1 /*
2 * Copyright (c) 1999, 2018, 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.code;
27
28 import java.util.Collection;
29 import java.util.Collections;
30 import java.util.EnumSet;
31 import java.util.HashMap;
32 import java.util.LinkedHashMap;
33 import java.util.Map;
34
35 import javax.lang.model.element.ElementVisitor;
36
37 import com.sun.tools.javac.code.Scope.WriteableScope;
38 import com.sun.tools.javac.code.Source.Feature;
39 import com.sun.tools.javac.code.Symbol.ClassSymbol;
40 import com.sun.tools.javac.code.Symbol.Completer;
41 import com.sun.tools.javac.code.Symbol.CompletionFailure;
42 import com.sun.tools.javac.code.Symbol.MethodSymbol;
43 import com.sun.tools.javac.code.Symbol.ModuleSymbol;
44 import com.sun.tools.javac.code.Symbol.PackageSymbol;
45 import com.sun.tools.javac.code.Symbol.TypeSymbol;
46 import com.sun.tools.javac.code.Symbol.VarSymbol;
47 import com.sun.tools.javac.code.Type.BottomType;
48 import com.sun.tools.javac.code.Type.ClassType;
49 import com.sun.tools.javac.code.Type.ErrorType;
50 import com.sun.tools.javac.code.Type.JCPrimitiveType;
51 import com.sun.tools.javac.code.Type.JCVoidType;
52 import com.sun.tools.javac.code.Type.MethodType;
53 import com.sun.tools.javac.code.Type.UnknownType;
54 import com.sun.tools.javac.code.Types.UniqueType;
55 import com.sun.tools.javac.comp.Modules;
56 import com.sun.tools.javac.util.Assert;
57 import com.sun.tools.javac.util.Context;
58 import com.sun.tools.javac.util.Convert;
59 import com.sun.tools.javac.util.DefinedBy;
60 import com.sun.tools.javac.util.DefinedBy.Api;
61 import com.sun.tools.javac.util.Iterators;
62 import com.sun.tools.javac.util.JavacMessages;
63 import com.sun.tools.javac.util.List;
64 import com.sun.tools.javac.util.Name;
65 import com.sun.tools.javac.util.Names;
66
67 import static com.sun.tools.javac.code.Flags.*;
68 import static com.sun.tools.javac.code.Kinds.Kind.*;
69 import static com.sun.tools.javac.code.TypeTag.*;
70
71 /** A class that defines all predefined constants and operators
72 * as well as special classes such as java.lang.Object, which need
73 * to be known to the compiler. All symbols are held in instance
74 * fields. This makes it possible to work in multiple concurrent
75 * projects, which might use different class files for library classes.
76 *
77 * <p><b>This is NOT part of any supported API.
78 * If you write code that depends on this, you do so at your own risk.
79 * This code and its internal interfaces are subject to change or
80 * deletion without notice.</b>
81 */
82 public class Symtab {
83 /** The context key for the symbol table. */
84 protected static final Context.Key<Symtab> symtabKey = new Context.Key<>();
85
86 /** Get the symbol table instance. */
87 public static Symtab instance(Context context) {
88 Symtab instance = context.get(symtabKey);
89 if (instance == null)
90 instance = new Symtab(context);
91 return instance;
92 }
93
94 /** Builtin types.
95 */
96 public final JCPrimitiveType byteType = new JCPrimitiveType(BYTE, null);
97 public final JCPrimitiveType charType = new JCPrimitiveType(CHAR, null);
98 public final JCPrimitiveType shortType = new JCPrimitiveType(SHORT, null);
99 public final JCPrimitiveType intType = new JCPrimitiveType(INT, null);
100 public final JCPrimitiveType longType = new JCPrimitiveType(LONG, null);
101 public final JCPrimitiveType floatType = new JCPrimitiveType(FLOAT, null);
102 public final JCPrimitiveType doubleType = new JCPrimitiveType(DOUBLE, null);
103 public final JCPrimitiveType booleanType = new JCPrimitiveType(BOOLEAN, null);
104 public final Type botType = new BottomType();
105 public final JCVoidType voidType = new JCVoidType();
106
107 private final Names names;
108 private final JavacMessages messages;
109 private final Completer initialCompleter;
110 private final Completer moduleCompleter;
111
112 /** A symbol for the unnamed module.
113 */
114 public final ModuleSymbol unnamedModule;
115
116 /** The error module.
117 */
118 public final ModuleSymbol errModule;
119
120 /** A symbol for no module, for use with -source 8 or less
121 */
122 public final ModuleSymbol noModule;
123
124 /** A symbol for the root package.
125 */
126 public final PackageSymbol rootPackage;
127
128 /** A symbol that stands for a missing symbol.
129 */
130 public final TypeSymbol noSymbol;
131
132 /** The error symbol.
133 */
134 public final ClassSymbol errSymbol;
135
136 /** The unknown symbol.
137 */
138 public final ClassSymbol unknownSymbol;
139
140 /** A value for the errType, with a originalType of noType */
141 public final Type errType;
142
143 /** A value for the unknown type. */
144 public final Type unknownType;
145
146 /** The builtin type of all arrays. */
147 public final ClassSymbol arrayClass;
148 public final MethodSymbol arrayCloneMethod;
149
150 /** VGJ: The (singleton) type of all bound types. */
151 public final ClassSymbol boundClass;
152
153 /** The builtin type of all methods. */
154 public final ClassSymbol methodClass;
155
156 /** A symbol for the java.base module.
157 */
158 public final ModuleSymbol java_base;
159
160 /** Predefined types.
161 */
162 public final Type objectType;
163 public final Type objectsType;
164 public final Type classType;
165 public final Type classLoaderType;
166 public final Type stringType;
167 public final Type stringBufferType;
168 public final Type stringBuilderType;
169 public final Type cloneableType;
170 public final Type serializableType;
171 public final Type serializedLambdaType;
172 public final Type varHandleType;
173 public final Type methodHandleType;
174 public final Type methodHandleLookupType;
175 public final Type methodTypeType;
176 public final Type nativeHeaderType;
177 public final Type throwableType;
178 public final Type errorType;
179 public final Type interruptedExceptionType;
180 public final Type illegalArgumentExceptionType;
181 public final Type exceptionType;
182 public final Type runtimeExceptionType;
183 public final Type classNotFoundExceptionType;
184 public final Type noClassDefFoundErrorType;
185 public final Type noSuchFieldErrorType;
186 public final Type assertionErrorType;
187 public final Type cloneNotSupportedExceptionType;
188 public final Type annotationType;
189 public final TypeSymbol enumSym;
190 public final Type listType;
191 public final Type collectionsType;
192 public final Type comparableType;
193 public final Type comparatorType;
194 public final Type arraysType;
195 public final Type iterableType;
196 public final Type iteratorType;
197 public final Type annotationTargetType;
198 public final Type overrideType;
199 public final Type retentionType;
200 public final Type deprecatedType;
201 public final Type suppressWarningsType;
202 public final Type supplierType;
203 public final Type inheritedType;
204 public final Type profileType;
205 public final Type proprietaryType;
206 public final Type systemType;
207 public final Type autoCloseableType;
208 public final Type trustMeType;
209 public final Type lambdaMetafactory;
210 public final Type stringConcatFactory;
211 public final Type repeatableType;
212 public final Type documentedType;
213 public final Type elementTypeType;
214 public final Type functionalInterfaceType;
215
216 /** The symbol representing the length field of an array.
217 */
218 public final VarSymbol lengthVar;
219
220 /** The symbol representing the final finalize method on enums */
221 public final MethodSymbol enumFinalFinalize;
222
223 /** The symbol representing the close method on TWR AutoCloseable type */
224 public final MethodSymbol autoCloseableClose;
225
226 /** The predefined type that belongs to a tag.
227 */
228 public final Type[] typeOfTag = new Type[TypeTag.getTypeTagCount()];
229
230 /** The name of the class that belongs to a basic type tag.
231 */
232 public final Name[] boxedName = new Name[TypeTag.getTypeTagCount()];
233
234 /** A hashtable containing the encountered top-level and member classes,
235 * indexed by flat names. The table does not contain local classes.
236 * It should be updated from the outside to reflect classes defined
237 * by compiled source files.
238 */
239 private final Map<Name, Map<ModuleSymbol,ClassSymbol>> classes = new HashMap<>();
240
241 /** A hashtable containing the encountered packages.
242 * the table should be updated from outside to reflect packages defined
243 * by compiled source files.
244 */
245 private final Map<Name, Map<ModuleSymbol,PackageSymbol>> packages = new HashMap<>();
246
247 /** A hashtable giving the encountered modules.
248 */
249 private final Map<Name, ModuleSymbol> modules = new LinkedHashMap<>();
250
251 private final Map<Types.UniqueType, VarSymbol> classFields = new HashMap<>();
252
253 public VarSymbol getClassField(Type type, Types types) {
254 return classFields.computeIfAbsent(
255 new UniqueType(type, types), k -> {
256 Type arg = null;
257 if (type.getTag() == ARRAY || type.getTag() == CLASS)
258 arg = types.erasure(type);
259 else if (type.isPrimitiveOrVoid())
260 arg = types.boxedClass(type).type;
261 else
262 throw new AssertionError(type);
263
264 Type t = new ClassType(
265 classType.getEnclosingType(), List.of(arg), classType.tsym);
266 return new VarSymbol(
267 STATIC | PUBLIC | FINAL, names._class, t, type.tsym);
268 });
269 }
270
271 public void initType(Type type, ClassSymbol c) {
272 type.tsym = c;
273 typeOfTag[type.getTag().ordinal()] = type;
274 }
275
276 public void initType(Type type, String name) {
277 initType(
278 type,
279 new ClassSymbol(
280 PUBLIC, names.fromString(name), type, rootPackage));
281 }
282
283 public void initType(Type type, String name, String bname) {
284 initType(type, name);
285 boxedName[type.getTag().ordinal()] = names.fromString("java.lang." + bname);
286 }
287
288 /** The class symbol that owns all predefined symbols.
289 */
290 public final ClassSymbol predefClass;
291
292 /** Enter a class into symbol table.
293 * @param s The name of the class.
294 */
295 private Type enterClass(String s) {
296 return enterClass(java_base, names.fromString(s)).type;
297 }
298
299 public void synthesizeEmptyInterfaceIfMissing(final Type type) {
300 final Completer completer = type.tsym.completer;
301 type.tsym.completer = new Completer() {
302 @Override
303 public void complete(Symbol sym) throws CompletionFailure {
304 try {
305 completer.complete(sym);
306 } catch (CompletionFailure e) {
307 sym.flags_field |= (PUBLIC | INTERFACE);
308 ((ClassType) sym.type).supertype_field = objectType;
309 }
310 }
311
312 @Override
313 public boolean isTerminal() {
314 return completer.isTerminal();
315 }
316 };
317 }
318
319 public void synthesizeBoxTypeIfMissing(final Type type) {
320 ClassSymbol sym = enterClass(java_base, boxedName[type.getTag().ordinal()]);
321 final Completer completer = sym.completer;
322 sym.completer = new Completer() {
323 @Override
324 public void complete(Symbol sym) throws CompletionFailure {
325 try {
326 completer.complete(sym);
327 } catch (CompletionFailure e) {
328 sym.flags_field |= PUBLIC;
329 ((ClassType) sym.type).supertype_field = objectType;
330 MethodSymbol boxMethod =
331 new MethodSymbol(PUBLIC | STATIC, names.valueOf,
332 new MethodType(List.of(type), sym.type,
333 List.nil(), methodClass),
334 sym);
335 sym.members().enter(boxMethod);
336 MethodSymbol unboxMethod =
337 new MethodSymbol(PUBLIC,
338 type.tsym.name.append(names.Value), // x.intValue()
339 new MethodType(List.nil(), type,
340 List.nil(), methodClass),
341 sym);
342 sym.members().enter(unboxMethod);
343 }
344 }
345
346 @Override
347 public boolean isTerminal() {
348 return completer.isTerminal();
349 }
350 };
351 }
352
353 // Enter a synthetic class that is used to mark classes in ct.sym.
354 // This class does not have a class file.
355 private Type enterSyntheticAnnotation(String name) {
356 // for now, leave the module null, to prevent problems from synthesizing the
357 // existence of a class in any specific module, including noModule
358 ClassType type = (ClassType)enterClass(java_base, names.fromString(name)).type;
359 ClassSymbol sym = (ClassSymbol)type.tsym;
360 sym.completer = Completer.NULL_COMPLETER;
361 sym.flags_field = PUBLIC|ACYCLIC|ANNOTATION|INTERFACE;
362 sym.erasure_field = type;
363 sym.members_field = WriteableScope.create(sym);
364 type.typarams_field = List.nil();
365 type.allparams_field = List.nil();
366 type.supertype_field = annotationType;
367 type.interfaces_field = List.nil();
368 return type;
369 }
370
371 /** Constructor; enters all predefined identifiers and operators
372 * into symbol table.
373 */
374 protected Symtab(Context context) throws CompletionFailure {
375 context.put(symtabKey, this);
376
377 names = Names.instance(context);
378
379 // Create the unknown type
380 unknownType = new UnknownType();
381
382 messages = JavacMessages.instance(context);
383
384 rootPackage = new PackageSymbol(names.empty, null);
385
386 // create the basic builtin symbols
387 unnamedModule = new ModuleSymbol(names.empty, null) {
388 {
389 directives = List.nil();
390 exports = List.nil();
391 provides = List.nil();
392 uses = List.nil();
393 ModuleSymbol java_base = enterModule(names.java_base);
394 com.sun.tools.javac.code.Directive.RequiresDirective d =
395 new com.sun.tools.javac.code.Directive.RequiresDirective(java_base,
396 EnumSet.of(com.sun.tools.javac.code.Directive.RequiresFlag.MANDATED));
397 requires = List.of(d);
398 }
399 @Override
400 public String toString() {
401 return messages.getLocalizedString("compiler.misc.unnamed.module");
402 }
403 };
404 addRootPackageFor(unnamedModule);
405 unnamedModule.enclosedPackages = unnamedModule.enclosedPackages.prepend(unnamedModule.unnamedPackage);
406
407 errModule = new ModuleSymbol(names.empty, null) {
408 {
409 directives = List.nil();
410 exports = List.nil();
411 provides = List.nil();
412 uses = List.nil();
413 ModuleSymbol java_base = enterModule(names.java_base);
414 com.sun.tools.javac.code.Directive.RequiresDirective d =
415 new com.sun.tools.javac.code.Directive.RequiresDirective(java_base,
416 EnumSet.of(com.sun.tools.javac.code.Directive.RequiresFlag.MANDATED));
417 requires = List.of(d);
418 }
419 };
420 addRootPackageFor(errModule);
421
422 noModule = new ModuleSymbol(names.empty, null) {
423 @Override public boolean isNoModule() {
424 return true;
425 }
426 };
427 addRootPackageFor(noModule);
428
429 noSymbol = new TypeSymbol(NIL, 0, names.empty, Type.noType, rootPackage) {
430 @Override @DefinedBy(Api.LANGUAGE_MODEL)
431 public <R, P> R accept(ElementVisitor<R, P> v, P p) {
432 return v.visitUnknown(this, p);
433 }
434 };
435
436 // create the error symbols
437 errSymbol = new ClassSymbol(PUBLIC|STATIC|ACYCLIC, names.any, null, rootPackage);
438 errType = new ErrorType(errSymbol, Type.noType);
439
440 unknownSymbol = new ClassSymbol(PUBLIC|STATIC|ACYCLIC, names.fromString("<any?>"), null, rootPackage);
441 unknownSymbol.members_field = new Scope.ErrorScope(unknownSymbol);
442 unknownSymbol.type = unknownType;
443
444 // initialize builtin types
445 initType(byteType, "byte", "Byte");
446 initType(shortType, "short", "Short");
447 initType(charType, "char", "Character");
448 initType(intType, "int", "Integer");
449 initType(longType, "long", "Long");
450 initType(floatType, "float", "Float");
451 initType(doubleType, "double", "Double");
452 initType(booleanType, "boolean", "Boolean");
453 initType(voidType, "void", "Void");
454 initType(botType, "<nulltype>");
455 initType(errType, errSymbol);
456 initType(unknownType, unknownSymbol);
457
458 // the builtin class of all arrays
459 arrayClass = new ClassSymbol(PUBLIC|ACYCLIC, names.Array, noSymbol);
460
461 // VGJ
462 boundClass = new ClassSymbol(PUBLIC|ACYCLIC, names.Bound, noSymbol);
463 boundClass.members_field = new Scope.ErrorScope(boundClass);
464
465 // the builtin class of all methods
466 methodClass = new ClassSymbol(PUBLIC|ACYCLIC, names.Method, noSymbol);
467 methodClass.members_field = new Scope.ErrorScope(boundClass);
468
469 // Create class to hold all predefined constants and operations.
470 predefClass = new ClassSymbol(PUBLIC|ACYCLIC, names.empty, rootPackage);
471 WriteableScope scope = WriteableScope.create(predefClass);
472 predefClass.members_field = scope;
473
474 // Get the initial completer for Symbols from the ClassFinder
475 initialCompleter = ClassFinder.instance(context).getCompleter();
476 rootPackage.members_field = WriteableScope.create(rootPackage);
477
478 // Enter symbols for basic types.
479 scope.enter(byteType.tsym);
480 scope.enter(shortType.tsym);
481 scope.enter(charType.tsym);
482 scope.enter(intType.tsym);
483 scope.enter(longType.tsym);
484 scope.enter(floatType.tsym);
485 scope.enter(doubleType.tsym);
486 scope.enter(booleanType.tsym);
487 scope.enter(errType.tsym);
488
489 // Enter symbol for the errSymbol
490 scope.enter(errSymbol);
491
492 Source source = Source.instance(context);
493 if (Feature.MODULES.allowedInSource(source)) {
494 java_base = enterModule(names.java_base);
495 //avoid completing java.base during the Symtab initialization
496 java_base.completer = Completer.NULL_COMPLETER;
497 java_base.visiblePackages = Collections.emptyMap();
498 } else {
499 java_base = noModule;
500 }
501
502 // Get the initial completer for ModuleSymbols from Modules
503 moduleCompleter = Modules.instance(context).getCompleter();
504
505 // Enter predefined classes. All are assumed to be in the java.base module.
506 objectType = enterClass("java.lang.Object");
507 objectsType = enterClass("java.util.Objects");
508 classType = enterClass("java.lang.Class");
509 stringType = enterClass("java.lang.String");
510 stringBufferType = enterClass("java.lang.StringBuffer");
511 stringBuilderType = enterClass("java.lang.StringBuilder");
512 cloneableType = enterClass("java.lang.Cloneable");
513 throwableType = enterClass("java.lang.Throwable");
514 serializableType = enterClass("java.io.Serializable");
515 serializedLambdaType = enterClass("java.lang.invoke.SerializedLambda");
516 varHandleType = enterClass("java.lang.invoke.VarHandle");
517 methodHandleType = enterClass("java.lang.invoke.MethodHandle");
518 methodHandleLookupType = enterClass("java.lang.invoke.MethodHandles$Lookup");
519 methodTypeType = enterClass("java.lang.invoke.MethodType");
520 errorType = enterClass("java.lang.Error");
521 illegalArgumentExceptionType = enterClass("java.lang.IllegalArgumentException");
522 interruptedExceptionType = enterClass("java.lang.InterruptedException");
523 exceptionType = enterClass("java.lang.Exception");
524 runtimeExceptionType = enterClass("java.lang.RuntimeException");
525 classNotFoundExceptionType = enterClass("java.lang.ClassNotFoundException");
526 noClassDefFoundErrorType = enterClass("java.lang.NoClassDefFoundError");
527 noSuchFieldErrorType = enterClass("java.lang.NoSuchFieldError");
528 assertionErrorType = enterClass("java.lang.AssertionError");
529 cloneNotSupportedExceptionType = enterClass("java.lang.CloneNotSupportedException");
530 annotationType = enterClass("java.lang.annotation.Annotation");
531 classLoaderType = enterClass("java.lang.ClassLoader");
532 enumSym = enterClass(java_base, names.java_lang_Enum);
533 enumFinalFinalize =
534 new MethodSymbol(PROTECTED|FINAL|HYPOTHETICAL,
535 names.finalize,
536 new MethodType(List.nil(), voidType,
537 List.nil(), methodClass),
538 enumSym);
539 listType = enterClass("java.util.List");
540 collectionsType = enterClass("java.util.Collections");
541 comparableType = enterClass("java.lang.Comparable");
542 comparatorType = enterClass("java.util.Comparator");
543 arraysType = enterClass("java.util.Arrays");
544 iterableType = enterClass("java.lang.Iterable");
545 iteratorType = enterClass("java.util.Iterator");
546 annotationTargetType = enterClass("java.lang.annotation.Target");
547 overrideType = enterClass("java.lang.Override");
548 retentionType = enterClass("java.lang.annotation.Retention");
549 deprecatedType = enterClass("java.lang.Deprecated");
550 suppressWarningsType = enterClass("java.lang.SuppressWarnings");
551 supplierType = enterClass("java.util.function.Supplier");
552 inheritedType = enterClass("java.lang.annotation.Inherited");
553 repeatableType = enterClass("java.lang.annotation.Repeatable");
554 documentedType = enterClass("java.lang.annotation.Documented");
555 elementTypeType = enterClass("java.lang.annotation.ElementType");
556 systemType = enterClass("java.lang.System");
557 autoCloseableType = enterClass("java.lang.AutoCloseable");
558 autoCloseableClose = new MethodSymbol(PUBLIC,
559 names.close,
560 new MethodType(List.nil(), voidType,
561 List.of(exceptionType), methodClass),
562 autoCloseableType.tsym);
563 trustMeType = enterClass("java.lang.SafeVarargs");
564 nativeHeaderType = enterClass("java.lang.annotation.Native");
565 lambdaMetafactory = enterClass("java.lang.invoke.LambdaMetafactory");
566 stringConcatFactory = enterClass("java.lang.invoke.StringConcatFactory");
567 functionalInterfaceType = enterClass("java.lang.FunctionalInterface");
568
569 synthesizeEmptyInterfaceIfMissing(autoCloseableType);
570 synthesizeEmptyInterfaceIfMissing(cloneableType);
571 synthesizeEmptyInterfaceIfMissing(serializableType);
572 synthesizeEmptyInterfaceIfMissing(lambdaMetafactory);
573 synthesizeEmptyInterfaceIfMissing(serializedLambdaType);
574 synthesizeEmptyInterfaceIfMissing(stringConcatFactory);
575 synthesizeBoxTypeIfMissing(doubleType);
576 synthesizeBoxTypeIfMissing(floatType);
577 synthesizeBoxTypeIfMissing(voidType);
578
579 // Enter a synthetic class that is used to mark internal
580 // proprietary classes in ct.sym. This class does not have a
581 // class file.
582 proprietaryType = enterSyntheticAnnotation("sun.Proprietary+Annotation");
583
584 // Enter a synthetic class that is used to provide profile info for
585 // classes in ct.sym. This class does not have a class file.
586 profileType = enterSyntheticAnnotation("jdk.Profile+Annotation");
587 MethodSymbol m = new MethodSymbol(PUBLIC | ABSTRACT, names.value, intType, profileType.tsym);
588 profileType.tsym.members().enter(m);
589
590 // Enter a class for arrays.
591 // The class implements java.lang.Cloneable and java.io.Serializable.
592 // It has a final length field and a clone method.
593 ClassType arrayClassType = (ClassType)arrayClass.type;
594 arrayClassType.supertype_field = objectType;
595 arrayClassType.interfaces_field = List.of(cloneableType, serializableType);
596 arrayClass.members_field = WriteableScope.create(arrayClass);
597 lengthVar = new VarSymbol(
598 PUBLIC | FINAL,
599 names.length,
600 intType,
601 arrayClass);
602 arrayClass.members().enter(lengthVar);
603 arrayCloneMethod = new MethodSymbol(
604 PUBLIC,
605 names.clone,
606 new MethodType(List.nil(), objectType,
607 List.nil(), methodClass),
608 arrayClass);
609 arrayClass.members().enter(arrayCloneMethod);
610
611 if (java_base != noModule)
612 java_base.completer = moduleCompleter::complete; //bootstrap issues
613
614 }
615
616 /** Define a new class given its name and owner.
617 */
618 public ClassSymbol defineClass(Name name, Symbol owner) {
619 ClassSymbol c = new ClassSymbol(0, name, owner);
620 c.completer = initialCompleter;
621 return c;
622 }
623
624 /** Create a new toplevel or member class symbol with given name
625 * and owner and enter in `classes' unless already there.
626 */
627 public ClassSymbol enterClass(ModuleSymbol msym, Name name, TypeSymbol owner) {
628 Assert.checkNonNull(msym);
629 Name flatname = TypeSymbol.formFlatName(name, owner);
630 ClassSymbol c = getClass(msym, flatname);
631 if (c == null) {
632 c = defineClass(name, owner);
633 doEnterClass(msym, c);
634 } else if ((c.name != name || c.owner != owner) && owner.kind == TYP && c.owner.kind == PCK) {
635 // reassign fields of classes that might have been loaded with
636 // their flat names.
637 c.owner.members().remove(c);
638 c.name = name;
639 c.owner = owner;
640 c.fullname = ClassSymbol.formFullName(name, owner);
641 }
642 return c;
643 }
644
645 public ClassSymbol getClass(ModuleSymbol msym, Name flatName) {
646 Assert.checkNonNull(msym, flatName::toString);
647 return classes.getOrDefault(flatName, Collections.emptyMap()).get(msym);
648 }
649
650 public PackageSymbol lookupPackage(ModuleSymbol msym, Name flatName) {
651 Assert.checkNonNull(msym);
652
653 if (flatName.isEmpty()) {
654 //unnamed packages only from the current module - visiblePackages contains *root* package, not unnamed package!
655 return msym.unnamedPackage;
656 }
657
658 if (msym == noModule) {
659 return enterPackage(msym, flatName);
660 }
661
662 msym.complete();
663
664 PackageSymbol pack;
665
666 pack = msym.visiblePackages.get(flatName);
667
668 if (pack != null)
669 return pack;
670
671 pack = getPackage(msym, flatName);
672
673 if (pack != null && pack.exists())
674 return pack;
675
676 boolean dependsOnUnnamed = msym.requires != null &&
677 msym.requires.stream()
678 .map(rd -> rd.module)
679 .anyMatch(mod -> mod == unnamedModule);
680
681 if (dependsOnUnnamed) {
682 //msyms depends on the unnamed module, for which we generally don't know
683 //the list of packages it "exports" ahead of time. So try to lookup the package in the
684 //current module, and in the unnamed module and see if it exists in one of them
685 PackageSymbol unnamedPack = getPackage(unnamedModule, flatName);
686
687 if (unnamedPack != null && unnamedPack.exists()) {
688 msym.visiblePackages.put(unnamedPack.fullname, unnamedPack);
689 return unnamedPack;
690 }
691
692 pack = enterPackage(msym, flatName);
693 pack.complete();
694 if (pack.exists())
695 return pack;
696
697 unnamedPack = enterPackage(unnamedModule, flatName);
698 unnamedPack.complete();
699 if (unnamedPack.exists()) {
700 msym.visiblePackages.put(unnamedPack.fullname, unnamedPack);
701 return unnamedPack;
702 }
703
704 return pack;
705 }
706
707 return enterPackage(msym, flatName);
708 }
709
710 private static final Map<ModuleSymbol, ClassSymbol> EMPTY = new HashMap<>();
711
712 public void removeClass(ModuleSymbol msym, Name flatName) {
713 classes.getOrDefault(flatName, EMPTY).remove(msym);
714 }
715
716 public Iterable<ClassSymbol> getAllClasses() {
717 return () -> Iterators.createCompoundIterator(classes.values(), v -> v.values().iterator());
718 }
719
720 private void doEnterClass(ModuleSymbol msym, ClassSymbol cs) {
721 classes.computeIfAbsent(cs.flatname, n -> new HashMap<>()).put(msym, cs);
722 }
723
724 /** Create a new member or toplevel class symbol with given flat name
725 * and enter in `classes' unless already there.
726 */
727 public ClassSymbol enterClass(ModuleSymbol msym, Name flatname) {
728 Assert.checkNonNull(msym);
729 PackageSymbol ps = lookupPackage(msym, Convert.packagePart(flatname));
730 Assert.checkNonNull(ps);
731 Assert.checkNonNull(ps.modle);
732 ClassSymbol c = getClass(ps.modle, flatname);
733 if (c == null) {
734 c = defineClass(Convert.shortName(flatname), ps);
735 doEnterClass(ps.modle, c);
736 return c;
737 } else
738 return c;
739 }
740
741 /** Check to see if a package exists, given its fully qualified name.
742 */
743 public boolean packageExists(ModuleSymbol msym, Name fullname) {
744 Assert.checkNonNull(msym);
745 return lookupPackage(msym, fullname).exists();
746 }
747
748 /** Make a package, given its fully qualified name.
749 */
750 public PackageSymbol enterPackage(ModuleSymbol currModule, Name fullname) {
751 Assert.checkNonNull(currModule);
752 PackageSymbol p = getPackage(currModule, fullname);
753 if (p == null) {
754 Assert.check(!fullname.isEmpty(), () -> "rootPackage missing!; currModule: " + currModule);
755 p = new PackageSymbol(
756 Convert.shortName(fullname),
757 enterPackage(currModule, Convert.packagePart(fullname)));
758 p.completer = initialCompleter;
759 p.modle = currModule;
760 doEnterPackage(currModule, p);
761 }
762 return p;
763 }
764
765 private void doEnterPackage(ModuleSymbol msym, PackageSymbol pack) {
766 packages.computeIfAbsent(pack.fullname, n -> new HashMap<>()).put(msym, pack);
767 msym.enclosedPackages = msym.enclosedPackages.prepend(pack);
768 }
769
770 private void addRootPackageFor(ModuleSymbol module) {
771 doEnterPackage(module, rootPackage);
772 PackageSymbol unnamedPackage = new PackageSymbol(names.empty, rootPackage) {
773 @Override
774 public String toString() {
775 return messages.getLocalizedString("compiler.misc.unnamed.package");
776 }
777 };
778 unnamedPackage.modle = module;
779 //we cannot use a method reference below, as initialCompleter might be null now
780 unnamedPackage.completer = s -> initialCompleter.complete(s);
781 module.unnamedPackage = unnamedPackage;
782 }
783
784 public PackageSymbol getPackage(ModuleSymbol module, Name fullname) {
785 return packages.getOrDefault(fullname, Collections.emptyMap()).get(module);
786 }
787
788 public ModuleSymbol enterModule(Name name) {
789 ModuleSymbol msym = modules.get(name);
790 if (msym == null) {
791 msym = ModuleSymbol.create(name, names.module_info);
792 addRootPackageFor(msym);
793 msym.completer = s -> moduleCompleter.complete(s); //bootstrap issues
794 modules.put(name, msym);
795 }
796 return msym;
797 }
798
799 public ModuleSymbol getModule(Name name) {
800 return modules.get(name);
801 }
802
803 //temporary:
804 public ModuleSymbol inferModule(Name packageName) {
805 if (packageName.isEmpty())
806 return java_base == noModule ? noModule : unnamedModule;//!
807
808 ModuleSymbol msym = null;
809 Map<ModuleSymbol,PackageSymbol> map = packages.get(packageName);
810 if (map == null)
811 return null;
812 for (Map.Entry<ModuleSymbol,PackageSymbol> e: map.entrySet()) {
813 if (!e.getValue().members().isEmpty()) {
814 if (msym == null) {
815 msym = e.getKey();
816 } else {
817 return null;
818 }
819 }
820 }
821 return msym;
822 }
823
824 public List<ModuleSymbol> listPackageModules(Name packageName) {
825 if (packageName.isEmpty())
826 return List.nil();
827
828 List<ModuleSymbol> result = List.nil();
829 Map<ModuleSymbol,PackageSymbol> map = packages.get(packageName);
830 if (map != null) {
831 for (Map.Entry<ModuleSymbol, PackageSymbol> e: map.entrySet()) {
832 if (!e.getValue().members().isEmpty()) {
833 result = result.prepend(e.getKey());
834 }
835 }
836 }
837 return result;
838 }
839
840 public Collection<ModuleSymbol> getAllModules() {
841 return modules.values();
842 }
843
844 public Iterable<ClassSymbol> getClassesForName(Name candidate) {
845 return classes.getOrDefault(candidate, Collections.emptyMap()).values();
846 }
847
848 public Iterable<PackageSymbol> getPackagesForName(Name candidate) {
849 return packages.getOrDefault(candidate, Collections.emptyMap()).values();
850 }
851 }