1 /*
2 * Copyright (c) 1999, 2019, 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.RootPackageSymbol;
46 import com.sun.tools.javac.code.Symbol.TypeSymbol;
47 import com.sun.tools.javac.code.Symbol.VarSymbol;
48 import com.sun.tools.javac.code.Type.BottomType;
49 import com.sun.tools.javac.code.Type.ClassType;
50 import com.sun.tools.javac.code.Type.ErrorType;
51 import com.sun.tools.javac.code.Type.JCPrimitiveType;
52 import com.sun.tools.javac.code.Type.JCVoidType;
53 import com.sun.tools.javac.code.Type.MethodType;
54 import com.sun.tools.javac.code.Type.UnknownType;
55 import com.sun.tools.javac.code.Types.UniqueType;
56 import com.sun.tools.javac.comp.Modules;
57 import com.sun.tools.javac.jvm.Target;
58 import com.sun.tools.javac.util.Assert;
59 import com.sun.tools.javac.util.Context;
60 import com.sun.tools.javac.util.Convert;
61 import com.sun.tools.javac.util.DefinedBy;
62 import com.sun.tools.javac.util.DefinedBy.Api;
63 import com.sun.tools.javac.util.Iterators;
64 import com.sun.tools.javac.util.JavacMessages;
65 import com.sun.tools.javac.util.List;
66 import com.sun.tools.javac.util.Name;
67 import com.sun.tools.javac.util.Names;
68
69 import static com.sun.tools.javac.code.Flags.*;
70 import static com.sun.tools.javac.code.Kinds.Kind.*;
71 import static com.sun.tools.javac.code.TypeTag.*;
72
73 /** A class that defines all predefined constants and operators
74 * as well as special classes such as java.lang.Object, which need
75 * to be known to the compiler. All symbols are held in instance
76 * fields. This makes it possible to work in multiple concurrent
77 * projects, which might use different class files for library classes.
78 *
79 * <p><b>This is NOT part of any supported API.
80 * If you write code that depends on this, you do so at your own risk.
81 * This code and its internal interfaces are subject to change or
82 * deletion without notice.</b>
83 */
84 public class Symtab {
85 /** The context key for the symbol table. */
86 protected static final Context.Key<Symtab> symtabKey = new Context.Key<>();
87
88 /** Get the symbol table instance. */
89 public static Symtab instance(Context context) {
90 Symtab instance = context.get(symtabKey);
91 if (instance == null)
92 instance = new Symtab(context);
93 return instance;
94 }
95
96 /** Builtin types.
97 */
98 public final JCPrimitiveType byteType = new JCPrimitiveType(BYTE, null);
99 public final JCPrimitiveType charType = new JCPrimitiveType(CHAR, null);
100 public final JCPrimitiveType shortType = new JCPrimitiveType(SHORT, null);
101 public final JCPrimitiveType intType = new JCPrimitiveType(INT, null);
102 public final JCPrimitiveType longType = new JCPrimitiveType(LONG, null);
103 public final JCPrimitiveType floatType = new JCPrimitiveType(FLOAT, null);
104 public final JCPrimitiveType doubleType = new JCPrimitiveType(DOUBLE, null);
105 public final JCPrimitiveType booleanType = new JCPrimitiveType(BOOLEAN, null);
106 public final Type botType = new BottomType();
107 public final JCVoidType voidType = new JCVoidType();
108
109 private final Names names;
110 private final JavacMessages messages;
111 private final Completer initialCompleter;
112 private final Completer moduleCompleter;
113
114 /** A symbol for the unnamed module.
115 */
116 public final ModuleSymbol unnamedModule;
117
118 /** The error module.
119 */
120 public final ModuleSymbol errModule;
121
122 /** A symbol for no module, for use with -source 8 or less
123 */
124 public final ModuleSymbol noModule;
125
126 /** A symbol for the root package.
127 */
128 public final PackageSymbol rootPackage;
129
130 /** A symbol that stands for a missing symbol.
131 */
132 public final TypeSymbol noSymbol;
133
134 /** The error symbol.
135 */
136 public final ClassSymbol errSymbol;
137
138 /** The unknown symbol.
139 */
140 public final ClassSymbol unknownSymbol;
141
142 /** A value for the errType, with a originalType of noType */
143 public final Type errType;
144
145 /** A value for the unknown type. */
146 public final Type unknownType;
147
148 /** The builtin type of all arrays. */
149 public final ClassSymbol arrayClass;
150 public final MethodSymbol arrayCloneMethod;
151
152 /** VGJ: The (singleton) type of all bound types. */
153 public final ClassSymbol boundClass;
154
155 /** The builtin type of all methods. */
156 public final ClassSymbol methodClass;
157
158 /** A symbol for the java.base module.
159 */
160 public final ModuleSymbol java_base;
161
162 /** Predefined types.
163 */
164 public final Type objectType;
165 public final Type objectMethodsType;
166 public final Type objectsType;
167 public final Type classType;
168 public final Type classLoaderType;
169 public final Type stringType;
170 public final Type stringBufferType;
171 public final Type stringBuilderType;
172 public final Type cloneableType;
173 public final Type serializableType;
174 public final Type serializedLambdaType;
175 public final Type varHandleType;
176 public final Type methodHandleType;
177 public final Type methodHandleLookupType;
178 public final Type methodTypeType;
179 public final Type nativeHeaderType;
180 public final Type throwableType;
181 public final Type errorType;
182 public final Type interruptedExceptionType;
183 public final Type illegalArgumentExceptionType;
184 public final Type exceptionType;
185 public final Type runtimeExceptionType;
186 public final Type classNotFoundExceptionType;
187 public final Type noClassDefFoundErrorType;
188 public final Type noSuchFieldErrorType;
189 public final Type assertionErrorType;
190 public final Type incompatibleClassChangeErrorType;
191 public final Type cloneNotSupportedExceptionType;
192 public final Type annotationType;
193 public final TypeSymbol enumSym;
194 public final Type listType;
195 public final Type collectionsType;
196 public final Type comparableType;
197 public final Type comparatorType;
198 public final Type arraysType;
199 public final Type iterableType;
200 public final Type iteratorType;
201 public final Type annotationTargetType;
202 public final Type overrideType;
203 public final Type retentionType;
204 public final Type deprecatedType;
205 public final Type suppressWarningsType;
206 public final Type supplierType;
207 public final Type inheritedType;
208 public final Type profileType;
209 public final Type proprietaryType;
210 public final Type systemType;
211 public final Type autoCloseableType;
212 public final Type trustMeType;
213 public final Type lambdaMetafactory;
214 public final Type stringConcatFactory;
215 public final Type repeatableType;
216 public final Type documentedType;
217 public final Type elementTypeType;
218 public final Type functionalInterfaceType;
219 public final Type previewFeatureType;
220 public final Type typeDescriptorType;
221 public final Type recordType;
222
223 /** The symbol representing the length field of an array.
224 */
225 public final VarSymbol lengthVar;
226
227 /** The symbol representing the final finalize method on enums */
228 public final MethodSymbol enumFinalFinalize;
229
230 /** The symbol representing the close method on TWR AutoCloseable type */
231 public final MethodSymbol autoCloseableClose;
232
233 /** The predefined type that belongs to a tag.
234 */
235 public final Type[] typeOfTag = new Type[TypeTag.getTypeTagCount()];
236
237 /** The name of the class that belongs to a basic type tag.
238 */
239 public final Name[] boxedName = new Name[TypeTag.getTypeTagCount()];
240
241 /** A hashtable containing the encountered top-level and member classes,
242 * indexed by flat names. The table does not contain local classes.
243 * It should be updated from the outside to reflect classes defined
244 * by compiled source files.
245 */
246 private final Map<Name, Map<ModuleSymbol,ClassSymbol>> classes = new HashMap<>();
247
248 /** A hashtable containing the encountered packages.
249 * the table should be updated from outside to reflect packages defined
250 * by compiled source files.
251 */
252 private final Map<Name, Map<ModuleSymbol,PackageSymbol>> packages = new HashMap<>();
253
254 /** A hashtable giving the encountered modules.
255 */
256 private final Map<Name, ModuleSymbol> modules = new LinkedHashMap<>();
257
258 private final Map<Types.UniqueType, VarSymbol> classFields = new HashMap<>();
259
260 public VarSymbol getClassField(Type type, Types types) {
261 return classFields.computeIfAbsent(
262 new UniqueType(type, types), k -> {
263 Type arg = null;
264 if (type.getTag() == ARRAY || type.getTag() == CLASS)
265 arg = types.erasure(type);
266 else if (type.isPrimitiveOrVoid())
267 arg = types.boxedClass(type).type;
268 else
269 throw new AssertionError(type);
270
271 Type t = new ClassType(
272 classType.getEnclosingType(), List.of(arg), classType.tsym);
273 return new VarSymbol(
274 STATIC | PUBLIC | FINAL, names._class, t, type.tsym);
275 });
276 }
277
278 public void initType(Type type, ClassSymbol c) {
279 type.tsym = c;
280 typeOfTag[type.getTag().ordinal()] = type;
281 }
282
283 public void initType(Type type, String name) {
284 initType(
285 type,
286 new ClassSymbol(
287 PUBLIC, names.fromString(name), type, rootPackage));
288 }
289
290 public void initType(Type type, String name, String bname) {
291 initType(type, name);
292 boxedName[type.getTag().ordinal()] = names.fromString("java.lang." + bname);
293 }
294
295 /** The class symbol that owns all predefined symbols.
296 */
297 public final ClassSymbol predefClass;
298
299 /** Enter a class into symbol table.
300 * @param s The name of the class.
301 */
302 private Type enterClass(String s) {
303 return enterClass(java_base, names.fromString(s)).type;
304 }
305
306 public void synthesizeEmptyInterfaceIfMissing(final Type type) {
307 final Completer completer = type.tsym.completer;
308 type.tsym.completer = new Completer() {
309 @Override
310 public void complete(Symbol sym) throws CompletionFailure {
311 try {
312 completer.complete(sym);
313 } catch (CompletionFailure e) {
314 sym.flags_field |= (PUBLIC | INTERFACE);
315 ((ClassType) sym.type).supertype_field = objectType;
316 }
317 }
318
319 @Override
320 public boolean isTerminal() {
321 return completer.isTerminal();
322 }
323 };
324 }
325
326 public void synthesizeBoxTypeIfMissing(final Type type) {
327 ClassSymbol sym = enterClass(java_base, boxedName[type.getTag().ordinal()]);
328 final Completer completer = sym.completer;
329 sym.completer = new Completer() {
330 @Override
331 public void complete(Symbol sym) throws CompletionFailure {
332 try {
333 completer.complete(sym);
334 } catch (CompletionFailure e) {
335 sym.flags_field |= PUBLIC;
336 ((ClassType) sym.type).supertype_field = objectType;
337 MethodSymbol boxMethod =
338 new MethodSymbol(PUBLIC | STATIC, names.valueOf,
339 new MethodType(List.of(type), sym.type,
340 List.nil(), methodClass),
341 sym);
342 sym.members().enter(boxMethod);
343 MethodSymbol unboxMethod =
344 new MethodSymbol(PUBLIC,
345 type.tsym.name.append(names.Value), // x.intValue()
346 new MethodType(List.nil(), type,
347 List.nil(), methodClass),
348 sym);
349 sym.members().enter(unboxMethod);
350 }
351 }
352
353 @Override
354 public boolean isTerminal() {
355 return completer.isTerminal();
356 }
357 };
358 }
359
360 // Enter a synthetic class that is used to mark classes in ct.sym.
361 // This class does not have a class file.
362 private Type enterSyntheticAnnotation(String name) {
363 // for now, leave the module null, to prevent problems from synthesizing the
364 // existence of a class in any specific module, including noModule
365 ClassType type = (ClassType)enterClass(java_base, names.fromString(name)).type;
366 ClassSymbol sym = (ClassSymbol)type.tsym;
367 sym.completer = Completer.NULL_COMPLETER;
368 sym.flags_field = PUBLIC|ACYCLIC|ANNOTATION|INTERFACE;
369 sym.erasure_field = type;
370 sym.members_field = WriteableScope.create(sym);
371 type.typarams_field = List.nil();
372 type.allparams_field = List.nil();
373 type.supertype_field = annotationType;
374 type.interfaces_field = List.nil();
375 return type;
376 }
377
378 /** Constructor; enters all predefined identifiers and operators
379 * into symbol table.
380 */
381 protected Symtab(Context context) throws CompletionFailure {
382 context.put(symtabKey, this);
383
384 names = Names.instance(context);
385
386 // Create the unknown type
387 unknownType = new UnknownType();
388
389 messages = JavacMessages.instance(context);
390
391 MissingInfoHandler missingInfoHandler = MissingInfoHandler.instance(context);
392
393 Target target = Target.instance(context);
394 rootPackage = new RootPackageSymbol(names.empty, null,
395 missingInfoHandler,
396 target.runtimeUseNestAccess());
397
398 // create the basic builtin symbols
399 unnamedModule = new ModuleSymbol(names.empty, null) {
400 {
401 directives = List.nil();
402 exports = List.nil();
403 provides = List.nil();
404 uses = List.nil();
405 ModuleSymbol java_base = enterModule(names.java_base);
406 com.sun.tools.javac.code.Directive.RequiresDirective d =
407 new com.sun.tools.javac.code.Directive.RequiresDirective(java_base,
408 EnumSet.of(com.sun.tools.javac.code.Directive.RequiresFlag.MANDATED));
409 requires = List.of(d);
410 }
411 @Override
412 public String toString() {
413 return messages.getLocalizedString("compiler.misc.unnamed.module");
414 }
415 };
416 addRootPackageFor(unnamedModule);
417 unnamedModule.enclosedPackages = unnamedModule.enclosedPackages.prepend(unnamedModule.unnamedPackage);
418
419 errModule = new ModuleSymbol(names.empty, null) {
420 {
421 directives = List.nil();
422 exports = List.nil();
423 provides = List.nil();
424 uses = List.nil();
425 ModuleSymbol java_base = enterModule(names.java_base);
426 com.sun.tools.javac.code.Directive.RequiresDirective d =
427 new com.sun.tools.javac.code.Directive.RequiresDirective(java_base,
428 EnumSet.of(com.sun.tools.javac.code.Directive.RequiresFlag.MANDATED));
429 requires = List.of(d);
430 }
431 };
432 addRootPackageFor(errModule);
433
434 noModule = new ModuleSymbol(names.empty, null) {
435 @Override public boolean isNoModule() {
436 return true;
437 }
438 };
439 addRootPackageFor(noModule);
440
441 noSymbol = new TypeSymbol(NIL, 0, names.empty, Type.noType, rootPackage) {
442 @Override @DefinedBy(Api.LANGUAGE_MODEL)
443 public <R, P> R accept(ElementVisitor<R, P> v, P p) {
444 return v.visitUnknown(this, p);
445 }
446 };
447
448 // create the error symbols
449 errSymbol = new ClassSymbol(PUBLIC|STATIC|ACYCLIC, names.any, null, rootPackage);
450 errType = new ErrorType(errSymbol, Type.noType);
451
452 unknownSymbol = new ClassSymbol(PUBLIC|STATIC|ACYCLIC, names.fromString("<any?>"), null, rootPackage);
453 unknownSymbol.members_field = new Scope.ErrorScope(unknownSymbol);
454 unknownSymbol.type = unknownType;
455
456 // initialize builtin types
457 initType(byteType, "byte", "Byte");
458 initType(shortType, "short", "Short");
459 initType(charType, "char", "Character");
460 initType(intType, "int", "Integer");
461 initType(longType, "long", "Long");
462 initType(floatType, "float", "Float");
463 initType(doubleType, "double", "Double");
464 initType(booleanType, "boolean", "Boolean");
465 initType(voidType, "void", "Void");
466 initType(botType, "<nulltype>");
467 initType(errType, errSymbol);
468 initType(unknownType, unknownSymbol);
469
470 // the builtin class of all arrays
471 arrayClass = new ClassSymbol(PUBLIC|ACYCLIC, names.Array, noSymbol);
472
473 // VGJ
474 boundClass = new ClassSymbol(PUBLIC|ACYCLIC, names.Bound, noSymbol);
475 boundClass.members_field = new Scope.ErrorScope(boundClass);
476
477 // the builtin class of all methods
478 methodClass = new ClassSymbol(PUBLIC|ACYCLIC, names.Method, noSymbol);
479 methodClass.members_field = new Scope.ErrorScope(boundClass);
480
481 // Create class to hold all predefined constants and operations.
482 predefClass = new ClassSymbol(PUBLIC|ACYCLIC, names.empty, rootPackage);
483 WriteableScope scope = WriteableScope.create(predefClass);
484 predefClass.members_field = scope;
485
486 // Get the initial completer for Symbols from the ClassFinder
487 initialCompleter = ClassFinder.instance(context).getCompleter();
488 rootPackage.members_field = WriteableScope.create(rootPackage);
489
490 // Enter symbols for basic types.
491 scope.enter(byteType.tsym);
492 scope.enter(shortType.tsym);
493 scope.enter(charType.tsym);
494 scope.enter(intType.tsym);
495 scope.enter(longType.tsym);
496 scope.enter(floatType.tsym);
497 scope.enter(doubleType.tsym);
498 scope.enter(booleanType.tsym);
499 scope.enter(errType.tsym);
500
501 // Enter symbol for the errSymbol
502 scope.enter(errSymbol);
503
504 Source source = Source.instance(context);
505 if (Feature.MODULES.allowedInSource(source)) {
506 java_base = enterModule(names.java_base);
507 //avoid completing java.base during the Symtab initialization
508 java_base.completer = Completer.NULL_COMPLETER;
509 java_base.visiblePackages = Collections.emptyMap();
510 } else {
511 java_base = noModule;
512 }
513
514 // Get the initial completer for ModuleSymbols from Modules
515 moduleCompleter = Modules.instance(context).getCompleter();
516
517 // Enter predefined classes. All are assumed to be in the java.base module.
518 objectType = enterClass("java.lang.Object");
519 objectMethodsType = enterClass("java.lang.runtime.ObjectMethods");
520 objectsType = enterClass("java.util.Objects");
521 classType = enterClass("java.lang.Class");
522 stringType = enterClass("java.lang.String");
523 stringBufferType = enterClass("java.lang.StringBuffer");
524 stringBuilderType = enterClass("java.lang.StringBuilder");
525 cloneableType = enterClass("java.lang.Cloneable");
526 throwableType = enterClass("java.lang.Throwable");
527 serializableType = enterClass("java.io.Serializable");
528 serializedLambdaType = enterClass("java.lang.invoke.SerializedLambda");
529 varHandleType = enterClass("java.lang.invoke.VarHandle");
530 methodHandleType = enterClass("java.lang.invoke.MethodHandle");
531 methodHandleLookupType = enterClass("java.lang.invoke.MethodHandles$Lookup");
532 methodTypeType = enterClass("java.lang.invoke.MethodType");
533 errorType = enterClass("java.lang.Error");
534 illegalArgumentExceptionType = enterClass("java.lang.IllegalArgumentException");
535 interruptedExceptionType = enterClass("java.lang.InterruptedException");
536 exceptionType = enterClass("java.lang.Exception");
537 runtimeExceptionType = enterClass("java.lang.RuntimeException");
538 classNotFoundExceptionType = enterClass("java.lang.ClassNotFoundException");
539 noClassDefFoundErrorType = enterClass("java.lang.NoClassDefFoundError");
540 noSuchFieldErrorType = enterClass("java.lang.NoSuchFieldError");
541 assertionErrorType = enterClass("java.lang.AssertionError");
542 incompatibleClassChangeErrorType = enterClass("java.lang.IncompatibleClassChangeError");
543 cloneNotSupportedExceptionType = enterClass("java.lang.CloneNotSupportedException");
544 annotationType = enterClass("java.lang.annotation.Annotation");
545 classLoaderType = enterClass("java.lang.ClassLoader");
546 enumSym = enterClass(java_base, names.java_lang_Enum);
547 enumFinalFinalize =
548 new MethodSymbol(PROTECTED|FINAL|HYPOTHETICAL,
549 names.finalize,
550 new MethodType(List.nil(), voidType,
551 List.nil(), methodClass),
552 enumSym);
553 listType = enterClass("java.util.List");
554 collectionsType = enterClass("java.util.Collections");
555 comparableType = enterClass("java.lang.Comparable");
556 comparatorType = enterClass("java.util.Comparator");
557 arraysType = enterClass("java.util.Arrays");
558 iterableType = enterClass("java.lang.Iterable");
559 iteratorType = enterClass("java.util.Iterator");
560 annotationTargetType = enterClass("java.lang.annotation.Target");
561 overrideType = enterClass("java.lang.Override");
562 retentionType = enterClass("java.lang.annotation.Retention");
563 deprecatedType = enterClass("java.lang.Deprecated");
564 suppressWarningsType = enterClass("java.lang.SuppressWarnings");
565 supplierType = enterClass("java.util.function.Supplier");
566 inheritedType = enterClass("java.lang.annotation.Inherited");
567 repeatableType = enterClass("java.lang.annotation.Repeatable");
568 documentedType = enterClass("java.lang.annotation.Documented");
569 elementTypeType = enterClass("java.lang.annotation.ElementType");
570 systemType = enterClass("java.lang.System");
571 autoCloseableType = enterClass("java.lang.AutoCloseable");
572 autoCloseableClose = new MethodSymbol(PUBLIC,
573 names.close,
574 new MethodType(List.nil(), voidType,
575 List.of(exceptionType), methodClass),
576 autoCloseableType.tsym);
577 trustMeType = enterClass("java.lang.SafeVarargs");
578 nativeHeaderType = enterClass("java.lang.annotation.Native");
579 lambdaMetafactory = enterClass("java.lang.invoke.LambdaMetafactory");
580 stringConcatFactory = enterClass("java.lang.invoke.StringConcatFactory");
581 functionalInterfaceType = enterClass("java.lang.FunctionalInterface");
582 previewFeatureType = enterClass("jdk.internal.PreviewFeature");
583 typeDescriptorType = enterClass("java.lang.invoke.TypeDescriptor");
584 recordType = enterClass("java.lang.Record");
585
586 synthesizeEmptyInterfaceIfMissing(autoCloseableType);
587 synthesizeEmptyInterfaceIfMissing(cloneableType);
588 synthesizeEmptyInterfaceIfMissing(serializableType);
589 synthesizeEmptyInterfaceIfMissing(lambdaMetafactory);
590 synthesizeEmptyInterfaceIfMissing(serializedLambdaType);
591 synthesizeEmptyInterfaceIfMissing(stringConcatFactory);
592 synthesizeBoxTypeIfMissing(doubleType);
593 synthesizeBoxTypeIfMissing(floatType);
594 synthesizeBoxTypeIfMissing(voidType);
595
596 // Enter a synthetic class that is used to mark internal
597 // proprietary classes in ct.sym. This class does not have a
598 // class file.
599 proprietaryType = enterSyntheticAnnotation("sun.Proprietary+Annotation");
600
601 // Enter a synthetic class that is used to provide profile info for
602 // classes in ct.sym. This class does not have a class file.
603 profileType = enterSyntheticAnnotation("jdk.Profile+Annotation");
604 MethodSymbol m = new MethodSymbol(PUBLIC | ABSTRACT, names.value, intType, profileType.tsym);
605 profileType.tsym.members().enter(m);
606
607 // Enter a class for arrays.
608 // The class implements java.lang.Cloneable and java.io.Serializable.
609 // It has a final length field and a clone method.
610 ClassType arrayClassType = (ClassType)arrayClass.type;
611 arrayClassType.supertype_field = objectType;
612 arrayClassType.interfaces_field = List.of(cloneableType, serializableType);
613 arrayClass.members_field = WriteableScope.create(arrayClass);
614 lengthVar = new VarSymbol(
615 PUBLIC | FINAL,
616 names.length,
617 intType,
618 arrayClass);
619 arrayClass.members().enter(lengthVar);
620 arrayCloneMethod = new MethodSymbol(
621 PUBLIC,
622 names.clone,
623 new MethodType(List.nil(), objectType,
624 List.nil(), methodClass),
625 arrayClass);
626 arrayClass.members().enter(arrayCloneMethod);
627
628 if (java_base != noModule)
629 java_base.completer = moduleCompleter::complete; //bootstrap issues
630
631 }
632
633 /** Define a new class given its name and owner.
634 */
635 public ClassSymbol defineClass(Name name, Symbol owner) {
636 ClassSymbol c = new ClassSymbol(0, name, owner);
637 c.completer = initialCompleter;
638 return c;
639 }
640
641 /** Create a new toplevel or member class symbol with given name
642 * and owner and enter in `classes' unless already there.
643 */
644 public ClassSymbol enterClass(ModuleSymbol msym, Name name, TypeSymbol owner) {
645 Assert.checkNonNull(msym);
646 Name flatname = TypeSymbol.formFlatName(name, owner);
647 ClassSymbol c = getClass(msym, flatname);
648 if (c == null) {
649 c = defineClass(name, owner);
650 doEnterClass(msym, c);
651 } else if ((c.name != name || c.owner != owner) && owner.kind == TYP && c.owner.kind == PCK) {
652 // reassign fields of classes that might have been loaded with
653 // their flat names.
654 c.owner.members().remove(c);
655 c.name = name;
656 c.owner = owner;
657 c.fullname = ClassSymbol.formFullName(name, owner);
658 }
659 return c;
660 }
661
662 public ClassSymbol getClass(ModuleSymbol msym, Name flatName) {
663 Assert.checkNonNull(msym, flatName::toString);
664 return classes.getOrDefault(flatName, Collections.emptyMap()).get(msym);
665 }
666
667 public PackageSymbol lookupPackage(ModuleSymbol msym, Name flatName) {
668 Assert.checkNonNull(msym);
669
670 if (flatName.isEmpty()) {
671 //unnamed packages only from the current module - visiblePackages contains *root* package, not unnamed package!
672 return msym.unnamedPackage;
673 }
674
675 if (msym == noModule) {
676 return enterPackage(msym, flatName);
677 }
678
679 msym.complete();
680
681 PackageSymbol pack;
682
683 pack = msym.visiblePackages.get(flatName);
684
685 if (pack != null)
686 return pack;
687
688 pack = getPackage(msym, flatName);
689
690 if (pack != null && pack.exists())
691 return pack;
692
693 boolean dependsOnUnnamed = msym.requires != null &&
694 msym.requires.stream()
695 .map(rd -> rd.module)
696 .anyMatch(mod -> mod == unnamedModule);
697
698 if (dependsOnUnnamed) {
699 //msyms depends on the unnamed module, for which we generally don't know
700 //the list of packages it "exports" ahead of time. So try to lookup the package in the
701 //current module, and in the unnamed module and see if it exists in one of them
702 PackageSymbol unnamedPack = getPackage(unnamedModule, flatName);
703
704 if (unnamedPack != null && unnamedPack.exists()) {
705 msym.visiblePackages.put(unnamedPack.fullname, unnamedPack);
706 return unnamedPack;
707 }
708
709 pack = enterPackage(msym, flatName);
710 pack.complete();
711 if (pack.exists())
712 return pack;
713
714 unnamedPack = enterPackage(unnamedModule, flatName);
715 unnamedPack.complete();
716 if (unnamedPack.exists()) {
717 msym.visiblePackages.put(unnamedPack.fullname, unnamedPack);
718 return unnamedPack;
719 }
720
721 return pack;
722 }
723
724 return enterPackage(msym, flatName);
725 }
726
727 private static final Map<ModuleSymbol, ClassSymbol> EMPTY = new HashMap<>();
728
729 public void removeClass(ModuleSymbol msym, Name flatName) {
730 classes.getOrDefault(flatName, EMPTY).remove(msym);
731 }
732
733 public Iterable<ClassSymbol> getAllClasses() {
734 return () -> Iterators.createCompoundIterator(classes.values(), v -> v.values().iterator());
735 }
736
737 private void doEnterClass(ModuleSymbol msym, ClassSymbol cs) {
738 classes.computeIfAbsent(cs.flatname, n -> new HashMap<>()).put(msym, cs);
739 }
740
741 /** Create a new member or toplevel class symbol with given flat name
742 * and enter in `classes' unless already there.
743 */
744 public ClassSymbol enterClass(ModuleSymbol msym, Name flatname) {
745 Assert.checkNonNull(msym);
746 PackageSymbol ps = lookupPackage(msym, Convert.packagePart(flatname));
747 Assert.checkNonNull(ps);
748 Assert.checkNonNull(ps.modle);
749 ClassSymbol c = getClass(ps.modle, flatname);
750 if (c == null) {
751 c = defineClass(Convert.shortName(flatname), ps);
752 doEnterClass(ps.modle, c);
753 return c;
754 } else
755 return c;
756 }
757
758 /** Check to see if a package exists, given its fully qualified name.
759 */
760 public boolean packageExists(ModuleSymbol msym, Name fullname) {
761 Assert.checkNonNull(msym);
762 return lookupPackage(msym, fullname).exists();
763 }
764
765 /** Make a package, given its fully qualified name.
766 */
767 public PackageSymbol enterPackage(ModuleSymbol currModule, Name fullname) {
768 Assert.checkNonNull(currModule);
769 PackageSymbol p = getPackage(currModule, fullname);
770 if (p == null) {
771 Assert.check(!fullname.isEmpty(), () -> "rootPackage missing!; currModule: " + currModule);
772 p = new PackageSymbol(
773 Convert.shortName(fullname),
774 enterPackage(currModule, Convert.packagePart(fullname)));
775 p.completer = initialCompleter;
776 p.modle = currModule;
777 doEnterPackage(currModule, p);
778 }
779 return p;
780 }
781
782 private void doEnterPackage(ModuleSymbol msym, PackageSymbol pack) {
783 packages.computeIfAbsent(pack.fullname, n -> new HashMap<>()).put(msym, pack);
784 msym.enclosedPackages = msym.enclosedPackages.prepend(pack);
785 }
786
787 private void addRootPackageFor(ModuleSymbol module) {
788 doEnterPackage(module, rootPackage);
789 PackageSymbol unnamedPackage = new PackageSymbol(names.empty, rootPackage) {
790 @Override
791 public String toString() {
792 return messages.getLocalizedString("compiler.misc.unnamed.package");
793 }
794 };
795 unnamedPackage.modle = module;
796 //we cannot use a method reference below, as initialCompleter might be null now
797 unnamedPackage.completer = s -> initialCompleter.complete(s);
798 unnamedPackage.flags_field |= EXISTS;
799 module.unnamedPackage = unnamedPackage;
800 }
801
802 public PackageSymbol getPackage(ModuleSymbol module, Name fullname) {
803 return packages.getOrDefault(fullname, Collections.emptyMap()).get(module);
804 }
805
806 public ModuleSymbol enterModule(Name name) {
807 ModuleSymbol msym = modules.get(name);
808 if (msym == null) {
809 msym = ModuleSymbol.create(name, names.module_info);
810 addRootPackageFor(msym);
811 msym.completer = s -> moduleCompleter.complete(s); //bootstrap issues
812 modules.put(name, msym);
813 }
814 return msym;
815 }
816
817 public ModuleSymbol getModule(Name name) {
818 return modules.get(name);
819 }
820
821 //temporary:
822 public ModuleSymbol inferModule(Name packageName) {
823 if (packageName.isEmpty())
824 return java_base == noModule ? noModule : unnamedModule;//!
825
826 ModuleSymbol msym = null;
827 Map<ModuleSymbol,PackageSymbol> map = packages.get(packageName);
828 if (map == null)
829 return null;
830 for (Map.Entry<ModuleSymbol,PackageSymbol> e: map.entrySet()) {
831 if (!e.getValue().members().isEmpty()) {
832 if (msym == null) {
833 msym = e.getKey();
834 } else {
835 return null;
836 }
837 }
838 }
839 return msym;
840 }
841
842 public List<ModuleSymbol> listPackageModules(Name packageName) {
843 if (packageName.isEmpty())
844 return List.nil();
845
846 List<ModuleSymbol> result = List.nil();
847 Map<ModuleSymbol,PackageSymbol> map = packages.get(packageName);
848 if (map != null) {
849 for (Map.Entry<ModuleSymbol, PackageSymbol> e: map.entrySet()) {
850 if (!e.getValue().members().isEmpty()) {
851 result = result.prepend(e.getKey());
852 }
853 }
854 }
855 return result;
856 }
857
858 public Collection<ModuleSymbol> getAllModules() {
859 return modules.values();
860 }
861
862 public Iterable<ClassSymbol> getClassesForName(Name candidate) {
863 return classes.getOrDefault(candidate, Collections.emptyMap()).values();
864 }
865
866 public Iterable<PackageSymbol> getPackagesForName(Name candidate) {
867 return packages.getOrDefault(candidate, Collections.emptyMap()).values();
868 }
869 }