1 /*
2 * Copyright (c) 1999, 2016, 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.HashMap;
31 import java.util.LinkedHashMap;
32 import java.util.Map;
33
34 import javax.lang.model.element.ElementVisitor;
35
36 import com.sun.tools.javac.code.Scope.WriteableScope;
37 import com.sun.tools.javac.code.Symbol.ClassSymbol;
38 import com.sun.tools.javac.code.Symbol.Completer;
39 import com.sun.tools.javac.code.Symbol.CompletionFailure;
40 import com.sun.tools.javac.code.Symbol.MethodSymbol;
41 import com.sun.tools.javac.code.Symbol.ModuleSymbol;
42 import com.sun.tools.javac.code.Symbol.PackageSymbol;
43 import com.sun.tools.javac.code.Symbol.TypeSymbol;
44 import com.sun.tools.javac.code.Symbol.VarSymbol;
45 import com.sun.tools.javac.code.Type.BottomType;
46 import com.sun.tools.javac.code.Type.ClassType;
47 import com.sun.tools.javac.code.Type.ErrorType;
48 import com.sun.tools.javac.code.Type.JCPrimitiveType;
49 import com.sun.tools.javac.code.Type.JCVoidType;
50 import com.sun.tools.javac.code.Type.MethodType;
51 import com.sun.tools.javac.code.Type.UnknownType;
52 import com.sun.tools.javac.comp.Modules;
53 import com.sun.tools.javac.util.Assert;
54 import com.sun.tools.javac.util.Context;
55 import com.sun.tools.javac.util.Convert;
56 import com.sun.tools.javac.util.DefinedBy;
57 import com.sun.tools.javac.util.DefinedBy.Api;
58 import com.sun.tools.javac.util.Iterators;
59 import com.sun.tools.javac.util.JavacMessages;
60 import com.sun.tools.javac.util.List;
61 import com.sun.tools.javac.util.Name;
62 import com.sun.tools.javac.util.Names;
63 import com.sun.tools.javac.util.Options;
64
65 import static com.sun.tools.javac.code.Flags.*;
66 import static com.sun.tools.javac.code.Kinds.Kind.*;
67 import static com.sun.tools.javac.code.TypeTag.*;
68
69 /** A class that defines all predefined constants and operators
70 * as well as special classes such as java.lang.Object, which need
71 * to be known to the compiler. All symbols are held in instance
72 * fields. This makes it possible to work in multiple concurrent
73 * projects, which might use different class files for library classes.
74 *
75 * <p><b>This is NOT part of any supported API.
76 * If you write code that depends on this, you do so at your own risk.
77 * This code and its internal interfaces are subject to change or
78 * deletion without notice.</b>
79 */
80 public class Symtab {
81 /** The context key for the symbol table. */
82 protected static final Context.Key<Symtab> symtabKey = new Context.Key<>();
83
84 /** Get the symbol table instance. */
85 public static Symtab instance(Context context) {
86 Symtab instance = context.get(symtabKey);
87 if (instance == null)
88 instance = new Symtab(context);
89 return instance;
90 }
91
92 /** Builtin types.
93 */
94 public final JCPrimitiveType byteType = new JCPrimitiveType(BYTE, null);
95 public final JCPrimitiveType charType = new JCPrimitiveType(CHAR, null);
96 public final JCPrimitiveType shortType = new JCPrimitiveType(SHORT, null);
97 public final JCPrimitiveType intType = new JCPrimitiveType(INT, null);
98 public final JCPrimitiveType longType = new JCPrimitiveType(LONG, null);
99 public final JCPrimitiveType floatType = new JCPrimitiveType(FLOAT, null);
100 public final JCPrimitiveType doubleType = new JCPrimitiveType(DOUBLE, null);
101 public final JCPrimitiveType booleanType = new JCPrimitiveType(BOOLEAN, null);
102 public final Type botType = new BottomType();
103 public final JCVoidType voidType = new JCVoidType();
104
105 private final Names names;
106 private final JavacMessages messages;
107 private final Completer initialCompleter;
108 private final Completer moduleCompleter;
109
110 /** A symbol for the unnamed module.
111 */
112 public final ModuleSymbol unnamedModule;
113
114 /** The error module.
115 */
116 public final ModuleSymbol errModule;
117
118 /** A symbol for no module, for use with -source 8 or less
119 */
120 public final ModuleSymbol noModule;
121
122 /** A symbol for the root package.
123 */
124 public final PackageSymbol rootPackage;
125
126 /** A symbol that stands for a missing symbol.
127 */
128 public final TypeSymbol noSymbol;
129
130 /** The error symbol.
131 */
132 public final ClassSymbol errSymbol;
133
134 /** The unknown symbol.
135 */
136 public final ClassSymbol unknownSymbol;
137
138 /** A value for the errType, with a originalType of noType */
139 public final Type errType;
140
141 /** A value for the unknown type. */
142 public final Type unknownType;
143
144 /** The builtin type of all arrays. */
145 public final ClassSymbol arrayClass;
146 public final MethodSymbol arrayCloneMethod;
147
148 /** VGJ: The (singleton) type of all bound types. */
149 public final ClassSymbol boundClass;
150
151 /** The builtin type of all methods. */
152 public final ClassSymbol methodClass;
153
154 /** A symbol for the java.base module.
155 */
156 public final ModuleSymbol java_base;
157
158 /** Predefined types.
159 */
160 public final Type objectType;
161 public final Type objectsType;
162 public final Type classType;
163 public final Type classLoaderType;
164 public final Type stringType;
165 public final Type stringBufferType;
166 public final Type stringBuilderType;
167 public final Type cloneableType;
168 public final Type serializableType;
169 public final Type serializedLambdaType;
170 public final Type varHandleType;
171 public final Type methodHandleType;
172 public final Type methodHandleLookupType;
173 public final Type methodTypeType;
174 public final Type nativeHeaderType;
175 public final Type throwableType;
176 public final Type errorType;
177 public final Type interruptedExceptionType;
178 public final Type illegalArgumentExceptionType;
179 public final Type exceptionType;
180 public final Type runtimeExceptionType;
181 public final Type classNotFoundExceptionType;
182 public final Type noClassDefFoundErrorType;
183 public final Type noSuchFieldErrorType;
184 public final Type assertionErrorType;
185 public final Type cloneNotSupportedExceptionType;
186 public final Type annotationType;
187 public final TypeSymbol enumSym;
188 public final Type listType;
189 public final Type collectionsType;
190 public final Type comparableType;
191 public final Type comparatorType;
192 public final Type arraysType;
193 public final Type iterableType;
194 public final Type iteratorType;
195 public final Type annotationTargetType;
196 public final Type overrideType;
197 public final Type retentionType;
198 public final Type deprecatedType;
199 public final Type suppressWarningsType;
200 public final Type supplierType;
201 public final Type inheritedType;
202 public final Type profileType;
203 public final Type proprietaryType;
204 public final Type systemType;
205 public final Type autoCloseableType;
206 public final Type trustMeType;
207 public final Type lambdaMetafactory;
208 public final Type stringConcatFactory;
209 public final Type repeatableType;
210 public final Type documentedType;
211 public final Type elementTypeType;
212 public final Type functionalInterfaceType;
213
214 /** The symbol representing the length field of an array.
215 */
216 public final VarSymbol lengthVar;
217
218 /** The symbol representing the final finalize method on enums */
219 public final MethodSymbol enumFinalFinalize;
220
221 /** The symbol representing the close method on TWR AutoCloseable type */
222 public final MethodSymbol autoCloseableClose;
223
224 /** The predefined type that belongs to a tag.
225 */
226 public final Type[] typeOfTag = new Type[TypeTag.getTypeTagCount()];
227
228 /** The name of the class that belongs to a basic type tag.
229 */
230 public final Name[] boxedName = new Name[TypeTag.getTypeTagCount()];
231
232 /** A hashtable containing the encountered top-level and member classes,
233 * indexed by flat names. The table does not contain local classes.
234 * It should be updated from the outside to reflect classes defined
235 * by compiled source files.
236 */
237 private final Map<Name, Map<ModuleSymbol,ClassSymbol>> classes = new HashMap<>();
238
239 /** A hashtable containing the encountered packages.
240 * the table should be updated from outside to reflect packages defined
241 * by compiled source files.
242 */
243 private final Map<Name, Map<ModuleSymbol,PackageSymbol>> packages = new HashMap<>();
244
245 /** A hashtable giving the encountered modules.
246 */
247 private final Map<Name, ModuleSymbol> modules = new LinkedHashMap<>();
248
249 public void initType(Type type, ClassSymbol c) {
250 type.tsym = c;
251 typeOfTag[type.getTag().ordinal()] = type;
252 }
253
254 public void initType(Type type, String name) {
255 initType(
256 type,
257 new ClassSymbol(
258 PUBLIC, names.fromString(name), type, rootPackage));
259 }
260
261 public void initType(Type type, String name, String bname) {
262 initType(type, name);
263 boxedName[type.getTag().ordinal()] = names.fromString("java.lang." + bname);
264 }
265
266 /** The class symbol that owns all predefined symbols.
267 */
268 public final ClassSymbol predefClass;
269
270 /** Enter a class into symbol table.
271 * @param s The name of the class.
272 */
273 private Type enterClass(String s) {
274 return enterClass(java_base, names.fromString(s)).type;
275 }
276
277 public void synthesizeEmptyInterfaceIfMissing(final Type type) {
278 final Completer completer = type.tsym.completer;
279 type.tsym.completer = new Completer() {
280 @Override
281 public void complete(Symbol sym) throws CompletionFailure {
282 try {
283 completer.complete(sym);
284 } catch (CompletionFailure e) {
285 sym.flags_field |= (PUBLIC | INTERFACE);
286 ((ClassType) sym.type).supertype_field = objectType;
287 }
288 }
289
290 @Override
291 public boolean isTerminal() {
292 return completer.isTerminal();
293 }
294 };
295 }
296
297 public void synthesizeBoxTypeIfMissing(final Type type) {
298 ClassSymbol sym = enterClass(java_base, boxedName[type.getTag().ordinal()]);
299 final Completer completer = sym.completer;
300 sym.completer = new Completer() {
301 @Override
302 public void complete(Symbol sym) throws CompletionFailure {
303 try {
304 completer.complete(sym);
305 } catch (CompletionFailure e) {
306 sym.flags_field |= PUBLIC;
307 ((ClassType) sym.type).supertype_field = objectType;
308 MethodSymbol boxMethod =
309 new MethodSymbol(PUBLIC | STATIC, names.valueOf,
310 new MethodType(List.of(type), sym.type,
311 List.<Type>nil(), methodClass),
312 sym);
313 sym.members().enter(boxMethod);
314 MethodSymbol unboxMethod =
315 new MethodSymbol(PUBLIC,
316 type.tsym.name.append(names.Value), // x.intValue()
317 new MethodType(List.<Type>nil(), type,
318 List.<Type>nil(), methodClass),
319 sym);
320 sym.members().enter(unboxMethod);
321 }
322 }
323
324 @Override
325 public boolean isTerminal() {
326 return completer.isTerminal();
327 }
328 };
329 }
330
331 // Enter a synthetic class that is used to mark classes in ct.sym.
332 // This class does not have a class file.
333 private Type enterSyntheticAnnotation(String name) {
334 // for now, leave the module null, to prevent problems from synthesizing the
335 // existence of a class in any specific module, including noModule
336 ClassType type = (ClassType)enterClass(java_base, names.fromString(name)).type;
337 ClassSymbol sym = (ClassSymbol)type.tsym;
338 sym.completer = Completer.NULL_COMPLETER;
339 sym.flags_field = PUBLIC|ACYCLIC|ANNOTATION|INTERFACE;
340 sym.erasure_field = type;
341 sym.members_field = WriteableScope.create(sym);
342 type.typarams_field = List.nil();
343 type.allparams_field = List.nil();
344 type.supertype_field = annotationType;
345 type.interfaces_field = List.nil();
346 return type;
347 }
348
349 /** Constructor; enters all predefined identifiers and operators
350 * into symbol table.
351 */
352 protected Symtab(Context context) throws CompletionFailure {
353 context.put(symtabKey, this);
354
355 names = Names.instance(context);
356
357 // Create the unknown type
358 unknownType = new UnknownType();
359
360 messages = JavacMessages.instance(context);
361
362 rootPackage = new PackageSymbol(names.empty, null);
363
364 // create the basic builtin symbols
365 unnamedModule = new ModuleSymbol(names.empty, null) {
366 @Override
367 public String toString() {
368 return messages.getLocalizedString("compiler.misc.unnamed.module");
369 }
370 };
371 addRootPackageFor(unnamedModule);
372
373 errModule = new ModuleSymbol(names.empty, null) { };
374 addRootPackageFor(errModule);
375
376 noModule = new ModuleSymbol(names.empty, null) {
377 @Override public boolean isNoModule() {
378 return true;
379 }
380 };
381 addRootPackageFor(noModule);
382
383 noSymbol = new TypeSymbol(NIL, 0, names.empty, Type.noType, rootPackage) {
384 @Override @DefinedBy(Api.LANGUAGE_MODEL)
385 public <R, P> R accept(ElementVisitor<R, P> v, P p) {
386 return v.visitUnknown(this, p);
387 }
388 };
389
390 // create the error symbols
391 errSymbol = new ClassSymbol(PUBLIC|STATIC|ACYCLIC, names.any, null, rootPackage);
392 errType = new ErrorType(errSymbol, Type.noType);
393
394 unknownSymbol = new ClassSymbol(PUBLIC|STATIC|ACYCLIC, names.fromString("<any?>"), null, rootPackage);
395 unknownSymbol.members_field = new Scope.ErrorScope(unknownSymbol);
396 unknownSymbol.type = unknownType;
397
398 // initialize builtin types
399 initType(byteType, "byte", "Byte");
400 initType(shortType, "short", "Short");
401 initType(charType, "char", "Character");
402 initType(intType, "int", "Integer");
403 initType(longType, "long", "Long");
404 initType(floatType, "float", "Float");
405 initType(doubleType, "double", "Double");
406 initType(booleanType, "boolean", "Boolean");
407 initType(voidType, "void", "Void");
408 initType(botType, "<nulltype>");
409 initType(errType, errSymbol);
410 initType(unknownType, unknownSymbol);
411
412 // the builtin class of all arrays
413 arrayClass = new ClassSymbol(PUBLIC|ACYCLIC, names.Array, noSymbol);
414
415 // VGJ
416 boundClass = new ClassSymbol(PUBLIC|ACYCLIC, names.Bound, noSymbol);
417 boundClass.members_field = new Scope.ErrorScope(boundClass);
418
419 // the builtin class of all methods
420 methodClass = new ClassSymbol(PUBLIC|ACYCLIC, names.Method, noSymbol);
421 methodClass.members_field = new Scope.ErrorScope(boundClass);
422
423 // Create class to hold all predefined constants and operations.
424 predefClass = new ClassSymbol(PUBLIC|ACYCLIC, names.empty, rootPackage);
425 WriteableScope scope = WriteableScope.create(predefClass);
426 predefClass.members_field = scope;
427
428 // Get the initial completer for Symbols from the ClassFinder
429 initialCompleter = ClassFinder.instance(context).getCompleter();
430 rootPackage.members_field = WriteableScope.create(rootPackage);
431
432 // Enter symbols for basic types.
433 scope.enter(byteType.tsym);
434 scope.enter(shortType.tsym);
435 scope.enter(charType.tsym);
436 scope.enter(intType.tsym);
437 scope.enter(longType.tsym);
438 scope.enter(floatType.tsym);
439 scope.enter(doubleType.tsym);
440 scope.enter(booleanType.tsym);
441 scope.enter(errType.tsym);
442
443 // Enter symbol for the errSymbol
444 scope.enter(errSymbol);
445
446 Source source = Source.instance(context);
447 Options options = Options.instance(context);
448 boolean noModules = options.isSet("noModules");
449 if (source.allowModules() && !noModules) {
450 java_base = enterModule(names.java_base);
451 //avoid completing java.base during the Symtab initialization
452 java_base.completer = Completer.NULL_COMPLETER;
453 java_base.visiblePackages = Collections.emptyMap();
454 } else {
455 java_base = noModule;
456 }
457
458 // Get the initial completer for ModuleSymbols from Modules
459 moduleCompleter = Modules.instance(context).getCompleter();
460
461 // Enter predefined classes. All are assumed to be in the java.base module.
462 objectType = enterClass("java.lang.Object");
463 objectsType = enterClass("java.util.Objects");
464 classType = enterClass("java.lang.Class");
465 stringType = enterClass("java.lang.String");
466 stringBufferType = enterClass("java.lang.StringBuffer");
467 stringBuilderType = enterClass("java.lang.StringBuilder");
468 cloneableType = enterClass("java.lang.Cloneable");
469 throwableType = enterClass("java.lang.Throwable");
470 serializableType = enterClass("java.io.Serializable");
471 serializedLambdaType = enterClass("java.lang.invoke.SerializedLambda");
472 varHandleType = enterClass("java.lang.invoke.VarHandle");
473 methodHandleType = enterClass("java.lang.invoke.MethodHandle");
474 methodHandleLookupType = enterClass("java.lang.invoke.MethodHandles$Lookup");
475 methodTypeType = enterClass("java.lang.invoke.MethodType");
476 errorType = enterClass("java.lang.Error");
477 illegalArgumentExceptionType = enterClass("java.lang.IllegalArgumentException");
478 interruptedExceptionType = enterClass("java.lang.InterruptedException");
479 exceptionType = enterClass("java.lang.Exception");
480 runtimeExceptionType = enterClass("java.lang.RuntimeException");
481 classNotFoundExceptionType = enterClass("java.lang.ClassNotFoundException");
482 noClassDefFoundErrorType = enterClass("java.lang.NoClassDefFoundError");
483 noSuchFieldErrorType = enterClass("java.lang.NoSuchFieldError");
484 assertionErrorType = enterClass("java.lang.AssertionError");
485 cloneNotSupportedExceptionType = enterClass("java.lang.CloneNotSupportedException");
486 annotationType = enterClass("java.lang.annotation.Annotation");
487 classLoaderType = enterClass("java.lang.ClassLoader");
488 enumSym = enterClass(java_base, names.java_lang_Enum);
489 enumFinalFinalize =
490 new MethodSymbol(PROTECTED|FINAL|HYPOTHETICAL,
491 names.finalize,
492 new MethodType(List.<Type>nil(), voidType,
493 List.<Type>nil(), methodClass),
494 enumSym);
495 listType = enterClass("java.util.List");
496 collectionsType = enterClass("java.util.Collections");
497 comparableType = enterClass("java.lang.Comparable");
498 comparatorType = enterClass("java.util.Comparator");
499 arraysType = enterClass("java.util.Arrays");
500 iterableType = enterClass("java.lang.Iterable");
501 iteratorType = enterClass("java.util.Iterator");
502 annotationTargetType = enterClass("java.lang.annotation.Target");
503 overrideType = enterClass("java.lang.Override");
504 retentionType = enterClass("java.lang.annotation.Retention");
505 deprecatedType = enterClass("java.lang.Deprecated");
506 suppressWarningsType = enterClass("java.lang.SuppressWarnings");
507 supplierType = enterClass("java.util.function.Supplier");
508 inheritedType = enterClass("java.lang.annotation.Inherited");
509 repeatableType = enterClass("java.lang.annotation.Repeatable");
510 documentedType = enterClass("java.lang.annotation.Documented");
511 elementTypeType = enterClass("java.lang.annotation.ElementType");
512 systemType = enterClass("java.lang.System");
513 autoCloseableType = enterClass("java.lang.AutoCloseable");
514 autoCloseableClose = new MethodSymbol(PUBLIC,
515 names.close,
516 new MethodType(List.<Type>nil(), voidType,
517 List.of(exceptionType), methodClass),
518 autoCloseableType.tsym);
519 trustMeType = enterClass("java.lang.SafeVarargs");
520 nativeHeaderType = enterClass("java.lang.annotation.Native");
521 lambdaMetafactory = enterClass("java.lang.invoke.LambdaMetafactory");
522 stringConcatFactory = enterClass("java.lang.invoke.StringConcatFactory");
523 functionalInterfaceType = enterClass("java.lang.FunctionalInterface");
524
525 synthesizeEmptyInterfaceIfMissing(autoCloseableType);
526 synthesizeEmptyInterfaceIfMissing(cloneableType);
527 synthesizeEmptyInterfaceIfMissing(serializableType);
528 synthesizeEmptyInterfaceIfMissing(lambdaMetafactory);
529 synthesizeEmptyInterfaceIfMissing(serializedLambdaType);
530 synthesizeEmptyInterfaceIfMissing(stringConcatFactory);
531 synthesizeBoxTypeIfMissing(doubleType);
532 synthesizeBoxTypeIfMissing(floatType);
533 synthesizeBoxTypeIfMissing(voidType);
534
535 // Enter a synthetic class that is used to mark internal
536 // proprietary classes in ct.sym. This class does not have a
537 // class file.
538 proprietaryType = enterSyntheticAnnotation("sun.Proprietary+Annotation");
539
540 // Enter a synthetic class that is used to provide profile info for
541 // classes in ct.sym. This class does not have a class file.
542 profileType = enterSyntheticAnnotation("jdk.Profile+Annotation");
543 MethodSymbol m = new MethodSymbol(PUBLIC | ABSTRACT, names.value, intType, profileType.tsym);
544 profileType.tsym.members().enter(m);
545
546 // Enter a class for arrays.
547 // The class implements java.lang.Cloneable and java.io.Serializable.
548 // It has a final length field and a clone method.
549 ClassType arrayClassType = (ClassType)arrayClass.type;
550 arrayClassType.supertype_field = objectType;
551 arrayClassType.interfaces_field = List.of(cloneableType, serializableType);
552 arrayClass.members_field = WriteableScope.create(arrayClass);
553 lengthVar = new VarSymbol(
554 PUBLIC | FINAL,
555 names.length,
556 intType,
557 arrayClass);
558 arrayClass.members().enter(lengthVar);
559 arrayCloneMethod = new MethodSymbol(
560 PUBLIC,
561 names.clone,
562 new MethodType(List.<Type>nil(), objectType,
563 List.<Type>nil(), methodClass),
564 arrayClass);
565 arrayClass.members().enter(arrayCloneMethod);
566
567 if (java_base != noModule)
568 java_base.completer = sym -> moduleCompleter.complete(sym); //bootstrap issues
569
570 }
571
572 /** Define a new class given its name and owner.
573 */
574 public ClassSymbol defineClass(Name name, Symbol owner) {
575 ClassSymbol c = new ClassSymbol(0, name, owner);
576 c.completer = initialCompleter;
577 return c;
578 }
579
580 /** Create a new toplevel or member class symbol with given name
581 * and owner and enter in `classes' unless already there.
582 */
583 public ClassSymbol enterClass(ModuleSymbol msym, Name name, TypeSymbol owner) {
584 Assert.checkNonNull(msym);
585 Name flatname = TypeSymbol.formFlatName(name, owner);
586 ClassSymbol c = getClass(msym, flatname);
587 if (c == null) {
588 c = defineClass(name, owner);
589 doEnterClass(msym, c);
590 } else if ((c.name != name || c.owner != owner) && owner.kind == TYP && c.owner.kind == PCK) {
591 // reassign fields of classes that might have been loaded with
592 // their flat names.
593 c.owner.members().remove(c);
594 c.name = name;
595 c.owner = owner;
596 c.fullname = ClassSymbol.formFullName(name, owner);
597 }
598 return c;
599 }
600
601 public ClassSymbol getClass(ModuleSymbol msym, Name flatName) {
602 Assert.checkNonNull(msym, () -> flatName.toString());
603 return classes.getOrDefault(flatName, Collections.emptyMap()).get(msym);
604 }
605
606 public PackageSymbol lookupPackage(ModuleSymbol msym, Name flatName) {
607 Assert.checkNonNull(msym);
608
609 if (flatName.isEmpty()) {
610 //unnamed packages only from the current module - visiblePackages contains *root* package, not unnamed package!
611 return msym.unnamedPackage;
612 }
613
614 if (msym == noModule) {
615 return enterPackage(msym, flatName);
616 }
617
618 msym.complete();
619
620 PackageSymbol pack;
621
622 pack = msym.visiblePackages.get(flatName);
623
624 if (pack != null)
625 return pack;
626
627 pack = getPackage(msym, flatName);
628
629 if (pack != null && pack.exists())
630 return pack;
631
632 boolean dependsOnUnnamed = msym.requires != null &&
633 msym.requires.stream()
634 .map(rd -> rd.module)
635 .anyMatch(mod -> mod == unnamedModule);
636
637 if (dependsOnUnnamed) {
638 //msyms depends on the unnamed module, for which we generally don't know
639 //the list of packages it "exports" ahead of time. So try to lookup the package in the
640 //current module, and in the unnamed module and see if it exists in one of them
641 PackageSymbol unnamedPack = getPackage(unnamedModule, flatName);
642
643 if (unnamedPack != null && unnamedPack.exists()) {
644 msym.visiblePackages.put(unnamedPack.fullname, unnamedPack);
645 return unnamedPack;
646 }
647
648 pack = enterPackage(msym, flatName);
649 pack.complete();
650 if (pack.exists())
651 return pack;
652
653 unnamedPack = enterPackage(unnamedModule, flatName);
654 unnamedPack.complete();
655 if (unnamedPack.exists()) {
656 msym.visiblePackages.put(unnamedPack.fullname, unnamedPack);
657 return unnamedPack;
658 }
659
660 return pack;
661 }
662
663 return enterPackage(msym, flatName);
664 }
665
666 private static final Map<ModuleSymbol, ClassSymbol> EMPTY = new HashMap<>();
667
668 public void removeClass(ModuleSymbol msym, Name flatName) {
669 classes.getOrDefault(flatName, EMPTY).remove(msym);
670 }
671
672 public Iterable<ClassSymbol> getAllClasses() {
673 return () -> Iterators.createCompoundIterator(classes.values(), v -> v.values().iterator());
674 }
675
676 private void doEnterClass(ModuleSymbol msym, ClassSymbol cs) {
677 classes.computeIfAbsent(cs.flatname, n -> new HashMap<>()).put(msym, cs);
678 }
679
680 /** Create a new member or toplevel class symbol with given flat name
681 * and enter in `classes' unless already there.
682 */
683 public ClassSymbol enterClass(ModuleSymbol msym, Name flatname) {
684 Assert.checkNonNull(msym);
685 PackageSymbol ps = lookupPackage(msym, Convert.packagePart(flatname));
686 Assert.checkNonNull(ps);
687 Assert.checkNonNull(ps.modle);
688 ClassSymbol c = getClass(ps.modle, flatname);
689 if (c == null) {
690 c = defineClass(Convert.shortName(flatname), ps);
691 doEnterClass(ps.modle, c);
692 return c;
693 } else
694 return c;
695 }
696
697 /** Check to see if a package exists, given its fully qualified name.
698 */
699 public boolean packageExists(ModuleSymbol msym, Name fullname) {
700 Assert.checkNonNull(msym);
701 return lookupPackage(msym, fullname).exists();
702 }
703
704 /** Make a package, given its fully qualified name.
705 */
706 public PackageSymbol enterPackage(ModuleSymbol currModule, Name fullname) {
707 Assert.checkNonNull(currModule);
708 PackageSymbol p = getPackage(currModule, fullname);
709 if (p == null) {
710 Assert.check(!fullname.isEmpty(), () -> "rootPackage missing!; currModule: " + currModule);
711 p = new PackageSymbol(
712 Convert.shortName(fullname),
713 enterPackage(currModule, Convert.packagePart(fullname)));
714 p.completer = initialCompleter;
715 p.modle = currModule;
716 doEnterPackage(currModule, p);
717 }
718 return p;
719 }
720
721 private void doEnterPackage(ModuleSymbol msym, PackageSymbol pack) {
722 packages.computeIfAbsent(pack.fullname, n -> new HashMap<>()).put(msym, pack);
723 msym.enclosedPackages = msym.enclosedPackages.prepend(pack);
724 }
725
726 private void addRootPackageFor(ModuleSymbol module) {
727 doEnterPackage(module, rootPackage);
728 PackageSymbol unnamedPackage = new PackageSymbol(names.empty, rootPackage) {
729 @Override
730 public String toString() {
731 return messages.getLocalizedString("compiler.misc.unnamed.package");
732 }
733 };
734 unnamedPackage.modle = module;
735 unnamedPackage.completer = sym -> initialCompleter.complete(sym);
736 module.unnamedPackage = unnamedPackage;
737 }
738
739 public PackageSymbol getPackage(ModuleSymbol module, Name fullname) {
740 return packages.getOrDefault(fullname, Collections.emptyMap()).get(module);
741 }
742
743 public ModuleSymbol enterModule(Name name) {
744 ModuleSymbol msym = modules.get(name);
745 if (msym == null) {
746 msym = ModuleSymbol.create(name, names.module_info);
747 addRootPackageFor(msym);
748 msym.completer = sym -> moduleCompleter.complete(sym); //bootstrap issues
749 modules.put(name, msym);
750 }
751 return msym;
752 }
753
754 public void enterModule(ModuleSymbol msym, Name name) {
755 Assert.checkNull(modules.get(name));
756 Assert.checkNull(msym.name);
757 msym.name = name;
758 addRootPackageFor(msym);
759 ClassSymbol info = msym.module_info;
760 info.fullname = msym.name.append('.', names.module_info);
761 info.flatname = info.fullname;
762 modules.put(name, msym);
763 }
764
765 public ModuleSymbol getModule(Name name) {
766 return modules.get(name);
767 }
768
769 //temporary:
770 public ModuleSymbol inferModule(Name packageName) {
771 if (packageName.isEmpty())
772 return java_base == noModule ? noModule : unnamedModule;//!
773
774 ModuleSymbol msym = null;
775 Map<ModuleSymbol,PackageSymbol> map = packages.get(packageName);
776 if (map == null)
777 return null;
778 for (Map.Entry<ModuleSymbol,PackageSymbol> e: map.entrySet()) {
779 if (!e.getValue().members().isEmpty()) {
780 if (msym == null) {
781 msym = e.getKey();
782 } else {
783 return null;
784 }
785 }
786 }
787 return msym;
788 }
789
790 public List<ModuleSymbol> listPackageModules(Name packageName) {
791 if (packageName.isEmpty())
792 return List.nil();
793
794 List<ModuleSymbol> result = List.nil();
795 Map<ModuleSymbol,PackageSymbol> map = packages.get(packageName);
796 if (map != null) {
797 for (Map.Entry<ModuleSymbol, PackageSymbol> e: map.entrySet()) {
798 if (!e.getValue().members().isEmpty()) {
799 result = result.prepend(e.getKey());
800 }
801 }
802 }
803 return result;
804 }
805
806 public Collection<ModuleSymbol> getAllModules() {
807 return modules.values();
808 }
809 }