1 /*
2 * Copyright (c) 1999, 2021, 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 previewFeatureInternalType;
221 public final Type typeDescriptorType;
222 public final Type recordType;
223 public final Type switchBootstrapsType;
224 public final Type valueBasedType;
225 public final Type valueBasedInternalType;
226
227 /** The symbol representing the length field of an array.
228 */
229 public final VarSymbol lengthVar;
230
231 /** The symbol representing the final finalize method on enums */
232 public final MethodSymbol enumFinalFinalize;
233
234 /** The symbol representing the close method on TWR AutoCloseable type */
235 public final MethodSymbol autoCloseableClose;
236
237 /** The predefined type that belongs to a tag.
238 */
239 public final Type[] typeOfTag = new Type[TypeTag.getTypeTagCount()];
240
241 /** The name of the class that belongs to a basic type tag.
242 */
243 public final Name[] boxedName = new Name[TypeTag.getTypeTagCount()];
244
245 /** A hashtable containing the encountered top-level and member classes,
246 * indexed by flat names. The table does not contain local classes.
247 * It should be updated from the outside to reflect classes defined
248 * by compiled source files.
249 */
250 private final Map<Name, Map<ModuleSymbol,ClassSymbol>> classes = new HashMap<>();
251
252 /** A hashtable containing the encountered packages.
253 * the table should be updated from outside to reflect packages defined
254 * by compiled source files.
255 */
256 private final Map<Name, Map<ModuleSymbol,PackageSymbol>> packages = new HashMap<>();
257
258 /** A hashtable giving the encountered modules.
259 */
260 private final Map<Name, ModuleSymbol> modules = new LinkedHashMap<>();
261
262 private final Map<Types.UniqueType, VarSymbol> classFields = new HashMap<>();
263
264 public VarSymbol getClassField(Type type, Types types) {
265 return classFields.computeIfAbsent(
266 new UniqueType(type, types), k -> {
267 Type arg = null;
268 if (type.getTag() == ARRAY || type.getTag() == CLASS)
269 arg = types.erasure(type);
270 else if (type.isPrimitiveOrVoid())
271 arg = types.boxedClass(type).type;
272 else
273 throw new AssertionError(type);
274
275 Type t = new ClassType(
276 classType.getEnclosingType(), List.of(arg), classType.tsym);
277 return new VarSymbol(
278 STATIC | PUBLIC | FINAL, names._class, t, type.tsym);
279 });
280 }
281
282 public void initType(Type type, ClassSymbol c) {
283 type.tsym = c;
284 typeOfTag[type.getTag().ordinal()] = type;
285 }
286
287 public void initType(Type type, String name) {
288 initType(
289 type,
290 new ClassSymbol(
291 PUBLIC, names.fromString(name), type, rootPackage));
292 }
293
294 public void initType(Type type, String name, String bname) {
295 initType(type, name);
296 boxedName[type.getTag().ordinal()] = names.fromString("java.lang." + bname);
297 }
298
299 /** The class symbol that owns all predefined symbols.
300 */
301 public final ClassSymbol predefClass;
302
303 /** Enter a class into symbol table.
304 * @param s The name of the class.
305 */
306 private Type enterClass(String s) {
307 return enterClass(java_base, names.fromString(s)).type;
308 }
309
310 public void synthesizeEmptyInterfaceIfMissing(final Type type) {
311 final Completer completer = type.tsym.completer;
312 type.tsym.completer = new Completer() {
313 @Override
314 public void complete(Symbol sym) throws CompletionFailure {
315 try {
316 completer.complete(sym);
317 } catch (CompletionFailure e) {
318 sym.flags_field |= (PUBLIC | INTERFACE);
319 ((ClassType) sym.type).supertype_field = objectType;
320 }
321 }
322
323 @Override
324 public boolean isTerminal() {
325 return completer.isTerminal();
326 }
327 };
328 }
329
330 public void synthesizeBoxTypeIfMissing(final Type type) {
331 ClassSymbol sym = enterClass(java_base, boxedName[type.getTag().ordinal()]);
332 final Completer completer = sym.completer;
333 sym.completer = new Completer() {
334 @Override
335 public void complete(Symbol sym) throws CompletionFailure {
336 try {
337 completer.complete(sym);
338 } catch (CompletionFailure e) {
339 sym.flags_field |= PUBLIC;
340 ((ClassType) sym.type).supertype_field = objectType;
341 MethodSymbol boxMethod =
342 new MethodSymbol(PUBLIC | STATIC, names.valueOf,
343 new MethodType(List.of(type), sym.type,
344 List.nil(), methodClass),
345 sym);
346 sym.members().enter(boxMethod);
347 MethodSymbol unboxMethod =
348 new MethodSymbol(PUBLIC,
349 type.tsym.name.append(names.Value), // x.intValue()
350 new MethodType(List.nil(), type,
351 List.nil(), methodClass),
352 sym);
353 sym.members().enter(unboxMethod);
354 }
355 }
356
357 @Override
358 public boolean isTerminal() {
359 return completer.isTerminal();
360 }
361 };
362 }
363
364 // Enter a synthetic class that is used to mark classes in ct.sym.
365 // This class does not have a class file.
366 private Type enterSyntheticAnnotation(String name) {
367 // for now, leave the module null, to prevent problems from synthesizing the
368 // existence of a class in any specific module, including noModule
369 ClassType type = (ClassType)enterClass(java_base, names.fromString(name)).type;
370 ClassSymbol sym = (ClassSymbol)type.tsym;
371 sym.completer = Completer.NULL_COMPLETER;
372 sym.flags_field = PUBLIC|ACYCLIC|ANNOTATION|INTERFACE;
373 sym.erasure_field = type;
374 sym.members_field = WriteableScope.create(sym);
375 type.typarams_field = List.nil();
376 type.allparams_field = List.nil();
377 type.supertype_field = annotationType;
378 type.interfaces_field = List.nil();
379 return type;
380 }
381
382 /** Constructor; enters all predefined identifiers and operators
383 * into symbol table.
384 */
385 protected Symtab(Context context) throws CompletionFailure {
386 context.put(symtabKey, this);
387
388 names = Names.instance(context);
389
390 // Create the unknown type
391 unknownType = new UnknownType();
392
393 messages = JavacMessages.instance(context);
394
395 MissingInfoHandler missingInfoHandler = MissingInfoHandler.instance(context);
396
397 Target target = Target.instance(context);
398 rootPackage = new RootPackageSymbol(names.empty, null,
399 missingInfoHandler,
400 target.runtimeUseNestAccess());
401
402 // create the basic builtin symbols
403 unnamedModule = new ModuleSymbol(names.empty, null) {
404 {
405 directives = List.nil();
406 exports = List.nil();
407 provides = List.nil();
408 uses = List.nil();
409 ModuleSymbol java_base = enterModule(names.java_base);
410 com.sun.tools.javac.code.Directive.RequiresDirective d =
411 new com.sun.tools.javac.code.Directive.RequiresDirective(java_base,
412 EnumSet.of(com.sun.tools.javac.code.Directive.RequiresFlag.MANDATED));
413 requires = List.of(d);
414 }
415 @Override
416 public String toString() {
417 return messages.getLocalizedString("compiler.misc.unnamed.module");
418 }
419 };
420 addRootPackageFor(unnamedModule);
421 unnamedModule.enclosedPackages = unnamedModule.enclosedPackages.prepend(unnamedModule.unnamedPackage);
422
423 errModule = new ModuleSymbol(names.empty, null) {
424 {
425 directives = List.nil();
426 exports = List.nil();
427 provides = List.nil();
428 uses = List.nil();
429 ModuleSymbol java_base = enterModule(names.java_base);
430 com.sun.tools.javac.code.Directive.RequiresDirective d =
431 new com.sun.tools.javac.code.Directive.RequiresDirective(java_base,
432 EnumSet.of(com.sun.tools.javac.code.Directive.RequiresFlag.MANDATED));
433 requires = List.of(d);
434 }
435 };
436 addRootPackageFor(errModule);
437
438 noModule = new ModuleSymbol(names.empty, null) {
439 @Override public boolean isNoModule() {
440 return true;
441 }
442 };
443 addRootPackageFor(noModule);
444
445 noSymbol = new TypeSymbol(NIL, 0, names.empty, Type.noType, rootPackage) {
446 @Override @DefinedBy(Api.LANGUAGE_MODEL)
447 public <R, P> R accept(ElementVisitor<R, P> v, P p) {
448 return v.visitUnknown(this, p);
449 }
450 };
451
452 // create the error symbols
453 errSymbol = new ClassSymbol(PUBLIC|STATIC|ACYCLIC, names.any, null, rootPackage);
454 errType = new ErrorType(errSymbol, Type.noType);
455
456 unknownSymbol = new ClassSymbol(PUBLIC|STATIC|ACYCLIC, names.fromString("<any?>"), null, rootPackage);
457 unknownSymbol.members_field = new Scope.ErrorScope(unknownSymbol);
458 unknownSymbol.type = unknownType;
459
460 // initialize builtin types
461 initType(byteType, "byte", "Byte");
462 initType(shortType, "short", "Short");
463 initType(charType, "char", "Character");
464 initType(intType, "int", "Integer");
465 initType(longType, "long", "Long");
466 initType(floatType, "float", "Float");
467 initType(doubleType, "double", "Double");
468 initType(booleanType, "boolean", "Boolean");
469 initType(voidType, "void", "Void");
470 initType(botType, "<nulltype>");
471 initType(errType, errSymbol);
472 initType(unknownType, unknownSymbol);
473
474 // the builtin class of all arrays
475 arrayClass = new ClassSymbol(PUBLIC|ACYCLIC, names.Array, noSymbol);
476
477 // VGJ
478 boundClass = new ClassSymbol(PUBLIC|ACYCLIC, names.Bound, noSymbol);
479 boundClass.members_field = new Scope.ErrorScope(boundClass);
480
481 // the builtin class of all methods
482 methodClass = new ClassSymbol(PUBLIC|ACYCLIC, names.Method, noSymbol);
483 methodClass.members_field = new Scope.ErrorScope(boundClass);
484
485 // Create class to hold all predefined constants and operations.
486 predefClass = new ClassSymbol(PUBLIC|ACYCLIC, names.empty, rootPackage);
487 WriteableScope scope = WriteableScope.create(predefClass);
488 predefClass.members_field = scope;
489
490 // Get the initial completer for Symbols from the ClassFinder
491 initialCompleter = ClassFinder.instance(context).getCompleter();
492 rootPackage.members_field = WriteableScope.create(rootPackage);
493
494 // Enter symbols for basic types.
495 scope.enter(byteType.tsym);
496 scope.enter(shortType.tsym);
497 scope.enter(charType.tsym);
498 scope.enter(intType.tsym);
499 scope.enter(longType.tsym);
500 scope.enter(floatType.tsym);
501 scope.enter(doubleType.tsym);
502 scope.enter(booleanType.tsym);
503 scope.enter(errType.tsym);
504
505 // Enter symbol for the errSymbol
506 scope.enter(errSymbol);
507
508 Source source = Source.instance(context);
509 if (Feature.MODULES.allowedInSource(source)) {
510 java_base = enterModule(names.java_base);
511 //avoid completing java.base during the Symtab initialization
512 java_base.completer = Completer.NULL_COMPLETER;
513 java_base.visiblePackages = Collections.emptyMap();
514 } else {
515 java_base = noModule;
516 }
517
518 // Get the initial completer for ModuleSymbols from Modules
519 moduleCompleter = Modules.instance(context).getCompleter();
520
521 // Enter predefined classes. All are assumed to be in the java.base module.
522 objectType = enterClass("java.lang.Object");
523 objectMethodsType = enterClass("java.lang.runtime.ObjectMethods");
524 objectsType = enterClass("java.util.Objects");
525 classType = enterClass("java.lang.Class");
526 stringType = enterClass("java.lang.String");
527 stringBufferType = enterClass("java.lang.StringBuffer");
528 stringBuilderType = enterClass("java.lang.StringBuilder");
529 cloneableType = enterClass("java.lang.Cloneable");
530 throwableType = enterClass("java.lang.Throwable");
531 serializableType = enterClass("java.io.Serializable");
532 serializedLambdaType = enterClass("java.lang.invoke.SerializedLambda");
533 varHandleType = enterClass("java.lang.invoke.VarHandle");
534 methodHandleType = enterClass("java.lang.invoke.MethodHandle");
535 methodHandleLookupType = enterClass("java.lang.invoke.MethodHandles$Lookup");
536 methodTypeType = enterClass("java.lang.invoke.MethodType");
537 errorType = enterClass("java.lang.Error");
538 illegalArgumentExceptionType = enterClass("java.lang.IllegalArgumentException");
539 interruptedExceptionType = enterClass("java.lang.InterruptedException");
540 exceptionType = enterClass("java.lang.Exception");
541 runtimeExceptionType = enterClass("java.lang.RuntimeException");
542 classNotFoundExceptionType = enterClass("java.lang.ClassNotFoundException");
543 noClassDefFoundErrorType = enterClass("java.lang.NoClassDefFoundError");
544 noSuchFieldErrorType = enterClass("java.lang.NoSuchFieldError");
545 assertionErrorType = enterClass("java.lang.AssertionError");
546 incompatibleClassChangeErrorType = enterClass("java.lang.IncompatibleClassChangeError");
547 cloneNotSupportedExceptionType = enterClass("java.lang.CloneNotSupportedException");
548 annotationType = enterClass("java.lang.annotation.Annotation");
549 classLoaderType = enterClass("java.lang.ClassLoader");
550 enumSym = enterClass(java_base, names.java_lang_Enum);
551 enumFinalFinalize =
552 new MethodSymbol(PROTECTED|FINAL|HYPOTHETICAL,
553 names.finalize,
554 new MethodType(List.nil(), voidType,
555 List.nil(), methodClass),
556 enumSym);
557 listType = enterClass("java.util.List");
558 collectionsType = enterClass("java.util.Collections");
559 comparableType = enterClass("java.lang.Comparable");
560 comparatorType = enterClass("java.util.Comparator");
561 arraysType = enterClass("java.util.Arrays");
562 iterableType = enterClass("java.lang.Iterable");
563 iteratorType = enterClass("java.util.Iterator");
564 annotationTargetType = enterClass("java.lang.annotation.Target");
565 overrideType = enterClass("java.lang.Override");
566 retentionType = enterClass("java.lang.annotation.Retention");
567 deprecatedType = enterClass("java.lang.Deprecated");
568 suppressWarningsType = enterClass("java.lang.SuppressWarnings");
569 supplierType = enterClass("java.util.function.Supplier");
570 inheritedType = enterClass("java.lang.annotation.Inherited");
571 repeatableType = enterClass("java.lang.annotation.Repeatable");
572 documentedType = enterClass("java.lang.annotation.Documented");
573 elementTypeType = enterClass("java.lang.annotation.ElementType");
574 systemType = enterClass("java.lang.System");
575 autoCloseableType = enterClass("java.lang.AutoCloseable");
576 autoCloseableClose = new MethodSymbol(PUBLIC,
577 names.close,
578 new MethodType(List.nil(), voidType,
579 List.of(exceptionType), methodClass),
580 autoCloseableType.tsym);
581 trustMeType = enterClass("java.lang.SafeVarargs");
582 nativeHeaderType = enterClass("java.lang.annotation.Native");
583 lambdaMetafactory = enterClass("java.lang.invoke.LambdaMetafactory");
584 stringConcatFactory = enterClass("java.lang.invoke.StringConcatFactory");
585 functionalInterfaceType = enterClass("java.lang.FunctionalInterface");
586 previewFeatureType = enterClass("jdk.internal.javac.PreviewFeature");
587 previewFeatureInternalType = enterSyntheticAnnotation("jdk.internal.PreviewFeature+Annotation");
588 typeDescriptorType = enterClass("java.lang.invoke.TypeDescriptor");
589 recordType = enterClass("java.lang.Record");
590 switchBootstrapsType = enterClass("java.lang.runtime.SwitchBootstraps");
591 valueBasedType = enterClass("jdk.internal.ValueBased");
592 valueBasedInternalType = enterSyntheticAnnotation("jdk.internal.ValueBased+Annotation");
593
594 synthesizeEmptyInterfaceIfMissing(autoCloseableType);
595 synthesizeEmptyInterfaceIfMissing(cloneableType);
596 synthesizeEmptyInterfaceIfMissing(serializableType);
597 synthesizeEmptyInterfaceIfMissing(lambdaMetafactory);
598 synthesizeEmptyInterfaceIfMissing(serializedLambdaType);
599 synthesizeEmptyInterfaceIfMissing(stringConcatFactory);
600 synthesizeBoxTypeIfMissing(doubleType);
601 synthesizeBoxTypeIfMissing(floatType);
602 synthesizeBoxTypeIfMissing(voidType);
603
604 // Enter a synthetic class that is used to mark internal
605 // proprietary classes in ct.sym. This class does not have a
606 // class file.
607 proprietaryType = enterSyntheticAnnotation("sun.Proprietary+Annotation");
608
609 // Enter a synthetic class that is used to provide profile info for
610 // classes in ct.sym. This class does not have a class file.
611 profileType = enterSyntheticAnnotation("jdk.Profile+Annotation");
612 MethodSymbol m = new MethodSymbol(PUBLIC | ABSTRACT, names.value, intType, profileType.tsym);
613 profileType.tsym.members().enter(m);
614
615 // Enter a class for arrays.
616 // The class implements java.lang.Cloneable and java.io.Serializable.
617 // It has a final length field and a clone method.
618 ClassType arrayClassType = (ClassType)arrayClass.type;
619 arrayClassType.supertype_field = objectType;
620 arrayClassType.interfaces_field = List.of(cloneableType, serializableType);
621 arrayClass.members_field = WriteableScope.create(arrayClass);
622 lengthVar = new VarSymbol(
623 PUBLIC | FINAL,
624 names.length,
625 intType,
626 arrayClass);
627 arrayClass.members().enter(lengthVar);
628 arrayCloneMethod = new MethodSymbol(
629 PUBLIC,
630 names.clone,
631 new MethodType(List.nil(), objectType,
632 List.nil(), methodClass),
633 arrayClass);
634 arrayClass.members().enter(arrayCloneMethod);
635
636 if (java_base != noModule)
637 java_base.completer = moduleCompleter::complete; //bootstrap issues
638
639 }
640
641 /** Define a new class given its name and owner.
642 */
643 public ClassSymbol defineClass(Name name, Symbol owner) {
644 ClassSymbol c = new ClassSymbol(0, name, owner);
645 c.completer = initialCompleter;
646 return c;
647 }
648
649 /** Create a new toplevel or member class symbol with given name
650 * and owner and enter in `classes' unless already there.
651 */
652 public ClassSymbol enterClass(ModuleSymbol msym, Name name, TypeSymbol owner) {
653 Assert.checkNonNull(msym);
654 Name flatname = TypeSymbol.formFlatName(name, owner);
655 ClassSymbol c = getClass(msym, flatname);
656 if (c == null) {
657 c = defineClass(name, owner);
658 doEnterClass(msym, c);
659 } else if ((c.name != name || c.owner != owner) && owner.kind == TYP && c.owner.kind == PCK) {
660 // reassign fields of classes that might have been loaded with
661 // their flat names.
662 c.owner.members().remove(c);
663 c.name = name;
664 c.owner = owner;
665 c.fullname = ClassSymbol.formFullName(name, owner);
666 }
667 return c;
668 }
669
670 public ClassSymbol getClass(ModuleSymbol msym, Name flatName) {
671 Assert.checkNonNull(msym, flatName::toString);
672 return classes.getOrDefault(flatName, Collections.emptyMap()).get(msym);
673 }
674
675 public PackageSymbol lookupPackage(ModuleSymbol msym, Name flatName) {
676 return lookupPackage(msym, flatName, false);
677 }
678
679 private PackageSymbol lookupPackage(ModuleSymbol msym, Name flatName, boolean onlyExisting) {
680 Assert.checkNonNull(msym);
681
682 if (flatName.isEmpty()) {
683 //unnamed packages only from the current module - visiblePackages contains *root* package, not unnamed package!
684 return msym.unnamedPackage;
685 }
686
687 if (msym == noModule) {
688 return enterPackage(msym, flatName);
689 }
690
691 msym.complete();
692
693 PackageSymbol pack;
694
695 pack = msym.visiblePackages.get(flatName);
696
697 if (pack != null)
698 return pack;
699
700 pack = getPackage(msym, flatName);
701
702 if ((pack != null && pack.exists()) || onlyExisting)
703 return pack;
704
705 boolean dependsOnUnnamed = msym.requires != null &&
706 msym.requires.stream()
707 .map(rd -> rd.module)
708 .anyMatch(mod -> mod == unnamedModule);
709
710 if (dependsOnUnnamed) {
711 //msyms depends on the unnamed module, for which we generally don't know
712 //the list of packages it "exports" ahead of time. So try to lookup the package in the
713 //current module, and in the unnamed module and see if it exists in one of them
714 PackageSymbol unnamedPack = getPackage(unnamedModule, flatName);
715
716 if (unnamedPack != null && unnamedPack.exists()) {
717 msym.visiblePackages.put(unnamedPack.fullname, unnamedPack);
718 return unnamedPack;
719 }
720
721 pack = enterPackage(msym, flatName);
722 pack.complete();
723 if (pack.exists())
724 return pack;
725
726 unnamedPack = enterPackage(unnamedModule, flatName);
727 unnamedPack.complete();
728 if (unnamedPack.exists()) {
729 msym.visiblePackages.put(unnamedPack.fullname, unnamedPack);
730 return unnamedPack;
731 }
732
733 return pack;
734 }
735
736 return enterPackage(msym, flatName);
737 }
738
739 private static final Map<ModuleSymbol, ClassSymbol> EMPTY = new HashMap<>();
740
741 public void removeClass(ModuleSymbol msym, Name flatName) {
742 classes.getOrDefault(flatName, EMPTY).remove(msym);
743 }
744
745 public Iterable<ClassSymbol> getAllClasses() {
746 return () -> Iterators.createCompoundIterator(classes.values(), v -> v.values().iterator());
747 }
748
749 private void doEnterClass(ModuleSymbol msym, ClassSymbol cs) {
750 classes.computeIfAbsent(cs.flatname, n -> new HashMap<>()).put(msym, cs);
751 }
752
753 /** Create a new member or toplevel class symbol with given flat name
754 * and enter in `classes' unless already there.
755 */
756 public ClassSymbol enterClass(ModuleSymbol msym, Name flatname) {
757 Assert.checkNonNull(msym);
758 PackageSymbol ps = lookupPackage(msym, Convert.packagePart(flatname));
759 Assert.checkNonNull(ps);
760 Assert.checkNonNull(ps.modle);
761 ClassSymbol c = getClass(ps.modle, flatname);
762 if (c == null) {
763 c = defineClass(Convert.shortName(flatname), ps);
764 doEnterClass(ps.modle, c);
765 return c;
766 } else
767 return c;
768 }
769
770 /** Check to see if a package exists, given its fully qualified name.
771 */
772 public boolean packageExists(ModuleSymbol msym, Name fullname) {
773 Assert.checkNonNull(msym);
774 PackageSymbol pack = lookupPackage(msym, fullname, true);
775 return pack != null && pack.exists();
776 }
777
778 /** Make a package, given its fully qualified name.
779 */
780 public PackageSymbol enterPackage(ModuleSymbol currModule, Name fullname) {
781 Assert.checkNonNull(currModule);
782 PackageSymbol p = getPackage(currModule, fullname);
783 if (p == null) {
784 Assert.check(!fullname.isEmpty(), () -> "rootPackage missing!; currModule: " + currModule);
785 p = new PackageSymbol(
786 Convert.shortName(fullname),
787 enterPackage(currModule, Convert.packagePart(fullname)));
788 p.completer = initialCompleter;
789 p.modle = currModule;
790 doEnterPackage(currModule, p);
791 }
792 return p;
793 }
794
795 private void doEnterPackage(ModuleSymbol msym, PackageSymbol pack) {
796 packages.computeIfAbsent(pack.fullname, n -> new HashMap<>()).put(msym, pack);
797 msym.enclosedPackages = msym.enclosedPackages.prepend(pack);
798 }
799
800 private void addRootPackageFor(ModuleSymbol module) {
801 doEnterPackage(module, rootPackage);
802 PackageSymbol unnamedPackage = new PackageSymbol(names.empty, rootPackage) {
803 @Override
804 public String toString() {
805 return messages.getLocalizedString("compiler.misc.unnamed.package");
806 }
807 };
808 unnamedPackage.modle = module;
809 //we cannot use a method reference below, as initialCompleter might be null now
810 unnamedPackage.completer = s -> initialCompleter.complete(s);
811 unnamedPackage.flags_field |= EXISTS;
812 module.unnamedPackage = unnamedPackage;
813 }
814
815 public PackageSymbol getPackage(ModuleSymbol module, Name fullname) {
816 return packages.getOrDefault(fullname, Collections.emptyMap()).get(module);
817 }
818
819 public ModuleSymbol enterModule(Name name) {
820 ModuleSymbol msym = modules.get(name);
821 if (msym == null) {
822 msym = ModuleSymbol.create(name, names.module_info);
823 addRootPackageFor(msym);
824 msym.completer = s -> moduleCompleter.complete(s); //bootstrap issues
825 modules.put(name, msym);
826 }
827 return msym;
828 }
829
830 public ModuleSymbol getModule(Name name) {
831 return modules.get(name);
832 }
833
834 //temporary:
835 public ModuleSymbol inferModule(Name packageName) {
836 if (packageName.isEmpty())
837 return java_base == noModule ? noModule : unnamedModule;//!
838
839 ModuleSymbol msym = null;
840 Map<ModuleSymbol,PackageSymbol> map = packages.get(packageName);
841 if (map == null)
842 return null;
843 for (Map.Entry<ModuleSymbol,PackageSymbol> e: map.entrySet()) {
844 if (!e.getValue().members().isEmpty()) {
845 if (msym == null) {
846 msym = e.getKey();
847 } else {
848 return null;
849 }
850 }
851 }
852 return msym;
853 }
854
855 public List<ModuleSymbol> listPackageModules(Name packageName) {
856 if (packageName.isEmpty())
857 return List.nil();
858
859 List<ModuleSymbol> result = List.nil();
860 Map<ModuleSymbol,PackageSymbol> map = packages.get(packageName);
861 if (map != null) {
862 for (Map.Entry<ModuleSymbol, PackageSymbol> e: map.entrySet()) {
863 if (!e.getValue().members().isEmpty()) {
864 result = result.prepend(e.getKey());
865 }
866 }
867 }
868 return result;
869 }
870
871 public Collection<ModuleSymbol> getAllModules() {
872 return modules.values();
873 }
874
875 public Iterable<ClassSymbol> getClassesForName(Name candidate) {
876 return classes.getOrDefault(candidate, Collections.emptyMap()).values();
877 }
878
879 public Iterable<PackageSymbol> getPackagesForName(Name candidate) {
880 return packages.getOrDefault(candidate, Collections.emptyMap()).values();
881 }
882 }