1 /*
2 * Copyright (c) 2009, 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
27 package com.sun.tools.javac.comp;
28
29 import java.io.IOException;
30 import java.util.Arrays;
31 import java.util.Collection;
32 import java.util.Collections;
33 import java.util.EnumSet;
34 import java.util.HashMap;
35 import java.util.HashSet;
36 import java.util.LinkedHashMap;
37 import java.util.LinkedHashSet;
38 import java.util.Map;
39 import java.util.Set;
40 import java.util.function.Consumer;
41 import java.util.function.Predicate;
42 import java.util.regex.Matcher;
43 import java.util.regex.Pattern;
44 import java.util.stream.Collectors;
45 import java.util.stream.Stream;
46
47 import javax.lang.model.SourceVersion;
48 import javax.tools.JavaFileManager;
49 import javax.tools.JavaFileManager.Location;
50 import javax.tools.JavaFileObject;
51 import javax.tools.JavaFileObject.Kind;
52 import javax.tools.StandardLocation;
53
54 import com.sun.source.tree.ModuleTree.ModuleKind;
55 import com.sun.tools.javac.code.ClassFinder;
56 import com.sun.tools.javac.code.DeferredLintHandler;
57 import com.sun.tools.javac.code.Directive;
58 import com.sun.tools.javac.code.Directive.ExportsDirective;
59 import com.sun.tools.javac.code.Directive.ExportsFlag;
60 import com.sun.tools.javac.code.Directive.OpensDirective;
61 import com.sun.tools.javac.code.Directive.OpensFlag;
62 import com.sun.tools.javac.code.Directive.RequiresDirective;
63 import com.sun.tools.javac.code.Directive.RequiresFlag;
64 import com.sun.tools.javac.code.Directive.UsesDirective;
65 import com.sun.tools.javac.code.Flags;
66 import com.sun.tools.javac.code.Flags.Flag;
67 import com.sun.tools.javac.code.Lint.LintCategory;
68 import com.sun.tools.javac.code.ModuleFinder;
69 import com.sun.tools.javac.code.Source;
70 import com.sun.tools.javac.code.Source.Feature;
71 import com.sun.tools.javac.code.Symbol;
72 import com.sun.tools.javac.code.Symbol.ClassSymbol;
73 import com.sun.tools.javac.code.Symbol.Completer;
74 import com.sun.tools.javac.code.Symbol.CompletionFailure;
75 import com.sun.tools.javac.code.Symbol.MethodSymbol;
76 import com.sun.tools.javac.code.Symbol.ModuleFlags;
77 import com.sun.tools.javac.code.Symbol.ModuleSymbol;
78 import com.sun.tools.javac.code.Symbol.PackageSymbol;
79 import com.sun.tools.javac.code.Symtab;
80 import com.sun.tools.javac.code.Type;
81 import com.sun.tools.javac.code.Types;
82 import com.sun.tools.javac.jvm.ClassWriter;
83 import com.sun.tools.javac.jvm.JNIWriter;
84 import com.sun.tools.javac.jvm.Target;
85 import com.sun.tools.javac.main.Option;
86 import com.sun.tools.javac.resources.CompilerProperties.Errors;
87 import com.sun.tools.javac.resources.CompilerProperties.Warnings;
88 import com.sun.tools.javac.tree.JCTree;
89 import com.sun.tools.javac.tree.JCTree.JCCompilationUnit;
90 import com.sun.tools.javac.tree.JCTree.JCDirective;
91 import com.sun.tools.javac.tree.JCTree.JCExports;
92 import com.sun.tools.javac.tree.JCTree.JCExpression;
93 import com.sun.tools.javac.tree.JCTree.JCModuleDecl;
94 import com.sun.tools.javac.tree.JCTree.JCOpens;
95 import com.sun.tools.javac.tree.JCTree.JCProvides;
96 import com.sun.tools.javac.tree.JCTree.JCRequires;
97 import com.sun.tools.javac.tree.JCTree.JCUses;
98 import com.sun.tools.javac.tree.JCTree.Tag;
99 import com.sun.tools.javac.tree.TreeInfo;
100 import com.sun.tools.javac.util.Assert;
101 import com.sun.tools.javac.util.Context;
102 import com.sun.tools.javac.util.JCDiagnostic.DiagnosticPosition;
103 import com.sun.tools.javac.util.List;
104 import com.sun.tools.javac.util.ListBuffer;
105 import com.sun.tools.javac.util.Log;
106 import com.sun.tools.javac.util.Name;
107 import com.sun.tools.javac.util.Names;
108 import com.sun.tools.javac.util.Options;
109
110 import static com.sun.tools.javac.code.Flags.ABSTRACT;
111 import static com.sun.tools.javac.code.Flags.ENUM;
112 import static com.sun.tools.javac.code.Flags.PUBLIC;
113 import static com.sun.tools.javac.code.Flags.UNATTRIBUTED;
114
115 import com.sun.tools.javac.code.Kinds;
116
117 import static com.sun.tools.javac.code.Kinds.Kind.ERR;
118 import static com.sun.tools.javac.code.Kinds.Kind.MDL;
119 import static com.sun.tools.javac.code.Kinds.Kind.MTH;
120
121 import com.sun.tools.javac.code.Symbol.ModuleResolutionFlags;
122
123 import static com.sun.tools.javac.code.TypeTag.CLASS;
124
125 /**
126 * TODO: fill in
127 *
128 * <p><b>This is NOT part of any supported API.
129 * If you write code that depends on this, you do so at your own risk.
130 * This code and its internal interfaces are subject to change or
131 * deletion without notice.</b>
132 */
133 public class Modules extends JCTree.Visitor {
134 private static final String ALL_SYSTEM = "ALL-SYSTEM";
135 private static final String ALL_MODULE_PATH = "ALL-MODULE-PATH";
136
137 private final Log log;
138 private final Names names;
139 private final Symtab syms;
140 private final Attr attr;
141 private final Check chk;
142 private final DeferredLintHandler deferredLintHandler;
143 private final TypeEnvs typeEnvs;
144 private final Types types;
145 private final JavaFileManager fileManager;
146 private final ModuleFinder moduleFinder;
147 private final Source source;
148 private final Target target;
149 private final boolean allowModules;
150 private final boolean allowAccessIntoSystem;
151
152 public final boolean multiModuleMode;
153
154 private final Name java_se;
155 private final Name java_;
156
157 ModuleSymbol defaultModule;
158
159 private final String addExportsOpt;
160 private Map<ModuleSymbol, Set<ExportsDirective>> addExports;
161 private final String addReadsOpt;
162 private Map<ModuleSymbol, Set<RequiresDirective>> addReads;
163 private final String addModsOpt;
164 private final Set<String> extraAddMods = new HashSet<>();
165 private final String limitModsOpt;
166 private final Set<String> extraLimitMods = new HashSet<>();
167 private final String moduleVersionOpt;
168
169 private final boolean lintOptions;
170
171 private Set<ModuleSymbol> rootModules = null;
172 private final Set<ModuleSymbol> warnedMissing = new HashSet<>();
173
174 public PackageNameFinder findPackageInFile;
175
176 public static Modules instance(Context context) {
177 Modules instance = context.get(Modules.class);
178 if (instance == null)
179 instance = new Modules(context);
180 return instance;
181 }
182
183 protected Modules(Context context) {
184 context.put(Modules.class, this);
185 log = Log.instance(context);
186 names = Names.instance(context);
187 syms = Symtab.instance(context);
188 attr = Attr.instance(context);
189 chk = Check.instance(context);
190 deferredLintHandler = DeferredLintHandler.instance(context);
191 typeEnvs = TypeEnvs.instance(context);
192 moduleFinder = ModuleFinder.instance(context);
193 types = Types.instance(context);
194 fileManager = context.get(JavaFileManager.class);
195 source = Source.instance(context);
196 target = Target.instance(context);
197 allowModules = Feature.MODULES.allowedInSource(source);
198 Options options = Options.instance(context);
199
200 allowAccessIntoSystem = options.isUnset(Option.RELEASE);
201 lintOptions = options.isUnset(Option.XLINT_CUSTOM, "-" + LintCategory.OPTIONS.option);
202
203 multiModuleMode = fileManager.hasLocation(StandardLocation.MODULE_SOURCE_PATH);
204 ClassWriter classWriter = ClassWriter.instance(context);
205 classWriter.multiModuleMode = multiModuleMode;
206 JNIWriter jniWriter = JNIWriter.instance(context);
207 jniWriter.multiModuleMode = multiModuleMode;
208
209 java_se = names.fromString("java.se");
210 java_ = names.fromString("java.");
211
212 addExportsOpt = options.get(Option.ADD_EXPORTS);
213 addReadsOpt = options.get(Option.ADD_READS);
214 addModsOpt = options.get(Option.ADD_MODULES);
215 limitModsOpt = options.get(Option.LIMIT_MODULES);
216 moduleVersionOpt = options.get(Option.MODULE_VERSION);
217 }
218 //where
219 private static final String XMODULES_PREFIX = "-Xmodule:";
220
221 int depth = -1;
222
223 public void addExtraAddModules(String... extras) {
224 extraAddMods.addAll(Arrays.asList(extras));
225 }
226
227 boolean inInitModules;
228 public void initModules(List<JCCompilationUnit> trees) {
229 Assert.check(!inInitModules);
230 try {
231 inInitModules = true;
232 Assert.checkNull(rootModules);
233 enter(trees, modules -> {
234 Assert.checkNull(rootModules);
235 Assert.checkNull(allModules);
236 this.rootModules = modules;
237 setupAllModules(); //initialize the module graph
238 Assert.checkNonNull(allModules);
239 inInitModules = false;
240 }, null);
241 } finally {
242 inInitModules = false;
243 }
244 }
245
246 public boolean enter(List<JCCompilationUnit> trees, ClassSymbol c) {
247 Assert.check(rootModules != null || inInitModules || !allowModules);
248 return enter(trees, modules -> {}, c);
249 }
250
251 private boolean enter(List<JCCompilationUnit> trees, Consumer<Set<ModuleSymbol>> init, ClassSymbol c) {
252 if (!allowModules) {
253 for (JCCompilationUnit tree: trees) {
254 tree.modle = syms.noModule;
255 }
256 defaultModule = syms.noModule;
257 return true;
258 }
259
260 int startErrors = log.nerrors;
261
262 depth++;
263 try {
264 // scan trees for module defs
265 Set<ModuleSymbol> roots = enterModules(trees, c);
266
267 setCompilationUnitModules(trees, roots, c);
268
269 init.accept(roots);
270
271 for (ModuleSymbol msym: roots) {
272 msym.complete();
273 }
274 } catch (CompletionFailure ex) {
275 chk.completionError(null, ex);
276 } finally {
277 depth--;
278 }
279
280 return (log.nerrors == startErrors);
281 }
282
283 public Completer getCompleter() {
284 return mainCompleter;
285 }
286
287 public ModuleSymbol getDefaultModule() {
288 return defaultModule;
289 }
290
291 public boolean modulesInitialized() {
292 return allModules != null;
293 }
294
295 private Set<ModuleSymbol> enterModules(List<JCCompilationUnit> trees, ClassSymbol c) {
296 Set<ModuleSymbol> modules = new LinkedHashSet<>();
297 for (JCCompilationUnit tree : trees) {
298 JavaFileObject prev = log.useSource(tree.sourcefile);
299 try {
300 enterModule(tree, c, modules);
301 } finally {
302 log.useSource(prev);
303 }
304 }
305 return modules;
306 }
307
308
309 private void enterModule(JCCompilationUnit toplevel, ClassSymbol c, Set<ModuleSymbol> modules) {
310 boolean isModuleInfo = toplevel.sourcefile.isNameCompatible("module-info", Kind.SOURCE);
311 boolean isModuleDecl = toplevel.getModuleDecl() != null;
312 if (isModuleDecl) {
313 JCModuleDecl decl = toplevel.getModuleDecl();
314 if (!isModuleInfo) {
315 log.error(decl.pos(), Errors.ModuleDeclSbInModuleInfoJava);
316 }
317 Name name = TreeInfo.fullName(decl.qualId);
318 ModuleSymbol sym;
319 if (c != null) {
320 sym = (ModuleSymbol) c.owner;
321 Assert.checkNonNull(sym.name);
322 Name treeName = TreeInfo.fullName(decl.qualId);
323 if (sym.name != treeName) {
324 log.error(decl.pos(), Errors.ModuleNameMismatch(name, sym.name));
325 }
326 } else {
327 sym = syms.enterModule(name);
328 if (sym.module_info.sourcefile != null && sym.module_info.sourcefile != toplevel.sourcefile) {
329 log.error(decl.pos(), Errors.DuplicateModule(sym));
330 return;
331 }
332 }
333 sym.completer = getSourceCompleter(toplevel);
334 sym.module_info.sourcefile = toplevel.sourcefile;
335 decl.sym = sym;
336
337 if (multiModuleMode || modules.isEmpty()) {
338 modules.add(sym);
339 } else {
340 log.error(toplevel.pos(), Errors.TooManyModules);
341 }
342
343 Env<AttrContext> provisionalEnv = new Env<>(decl, null);
344
345 provisionalEnv.toplevel = toplevel;
346 typeEnvs.put(sym, provisionalEnv);
347 } else if (isModuleInfo) {
348 if (multiModuleMode) {
349 JCTree tree = toplevel.defs.isEmpty() ? toplevel : toplevel.defs.head;
350 log.error(tree.pos(), Errors.ExpectedModule);
351 }
352 }
353 }
354
355 private void setCompilationUnitModules(List<JCCompilationUnit> trees, Set<ModuleSymbol> rootModules, ClassSymbol c) {
356 // update the module for each compilation unit
357 if (multiModuleMode) {
358 boolean patchesAutomaticModules = false;
359 for (JCCompilationUnit tree: trees) {
360 if (tree.defs.isEmpty()) {
361 tree.modle = syms.unnamedModule;
362 continue;
363 }
364
365 JavaFileObject prev = log.useSource(tree.sourcefile);
366 try {
367 Location msplocn = getModuleLocation(tree);
368 Location plocn = fileManager.hasLocation(StandardLocation.PATCH_MODULE_PATH) ?
369 fileManager.getLocationForModule(StandardLocation.PATCH_MODULE_PATH,
370 tree.sourcefile) :
371 null;
372
373 if (plocn != null) {
374 Name name = names.fromString(fileManager.inferModuleName(plocn));
375 ModuleSymbol msym = moduleFinder.findModule(name);
376 tree.modle = msym;
377 rootModules.add(msym);
378 patchesAutomaticModules |= (msym.flags_field & Flags.AUTOMATIC_MODULE) != 0;
379
380 if (msplocn != null) {
381 Name mspname = names.fromString(fileManager.inferModuleName(msplocn));
382 if (name != mspname) {
383 log.error(tree.pos(), Errors.FilePatchedAndMsp(name, mspname));
384 }
385 }
386 } else if (msplocn != null) {
387 if (tree.getModuleDecl() != null) {
388 JavaFileObject canonical =
389 fileManager.getJavaFileForInput(msplocn, "module-info", Kind.SOURCE);
390 if (canonical == null || !fileManager.isSameFile(canonical, tree.sourcefile)) {
391 log.error(tree.pos(), Errors.ModuleNotFoundOnModuleSourcePath);
392 }
393 }
394 Name name = names.fromString(fileManager.inferModuleName(msplocn));
395 ModuleSymbol msym;
396 JCModuleDecl decl = tree.getModuleDecl();
397 if (decl != null) {
398 msym = decl.sym;
399 if (msym.name != name) {
400 log.error(decl.qualId, Errors.ModuleNameMismatch(msym.name, name));
401 }
402 } else {
403 if (tree.getPackage() == null) {
404 log.error(tree.pos(), Errors.UnnamedPkgNotAllowedNamedModules);
405 }
406 msym = syms.enterModule(name);
407 }
408 if (msym.sourceLocation == null) {
409 msym.sourceLocation = msplocn;
410 if (fileManager.hasLocation(StandardLocation.PATCH_MODULE_PATH)) {
411 msym.patchLocation = fileManager.getLocationForModule(
412 StandardLocation.PATCH_MODULE_PATH, msym.name.toString());
413 }
414 if (fileManager.hasLocation(StandardLocation.CLASS_OUTPUT)) {
415 Location outputLocn = fileManager.getLocationForModule(
416 StandardLocation.CLASS_OUTPUT, msym.name.toString());
417 if (msym.patchLocation == null) {
418 msym.classLocation = outputLocn;
419 } else {
420 msym.patchOutputLocation = outputLocn;
421 }
422 }
423 }
424 tree.modle = msym;
425 rootModules.add(msym);
426 } else if (c != null && c.packge().modle == syms.unnamedModule) {
427 tree.modle = syms.unnamedModule;
428 } else {
429 if (tree.getModuleDecl() != null) {
430 log.error(tree.pos(), Errors.ModuleNotFoundOnModuleSourcePath);
431 } else {
432 log.error(tree.pos(), Errors.NotInModuleOnModuleSourcePath);
433 }
434 tree.modle = syms.errModule;
435 }
436 } catch (IOException e) {
437 throw new Error(e); // FIXME
438 } finally {
439 log.useSource(prev);
440 }
441 }
442 if (!patchesAutomaticModules) {
443 checkNoAllModulePath();
444 }
445 if (syms.unnamedModule.sourceLocation == null) {
446 syms.unnamedModule.completer = getUnnamedModuleCompleter();
447 syms.unnamedModule.sourceLocation = StandardLocation.SOURCE_PATH;
448 syms.unnamedModule.classLocation = StandardLocation.CLASS_PATH;
449 }
450 defaultModule = syms.unnamedModule;
451 } else {
452 ModuleSymbol module = null;
453 if (defaultModule == null) {
454 String moduleOverride = singleModuleOverride(trees);
455 switch (rootModules.size()) {
456 case 0:
457 try {
458 defaultModule = moduleFinder.findSingleModule();
459 } catch (CompletionFailure cf) {
460 chk.completionError(null, cf);
461 defaultModule = syms.unnamedModule;
462 }
463 if (defaultModule == syms.unnamedModule) {
464 if (moduleOverride != null) {
465 defaultModule = moduleFinder.findModule(names.fromString(moduleOverride));
466 defaultModule.patchOutputLocation = StandardLocation.CLASS_OUTPUT;
467 if ((defaultModule.flags_field & Flags.AUTOMATIC_MODULE) == 0) {
468 checkNoAllModulePath();
469 }
470 } else {
471 // Question: why not do findAllModules and initVisiblePackages here?
472 // i.e. body of unnamedModuleCompleter
473 defaultModule.completer = getUnnamedModuleCompleter();
474 defaultModule.sourceLocation = StandardLocation.SOURCE_PATH;
475 defaultModule.classLocation = StandardLocation.CLASS_PATH;
476 }
477 } else {
478 checkNoAllModulePath();
479 defaultModule.complete();
480 // Question: why not do completeModule here?
481 defaultModule.completer = sym -> completeModule((ModuleSymbol) sym);
482 defaultModule.sourceLocation = StandardLocation.SOURCE_PATH;
483 }
484 rootModules.add(defaultModule);
485 break;
486 case 1:
487 checkNoAllModulePath();
488 defaultModule = rootModules.iterator().next();
489 defaultModule.sourceLocation = StandardLocation.SOURCE_PATH;
490 if (fileManager.hasLocation(StandardLocation.PATCH_MODULE_PATH)) {
491 try {
492 defaultModule.patchLocation = fileManager.getLocationForModule(
493 StandardLocation.PATCH_MODULE_PATH, defaultModule.name.toString());
494 } catch (IOException ex) {
495 throw new Error(ex);
496 }
497 }
498 if (defaultModule.patchLocation == null) {
499 defaultModule.classLocation = StandardLocation.CLASS_OUTPUT;
500 } else {
501 defaultModule.patchOutputLocation = StandardLocation.CLASS_OUTPUT;
502 }
503 break;
504 default:
505 Assert.error("too many modules");
506 }
507 } else if (rootModules.size() == 1) {
508 module = rootModules.iterator().next();
509 module.complete();
510 module.completer = sym -> completeModule((ModuleSymbol) sym);
511 } else {
512 Assert.check(rootModules.isEmpty());
513 Assert.checkNonNull(c);
514 module = c.packge().modle;
515 rootModules.add(module);
516 }
517
518 if (defaultModule != syms.unnamedModule) {
519 syms.unnamedModule.completer = getUnnamedModuleCompleter();
520 syms.unnamedModule.classLocation = StandardLocation.CLASS_PATH;
521 }
522
523 if (module == null) {
524 module = defaultModule;
525 }
526
527 for (JCCompilationUnit tree : trees) {
528 if (defaultModule != syms.unnamedModule
529 && defaultModule.sourceLocation == StandardLocation.SOURCE_PATH
530 && fileManager.hasLocation(StandardLocation.SOURCE_PATH)) {
531 checkSourceLocation(tree, module);
532 }
533 tree.modle = module;
534 }
535 }
536 }
537
538 private void checkSourceLocation(JCCompilationUnit tree, ModuleSymbol msym) {
539 try {
540 JavaFileObject fo = tree.sourcefile;
541 if (fileManager.contains(msym.sourceLocation, fo)) {
542 return;
543 }
544 if (msym.patchLocation != null && fileManager.contains(msym.patchLocation, fo)) {
545 return;
546 }
547 if (fileManager.hasLocation(StandardLocation.SOURCE_OUTPUT)) {
548 if (fileManager.contains(StandardLocation.SOURCE_OUTPUT, fo)) {
549 return;
550 }
551 } else {
552 if (fileManager.contains(StandardLocation.CLASS_OUTPUT, fo)) {
553 return;
554 }
555 }
556 } catch (IOException e) {
557 throw new Error(e);
558 }
559
560 JavaFileObject prev = log.useSource(tree.sourcefile);
561 try {
562 log.error(tree.pos(), Errors.FileSbOnSourceOrPatchPathForModule);
563 } finally {
564 log.useSource(prev);
565 }
566 }
567
568 private String singleModuleOverride(List<JCCompilationUnit> trees) {
569 if (!fileManager.hasLocation(StandardLocation.PATCH_MODULE_PATH)) {
570 return null;
571 }
572
573 Set<String> override = new LinkedHashSet<>();
574 for (JCCompilationUnit tree : trees) {
575 JavaFileObject fo = tree.sourcefile;
576
577 try {
578 Location loc =
579 fileManager.getLocationForModule(StandardLocation.PATCH_MODULE_PATH, fo);
580
581 if (loc != null) {
582 override.add(fileManager.inferModuleName(loc));
583 }
584 } catch (IOException ex) {
585 throw new Error(ex);
586 }
587 }
588
589 switch (override.size()) {
590 case 0: return null;
591 case 1: return override.iterator().next();
592 default:
593 log.error(Errors.TooManyPatchedModules(override));
594 return null;
595 }
596 }
597
598 /**
599 * Determine the location for the module on the module source path
600 * or source output directory which contains a given CompilationUnit.
601 * If the source output directory is unset, the class output directory
602 * will be checked instead.
603 * {@code null} is returned if no such module can be found.
604 * @param tree the compilation unit tree
605 * @return the location for the enclosing module
606 * @throws IOException if there is a problem while searching for the module.
607 */
608 private Location getModuleLocation(JCCompilationUnit tree) throws IOException {
609 JavaFileObject fo = tree.sourcefile;
610
611 Location loc =
612 fileManager.getLocationForModule(StandardLocation.MODULE_SOURCE_PATH, fo);
613 if (loc == null) {
614 Location sourceOutput = fileManager.hasLocation(StandardLocation.SOURCE_OUTPUT) ?
615 StandardLocation.SOURCE_OUTPUT : StandardLocation.CLASS_OUTPUT;
616 loc =
617 fileManager.getLocationForModule(sourceOutput, fo);
618 }
619 return loc;
620 }
621
622 private void checkNoAllModulePath() {
623 if (addModsOpt != null && Arrays.asList(addModsOpt.split(",")).contains(ALL_MODULE_PATH)) {
624 log.error(Errors.AddmodsAllModulePathInvalid);
625 }
626 }
627
628 private final Completer mainCompleter = new Completer() {
629 @Override
630 public void complete(Symbol sym) throws CompletionFailure {
631 ModuleSymbol msym = moduleFinder.findModule((ModuleSymbol) sym);
632
633 if (msym.kind == ERR) {
634 //make sure the module is initialized:
635 msym.directives = List.nil();
636 msym.exports = List.nil();
637 msym.provides = List.nil();
638 msym.requires = List.nil();
639 msym.uses = List.nil();
640 } else if ((msym.flags_field & Flags.AUTOMATIC_MODULE) != 0) {
641 setupAutomaticModule(msym);
642 } else {
643 msym.module_info.complete();
644 }
645
646 // If module-info comes from a .java file, the underlying
647 // call of classFinder.fillIn will have called through the
648 // source completer, to Enter, and then to Modules.enter,
649 // which will call completeModule.
650 // But, if module-info comes from a .class file, the underlying
651 // call of classFinder.fillIn will just call ClassReader to read
652 // the .class file, and so we call completeModule here.
653 if (msym.module_info.classfile == null || msym.module_info.classfile.getKind() == Kind.CLASS) {
654 completeModule(msym);
655 }
656 }
657
658 @Override
659 public String toString() {
660 return "mainCompleter";
661 }
662 };
663
664 private void setupAutomaticModule(ModuleSymbol msym) throws CompletionFailure {
665 try {
666 ListBuffer<Directive> directives = new ListBuffer<>();
667 ListBuffer<ExportsDirective> exports = new ListBuffer<>();
668 Set<String> seenPackages = new HashSet<>();
669
670 for (JavaFileObject clazz : fileManager.list(msym.classLocation, "", EnumSet.of(Kind.CLASS), true)) {
671 String binName = fileManager.inferBinaryName(msym.classLocation, clazz);
672 String pack = binName.lastIndexOf('.') != (-1) ? binName.substring(0, binName.lastIndexOf('.')) : ""; //unnamed package????
673 if (seenPackages.add(pack)) {
674 ExportsDirective d = new ExportsDirective(syms.enterPackage(msym, names.fromString(pack)), null);
675 //TODO: opens?
676 directives.add(d);
677 exports.add(d);
678 }
679 }
680
681 msym.exports = exports.toList();
682 msym.provides = List.nil();
683 msym.requires = List.nil();
684 msym.uses = List.nil();
685 msym.directives = directives.toList();
686 } catch (IOException ex) {
687 throw new IllegalStateException(ex);
688 }
689 }
690
691 private void completeAutomaticModule(ModuleSymbol msym) throws CompletionFailure {
692 ListBuffer<Directive> directives = new ListBuffer<>();
693
694 directives.addAll(msym.directives);
695
696 ListBuffer<RequiresDirective> requires = new ListBuffer<>();
697
698 for (ModuleSymbol ms : allModules()) {
699 if (ms == syms.unnamedModule || ms == msym)
700 continue;
701 Set<RequiresFlag> flags = (ms.flags_field & Flags.AUTOMATIC_MODULE) != 0 ?
702 EnumSet.of(RequiresFlag.TRANSITIVE) : EnumSet.noneOf(RequiresFlag.class);
703 RequiresDirective d = new RequiresDirective(ms, flags);
704 directives.add(d);
705 requires.add(d);
706 }
707
708 RequiresDirective requiresUnnamed = new RequiresDirective(syms.unnamedModule);
709 directives.add(requiresUnnamed);
710 requires.add(requiresUnnamed);
711
712 msym.requires = requires.toList();
713 msym.directives = directives.toList();
714 }
715
716 private Completer getSourceCompleter(JCCompilationUnit tree) {
717 return new Completer() {
718 @Override
719 public void complete(Symbol sym) throws CompletionFailure {
720 ModuleSymbol msym = (ModuleSymbol) sym;
721 msym.flags_field |= UNATTRIBUTED;
722 ModuleVisitor v = new ModuleVisitor();
723 JavaFileObject prev = log.useSource(tree.sourcefile);
724 JCModuleDecl moduleDecl = tree.getModuleDecl();
725 DiagnosticPosition prevLintPos = deferredLintHandler.setPos(moduleDecl.pos());
726
727 try {
728 moduleDecl.accept(v);
729 completeModule(msym);
730 checkCyclicDependencies(moduleDecl);
731 } finally {
732 log.useSource(prev);
733 deferredLintHandler.setPos(prevLintPos);
734 msym.flags_field &= ~UNATTRIBUTED;
735 }
736 }
737
738 @Override
739 public String toString() {
740 return "SourceCompleter: " + tree.sourcefile.getName();
741 }
742
743 };
744 }
745
746 public boolean isRootModule(ModuleSymbol module) {
747 Assert.checkNonNull(rootModules);
748 return rootModules.contains(module);
749 }
750
751 public Set<ModuleSymbol> getRootModules() {
752 Assert.checkNonNull(rootModules);
753 return rootModules;
754 }
755
756 class ModuleVisitor extends JCTree.Visitor {
757 private ModuleSymbol sym;
758 private final Set<ModuleSymbol> allRequires = new HashSet<>();
759 private final Map<PackageSymbol,List<ExportsDirective>> allExports = new HashMap<>();
760 private final Map<PackageSymbol,List<OpensDirective>> allOpens = new HashMap<>();
761
762 @Override
763 public void visitModuleDef(JCModuleDecl tree) {
764 sym = Assert.checkNonNull(tree.sym);
765
766 if (tree.getModuleType() == ModuleKind.OPEN) {
767 sym.flags.add(ModuleFlags.OPEN);
768 }
769 sym.flags_field |= (tree.mods.flags & Flags.DEPRECATED);
770
771 sym.requires = List.nil();
772 sym.exports = List.nil();
773 sym.opens = List.nil();
774 tree.directives.forEach(t -> t.accept(this));
775 sym.requires = sym.requires.reverse();
776 sym.exports = sym.exports.reverse();
777 sym.opens = sym.opens.reverse();
778 ensureJavaBase();
779 }
780
781 @Override
782 public void visitRequires(JCRequires tree) {
783 ModuleSymbol msym = lookupModule(tree.moduleName);
784 if (msym.kind != MDL) {
785 log.error(tree.moduleName.pos(), Errors.ModuleNotFound(msym));
786 warnedMissing.add(msym);
787 } else if (allRequires.contains(msym)) {
788 log.error(tree.moduleName.pos(), Errors.DuplicateRequires(msym));
789 } else {
790 allRequires.add(msym);
791 Set<RequiresFlag> flags = EnumSet.noneOf(RequiresFlag.class);
792 if (tree.isTransitive) {
793 if (msym == syms.java_base && source.compareTo(Source.JDK10) >= 0) {
794 log.error(tree.pos(), Errors.ModifierNotAllowedHere(names.transitive));
795 } else {
796 flags.add(RequiresFlag.TRANSITIVE);
797 }
798 }
799 if (tree.isStaticPhase) {
800 if (msym == syms.java_base && source.compareTo(Source.JDK10) >= 0) {
801 log.error(tree.pos(), Errors.ModNotAllowedHere(EnumSet.of(Flag.STATIC)));
802 } else {
803 flags.add(RequiresFlag.STATIC_PHASE);
804 }
805 }
806 RequiresDirective d = new RequiresDirective(msym, flags);
807 tree.directive = d;
808 sym.requires = sym.requires.prepend(d);
809 }
810 }
811
812 @Override
813 public void visitExports(JCExports tree) {
814 Name name = TreeInfo.fullName(tree.qualid);
815 PackageSymbol packge = syms.enterPackage(sym, name);
816 attr.setPackageSymbols(tree.qualid, packge);
817
818 List<ExportsDirective> exportsForPackage = allExports.computeIfAbsent(packge, p -> List.nil());
819 for (ExportsDirective d : exportsForPackage) {
820 reportExportsConflict(tree, packge);
821 }
822
823 List<ModuleSymbol> toModules = null;
824 if (tree.moduleNames != null) {
825 Set<ModuleSymbol> to = new LinkedHashSet<>();
826 for (JCExpression n: tree.moduleNames) {
827 ModuleSymbol msym = lookupModule(n);
828 chk.checkModuleExists(n.pos(), msym);
829 for (ExportsDirective d : exportsForPackage) {
830 checkDuplicateExportsToModule(n, msym, d);
831 }
832 if (!to.add(msym)) {
833 reportExportsConflictToModule(n, msym);
834 }
835 }
836 toModules = List.from(to);
837 }
838
839 if (toModules == null || !toModules.isEmpty()) {
840 Set<ExportsFlag> flags = EnumSet.noneOf(ExportsFlag.class);
841 ExportsDirective d = new ExportsDirective(packge, toModules, flags);
842 sym.exports = sym.exports.prepend(d);
843 tree.directive = d;
844
845 allExports.put(packge, exportsForPackage.prepend(d));
846 }
847 }
848
849 private void reportExportsConflict(JCExports tree, PackageSymbol packge) {
850 log.error(tree.qualid.pos(), Errors.ConflictingExports(packge));
851 }
852
853 private void checkDuplicateExportsToModule(JCExpression name, ModuleSymbol msym,
854 ExportsDirective d) {
855 if (d.modules != null) {
856 for (ModuleSymbol other : d.modules) {
857 if (msym == other) {
858 reportExportsConflictToModule(name, msym);
859 }
860 }
861 }
862 }
863
864 private void reportExportsConflictToModule(JCExpression name, ModuleSymbol msym) {
865 log.error(name.pos(), Errors.ConflictingExportsToModule(msym));
866 }
867
868 @Override
869 public void visitOpens(JCOpens tree) {
870 Name name = TreeInfo.fullName(tree.qualid);
871 PackageSymbol packge = syms.enterPackage(sym, name);
872 attr.setPackageSymbols(tree.qualid, packge);
873
874 if (sym.flags.contains(ModuleFlags.OPEN)) {
875 log.error(tree.pos(), Errors.NoOpensUnlessStrong);
876 }
877 List<OpensDirective> opensForPackage = allOpens.computeIfAbsent(packge, p -> List.nil());
878 for (OpensDirective d : opensForPackage) {
879 reportOpensConflict(tree, packge);
880 }
881
882 List<ModuleSymbol> toModules = null;
883 if (tree.moduleNames != null) {
884 Set<ModuleSymbol> to = new LinkedHashSet<>();
885 for (JCExpression n: tree.moduleNames) {
886 ModuleSymbol msym = lookupModule(n);
887 chk.checkModuleExists(n.pos(), msym);
888 for (OpensDirective d : opensForPackage) {
889 checkDuplicateOpensToModule(n, msym, d);
890 }
891 if (!to.add(msym)) {
892 reportOpensConflictToModule(n, msym);
893 }
894 }
895 toModules = List.from(to);
896 }
897
898 if (toModules == null || !toModules.isEmpty()) {
899 Set<OpensFlag> flags = EnumSet.noneOf(OpensFlag.class);
900 OpensDirective d = new OpensDirective(packge, toModules, flags);
901 sym.opens = sym.opens.prepend(d);
902 tree.directive = d;
903
904 allOpens.put(packge, opensForPackage.prepend(d));
905 }
906 }
907
908 private void reportOpensConflict(JCOpens tree, PackageSymbol packge) {
909 log.error(tree.qualid.pos(), Errors.ConflictingOpens(packge));
910 }
911
912 private void checkDuplicateOpensToModule(JCExpression name, ModuleSymbol msym,
913 OpensDirective d) {
914 if (d.modules != null) {
915 for (ModuleSymbol other : d.modules) {
916 if (msym == other) {
917 reportOpensConflictToModule(name, msym);
918 }
919 }
920 }
921 }
922
923 private void reportOpensConflictToModule(JCExpression name, ModuleSymbol msym) {
924 log.error(name.pos(), Errors.ConflictingOpensToModule(msym));
925 }
926
927 @Override
928 public void visitProvides(JCProvides tree) { }
929
930 @Override
931 public void visitUses(JCUses tree) { }
932
933 private void ensureJavaBase() {
934 if (sym.name == names.java_base)
935 return;
936
937 for (RequiresDirective d: sym.requires) {
938 if (d.module.name == names.java_base)
939 return;
940 }
941
942 ModuleSymbol java_base = syms.enterModule(names.java_base);
943 Directive.RequiresDirective d =
944 new Directive.RequiresDirective(java_base,
945 EnumSet.of(Directive.RequiresFlag.MANDATED));
946 sym.requires = sym.requires.prepend(d);
947 }
948
949 private ModuleSymbol lookupModule(JCExpression moduleName) {
950 Name name = TreeInfo.fullName(moduleName);
951 ModuleSymbol msym = moduleFinder.findModule(name);
952 TreeInfo.setSymbol(moduleName, msym);
953 return msym;
954 }
955 }
956
957 public Completer getUsesProvidesCompleter() {
958 return sym -> {
959 ModuleSymbol msym = (ModuleSymbol) sym;
960
961 msym.complete();
962
963 Env<AttrContext> env = typeEnvs.get(msym);
964 UsesProvidesVisitor v = new UsesProvidesVisitor(msym, env);
965 JavaFileObject prev = log.useSource(env.toplevel.sourcefile);
966 JCModuleDecl decl = env.toplevel.getModuleDecl();
967 DiagnosticPosition prevLintPos = deferredLintHandler.setPos(decl.pos());
968
969 try {
970 decl.accept(v);
971 } finally {
972 log.useSource(prev);
973 deferredLintHandler.setPos(prevLintPos);
974 }
975 };
976 }
977
978 class UsesProvidesVisitor extends JCTree.Visitor {
979 private final ModuleSymbol msym;
980 private final Env<AttrContext> env;
981
982 private final Set<ClassSymbol> allUses = new HashSet<>();
983 private final Map<ClassSymbol, Set<ClassSymbol>> allProvides = new HashMap<>();
984
985 public UsesProvidesVisitor(ModuleSymbol msym, Env<AttrContext> env) {
986 this.msym = msym;
987 this.env = env;
988 }
989
990 @Override @SuppressWarnings("unchecked")
991 public void visitModuleDef(JCModuleDecl tree) {
992 msym.directives = List.nil();
993 msym.provides = List.nil();
994 msym.uses = List.nil();
995 tree.directives.forEach(t -> t.accept(this));
996 msym.directives = msym.directives.reverse();
997 msym.provides = msym.provides.reverse();
998 msym.uses = msym.uses.reverse();
999
1000 if (msym.requires.nonEmpty() && msym.requires.head.flags.contains(RequiresFlag.MANDATED))
1001 msym.directives = msym.directives.prepend(msym.requires.head);
1002
1003 msym.directives = msym.directives.appendList(List.from(addReads.getOrDefault(msym, Collections.emptySet())));
1004
1005 checkForCorrectness();
1006 }
1007
1008 @Override
1009 public void visitExports(JCExports tree) {
1010 Iterable<Symbol> packageContent = tree.directive.packge.members().getSymbols();
1011 List<JavaFileObject> filesToCheck = List.nil();
1012 boolean packageNotEmpty = false;
1013 for (Symbol sym : packageContent) {
1014 if (sym.kind != Kinds.Kind.TYP)
1015 continue;
1016 ClassSymbol csym = (ClassSymbol) sym;
1017 if (sym.completer.isTerminal() ||
1018 csym.classfile.getKind() == Kind.CLASS) {
1019 packageNotEmpty = true;
1020 filesToCheck = List.nil();
1021 break;
1022 }
1023 if (csym.classfile.getKind() == Kind.SOURCE) {
1024 filesToCheck = filesToCheck.prepend(csym.classfile);
1025 }
1026 }
1027 for (JavaFileObject jfo : filesToCheck) {
1028 if (findPackageInFile.findPackageNameOf(jfo) == tree.directive.packge.fullname) {
1029 packageNotEmpty = true;
1030 break;
1031 }
1032 }
1033 if (!packageNotEmpty) {
1034 log.error(tree.qualid.pos(), Errors.PackageEmptyOrNotFound(tree.directive.packge));
1035 }
1036 msym.directives = msym.directives.prepend(tree.directive);
1037 }
1038
1039 @Override
1040 public void visitOpens(JCOpens tree) {
1041 chk.checkPackageExistsForOpens(tree.qualid, tree.directive.packge);
1042 msym.directives = msym.directives.prepend(tree.directive);
1043 }
1044
1045 MethodSymbol noArgsConstructor(ClassSymbol tsym) {
1046 for (Symbol sym : tsym.members().getSymbolsByName(names.init)) {
1047 MethodSymbol mSym = (MethodSymbol)sym;
1048 if (mSym.params().isEmpty()) {
1049 return mSym;
1050 }
1051 }
1052 return null;
1053 }
1054
1055 MethodSymbol factoryMethod(ClassSymbol tsym) {
1056 for (Symbol sym : tsym.members().getSymbolsByName(names.provider, sym -> sym.kind == MTH)) {
1057 MethodSymbol mSym = (MethodSymbol)sym;
1058 if (mSym.isStatic() && (mSym.flags() & Flags.PUBLIC) != 0 && mSym.params().isEmpty()) {
1059 return mSym;
1060 }
1061 }
1062 return null;
1063 }
1064
1065 Map<Directive.ProvidesDirective, JCProvides> directiveToTreeMap = new HashMap<>();
1066
1067 @Override
1068 public void visitProvides(JCProvides tree) {
1069 Type st = attr.attribType(tree.serviceName, env, syms.objectType);
1070 ClassSymbol service = (ClassSymbol) st.tsym;
1071 if (allProvides.containsKey(service)) {
1072 log.error(tree.serviceName.pos(), Errors.RepeatedProvidesForService(service));
1073 }
1074 ListBuffer<ClassSymbol> impls = new ListBuffer<>();
1075 for (JCExpression implName : tree.implNames) {
1076 Type it;
1077 boolean prevVisitingServiceImplementation = env.info.visitingServiceImplementation;
1078 try {
1079 env.info.visitingServiceImplementation = true;
1080 it = attr.attribType(implName, env, syms.objectType);
1081 } finally {
1082 env.info.visitingServiceImplementation = prevVisitingServiceImplementation;
1083 }
1084 ClassSymbol impl = (ClassSymbol) it.tsym;
1085 if ((impl.flags_field & PUBLIC) == 0) {
1086 log.error(implName.pos(), Errors.NotDefPublic(impl, impl.location()));
1087 }
1088 //find provider factory:
1089 MethodSymbol factory = factoryMethod(impl);
1090 if (factory != null) {
1091 Type returnType = factory.type.getReturnType();
1092 if (!types.isSubtype(returnType, st)) {
1093 log.error(implName.pos(), Errors.ServiceImplementationProviderReturnMustBeSubtypeOfServiceInterface);
1094 }
1095 } else {
1096 if (!types.isSubtype(it, st)) {
1097 log.error(implName.pos(), Errors.ServiceImplementationMustBeSubtypeOfServiceInterface);
1098 } else if ((impl.flags() & ABSTRACT) != 0) {
1099 log.error(implName.pos(), Errors.ServiceImplementationIsAbstract(impl));
1100 } else if (impl.isInner()) {
1101 log.error(implName.pos(), Errors.ServiceImplementationIsInner(impl));
1102 } else {
1103 MethodSymbol constr = noArgsConstructor(impl);
1104 if (constr == null) {
1105 log.error(implName.pos(), Errors.ServiceImplementationDoesntHaveANoArgsConstructor(impl));
1106 } else if ((constr.flags() & PUBLIC) == 0) {
1107 log.error(implName.pos(), Errors.ServiceImplementationNoArgsConstructorNotPublic(impl));
1108 }
1109 }
1110 }
1111 if (it.hasTag(CLASS)) {
1112 if (allProvides.computeIfAbsent(service, s -> new HashSet<>()).add(impl)) {
1113 impls.append(impl);
1114 } else {
1115 log.error(implName.pos(), Errors.DuplicateProvides(service, impl));
1116 }
1117 }
1118 }
1119 if (st.hasTag(CLASS) && !impls.isEmpty()) {
1120 Directive.ProvidesDirective d = new Directive.ProvidesDirective(service, impls.toList());
1121 msym.provides = msym.provides.prepend(d);
1122 msym.directives = msym.directives.prepend(d);
1123 directiveToTreeMap.put(d, tree);
1124 }
1125 }
1126
1127 @Override
1128 public void visitRequires(JCRequires tree) {
1129 if (tree.directive != null && allModules().contains(tree.directive.module)) {
1130 chk.checkDeprecated(tree.moduleName.pos(), msym, tree.directive.module);
1131 chk.checkModuleRequires(tree.moduleName.pos(), tree.directive);
1132 msym.directives = msym.directives.prepend(tree.directive);
1133 }
1134 }
1135
1136 @Override
1137 public void visitUses(JCUses tree) {
1138 Type st = attr.attribType(tree.qualid, env, syms.objectType);
1139 Symbol sym = TreeInfo.symbol(tree.qualid);
1140 if ((sym.flags() & ENUM) != 0) {
1141 log.error(tree.qualid.pos(), Errors.ServiceDefinitionIsEnum(st.tsym));
1142 } else if (st.hasTag(CLASS)) {
1143 ClassSymbol service = (ClassSymbol) st.tsym;
1144 if (allUses.add(service)) {
1145 Directive.UsesDirective d = new Directive.UsesDirective(service);
1146 msym.uses = msym.uses.prepend(d);
1147 msym.directives = msym.directives.prepend(d);
1148 } else {
1149 log.error(tree.pos(), Errors.DuplicateUses(service));
1150 }
1151 }
1152 }
1153
1154 private void checkForCorrectness() {
1155 for (Directive.ProvidesDirective provides : msym.provides) {
1156 JCProvides tree = directiveToTreeMap.get(provides);
1157 for (ClassSymbol impl : provides.impls) {
1158 /* The implementation must be defined in the same module as the provides directive
1159 * (else, error)
1160 */
1161 PackageSymbol implementationDefiningPackage = impl.packge();
1162 if (implementationDefiningPackage.modle != msym) {
1163 // TODO: should use tree for the implementation name, not the entire provides tree
1164 // TODO: should improve error message to identify the implementation type
1165 log.error(tree.pos(), Errors.ServiceImplementationNotInRightModule(implementationDefiningPackage.modle));
1166 }
1167
1168 /* There is no inherent requirement that module that provides a service should actually
1169 * use it itself. However, it is a pointless declaration if the service package is not
1170 * exported and there is no uses for the service.
1171 */
1172 PackageSymbol interfaceDeclaringPackage = provides.service.packge();
1173 boolean isInterfaceDeclaredInCurrentModule = interfaceDeclaringPackage.modle == msym;
1174 boolean isInterfaceExportedFromAReadableModule =
1175 msym.visiblePackages.get(interfaceDeclaringPackage.fullname) == interfaceDeclaringPackage;
1176 if (isInterfaceDeclaredInCurrentModule && !isInterfaceExportedFromAReadableModule) {
1177 // ok the interface is declared in this module. Let's check if it's exported
1178 boolean warn = true;
1179 for (ExportsDirective export : msym.exports) {
1180 if (interfaceDeclaringPackage == export.packge) {
1181 warn = false;
1182 break;
1183 }
1184 }
1185 if (warn) {
1186 for (UsesDirective uses : msym.uses) {
1187 if (provides.service == uses.service) {
1188 warn = false;
1189 break;
1190 }
1191 }
1192 }
1193 if (warn) {
1194 log.warning(tree.pos(), Warnings.ServiceProvidedButNotExportedOrUsed(provides.service));
1195 }
1196 }
1197 }
1198 }
1199 }
1200 }
1201
1202 private Set<ModuleSymbol> allModules;
1203
1204 public Set<ModuleSymbol> allModules() {
1205 Assert.checkNonNull(allModules);
1206 return allModules;
1207 }
1208
1209 private void setupAllModules() {
1210 Assert.checkNonNull(rootModules);
1211 Assert.checkNull(allModules);
1212
1213 Set<ModuleSymbol> observable;
1214
1215 if (limitModsOpt == null && extraLimitMods.isEmpty()) {
1216 observable = null;
1217 } else {
1218 Set<ModuleSymbol> limitMods = new HashSet<>();
1219 if (limitModsOpt != null) {
1220 for (String limit : limitModsOpt.split(",")) {
1221 if (!isValidName(limit))
1222 continue;
1223 limitMods.add(syms.enterModule(names.fromString(limit)));
1224 }
1225 }
1226 for (String limit : extraLimitMods) {
1227 limitMods.add(syms.enterModule(names.fromString(limit)));
1228 }
1229 observable = computeTransitiveClosure(limitMods, rootModules, null);
1230 observable.addAll(rootModules);
1231 if (lintOptions) {
1232 for (ModuleSymbol msym : limitMods) {
1233 if (!observable.contains(msym)) {
1234 log.warning(LintCategory.OPTIONS,
1235 Warnings.ModuleForOptionNotFound(Option.LIMIT_MODULES, msym));
1236 }
1237 }
1238 }
1239 }
1240
1241 Predicate<ModuleSymbol> observablePred = sym ->
1242 (observable == null) ? (moduleFinder.findModule(sym).kind != ERR) : observable.contains(sym);
1243 Predicate<ModuleSymbol> systemModulePred = sym -> (sym.flags() & Flags.SYSTEM_MODULE) != 0;
1244 Set<ModuleSymbol> enabledRoot = new LinkedHashSet<>();
1245
1246 if (rootModules.contains(syms.unnamedModule)) {
1247 Predicate<ModuleSymbol> jdkModulePred;
1248 if (target.allApiModulesAreRoots()) {
1249 jdkModulePred = sym -> {
1250 sym.complete();
1251 return sym.exports.stream().anyMatch(e -> e.modules == null);
1252 };
1253 } else {
1254 ModuleSymbol javaSE = syms.getModule(java_se);
1255 if (javaSE != null && (observable == null || observable.contains(javaSE))) {
1256 jdkModulePred = sym -> {
1257 sym.complete();
1258 return !sym.name.startsWith(java_)
1259 && sym.exports.stream().anyMatch(e -> e.modules == null);
1260 };
1261 enabledRoot.add(javaSE);
1262 } else {
1263 jdkModulePred = sym -> true;
1264 }
1265 }
1266
1267 Predicate<ModuleSymbol> noIncubatorPred = sym -> {
1268 sym.complete();
1269 return !sym.resolutionFlags.contains(ModuleResolutionFlags.DO_NOT_RESOLVE_BY_DEFAULT);
1270 };
1271
1272 for (ModuleSymbol sym : new HashSet<>(syms.getAllModules())) {
1273 try {
1274 if (systemModulePred.test(sym) && observablePred.test(sym) && jdkModulePred.test(sym) && noIncubatorPred.test(sym)) {
1275 enabledRoot.add(sym);
1276 }
1277 } catch (CompletionFailure ex) {
1278 chk.completionError(null, ex);
1279 }
1280 }
1281 }
1282
1283 enabledRoot.addAll(rootModules);
1284
1285 if (addModsOpt != null || !extraAddMods.isEmpty()) {
1286 Set<String> fullAddMods = new HashSet<>();
1287 fullAddMods.addAll(extraAddMods);
1288
1289 if (addModsOpt != null) {
1290 fullAddMods.addAll(Arrays.asList(addModsOpt.split(",")));
1291 }
1292
1293 for (String added : fullAddMods) {
1294 Stream<ModuleSymbol> modules;
1295 switch (added) {
1296 case ALL_SYSTEM:
1297 modules = new HashSet<>(syms.getAllModules())
1298 .stream()
1299 .filter(systemModulePred.and(observablePred));
1300 break;
1301 case ALL_MODULE_PATH:
1302 modules = new HashSet<>(syms.getAllModules())
1303 .stream()
1304 .filter(systemModulePred.negate().and(observablePred));
1305 break;
1306 default:
1307 if (!isValidName(added))
1308 continue;
1309 modules = Stream.of(syms.enterModule(names.fromString(added)));
1310 break;
1311 }
1312 modules.forEach(sym -> {
1313 enabledRoot.add(sym);
1314 if (observable != null)
1315 observable.add(sym);
1316 });
1317 }
1318 }
1319
1320 Set<ModuleSymbol> result = computeTransitiveClosure(enabledRoot, rootModules, observable);
1321
1322 result.add(syms.unnamedModule);
1323
1324 boolean hasAutomatic = result.stream().anyMatch(IS_AUTOMATIC);
1325
1326 if (hasAutomatic) {
1327 syms.getAllModules()
1328 .stream()
1329 .filter(IS_AUTOMATIC)
1330 .forEach(result::add);
1331 }
1332
1333 String incubatingModules = result.stream()
1334 .filter(msym -> msym.resolutionFlags.contains(ModuleResolutionFlags.WARN_INCUBATING))
1335 .map(msym -> msym.name.toString())
1336 .collect(Collectors.joining(","));
1337
1338 if (!incubatingModules.isEmpty()) {
1339 log.warning(Warnings.IncubatingModules(incubatingModules));
1340 }
1341
1342 allModules = result;
1343
1344 //add module versions from options, if any:
1345 if (moduleVersionOpt != null) {
1346 Name version = names.fromString(moduleVersionOpt);
1347 rootModules.forEach(m -> m.version = version);
1348 }
1349 }
1350 //where:
1351 private static final Predicate<ModuleSymbol> IS_AUTOMATIC =
1352 m -> (m.flags_field & Flags.AUTOMATIC_MODULE) != 0;
1353
1354 public boolean isInModuleGraph(ModuleSymbol msym) {
1355 return allModules == null || allModules.contains(msym);
1356 }
1357
1358 private Set<ModuleSymbol> computeTransitiveClosure(Set<? extends ModuleSymbol> base,
1359 Set<? extends ModuleSymbol> rootModules,
1360 Set<ModuleSymbol> observable) {
1361 List<ModuleSymbol> primaryTodo = List.nil();
1362 List<ModuleSymbol> secondaryTodo = List.nil();
1363
1364 for (ModuleSymbol ms : base) {
1365 if (rootModules.contains(ms)) {
1366 primaryTodo = primaryTodo.prepend(ms);
1367 } else {
1368 secondaryTodo = secondaryTodo.prepend(ms);
1369 }
1370 }
1371
1372 Set<ModuleSymbol> result = new LinkedHashSet<>();
1373 result.add(syms.java_base);
1374
1375 while (primaryTodo.nonEmpty() || secondaryTodo.nonEmpty()) {
1376 try {
1377 ModuleSymbol current;
1378 boolean isPrimaryTodo;
1379 if (primaryTodo.nonEmpty()) {
1380 current = primaryTodo.head;
1381 primaryTodo = primaryTodo.tail;
1382 isPrimaryTodo = true;
1383 } else {
1384 current = secondaryTodo.head;
1385 secondaryTodo = secondaryTodo.tail;
1386 isPrimaryTodo = false;
1387 }
1388 if (observable != null && !observable.contains(current))
1389 continue;
1390 if (!result.add(current) || current == syms.unnamedModule || ((current.flags_field & Flags.AUTOMATIC_MODULE) != 0))
1391 continue;
1392 current.complete();
1393 if (current.kind == ERR && (isPrimaryTodo || base.contains(current)) && warnedMissing.add(current)) {
1394 log.error(Errors.ModuleNotFound(current));
1395 }
1396 for (RequiresDirective rd : current.requires) {
1397 if (rd.module == syms.java_base) continue;
1398 if ((rd.isTransitive() && isPrimaryTodo) || rootModules.contains(current)) {
1399 primaryTodo = primaryTodo.prepend(rd.module);
1400 } else {
1401 secondaryTodo = secondaryTodo.prepend(rd.module);
1402 }
1403 }
1404 } catch (CompletionFailure ex) {
1405 chk.completionError(null, ex);
1406 }
1407 }
1408
1409 return result;
1410 }
1411
1412 public ModuleSymbol getObservableModule(Name name) {
1413 ModuleSymbol mod = syms.getModule(name);
1414
1415 if (allModules().contains(mod)) {
1416 return mod;
1417 }
1418
1419 return null;
1420 }
1421
1422 private Completer getUnnamedModuleCompleter() {
1423 moduleFinder.findAllModules();
1424 return new Symbol.Completer() {
1425 @Override
1426 public void complete(Symbol sym) throws CompletionFailure {
1427 if (inInitModules) {
1428 sym.completer = this;
1429 return ;
1430 }
1431 ModuleSymbol msym = (ModuleSymbol) sym;
1432 Set<ModuleSymbol> allModules = new HashSet<>(allModules());
1433 allModules.remove(syms.unnamedModule);
1434 for (ModuleSymbol m : allModules) {
1435 m.complete();
1436 }
1437 initVisiblePackages(msym, allModules);
1438 }
1439
1440 @Override
1441 public String toString() {
1442 return "unnamedModule Completer";
1443 }
1444 };
1445 }
1446
1447 private final Map<ModuleSymbol, Set<ModuleSymbol>> requiresTransitiveCache = new HashMap<>();
1448
1449 private void completeModule(ModuleSymbol msym) {
1450 if (inInitModules) {
1451 msym.completer = sym -> completeModule(msym);
1452 return ;
1453 }
1454
1455 if ((msym.flags_field & Flags.AUTOMATIC_MODULE) != 0) {
1456 completeAutomaticModule(msym);
1457 }
1458
1459 Assert.checkNonNull(msym.requires);
1460
1461 initAddReads();
1462
1463 msym.requires = msym.requires.appendList(List.from(addReads.getOrDefault(msym, Collections.emptySet())));
1464
1465 List<RequiresDirective> requires = msym.requires;
1466
1467 while (requires.nonEmpty()) {
1468 if (!allModules().contains(requires.head.module)) {
1469 Env<AttrContext> env = typeEnvs.get(msym);
1470 if (env != null) {
1471 JavaFileObject origSource = log.useSource(env.toplevel.sourcefile);
1472 try {
1473 log.error(/*XXX*/env.tree, Errors.ModuleNotFound(requires.head.module));
1474 } finally {
1475 log.useSource(origSource);
1476 }
1477 } else {
1478 Assert.check((msym.flags() & Flags.AUTOMATIC_MODULE) == 0);
1479 }
1480 msym.requires = List.filter(msym.requires, requires.head);
1481 }
1482 requires = requires.tail;
1483 }
1484
1485 Set<ModuleSymbol> readable = new LinkedHashSet<>();
1486 Set<ModuleSymbol> requiresTransitive = new HashSet<>();
1487
1488 for (RequiresDirective d : msym.requires) {
1489 d.module.complete();
1490 readable.add(d.module);
1491 Set<ModuleSymbol> s = retrieveRequiresTransitive(d.module);
1492 Assert.checkNonNull(s, () -> "no entry in cache for " + d.module);
1493 readable.addAll(s);
1494 if (d.flags.contains(RequiresFlag.TRANSITIVE)) {
1495 requiresTransitive.add(d.module);
1496 requiresTransitive.addAll(s);
1497 }
1498 }
1499
1500 requiresTransitiveCache.put(msym, requiresTransitive);
1501 initVisiblePackages(msym, readable);
1502 for (ExportsDirective d: msym.exports) {
1503 if (d.packge != null) {
1504 d.packge.modle = msym;
1505 }
1506 }
1507 }
1508
1509 private Set<ModuleSymbol> retrieveRequiresTransitive(ModuleSymbol msym) {
1510 Set<ModuleSymbol> requiresTransitive = requiresTransitiveCache.get(msym);
1511
1512 if (requiresTransitive == null) {
1513 //the module graph may contain cycles involving automatic modules or --add-reads edges
1514 requiresTransitive = new HashSet<>();
1515
1516 Set<ModuleSymbol> seen = new HashSet<>();
1517 List<ModuleSymbol> todo = List.of(msym);
1518
1519 while (todo.nonEmpty()) {
1520 ModuleSymbol current = todo.head;
1521 todo = todo.tail;
1522 if (!seen.add(current))
1523 continue;
1524 requiresTransitive.add(current);
1525 current.complete();
1526 Iterable<? extends RequiresDirective> requires;
1527 if (current != syms.unnamedModule) {
1528 Assert.checkNonNull(current.requires, () -> current + ".requires == null; " + msym);
1529 requires = current.requires;
1530 for (RequiresDirective rd : requires) {
1531 if (rd.isTransitive())
1532 todo = todo.prepend(rd.module);
1533 }
1534 } else {
1535 for (ModuleSymbol mod : allModules()) {
1536 todo = todo.prepend(mod);
1537 }
1538 }
1539 }
1540
1541 requiresTransitive.remove(msym);
1542 }
1543
1544 return requiresTransitive;
1545 }
1546
1547 private void initVisiblePackages(ModuleSymbol msym, Collection<ModuleSymbol> readable) {
1548 initAddExports();
1549
1550 msym.visiblePackages = new LinkedHashMap<>();
1551 msym.readModules = new HashSet<>(readable);
1552
1553 Map<Name, ModuleSymbol> seen = new HashMap<>();
1554
1555 for (ModuleSymbol rm : readable) {
1556 if (rm == syms.unnamedModule)
1557 continue;
1558 addVisiblePackages(msym, seen, rm, rm.exports);
1559 }
1560
1561 addExports.forEach((exportsFrom, exports) -> {
1562 if (msym.readModules.contains(exportsFrom)) {
1563 addVisiblePackages(msym, seen, exportsFrom, exports);
1564 }
1565 });
1566 }
1567
1568 private void addVisiblePackages(ModuleSymbol msym,
1569 Map<Name, ModuleSymbol> seenPackages,
1570 ModuleSymbol exportsFrom,
1571 Collection<ExportsDirective> exports) {
1572 for (ExportsDirective d : exports) {
1573 if (d.modules == null || d.modules.contains(msym)) {
1574 Name packageName = d.packge.fullname;
1575 ModuleSymbol previousModule = seenPackages.get(packageName);
1576
1577 if (previousModule != null && previousModule != exportsFrom) {
1578 Env<AttrContext> env = typeEnvs.get(msym);
1579 JavaFileObject origSource = env != null ? log.useSource(env.toplevel.sourcefile)
1580 : null;
1581 DiagnosticPosition pos = env != null ? env.tree.pos() : null;
1582 try {
1583 if (msym.isUnnamed()) {
1584 log.error(pos, Errors.PackageClashFromRequiresInUnnamed(packageName,
1585 previousModule, exportsFrom));
1586 } else {
1587 log.error(pos, Errors.PackageClashFromRequires(msym, packageName,
1588 previousModule, exportsFrom));
1589 }
1590 } finally {
1591 if (env != null)
1592 log.useSource(origSource);
1593 }
1594 continue;
1595 }
1596
1597 seenPackages.put(packageName, exportsFrom);
1598 msym.visiblePackages.put(d.packge.fullname, d.packge);
1599 }
1600 }
1601 }
1602
1603 private void initAddExports() {
1604 if (addExports != null)
1605 return;
1606
1607 addExports = new LinkedHashMap<>();
1608 Set<ModuleSymbol> unknownModules = new HashSet<>();
1609
1610 if (addExportsOpt == null)
1611 return;
1612
1613 Pattern ep = Pattern.compile("([^/]+)/([^=]+)=(.*)");
1614 for (String s: addExportsOpt.split("\0+")) {
1615 if (s.isEmpty())
1616 continue;
1617 Matcher em = ep.matcher(s);
1618 if (!em.matches()) {
1619 continue;
1620 }
1621
1622 // Terminology comes from
1623 // --add-exports module/package=target,...
1624 // Compare to
1625 // module module { exports package to target, ... }
1626 String moduleName = em.group(1);
1627 String packageName = em.group(2);
1628 String targetNames = em.group(3);
1629
1630 if (!isValidName(moduleName))
1631 continue;
1632
1633 ModuleSymbol msym = syms.enterModule(names.fromString(moduleName));
1634 if (!isKnownModule(msym, unknownModules))
1635 continue;
1636
1637 if (!isValidName(packageName))
1638 continue;
1639
1640 if (!allowAccessIntoSystem && (msym.flags() & Flags.SYSTEM_MODULE) != 0) {
1641 log.error(Errors.AddExportsWithRelease(msym));
1642 continue;
1643 }
1644
1645 PackageSymbol p = syms.enterPackage(msym, names.fromString(packageName));
1646 p.modle = msym; // TODO: do we need this?
1647
1648 List<ModuleSymbol> targetModules = List.nil();
1649 for (String toModule : targetNames.split("[ ,]+")) {
1650 ModuleSymbol m;
1651 if (toModule.equals("ALL-UNNAMED")) {
1652 m = syms.unnamedModule;
1653 } else {
1654 if (!isValidName(toModule))
1655 continue;
1656 m = syms.enterModule(names.fromString(toModule));
1657 if (!isKnownModule(m, unknownModules))
1658 continue;
1659 }
1660 targetModules = targetModules.prepend(m);
1661 }
1662
1663 Set<ExportsDirective> extra = addExports.computeIfAbsent(msym, _x -> new LinkedHashSet<>());
1664 ExportsDirective d = new ExportsDirective(p, targetModules);
1665 extra.add(d);
1666 }
1667 }
1668
1669 private boolean isKnownModule(ModuleSymbol msym, Set<ModuleSymbol> unknownModules) {
1670 if (allModules.contains(msym)) {
1671 return true;
1672 }
1673
1674 if (!unknownModules.contains(msym)) {
1675 if (lintOptions) {
1676 log.warning(LintCategory.OPTIONS,
1677 Warnings.ModuleForOptionNotFound(Option.ADD_EXPORTS, msym));
1678 }
1679 unknownModules.add(msym);
1680 }
1681 return false;
1682 }
1683
1684 private void initAddReads() {
1685 if (addReads != null)
1686 return;
1687
1688 addReads = new LinkedHashMap<>();
1689
1690 if (addReadsOpt == null)
1691 return;
1692
1693 Pattern rp = Pattern.compile("([^=]+)=(.*)");
1694 for (String s : addReadsOpt.split("\0+")) {
1695 if (s.isEmpty())
1696 continue;
1697 Matcher rm = rp.matcher(s);
1698 if (!rm.matches()) {
1699 continue;
1700 }
1701
1702 // Terminology comes from
1703 // --add-reads source-module=target-module,...
1704 // Compare to
1705 // module source-module { requires target-module; ... }
1706 String sourceName = rm.group(1);
1707 String targetNames = rm.group(2);
1708
1709 if (!isValidName(sourceName))
1710 continue;
1711
1712 ModuleSymbol msym = syms.enterModule(names.fromString(sourceName));
1713 if (!allModules.contains(msym)) {
1714 if (lintOptions) {
1715 log.warning(Warnings.ModuleForOptionNotFound(Option.ADD_READS, msym));
1716 }
1717 continue;
1718 }
1719
1720 if (!allowAccessIntoSystem && (msym.flags() & Flags.SYSTEM_MODULE) != 0) {
1721 log.error(Errors.AddReadsWithRelease(msym));
1722 continue;
1723 }
1724
1725 for (String targetName : targetNames.split("[ ,]+", -1)) {
1726 ModuleSymbol targetModule;
1727 if (targetName.equals("ALL-UNNAMED")) {
1728 targetModule = syms.unnamedModule;
1729 } else {
1730 if (!isValidName(targetName))
1731 continue;
1732 targetModule = syms.enterModule(names.fromString(targetName));
1733 if (!allModules.contains(targetModule)) {
1734 if (lintOptions) {
1735 log.warning(LintCategory.OPTIONS, Warnings.ModuleForOptionNotFound(Option.ADD_READS, targetModule));
1736 }
1737 continue;
1738 }
1739 }
1740 addReads.computeIfAbsent(msym, m -> new HashSet<>())
1741 .add(new RequiresDirective(targetModule, EnumSet.of(RequiresFlag.EXTRA)));
1742 }
1743 }
1744 }
1745
1746 private void checkCyclicDependencies(JCModuleDecl mod) {
1747 for (JCDirective d : mod.directives) {
1748 JCRequires rd;
1749 if (!d.hasTag(Tag.REQUIRES) || (rd = (JCRequires) d).directive == null)
1750 continue;
1751 Set<ModuleSymbol> nonSyntheticDeps = new HashSet<>();
1752 List<ModuleSymbol> queue = List.of(rd.directive.module);
1753 while (queue.nonEmpty()) {
1754 ModuleSymbol current = queue.head;
1755 queue = queue.tail;
1756 if (!nonSyntheticDeps.add(current))
1757 continue;
1758 current.complete();
1759 if ((current.flags() & Flags.AUTOMATIC_MODULE) != 0)
1760 continue;
1761 Assert.checkNonNull(current.requires, current::toString);
1762 for (RequiresDirective dep : current.requires) {
1763 if (!dep.flags.contains(RequiresFlag.EXTRA))
1764 queue = queue.prepend(dep.module);
1765 }
1766 }
1767 if (nonSyntheticDeps.contains(mod.sym)) {
1768 log.error(rd.moduleName.pos(), Errors.CyclicRequires(rd.directive.module));
1769 }
1770 }
1771 }
1772
1773 private boolean isValidName(CharSequence name) {
1774 return SourceVersion.isName(name, Source.toSourceVersion(source));
1775 }
1776
1777 // DEBUG
1778 private String toString(ModuleSymbol msym) {
1779 return msym.name + "["
1780 + "kind:" + msym.kind + ";"
1781 + "locn:" + toString(msym.sourceLocation) + "," + toString(msym.classLocation) + ";"
1782 + "info:" + toString(msym.module_info.sourcefile) + ","
1783 + toString(msym.module_info.classfile) + ","
1784 + msym.module_info.completer
1785 + "]";
1786 }
1787
1788 // DEBUG
1789 String toString(Location locn) {
1790 return (locn == null) ? "--" : locn.getName();
1791 }
1792
1793 // DEBUG
1794 String toString(JavaFileObject fo) {
1795 return (fo == null) ? "--" : fo.getName();
1796 }
1797
1798 public void newRound() {
1799 allModules = null;
1800 rootModules = null;
1801 defaultModule = null;
1802 warnedMissing.clear();
1803 }
1804
1805 public interface PackageNameFinder {
1806 public Name findPackageNameOf(JavaFileObject jfo);
1807 }
1808 }