Type> sigToTypeParams(byte[] sig, int offset, int len) { |
745 | signature = sig; |
746 | sigp = offset; |
747 | siglimit = offset + len; |
748 | return sigToTypeParams(); |
749 | } |
750 | |
751 | /** Convert signature to type parameters, where signature is implicit. |
752 | */ |
753 | List<Type> sigToTypeParams() { |
754 | List<Type> tvars = List.nil(); |
755 | if (signature[sigp] == '<') { |
756 | sigp++; |
757 | int start = sigp; |
758 | sigEnterPhase = true; |
759 | while (signature[sigp] != '>') |
760 | tvars = tvars.prepend(sigToTypeParam()); |
761 | sigEnterPhase = false; |
762 | sigp = start; |
763 | while (signature[sigp] != '>') |
764 | sigToTypeParam(); |
765 | sigp++; |
766 | } |
767 | return tvars.reverse(); |
768 | } |
769 | |
770 | /** Convert (implicit) signature to type parameter. |
771 | */ |
772 | Type sigToTypeParam() { |
773 | int start = sigp; |
774 | while (signature[sigp] != ':') sigp++; |
775 | Name name = names.fromUtf(signature, start, sigp - start); |
776 | TypeVar tvar; |
777 | if (sigEnterPhase) { |
778 | tvar = new TypeVar(name, currentOwner, syms.botType); |
779 | typevars.enter(tvar.tsym); |
780 | } else { |
781 | tvar = (TypeVar)findTypeVar(name); |
782 | } |
783 | List<Type> bounds = List.nil(); |
784 | Type st = null; |
785 | if (signature[sigp] == ':' && signature[sigp+1] == ':') { |
786 | sigp++; |
787 | st = syms.objectType; |
788 | } |
789 | while (signature[sigp] == ':') { |
790 | sigp++; |
791 | bounds = bounds.prepend(sigToType()); |
792 | } |
793 | if (!sigEnterPhase) { |
794 | types.setBounds(tvar, bounds.reverse(), st); |
795 | } |
796 | return tvar; |
797 | } |
798 | |
799 | /** Find type variable with given name in `typevars' scope. |
800 | */ |
801 | Type findTypeVar(Name name) { |
802 | Scope.Entry e = typevars.lookup(name); |
803 | if (e.scope != null) { |
804 | return e.sym.type; |
805 | } else { |
806 | if (readingClassAttr) { |
807 | // While reading the class attribute, the supertypes |
808 | // might refer to a type variable from an enclosing element |
809 | // (method or class). |
810 | // If the type variable is defined in the enclosing class, |
811 | // we can actually find it in |
812 | // currentOwner.owner.type.getTypeArguments() |
813 | // However, until we have read the enclosing method attribute |
814 | // we don't know for sure if this owner is correct. It could |
815 | // be a method and there is no way to tell before reading the |
816 | // enclosing method attribute. |
817 | TypeVar t = new TypeVar(name, currentOwner, syms.botType); |
818 | missingTypeVariables = missingTypeVariables.prepend(t); |
819 | // System.err.println("Missing type var " + name); |
820 | return t; |
821 | } |
822 | throw badClassFile("undecl.type.var", name); |
823 | } |
824 | } |
825 | |
826 | /************************************************************************ |
827 | * Reading Attributes |
828 | ***********************************************************************/ |
829 | |
830 | /** Report unrecognized attribute. |
831 | */ |
832 | void unrecognized(Name attrName) { |
833 | if (checkClassFile) |
834 | printCCF("ccf.unrecognized.attribute", attrName); |
835 | } |
836 | |
837 | /** Read member attribute. |
838 | */ |
839 | void readMemberAttr(Symbol sym, Name attrName, int attrLen) { |
840 | //- System.err.println(" z " + sym + ", " + attrName + ", " + attrLen); |
841 | if (attrName == names.ConstantValue) { |
842 | Object v = readPool(nextChar()); |
843 | // Ignore ConstantValue attribute if field not final. |
844 | if ((sym.flags() & FINAL) != 0) |
845 | ((VarSymbol)sym).setData(v); |
846 | } else if (attrName == names.Code) { |
847 | if (readAllOfClassFile || saveParameterNames) |
848 | ((MethodSymbol)sym).code = readCode(sym); |
849 | else |
850 | bp = bp + attrLen; |
851 | } else if (attrName == names.Exceptions) { |
852 | int nexceptions = nextChar(); |
853 | List<Type> thrown = List.nil(); |
854 | for (int j = 0; j < nexceptions; j++) |
855 | thrown = thrown.prepend(readClassSymbol(nextChar()).type); |
856 | if (sym.type.getThrownTypes().isEmpty()) |
857 | sym.type.asMethodType().thrown = thrown.reverse(); |
858 | } else if (attrName == names.Synthetic) { |
859 | // bridge methods are visible when generics not enabled |
860 | if (allowGenerics || (sym.flags_field & BRIDGE) == 0) |
861 | sym.flags_field |= SYNTHETIC; |
862 | } else if (attrName == names.Bridge) { |
863 | sym.flags_field |= BRIDGE; |
864 | if (!allowGenerics) |
865 | sym.flags_field &= ~SYNTHETIC; |
866 | } else if (attrName == names.Deprecated) { |
867 | sym.flags_field |= DEPRECATED; |
868 | } else if (attrName == names.Varargs) { |
869 | if (allowVarargs) sym.flags_field |= VARARGS; |
870 | } else if (attrName == names.Annotation) { |
871 | if (allowAnnotations) sym.flags_field |= ANNOTATION; |
872 | } else if (attrName == names.Enum) { |
873 | sym.flags_field |= ENUM; |
874 | } else if (allowGenerics && attrName == names.Signature) { |
875 | List<Type> thrown = sym.type.getThrownTypes(); |
876 | sym.type = readType(nextChar()); |
877 | //- System.err.println(" # " + sym.type); |
878 | if (sym.kind == MTH && sym.type.getThrownTypes().isEmpty()) |
879 | sym.type.asMethodType().thrown = thrown; |
880 | } else if (attrName == names.RuntimeVisibleAnnotations) { |
881 | attachAnnotations(sym); |
882 | } else if (attrName == names.RuntimeInvisibleAnnotations) { |
883 | attachAnnotations(sym); |
884 | } else if (attrName == names.RuntimeVisibleParameterAnnotations) { |
885 | attachParameterAnnotations(sym); |
886 | } else if (attrName == names.RuntimeInvisibleParameterAnnotations) { |
887 | attachParameterAnnotations(sym); |
888 | } else if (attrName == names.LocalVariableTable) { |
889 | int newbp = bp + attrLen; |
890 | if (saveParameterNames) { |
891 | // pick up parameter names from the variable table |
892 | List<Name> parameterNames = List.nil(); |
893 | int firstParam = ((sym.flags() & STATIC) == 0) ? 1 : 0; |
894 | int endParam = firstParam + Code.width(sym.type.getParameterTypes()); |
895 | int numEntries = nextChar(); |
896 | for (int i=0; i<numEntries; i++) { |
897 | int start_pc = nextChar(); |
898 | int length = nextChar(); |
899 | int nameIndex = nextChar(); |
900 | int sigIndex = nextChar(); |
901 | int register = nextChar(); |
902 | if (start_pc == 0 && |
903 | firstParam <= register && |
904 | register < endParam) { |
905 | int index = firstParam; |
906 | for (Type t : sym.type.getParameterTypes()) { |
907 | if (index == register) { |
908 | parameterNames = parameterNames.prepend(readName(nameIndex)); |
909 | break; |
910 | } |
911 | index += Code.width(t); |
912 | } |
913 | } |
914 | } |
915 | parameterNames = parameterNames.reverse(); |
916 | ((MethodSymbol)sym).savedParameterNames = parameterNames; |
917 | } |
918 | bp = newbp; |
919 | } else if (attrName == names.AnnotationDefault) { |
920 | attachAnnotationDefault(sym); |
921 | } else if (attrName == names.EnclosingMethod) { |
922 | int newbp = bp + attrLen; |
923 | readEnclosingMethodAttr(sym); |
924 | bp = newbp; |
925 | } else { |
926 | unrecognized(attrName); |
927 | bp = bp + attrLen; |
928 | } |
929 | } |
930 | |
931 | void readEnclosingMethodAttr(Symbol sym) { |
932 | // sym is a nested class with an "Enclosing Method" attribute |
933 | // remove sym from it's current owners scope and place it in |
934 | // the scope specified by the attribute |
935 | sym.owner.members().remove(sym); |
936 | ClassSymbol self = (ClassSymbol)sym; |
937 | ClassSymbol c = readClassSymbol(nextChar()); |
938 | NameAndType nt = (NameAndType)readPool(nextChar()); |
939 | |
940 | MethodSymbol m = findMethod(nt, c.members_field, self.flags()); |
941 | if (nt != null && m == null) |
942 | throw badClassFile("bad.enclosing.method", self); |
943 | |
944 | self.name = simpleBinaryName(self.flatname, c.flatname) ; |
945 | self.owner = m != null ? m : c; |
946 | if (self.name.len == 0) |
947 | self.fullname = null; |
948 | else |
949 | self.fullname = ClassSymbol.formFullName(self.name, self.owner); |
950 | |
951 | if (m != null) { |
952 | ((ClassType)sym.type).setEnclosingType(m.type); |
953 | } else if ((self.flags_field & STATIC) == 0) { |
954 | ((ClassType)sym.type).setEnclosingType(c.type); |
955 | } else { |
956 | ((ClassType)sym.type).setEnclosingType(Type.noType); |
957 | } |
958 | enterTypevars(self); |
959 | if (!missingTypeVariables.isEmpty()) { |
960 | ListBuffer<Type> typeVars = new ListBuffer<Type>(); |
961 | for (Type typevar : missingTypeVariables) { |
962 | typeVars.append(findTypeVar(typevar.tsym.name)); |
963 | } |
964 | foundTypeVariables = typeVars.toList(); |
965 | } else { |
966 | foundTypeVariables = List.nil(); |
967 | } |
968 | } |
969 | |
970 | // See java.lang.Class |
971 | private Name simpleBinaryName(Name self, Name enclosing) { |
972 | String simpleBinaryName = self.toString().substring(enclosing.toString().length()); |
973 | if (simpleBinaryName.length() < 1 || simpleBinaryName.charAt(0) != '$') |
974 | throw badClassFile("bad.enclosing.method", self); |
975 | int index = 1; |
976 | while (index < simpleBinaryName.length() && |
977 | isAsciiDigit(simpleBinaryName.charAt(index))) |
978 | index++; |
979 | return names.fromString(simpleBinaryName.substring(index)); |
980 | } |
981 | |
982 | private MethodSymbol findMethod(NameAndType nt, Scope scope, long flags) { |
983 | if (nt == null) |
984 | return null; |
985 | |
986 | MethodType type = nt.type.asMethodType(); |
987 | |
988 | for (Scope.Entry e = scope.lookup(nt.name); e.scope != null; e = e.next()) |
989 | if (e.sym.kind == MTH && isSameBinaryType(e.sym.type.asMethodType(), type)) |
990 | return (MethodSymbol)e.sym; |
991 | |
992 | if (nt.name != names.init) |
993 | // not a constructor |
994 | return null; |
995 | if ((flags & INTERFACE) != 0) |
996 | // no enclosing instance |
997 | return null; |
998 | if (nt.type.getParameterTypes().isEmpty()) |
999 | // no parameters |
1000 | return null; |
1001 | |
1002 | // A constructor of an inner class. |
1003 | // Remove the first argument (the enclosing instance) |
1004 | nt.type = new MethodType(nt.type.getParameterTypes().tail, |
1005 | nt.type.getReturnType(), |
1006 | nt.type.getThrownTypes(), |
1007 | syms.methodClass); |
1008 | // Try searching again |
1009 | return findMethod(nt, scope, flags); |
1010 | } |
1011 | |
1012 | /** Similar to Types.isSameType but avoids completion */ |
1013 | private boolean isSameBinaryType(MethodType mt1, MethodType mt2) { |
1014 | List<Type> types1 = types.erasure(mt1.getParameterTypes()) |
1015 | .prepend(types.erasure(mt1.getReturnType())); |
1016 | List<Type> types2 = mt2.getParameterTypes().prepend(mt2.getReturnType()); |
1017 | while (!types1.isEmpty() && !types2.isEmpty()) { |
1018 | if (types1.head.tsym != types2.head.tsym) |
1019 | return false; |
1020 | types1 = types1.tail; |
1021 | types2 = types2.tail; |
1022 | } |
1023 | return types1.isEmpty() && types2.isEmpty(); |
1024 | } |
1025 | |
1026 | /** |
1027 | * Character.isDigit answers <tt>true</tt> to some non-ascii |
1028 | * digits. This one does not. <b>copied from java.lang.Class</b> |
1029 | */ |
1030 | private static boolean isAsciiDigit(char c) { |
1031 | return '0' <= c && c <= '9'; |
1032 | } |
1033 | |
1034 | /** Read member attributes. |
1035 | */ |
1036 | void readMemberAttrs(Symbol sym) { |
1037 | char ac = nextChar(); |
1038 | for (int i = 0; i < ac; i++) { |
1039 | Name attrName = readName(nextChar()); |
1040 | int attrLen = nextInt(); |
1041 | readMemberAttr(sym, attrName, attrLen); |
1042 | } |
1043 | } |
1044 | |
1045 | /** Read class attribute. |
1046 | */ |
1047 | void readClassAttr(ClassSymbol c, Name attrName, int attrLen) { |
1048 | if (attrName == names.SourceFile) { |
1049 | Name n = readName(nextChar()); |
1050 | c.sourcefile = new SourceFileObject(n); |
1051 | } else if (attrName == names.InnerClasses) { |
1052 | readInnerClasses(c); |
1053 | } else if (allowGenerics && attrName == names.Signature) { |
1054 | readingClassAttr = true; |
1055 | try { |
1056 | ClassType ct1 = (ClassType)c.type; |
1057 | assert c == currentOwner; |
1058 | ct1.typarams_field = readTypeParams(nextChar()); |
1059 | ct1.supertype_field = sigToType(); |
1060 | ListBuffer<Type> is = new ListBuffer<Type>(); |
1061 | while (sigp != siglimit) is.append(sigToType()); |
1062 | ct1.interfaces_field = is.toList(); |
1063 | } finally { |
1064 | readingClassAttr = false; |
1065 | } |
1066 | } else { |
1067 | readMemberAttr(c, attrName, attrLen); |
1068 | } |
1069 | } |
1070 | private boolean readingClassAttr = false; |
1071 | private List<Type> missingTypeVariables = List.nil(); |
1072 | private List<Type> foundTypeVariables = List.nil(); |
1073 | |
1074 | /** Read class attributes. |
1075 | */ |
1076 | void readClassAttrs(ClassSymbol c) { |
1077 | char ac = nextChar(); |
1078 | for (int i = 0; i < ac; i++) { |
1079 | Name attrName = readName(nextChar()); |
1080 | int attrLen = nextInt(); |
1081 | readClassAttr(c, attrName, attrLen); |
1082 | } |
1083 | } |
1084 | |
1085 | /** Read code block. |
1086 | */ |
1087 | Code readCode(Symbol owner) { |
1088 | nextChar(); // max_stack |
1089 | nextChar(); // max_locals |
1090 | final int code_length = nextInt(); |
1091 | bp += code_length; |
1092 | final char exception_table_length = nextChar(); |
1093 | bp += exception_table_length * 8; |
1094 | readMemberAttrs(owner); |
1095 | return null; |
1096 | } |
1097 | |
1098 | /************************************************************************ |
1099 | * Reading Java-language annotations |
1100 | ***********************************************************************/ |
1101 | |
1102 | /** Attach annotations. |
1103 | */ |
1104 | void attachAnnotations(final Symbol sym) { |
1105 | int numAttributes = nextChar(); |
1106 | if (numAttributes != 0) { |
1107 | ListBuffer<CompoundAnnotationProxy> proxies = |
1108 | new ListBuffer<CompoundAnnotationProxy>(); |
1109 | for (int i = 0; i<numAttributes; i++) { |
1110 | CompoundAnnotationProxy proxy = readCompoundAnnotation(); |
1111 | if (proxy.type.tsym == syms.proprietaryType.tsym) |
1112 | sym.flags_field |= PROPRIETARY; |
1113 | else |
1114 | proxies.append(proxy); |
1115 | } |
1116 | annotate.later(new AnnotationCompleter(sym, proxies.toList())); |
1117 | } |
1118 | } |
1119 | |
1120 | /** Attach parameter annotations. |
1121 | */ |
1122 | void attachParameterAnnotations(final Symbol method) { |
1123 | final MethodSymbol meth = (MethodSymbol)method; |
1124 | int numParameters = buf[bp++] & 0xFF; |
1125 | List<VarSymbol> parameters = meth.params(); |
1126 | int pnum = 0; |
1127 | while (parameters.tail != null) { |
1128 | attachAnnotations(parameters.head); |
1129 | parameters = parameters.tail; |
1130 | pnum++; |
1131 | } |
1132 | if (pnum != numParameters) { |
1133 | throw badClassFile("bad.runtime.invisible.param.annotations", meth); |
1134 | } |
1135 | } |
1136 | |
1137 | /** Attach the default value for an annotation element. |
1138 | */ |
1139 | void attachAnnotationDefault(final Symbol sym) { |
1140 | final MethodSymbol meth = (MethodSymbol)sym; // only on methods |
1141 | final Attribute value = readAttributeValue(); |
1142 | annotate.later(new AnnotationDefaultCompleter(meth, value)); |
1143 | } |
1144 | |
1145 | Type readTypeOrClassSymbol(int i) { |
1146 | // support preliminary jsr175-format class files |
1147 | if (buf[poolIdx[i]] == CONSTANT_Class) |
1148 | return readClassSymbol(i).type; |
1149 | return readType(i); |
1150 | } |
1151 | Type readEnumType(int i) { |
1152 | // support preliminary jsr175-format class files |
1153 | int index = poolIdx[i]; |
1154 | int length = getChar(index + 1); |
1155 | if (buf[index + length + 2] != ';') |
1156 | return enterClass(readName(i)).type; |
1157 | return readType(i); |
1158 | } |
1159 | |
1160 | CompoundAnnotationProxy readCompoundAnnotation() { |
1161 | Type t = readTypeOrClassSymbol(nextChar()); |
1162 | int numFields = nextChar(); |
1163 | ListBuffer<Pair<Name,Attribute>> pairs = |
1164 | new ListBuffer<Pair<Name,Attribute>>(); |
1165 | for (int i=0; i<numFields; i++) { |
1166 | Name name = readName(nextChar()); |
1167 | Attribute value = readAttributeValue(); |
1168 | pairs.append(new Pair<Name,Attribute>(name, value)); |
1169 | } |
1170 | return new CompoundAnnotationProxy(t, pairs.toList()); |
1171 | } |
1172 | |
1173 | Attribute readAttributeValue() { |
1174 | char c = (char) buf[bp++]; |
1175 | switch (c) { |
1176 | case 'B': |
1177 | return new Attribute.Constant(syms.byteType, readPool(nextChar())); |
1178 | case 'C': |
1179 | return new Attribute.Constant(syms.charType, readPool(nextChar())); |
1180 | case 'D': |
1181 | return new Attribute.Constant(syms.doubleType, readPool(nextChar())); |
1182 | case 'F': |
1183 | return new Attribute.Constant(syms.floatType, readPool(nextChar())); |
1184 | case 'I': |
1185 | return new Attribute.Constant(syms.intType, readPool(nextChar())); |
1186 | case 'J': |
1187 | return new Attribute.Constant(syms.longType, readPool(nextChar())); |
1188 | case 'S': |
1189 | return new Attribute.Constant(syms.shortType, readPool(nextChar())); |
1190 | case 'Z': |
1191 | return new Attribute.Constant(syms.booleanType, readPool(nextChar())); |
1192 | case 's': |
1193 | return new Attribute.Constant(syms.stringType, readPool(nextChar()).toString()); |
1194 | case 'e': |
1195 | return new EnumAttributeProxy(readEnumType(nextChar()), readName(nextChar())); |
1196 | case 'c': |
1197 | return new Attribute.Class(types, readTypeOrClassSymbol(nextChar())); |
1198 | case '[': { |
1199 | int n = nextChar(); |
1200 | ListBuffer<Attribute> l = new ListBuffer<Attribute>(); |
1201 | for (int i=0; i<n; i++) |
1202 | l.append(readAttributeValue()); |
1203 | return new ArrayAttributeProxy(l.toList()); |
1204 | } |
1205 | case '@': |
1206 | return readCompoundAnnotation(); |
1207 | default: |
1208 | throw new AssertionError("unknown annotation tag '" + c + "'"); |
1209 | } |
1210 | } |
1211 | |
1212 | interface ProxyVisitor extends Attribute.Visitor { |
1213 | void visitEnumAttributeProxy(EnumAttributeProxy proxy); |
1214 | void visitArrayAttributeProxy(ArrayAttributeProxy proxy); |
1215 | void visitCompoundAnnotationProxy(CompoundAnnotationProxy proxy); |
1216 | } |
1217 | |
1218 | static class EnumAttributeProxy extends Attribute { |
1219 | Type enumType; |
1220 | Name enumerator; |
1221 | public EnumAttributeProxy(Type enumType, Name enumerator) { |
1222 | super(null); |
1223 | this.enumType = enumType; |
1224 | this.enumerator = enumerator; |
1225 | } |
1226 | public void accept(Visitor v) { ((ProxyVisitor)v).visitEnumAttributeProxy(this); } |
1227 | public String toString() { |
1228 | return "/*proxy enum*/" + enumType + "." + enumerator; |
1229 | } |
1230 | } |
1231 | |
1232 | static class ArrayAttributeProxy extends Attribute { |
1233 | List<Attribute> values; |
1234 | ArrayAttributeProxy(List<Attribute> values) { |
1235 | super(null); |
1236 | this.values = values; |
1237 | } |
1238 | public void accept(Visitor v) { ((ProxyVisitor)v).visitArrayAttributeProxy(this); } |
1239 | public String toString() { |
1240 | return "{" + values + "}"; |
1241 | } |
1242 | } |
1243 | |
1244 | /** A temporary proxy representing a compound attribute. |
1245 | */ |
1246 | static class CompoundAnnotationProxy extends Attribute { |
1247 | final List<Pair<Name,Attribute>> values; |
1248 | public CompoundAnnotationProxy(Type type, |
1249 | List<Pair<Name,Attribute>> values) { |
1250 | super(type); |
1251 | this.values = values; |
1252 | } |
1253 | public void accept(Visitor v) { ((ProxyVisitor)v).visitCompoundAnnotationProxy(this); } |
1254 | public String toString() { |
1255 | StringBuffer buf = new StringBuffer(); |
1256 | buf.append("@"); |
1257 | buf.append(type.tsym.getQualifiedName()); |
1258 | buf.append("/*proxy*/{"); |
1259 | boolean first = true; |
1260 | for (List<Pair<Name,Attribute>> v = values; |
1261 | v.nonEmpty(); v = v.tail) { |
1262 | Pair<Name,Attribute> value = v.head; |
1263 | if (!first) buf.append(","); |
1264 | first = false; |
1265 | buf.append(value.fst); |
1266 | buf.append("="); |
1267 | buf.append(value.snd); |
1268 | } |
1269 | buf.append("}"); |
1270 | return buf.toString(); |
1271 | } |
1272 | } |
1273 | |
1274 | class AnnotationDeproxy implements ProxyVisitor { |
1275 | private ClassSymbol requestingOwner = currentOwner.kind == MTH |
1276 | ? currentOwner.enclClass() : (ClassSymbol)currentOwner; |
1277 | |
1278 | List<Attribute.Compound> deproxyCompoundList(List<CompoundAnnotationProxy> pl) { |
1279 | // also must fill in types!!!! |
1280 | ListBuffer<Attribute.Compound> buf = |
1281 | new ListBuffer<Attribute.Compound>(); |
1282 | for (List<CompoundAnnotationProxy> l = pl; l.nonEmpty(); l=l.tail) { |
1283 | buf.append(deproxyCompound(l.head)); |
1284 | } |
1285 | return buf.toList(); |
1286 | } |
1287 | |
1288 | Attribute.Compound deproxyCompound(CompoundAnnotationProxy a) { |
1289 | ListBuffer<Pair<Symbol.MethodSymbol,Attribute>> buf = |
1290 | new ListBuffer<Pair<Symbol.MethodSymbol,Attribute>>(); |
1291 | for (List<Pair<Name,Attribute>> l = a.values; |
1292 | l.nonEmpty(); |
1293 | l = l.tail) { |
1294 | MethodSymbol meth = findAccessMethod(a.type, l.head.fst); |
1295 | buf.append(new Pair<Symbol.MethodSymbol,Attribute> |
1296 | (meth, deproxy(meth.type.getReturnType(), l.head.snd))); |
1297 | } |
1298 | return new Attribute.Compound(a.type, buf.toList()); |
1299 | } |
1300 | |
1301 | MethodSymbol findAccessMethod(Type container, Name name) { |
1302 | CompletionFailure failure = null; |
1303 | try { |
1304 | for (Scope.Entry e = container.tsym.members().lookup(name); |
1305 | e.scope != null; |
1306 | e = e.next()) { |
1307 | Symbol sym = e.sym; |
1308 | if (sym.kind == MTH && sym.type.getParameterTypes().length() == 0) |
1309 | return (MethodSymbol) sym; |
1310 | } |
1311 | } catch (CompletionFailure ex) { |
1312 | failure = ex; |
1313 | } |
1314 | // The method wasn't found: emit a warning and recover |
1315 | JavaFileObject prevSource = log.useSource(requestingOwner.classfile); |
1316 | try { |
1317 | if (failure == null) { |
1318 | log.warning("annotation.method.not.found", |
1319 | container, |
1320 | name); |
1321 | } else { |
1322 | log.warning("annotation.method.not.found.reason", |
1323 | container, |
1324 | name, |
1325 | failure.getMessage()); |
1326 | } |
1327 | } finally { |
1328 | log.useSource(prevSource); |
1329 | } |
1330 | // Construct a new method type and symbol. Use bottom |
1331 | // type (typeof null) as return type because this type is |
1332 | // a subtype of all reference types and can be converted |
1333 | // to primitive types by unboxing. |
1334 | MethodType mt = new MethodType(List.<Type>nil(), |
1335 | syms.botType, |
1336 | List.<Type>nil(), |
1337 | syms.methodClass); |
1338 | return new MethodSymbol(PUBLIC | ABSTRACT, name, mt, container.tsym); |
1339 | } |
1340 | |
1341 | Attribute result; |
1342 | Type type; |
1343 | Attribute deproxy(Type t, Attribute a) { |
1344 | Type oldType = type; |
1345 | try { |
1346 | type = t; |
1347 | a.accept(this); |
1348 | return result; |
1349 | } finally { |
1350 | type = oldType; |
1351 | } |
1352 | } |
1353 | |
1354 | // implement Attribute.Visitor below |
1355 | |
1356 | public void visitConstant(Attribute.Constant value) { |
1357 | // assert value.type == type; |
1358 | result = value; |
1359 | } |
1360 | |
1361 | public void visitClass(Attribute.Class clazz) { |
1362 | result = clazz; |
1363 | } |
1364 | |
1365 | public void visitEnum(Attribute.Enum e) { |
1366 | throw new AssertionError(); // shouldn't happen |
1367 | } |
1368 | |
1369 | public void visitCompound(Attribute.Compound compound) { |
1370 | throw new AssertionError(); // shouldn't happen |
1371 | } |
1372 | |
1373 | public void visitArray(Attribute.Array array) { |
1374 | throw new AssertionError(); // shouldn't happen |
1375 | } |
1376 | |
1377 | public void visitError(Attribute.Error e) { |
1378 | throw new AssertionError(); // shouldn't happen |
1379 | } |
1380 | |
1381 | public void visitEnumAttributeProxy(EnumAttributeProxy proxy) { |
1382 | // type.tsym.flatName() should == proxy.enumFlatName |
1383 | TypeSymbol enumTypeSym = proxy.enumType.tsym; |
1384 | VarSymbol enumerator = null; |
1385 | for (Scope.Entry e = enumTypeSym.members().lookup(proxy.enumerator); |
1386 | e.scope != null; |
1387 | e = e.next()) { |
1388 | if (e.sym.kind == VAR) { |
1389 | enumerator = (VarSymbol)e.sym; |
1390 | break; |
1391 | } |
1392 | } |
1393 | if (enumerator == null) { |
1394 | log.error("unknown.enum.constant", |
1395 | currentClassFile, enumTypeSym, proxy.enumerator); |
1396 | result = new Attribute.Error(enumTypeSym.type); |
1397 | } else { |
1398 | result = new Attribute.Enum(enumTypeSym.type, enumerator); |
1399 | } |
1400 | } |
1401 | |
1402 | public void visitArrayAttributeProxy(ArrayAttributeProxy proxy) { |
1403 | int length = proxy.values.length(); |
1404 | Attribute[] ats = new Attribute[length]; |
1405 | Type elemtype = types.elemtype(type); |
1406 | int i = 0; |
1407 | for (List<Attribute> p = proxy.values; p.nonEmpty(); p = p.tail) { |
1408 | ats[i++] = deproxy(elemtype, p.head); |
1409 | } |
1410 | result = new Attribute.Array(type, ats); |
1411 | } |
1412 | |
1413 | public void visitCompoundAnnotationProxy(CompoundAnnotationProxy proxy) { |
1414 | result = deproxyCompound(proxy); |
1415 | } |
1416 | } |
1417 | |
1418 | class AnnotationDefaultCompleter extends AnnotationDeproxy implements Annotate.Annotator { |
1419 | final MethodSymbol sym; |
1420 | final Attribute value; |
1421 | final JavaFileObject classFile = currentClassFile; |
1422 | public String toString() { |
1423 | return " ClassReader store default for " + sym.owner + "." + sym + " is " + value; |
1424 | } |
1425 | AnnotationDefaultCompleter(MethodSymbol sym, Attribute value) { |
1426 | this.sym = sym; |
1427 | this.value = value; |
1428 | } |
1429 | // implement Annotate.Annotator.enterAnnotation() |
1430 | public void enterAnnotation() { |
1431 | JavaFileObject previousClassFile = currentClassFile; |
1432 | try { |
1433 | currentClassFile = classFile; |
1434 | sym.defaultValue = deproxy(sym.type.getReturnType(), value); |
1435 | } finally { |
1436 | currentClassFile = previousClassFile; |
1437 | } |
1438 | } |
1439 | } |
1440 | |
1441 | class AnnotationCompleter extends AnnotationDeproxy implements Annotate.Annotator { |
1442 | final Symbol sym; |
1443 | final List<CompoundAnnotationProxy> l; |
1444 | final JavaFileObject classFile; |
1445 | public String toString() { |
1446 | return " ClassReader annotate " + sym.owner + "." + sym + " with " + l; |
1447 | } |
1448 | AnnotationCompleter(Symbol sym, List<CompoundAnnotationProxy> l) { |
1449 | this.sym = sym; |
1450 | this.l = l; |
1451 | this.classFile = currentClassFile; |
1452 | } |
1453 | // implement Annotate.Annotator.enterAnnotation() |
1454 | public void enterAnnotation() { |
1455 | JavaFileObject previousClassFile = currentClassFile; |
1456 | try { |
1457 | currentClassFile = classFile; |
1458 | List<Attribute.Compound> newList = deproxyCompoundList(l); |
1459 | sym.attributes_field = ((sym.attributes_field == null) |
1460 | ? newList |
1461 | : newList.prependList(sym.attributes_field)); |
1462 | } finally { |
1463 | currentClassFile = previousClassFile; |
1464 | } |
1465 | } |
1466 | } |
1467 | |
1468 | |
1469 | /************************************************************************ |
1470 | * Reading Symbols |
1471 | ***********************************************************************/ |
1472 | |
1473 | /** Read a field. |
1474 | */ |
1475 | VarSymbol readField() { |
1476 | long flags = adjustFieldFlags(nextChar()); |
1477 | Name name = readName(nextChar()); |
1478 | Type type = readType(nextChar()); |
1479 | VarSymbol v = new VarSymbol(flags, name, type, currentOwner); |
1480 | readMemberAttrs(v); |
1481 | return v; |
1482 | } |
1483 | |
1484 | /** Read a method. |
1485 | */ |
1486 | MethodSymbol readMethod() { |
1487 | long flags = adjustMethodFlags(nextChar()); |
1488 | Name name = readName(nextChar()); |
1489 | Type type = readType(nextChar()); |
1490 | if (name == names.init && currentOwner.hasOuterInstance()) { |
1491 | // Sometimes anonymous classes don't have an outer |
1492 | // instance, however, there is no reliable way to tell so |
1493 | // we never strip this$n |
1494 | if (currentOwner.name.len != 0) |
1495 | type = new MethodType(type.getParameterTypes().tail, |
1496 | type.getReturnType(), |
1497 | type.getThrownTypes(), |
1498 | syms.methodClass); |
1499 | } |
1500 | MethodSymbol m = new MethodSymbol(flags, name, type, currentOwner); |
1501 | Symbol prevOwner = currentOwner; |
1502 | currentOwner = m; |
1503 | try { |
1504 | readMemberAttrs(m); |
1505 | } finally { |
1506 | currentOwner = prevOwner; |
1507 | } |
1508 | return m; |
1509 | } |
1510 | |
1511 | /** Skip a field or method |
1512 | */ |
1513 | void skipMember() { |
1514 | bp = bp + 6; |
1515 | char ac = nextChar(); |
1516 | for (int i = 0; i < ac; i++) { |
1517 | bp = bp + 2; |
1518 | int attrLen = nextInt(); |
1519 | bp = bp + attrLen; |
1520 | } |
1521 | } |
1522 | |
1523 | /** Enter type variables of this classtype and all enclosing ones in |
1524 | * `typevars'. |
1525 | */ |
1526 | protected void enterTypevars(Type t) { |
1527 | if (t.getEnclosingType() != null && t.getEnclosingType().tag == CLASS) |
1528 | enterTypevars(t.getEnclosingType()); |
1529 | for (List<Type> xs = t.getTypeArguments(); xs.nonEmpty(); xs = xs.tail) |
1530 | typevars.enter(xs.head.tsym); |
1531 | } |
1532 | |
1533 | protected void enterTypevars(Symbol sym) { |
1534 | if (sym.owner.kind == MTH) { |
1535 | enterTypevars(sym.owner); |
1536 | enterTypevars(sym.owner.owner); |
1537 | } |
1538 | enterTypevars(sym.type); |
1539 | } |
1540 | |
1541 | /** Read contents of a given class symbol `c'. Both external and internal |
1542 | * versions of an inner class are read. |
1543 | */ |
1544 | void readClass(ClassSymbol c) { |
1545 | ClassType ct = (ClassType)c.type; |
1546 | |
1547 | // allocate scope for members |
1548 | c.members_field = new Scope(c); |
1549 | |
1550 | // prepare type variable table |
1551 | typevars = typevars.dup(currentOwner); |
1552 | if (ct.getEnclosingType().tag == CLASS) enterTypevars(ct.getEnclosingType()); |
1553 | |
1554 | // read flags, or skip if this is an inner class |
1555 | long flags = adjustClassFlags(nextChar()); |
1556 | if (c.owner.kind == PCK) c.flags_field = flags; |
1557 | |
1558 | // read own class name and check that it matches |
1559 | ClassSymbol self = readClassSymbol(nextChar()); |
1560 | if (c != self) |
1561 | throw badClassFile("class.file.wrong.class", |
1562 | self.flatname); |
1563 | |
1564 | // class attributes must be read before class |
1565 | // skip ahead to read class attributes |
1566 | int startbp = bp; |
1567 | nextChar(); |
1568 | char interfaceCount = nextChar(); |
1569 | bp += interfaceCount * 2; |
1570 | char fieldCount = nextChar(); |
1571 | for (int i = 0; i < fieldCount; i++) skipMember(); |
1572 | char methodCount = nextChar(); |
1573 | for (int i = 0; i < methodCount; i++) skipMember(); |
1574 | readClassAttrs(c); |
1575 | |
1576 | if (readAllOfClassFile) { |
1577 | for (int i = 1; i < poolObj.length; i++) readPool(i); |
1578 | c.pool = new Pool(poolObj.length, poolObj); |
1579 | } |
1580 | |
1581 | // reset and read rest of classinfo |
1582 | bp = startbp; |
1583 | int n = nextChar(); |
1584 | if (ct.supertype_field == null) |
1585 | ct.supertype_field = (n == 0) |
1586 | ? Type.noType |
1587 | : readClassSymbol(n).erasure(types); |
1588 | n = nextChar(); |
1589 | List<Type> is = List.nil(); |
1590 | for (int i = 0; i < n; i++) { |
1591 | Type _inter = readClassSymbol(nextChar()).erasure(types); |
1592 | is = is.prepend(_inter); |
1593 | } |
1594 | if (ct.interfaces_field == null) |
1595 | ct.interfaces_field = is.reverse(); |
1596 | |
1597 | if (fieldCount != nextChar()) assert false; |
1598 | for (int i = 0; i < fieldCount; i++) enterMember(c, readField()); |
1599 | if (methodCount != nextChar()) assert false; |
1600 | for (int i = 0; i < methodCount; i++) enterMember(c, readMethod()); |
1601 | |
1602 | typevars = typevars.leave(); |
1603 | } |
1604 | |
1605 | /** Read inner class info. For each inner/outer pair allocate a |
1606 | * member class. |
1607 | */ |
1608 | void readInnerClasses(ClassSymbol c) { |
1609 | int n = nextChar(); |
1610 | for (int i = 0; i < n; i++) { |
1611 | nextChar(); // skip inner class symbol |
1612 | ClassSymbol outer = readClassSymbol(nextChar()); |
1613 | Name name = readName(nextChar()); |
1614 | if (name == null) name = names.empty; |
1615 | long flags = adjustClassFlags(nextChar()); |
1616 | if (outer != null) { // we have a member class |
1617 | if (name == names.empty) |
1618 | name = names.one; |
1619 | ClassSymbol member = enterClass(name, outer); |
1620 | if ((flags & STATIC) == 0) { |
1621 | ((ClassType)member.type).setEnclosingType(outer.type); |
1622 | if (member.erasure_field != null) |
1623 | ((ClassType)member.erasure_field).setEnclosingType(types.erasure(outer.type)); |
1624 | } |
1625 | if (c == outer) { |
1626 | member.flags_field = flags; |
1627 | enterMember(c, member); |
1628 | } |
1629 | } |
1630 | } |
1631 | } |
1632 | |
1633 | /** Read a class file. |
1634 | */ |
1635 | private void readClassFile(ClassSymbol c) throws IOException { |
1636 | int magic = nextInt(); |
1637 | if (magic != JAVA_MAGIC) |
1638 | throw badClassFile("illegal.start.of.class.file"); |
1639 | |
1640 | int minorVersion = nextChar(); |
1641 | int majorVersion = nextChar(); |
1642 | int maxMajor = Target.MAX().majorVersion; |
1643 | int maxMinor = Target.MAX().minorVersion; |
1644 | if (majorVersion > maxMajor || |
1645 | majorVersion * 1000 + minorVersion < |
1646 | Target.MIN().majorVersion * 1000 + Target.MIN().minorVersion) |
1647 | { |
1648 | if (majorVersion == (maxMajor + 1)) |
1649 | log.warning("big.major.version", |
1650 | currentClassFile, |
1651 | majorVersion, |
1652 | maxMajor); |
1653 | else |
1654 | throw badClassFile("wrong.version", |
1655 | Integer.toString(majorVersion), |
1656 | Integer.toString(minorVersion), |
1657 | Integer.toString(maxMajor), |
1658 | Integer.toString(maxMinor)); |
1659 | } |
1660 | else if (checkClassFile && |
1661 | majorVersion == maxMajor && |
1662 | minorVersion > maxMinor) |
1663 | { |
1664 | printCCF("found.later.version", |
1665 | Integer.toString(minorVersion)); |
1666 | } |
1667 | indexPool(); |
1668 | if (signatureBuffer.length < bp) { |
1669 | int ns = Integer.highestOneBit(bp) << 1; |
1670 | signatureBuffer = new byte[ns]; |
1671 | } |
1672 | readClass(c); |
1673 | } |
1674 | |
1675 | /************************************************************************ |
1676 | * Adjusting flags |
1677 | ***********************************************************************/ |
1678 | |
1679 | long adjustFieldFlags(long flags) { |
1680 | return flags; |
1681 | } |
1682 | long adjustMethodFlags(long flags) { |
1683 | if ((flags & ACC_BRIDGE) != 0) { |
1684 | flags &= ~ACC_BRIDGE; |
1685 | flags |= BRIDGE; |
1686 | if (!allowGenerics) |
1687 | flags &= ~SYNTHETIC; |
1688 | } |
1689 | if ((flags & ACC_VARARGS) != 0) { |
1690 | flags &= ~ACC_VARARGS; |
1691 | flags |= VARARGS; |
1692 | } |
1693 | return flags; |
1694 | } |
1695 | long adjustClassFlags(long flags) { |
1696 | return flags & ~ACC_SUPER; // SUPER and SYNCHRONIZED bits overloaded |
1697 | } |
1698 | |
1699 | /************************************************************************ |
1700 | * Loading Classes |
1701 | ***********************************************************************/ |
1702 | |
1703 | /** Define a new class given its name and owner. |
1704 | */ |
1705 | public ClassSymbol defineClass(Name name, Symbol owner) { |
1706 | ClassSymbol c = new ClassSymbol(0, name, owner); |
1707 | if (owner.kind == PCK) |
1708 | assert classes.get(c.flatname) == null : c; |
1709 | c.completer = this; |
1710 | return c; |
1711 | } |
1712 | |
1713 | /** Create a new toplevel or member class symbol with given name |
1714 | * and owner and enter in `classes' unless already there. |
1715 | */ |
1716 | public ClassSymbol enterClass(Name name, TypeSymbol owner) { |
1717 | Name flatname = TypeSymbol.formFlatName(name, owner); |
1718 | ClassSymbol c = classes.get(flatname); |
1719 | if (c == null) { |
1720 | c = defineClass(name, owner); |
1721 | classes.put(flatname, c); |
1722 | } else if ((c.name != name || c.owner != owner) && owner.kind == TYP && c.owner.kind == PCK) { |
1723 | // reassign fields of classes that might have been loaded with |
1724 | // their flat names. |
1725 | c.owner.members().remove(c); |
1726 | c.name = name; |
1727 | c.owner = owner; |
1728 | c.fullname = ClassSymbol.formFullName(name, owner); |
1729 | } |
1730 | return c; |
1731 | } |
1732 | |
1733 | /** |
1734 | * Creates a new toplevel class symbol with given flat name and |
1735 | * given class (or source) file. |
1736 | * |
1737 | * @param flatName a fully qualified binary class name |
1738 | * @param classFile the class file or compilation unit defining |
1739 | * the class (may be {@code null}) |
1740 | * @return a newly created class symbol |
1741 | * @throws AssertionError if the class symbol already exists |
1742 | */ |
1743 | public ClassSymbol enterClass(Name flatName, JavaFileObject classFile) { |
1744 | ClassSymbol cs = classes.get(flatName); |
1745 | if (cs != null) { |
1746 | String msg = Log.format("%s: completer = %s; class file = %s; source file = %s", |
1747 | cs.fullname, |
1748 | cs.completer, |
1749 | cs.classfile, |
1750 | cs.sourcefile); |
1751 | throw new AssertionError(msg); |
1752 | } |
1753 | Name packageName = Convert.packagePart(flatName); |
1754 | PackageSymbol owner = packageName.isEmpty() |
1755 | ? syms.unnamedPackage |
1756 | : enterPackage(packageName); |
1757 | cs = defineClass(Convert.shortName(flatName), owner); |
1758 | cs.classfile = classFile; |
1759 | classes.put(flatName, cs); |
1760 | return cs; |
1761 | } |
1762 | |
1763 | /** Create a new member or toplevel class symbol with given flat name |
1764 | * and enter in `classes' unless already there. |
1765 | */ |
1766 | public ClassSymbol enterClass(Name flatname) { |
1767 | ClassSymbol c = classes.get(flatname); |
1768 | if (c == null) |
1769 | return enterClass(flatname, (JavaFileObject)null); |
1770 | else |
1771 | return c; |
1772 | } |
1773 | |
1774 | private boolean suppressFlush = false; |
1775 | |
1776 | /** Completion for classes to be loaded. Before a class is loaded |
1777 | * we make sure its enclosing class (if any) is loaded. |
1778 | */ |
1779 | public void complete(Symbol sym) throws CompletionFailure { |
1780 | if (sym.kind == TYP) { |
1781 | ClassSymbol c = (ClassSymbol)sym; |
1782 | c.members_field = new Scope.ErrorScope(c); // make sure it's always defined |
1783 | boolean suppressFlush = this.suppressFlush; |
1784 | this.suppressFlush = true; |
1785 | try { |
1786 | completeOwners(c.owner); |
1787 | completeEnclosing(c); |
1788 | } finally { |
1789 | this.suppressFlush = suppressFlush; |
1790 | } |
1791 | fillIn(c); |
1792 | } else if (sym.kind == PCK) { |
1793 | PackageSymbol p = (PackageSymbol)sym; |
1794 | try { |
1795 | fillIn(p); |
1796 | } catch (IOException ex) { |
1797 | throw new CompletionFailure(sym, ex.getLocalizedMessage()).initCause(ex); |
1798 | } |
1799 | } |
1800 | if (!filling && !suppressFlush) |
1801 | annotate.flush(); // finish attaching annotations |
1802 | } |
1803 | |
1804 | /** complete up through the enclosing package. */ |
1805 | private void completeOwners(Symbol o) { |
1806 | if (o.kind != PCK) completeOwners(o.owner); |
1807 | o.complete(); |
1808 | } |
1809 | |
1810 | /** |
1811 | * Tries to complete lexically enclosing classes if c looks like a |
1812 | * nested class. This is similar to completeOwners but handles |
1813 | * the situation when a nested class is accessed directly as it is |
1814 | * possible with the Tree API or javax.lang.model.*. |
1815 | */ |
1816 | private void completeEnclosing(ClassSymbol c) { |
1817 | if (c.owner.kind == PCK) { |
1818 | Symbol owner = c.owner; |
1819 | for (Name name : Convert.enclosingCandidates(Convert.shortName(c.name))) { |
1820 | Symbol encl = owner.members().lookup(name).sym; |
1821 | if (encl == null) |
1822 | encl = classes.get(TypeSymbol.formFlatName(name, owner)); |
1823 | if (encl != null) |
1824 | encl.complete(); |
1825 | } |
1826 | } |
1827 | } |
1828 | |
1829 | /** We can only read a single class file at a time; this |
1830 | * flag keeps track of when we are currently reading a class |
1831 | * file. |
1832 | */ |
1833 | private boolean filling = false; |
1834 | |
1835 | /** Fill in definition of class `c' from corresponding class or |
1836 | * source file. |
1837 | */ |
1838 | private void fillIn(ClassSymbol c) { |
1839 | if (completionFailureName == c.fullname) { |
1840 | throw new CompletionFailure(c, "user-selected completion failure by class name"); |
1841 | } |
1842 | currentOwner = c; |
1843 | JavaFileObject classfile = c.classfile; |
1844 | if (classfile != null) { |
1845 | JavaFileObject previousClassFile = currentClassFile; |
1846 | try { |
1847 | assert !filling : |
1848 | "Filling " + classfile.toUri() + |
1849 | " during " + previousClassFile; |
1850 | currentClassFile = classfile; |
1851 | if (verbose) { |
1852 | printVerbose("loading", currentClassFile.toString()); |
1853 | } |
1854 | if (classfile.getKind() == JavaFileObject.Kind.CLASS) { |
1855 | filling = true; |
1856 | try { |
1857 | bp = 0; |
1858 | buf = readInputStream(buf, classfile.openInputStream()); |
1859 | readClassFile(c); |
1860 | if (!missingTypeVariables.isEmpty() && !foundTypeVariables.isEmpty()) { |
1861 | List<Type> missing = missingTypeVariables; |
1862 | List<Type> found = foundTypeVariables; |
1863 | missingTypeVariables = List.nil(); |
1864 | foundTypeVariables = List.nil(); |
1865 | filling = false; |
1866 | ClassType ct = (ClassType)currentOwner.type; |
1867 | ct.supertype_field = |
1868 | types.subst(ct.supertype_field, missing, found); |
1869 | ct.interfaces_field = |
1870 | types.subst(ct.interfaces_field, missing, found); |
1871 | } else if (missingTypeVariables.isEmpty() != |
1872 | foundTypeVariables.isEmpty()) { |
1873 | Name name = missingTypeVariables.head.tsym.name; |
1874 | throw badClassFile("undecl.type.var", name); |
1875 | } |
1876 | } finally { |
1877 | missingTypeVariables = List.nil(); |
1878 | foundTypeVariables = List.nil(); |
1879 | filling = false; |
1880 | } |
1881 | } else { |
1882 | if (sourceCompleter != null) { |
1883 | sourceCompleter.complete(c); |
1884 | } else { |
1885 | throw new IllegalStateException("Source completer required to read " |
1886 | + classfile.toUri()); |
1887 | } |
1888 | } |
1889 | return; |
1890 | } catch (IOException ex) { |
1891 | throw badClassFile("unable.to.access.file", ex.getMessage()); |
1892 | } finally { |
1893 | currentClassFile = previousClassFile; |
1894 | } |
1895 | } else { |
1896 | throw |
1897 | newCompletionFailure(c, |
1898 | Log.getLocalizedString("class.file.not.found", |
1899 | c.flatname)); |
1900 | } |
1901 | } |
1902 | // where |
1903 | private static byte[] readInputStream(byte[] buf, InputStream s) throws IOException { |
1904 | try { |
1905 | buf = ensureCapacity(buf, s.available()); |
1906 | int r = s.read(buf); |
1907 | int bp = 0; |
1908 | while (r != -1) { |
1909 | bp += r; |
1910 | buf = ensureCapacity(buf, bp); |
1911 | r = s.read(buf, bp, buf.length - bp); |
1912 | } |
1913 | return buf; |
1914 | } finally { |
1915 | try { |
1916 | s.close(); |
1917 | } catch (IOException e) { |
1918 | /* Ignore any errors, as this stream may have already |
1919 | * thrown a related exception which is the one that |
1920 | * should be reported. |
1921 | */ |
1922 | } |
1923 | } |
1924 | } |
1925 | private static byte[] ensureCapacity(byte[] buf, int needed) { |
1926 | if (buf.length < needed) { |
1927 | byte[] old = buf; |
1928 | buf = new byte[Integer.highestOneBit(needed) << 1]; |
1929 | System.arraycopy(old, 0, buf, 0, old.length); |
1930 | } |
1931 | return buf; |
1932 | } |
1933 | /** Static factory for CompletionFailure objects. |
1934 | * In practice, only one can be used at a time, so we share one |
1935 | * to reduce the expense of allocating new exception objects. |
1936 | */ |
1937 | private CompletionFailure newCompletionFailure(ClassSymbol c, |
1938 | String localized) { |
1939 | if (!cacheCompletionFailure) { |
1940 | // log.warning("proc.messager", |
1941 | // Log.getLocalizedString("class.file.not.found", c.flatname)); |
1942 | // c.debug.printStackTrace(); |
1943 | return new CompletionFailure(c, localized); |
1944 | } else { |
1945 | CompletionFailure result = cachedCompletionFailure; |
1946 | result.sym = c; |
1947 | result.errmsg = localized; |
1948 | return result; |
1949 | } |
1950 | } |
1951 | private CompletionFailure cachedCompletionFailure = |
1952 | new CompletionFailure(null, null); |
1953 | { |
1954 | cachedCompletionFailure.setStackTrace(new StackTraceElement[0]); |
1955 | } |
1956 | |
1957 | /** Load a toplevel class with given fully qualified name |
1958 | * The class is entered into `classes' only if load was successful. |
1959 | */ |
1960 | public ClassSymbol loadClass(Name flatname) throws CompletionFailure { |
1961 | boolean absent = classes.get(flatname) == null; |
1962 | ClassSymbol c = enterClass(flatname); |
1963 | if (c.members_field == null && c.completer != null) { |
1964 | try { |
1965 | c.complete(); |
1966 | } catch (CompletionFailure ex) { |
1967 | if (absent) classes.remove(flatname); |
1968 | throw ex; |
1969 | } |
1970 | } |
1971 | return c; |
1972 | } |
1973 | |
1974 | /************************************************************************ |
1975 | * Loading Packages |
1976 | ***********************************************************************/ |
1977 | |
1978 | /** Check to see if a package exists, given its fully qualified name. |
1979 | */ |
1980 | public boolean packageExists(Name fullname) { |
1981 | return enterPackage(fullname).exists(); |
1982 | } |
1983 | |
1984 | /** Make a package, given its fully qualified name. |
1985 | */ |
1986 | public PackageSymbol enterPackage(Name fullname) { |
1987 | PackageSymbol p = packages.get(fullname); |
1988 | if (p == null) { |
1989 | assert !fullname.isEmpty() : "rootPackage missing!"; |
1990 | p = new PackageSymbol( |
1991 | Convert.shortName(fullname), |
1992 | enterPackage(Convert.packagePart(fullname))); |
1993 | p.completer = this; |
1994 | packages.put(fullname, p); |
1995 | } |
1996 | return p; |
1997 | } |
1998 | |
1999 | /** Make a package, given its unqualified name and enclosing package. |
2000 | */ |
2001 | public PackageSymbol enterPackage(Name name, PackageSymbol owner) { |
2002 | return enterPackage(TypeSymbol.formFullName(name, owner)); |
2003 | } |
2004 | |
2005 | /** Include class corresponding to given class file in package, |
2006 | * unless (1) we already have one the same kind (.class or .java), or |
2007 | * (2) we have one of the other kind, and the given class file |
2008 | * is older. |
2009 | */ |
2010 | protected void includeClassFile(PackageSymbol p, JavaFileObject file) { |
2011 | if ((p.flags_field & EXISTS) == 0) |
2012 | for (Symbol q = p; q != null && q.kind == PCK; q = q.owner) |
2013 | q.flags_field |= EXISTS; |
2014 | JavaFileObject.Kind kind = file.getKind(); |
2015 | int seen; |
2016 | if (kind == JavaFileObject.Kind.CLASS) |
2017 | seen = CLASS_SEEN; |
2018 | else |
2019 | seen = SOURCE_SEEN; |
2020 | String binaryName = fileManager.inferBinaryName(currentLoc, file); |
2021 | int lastDot = binaryName.lastIndexOf("."); |
2022 | Name classname = names.fromString(binaryName.substring(lastDot + 1)); |
2023 | boolean isPkgInfo = classname == names.package_info; |
2024 | ClassSymbol c = isPkgInfo |
2025 | ? p.package_info |
2026 | : (ClassSymbol) p.members_field.lookup(classname).sym; |
2027 | if (c == null) { |
2028 | c = enterClass(classname, p); |
2029 | if (c.classfile == null) // only update the file if's it's newly created |
2030 | c.classfile = file; |
2031 | if (isPkgInfo) { |
2032 | p.package_info = c; |
2033 | } else { |
2034 | if (c.owner == p) // it might be an inner class |
2035 | p.members_field.enter(c); |
2036 | } |
2037 | } else if (c.classfile != null && (c.flags_field & seen) == 0) { |
2038 | // if c.classfile == null, we are currently compiling this class |
2039 | // and no further action is necessary. |
2040 | // if (c.flags_field & seen) != 0, we have already encountered |
2041 | // a file of the same kind; again no further action is necessary. |
2042 | if ((c.flags_field & (CLASS_SEEN | SOURCE_SEEN)) != 0) |
2043 | c.classfile = preferredFileObject(file, c.classfile); |
2044 | } |
2045 | c.flags_field |= seen; |
2046 | } |
2047 | |
2048 | /** Implement policy to choose to derive information from a source |
2049 | * file or a class file when both are present. May be overridden |
2050 | * by subclasses. |
2051 | */ |
2052 | protected JavaFileObject preferredFileObject(JavaFileObject a, |
2053 | JavaFileObject b) { |
2054 | |
2055 | if (preferSource) |
2056 | return (a.getKind() == JavaFileObject.Kind.SOURCE) ? a : b; |
2057 | else { |
2058 | long adate = a.getLastModified(); |
2059 | long bdate = b.getLastModified(); |
2060 | // 6449326: policy for bad lastModifiedTime in ClassReader |
2061 | //assert adate >= 0 && bdate >= 0; |
2062 | return (adate > bdate) ? a : b; |
2063 | } |
2064 | } |
2065 | |
2066 | /** |
2067 | * specifies types of files to be read when filling in a package symbol |
2068 | */ |
2069 | protected EnumSet<JavaFileObject.Kind> getPackageFileKinds() { |
2070 | return EnumSet.of(JavaFileObject.Kind.CLASS, JavaFileObject.Kind.SOURCE); |
2071 | } |
2072 | |
2073 | /** |
2074 | * this is used to support javadoc |
2075 | */ |
2076 | protected void extraFileActions(PackageSymbol pack, JavaFileObject fe) { |
2077 | } |
2078 | |
2079 | protected Location currentLoc; // FIXME |
2080 | |
2081 | private boolean verbosePath = true; |
2082 | |
2083 | /** Load directory of package into members scope. |
2084 | */ |
2085 | private void fillIn(PackageSymbol p) throws IOException { |
2086 | if (p.members_field == null) p.members_field = new Scope(p); |
2087 | String packageName = p.fullname.toString(); |
2088 | |
2089 | Set<JavaFileObject.Kind> kinds = getPackageFileKinds(); |
2090 | |
2091 | fillIn(p, PLATFORM_CLASS_PATH, |
2092 | fileManager.list(PLATFORM_CLASS_PATH, |
2093 | packageName, |
2094 | EnumSet.of(JavaFileObject.Kind.CLASS), |
2095 | false)); |
2096 | |
2097 | Set<JavaFileObject.Kind> classKinds = EnumSet.copyOf(kinds); |
2098 | classKinds.remove(JavaFileObject.Kind.SOURCE); |
2099 | boolean wantClassFiles = !classKinds.isEmpty(); |
2100 | |
2101 | Set<JavaFileObject.Kind> sourceKinds = EnumSet.copyOf(kinds); |
2102 | sourceKinds.remove(JavaFileObject.Kind.CLASS); |
2103 | boolean wantSourceFiles = !sourceKinds.isEmpty(); |
2104 | |
2105 | boolean haveSourcePath = fileManager.hasLocation(SOURCE_PATH); |
2106 | |
2107 | if (verbose && verbosePath) { |
2108 | if (fileManager instanceof StandardJavaFileManager) { |
2109 | StandardJavaFileManager fm = (StandardJavaFileManager)fileManager; |
2110 | if (haveSourcePath && wantSourceFiles) { |
2111 | List<File> path = List.nil(); |
2112 | for (File file : fm.getLocation(SOURCE_PATH)) { |
2113 | path = path.prepend(file); |
2114 | } |
2115 | printVerbose("sourcepath", path.reverse().toString()); |
2116 | } else if (wantSourceFiles) { |
2117 | List<File> path = List.nil(); |
2118 | for (File file : fm.getLocation(CLASS_PATH)) { |
2119 | path = path.prepend(file); |
2120 | } |
2121 | printVerbose("sourcepath", path.reverse().toString()); |
2122 | } |
2123 | if (wantClassFiles) { |
2124 | List<File> path = List.nil(); |
2125 | for (File file : fm.getLocation(PLATFORM_CLASS_PATH)) { |
2126 | path = path.prepend(file); |
2127 | } |
2128 | for (File file : fm.getLocation(CLASS_PATH)) { |
2129 | path = path.prepend(file); |
2130 | } |
2131 | printVerbose("classpath", path.reverse().toString()); |
2132 | } |
2133 | } |
2134 | } |
2135 | |
2136 | if (wantSourceFiles && !haveSourcePath) { |
2137 | fillIn(p, CLASS_PATH, |
2138 | fileManager.list(CLASS_PATH, |
2139 | packageName, |
2140 | kinds, |
2141 | false)); |
2142 | } else { |
2143 | if (wantClassFiles) |
2144 | fillIn(p, CLASS_PATH, |
2145 | fileManager.list(CLASS_PATH, |
2146 | packageName, |
2147 | classKinds, |
2148 | false)); |
2149 | if (wantSourceFiles) |
2150 | fillIn(p, SOURCE_PATH, |
2151 | fileManager.list(SOURCE_PATH, |
2152 | packageName, |
2153 | sourceKinds, |
2154 | false)); |
2155 | } |
2156 | verbosePath = false; |
2157 | } |
2158 | // where |
2159 | private void fillIn(PackageSymbol p, |
2160 | Location location, |
2161 | Iterable<JavaFileObject> files) |
2162 | { |
2163 | currentLoc = location; |
2164 | for (JavaFileObject fo : files) { |
2165 | switch (fo.getKind()) { |
2166 | case CLASS: |
2167 | case SOURCE: { |
2168 | // TODO pass binaryName to includeClassFile |
2169 | String binaryName = fileManager.inferBinaryName(currentLoc, fo); |
2170 | String simpleName = binaryName.substring(binaryName.lastIndexOf(".") + 1); |
2171 | if (SourceVersion.isIdentifier(simpleName) || |
2172 | simpleName.equals("package-info")) |
2173 | includeClassFile(p, fo); |
2174 | break; |
2175 | } |
2176 | default: |
2177 | extraFileActions(p, fo); |
2178 | } |
2179 | } |
2180 | } |
2181 | |
2182 | /** Output for "-verbose" option. |
2183 | * @param key The key to look up the correct internationalized string. |
2184 | * @param arg An argument for substitution into the output string. |
2185 | */ |
2186 | private void printVerbose(String key, CharSequence arg) { |
2187 | Log.printLines(log.noticeWriter, Log.getLocalizedString("verbose." + key, arg)); |
2188 | } |
2189 | |
2190 | /** Output for "-checkclassfile" option. |
2191 | * @param key The key to look up the correct internationalized string. |
2192 | * @param arg An argument for substitution into the output string. |
2193 | */ |
2194 | private void printCCF(String key, Object arg) { |
2195 | Log.printLines(log.noticeWriter, Log.getLocalizedString(key, arg)); |
2196 | } |
2197 | |
2198 | |
2199 | public interface SourceCompleter { |
2200 | void complete(ClassSymbol sym) |
2201 | throws CompletionFailure; |
2202 | } |
2203 | |
2204 | /** |
2205 | * A subclass of JavaFileObject for the sourcefile attribute found in a classfile. |
2206 | * The attribute is only the last component of the original filename, so is unlikely |
2207 | * to be valid as is, so operations other than those to access the name throw |
2208 | * UnsupportedOperationException |
2209 | */ |
2210 | private static class SourceFileObject extends BaseFileObject { |
2211 | |
2212 | /** The file's name. |
2213 | */ |
2214 | private Name name; |
2215 | |
2216 | public SourceFileObject(Name name) { |
2217 | this.name = name; |
2218 | } |
2219 | |
2220 | public InputStream openInputStream() { |
2221 | throw new UnsupportedOperationException(); |
2222 | } |
2223 | |
2224 | public OutputStream openOutputStream() { |
2225 | throw new UnsupportedOperationException(); |
2226 | } |
2227 | |
2228 | public Reader openReader() { |
2229 | throw new UnsupportedOperationException(); |
2230 | } |
2231 | |
2232 | public Writer openWriter() { |
2233 | throw new UnsupportedOperationException(); |
2234 | } |
2235 | |
2236 | /** @deprecated see bug 6410637 */ |
2237 | @Deprecated |
2238 | public String getName() { |
2239 | return name.toString(); |
2240 | } |
2241 | |
2242 | public long getLastModified() { |
2243 | throw new UnsupportedOperationException(); |
2244 | } |
2245 | |
2246 | public boolean delete() { |
2247 | throw new UnsupportedOperationException(); |
2248 | } |
2249 | |
2250 | public CharBuffer getCharContent(boolean ignoreEncodingErrors) { |
2251 | throw new UnsupportedOperationException(); |
2252 | } |
2253 | |
2254 | @Override |
2255 | public boolean equals(Object other) { |
2256 | if (!(other instanceof SourceFileObject)) |
2257 | return false; |
2258 | SourceFileObject o = (SourceFileObject) other; |
2259 | return name.equals(o.name); |
2260 | } |
2261 | |
2262 | @Override |
2263 | public int hashCode() { |
2264 | return name.hashCode(); |
2265 | } |
2266 | |
2267 | public boolean isNameCompatible(String simpleName, JavaFileObject.Kind kind) { |
2268 | return true; // fail-safe mode |
2269 | } |
2270 | |
2271 | public URI toUri() { |
2272 | return URI.create(name.toString()); |
2273 | } |
2274 | |
2275 | public Reader openReader(boolean ignoreEncodingErrors) throws IOException { |
2276 | throw new UnsupportedOperationException(); |
2277 | } |
2278 | |
2279 | } |
2280 | } |