1 /*
2 * Copyright (c) 2014, 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 java.lang.reflect;
27
28 import java.io.IOException;
29 import java.io.InputStream;
30 import java.lang.annotation.Annotation;
31 import java.lang.module.Configuration;
32 import java.lang.module.ModuleReference;
33 import java.lang.module.ModuleDescriptor;
34 import java.lang.module.ModuleDescriptor.Exports;
35 import java.lang.module.ModuleDescriptor.Opens;
36 import java.lang.module.ModuleDescriptor.Version;
37 import java.lang.module.ResolvedModule;
38 import java.net.URI;
39 import java.net.URL;
40 import java.security.AccessController;
41 import java.security.PrivilegedAction;
42 import java.util.Collections;
43 import java.util.HashMap;
44 import java.util.HashSet;
45 import java.util.Map;
46 import java.util.Objects;
47 import java.util.Optional;
48 import java.util.Set;
49 import java.util.concurrent.ConcurrentHashMap;
50 import java.util.function.Function;
51 import java.util.stream.Stream;
52
53 import jdk.internal.loader.BuiltinClassLoader;
54 import jdk.internal.loader.BootLoader;
55 import jdk.internal.loader.ResourceHelper;
56 import jdk.internal.misc.JavaLangAccess;
57 import jdk.internal.misc.JavaLangReflectModuleAccess;
58 import jdk.internal.misc.SharedSecrets;
59 import jdk.internal.module.ServicesCatalog;
60 import jdk.internal.org.objectweb.asm.AnnotationVisitor;
61 import jdk.internal.org.objectweb.asm.Attribute;
62 import jdk.internal.org.objectweb.asm.ClassReader;
63 import jdk.internal.org.objectweb.asm.ClassVisitor;
64 import jdk.internal.org.objectweb.asm.ClassWriter;
65 import jdk.internal.org.objectweb.asm.Opcodes;
66 import jdk.internal.reflect.CallerSensitive;
67 import jdk.internal.reflect.Reflection;
68 import sun.security.util.SecurityConstants;
69
70 /**
71 * Represents a run-time module, either {@link #isNamed() named} or unnamed.
72 *
73 * <p> Named modules have a {@link #getName() name} and are constructed by the
74 * Java Virtual Machine when a graph of modules is defined to the Java virtual
75 * machine to create a module {@link Layer Layer}. </p>
76 *
77 * <p> An unnamed module does not have a name. There is an unnamed module
78 * per {@link ClassLoader ClassLoader} that is obtained by invoking the class
79 * loader's {@link ClassLoader#getUnnamedModule() getUnnamedModule} method. The
80 * {@link Class#getModule() getModule} method of all types defined by a class
81 * loader that are not in a named module return the class loader's unnamed
82 * module. </p>
83 *
84 * <p> The package names that are parameters or returned by methods defined in
85 * this class are the fully-qualified names of the packages as defined in
86 * section 6.5.3 of <cite>The Java™ Language Specification </cite>, for
87 * example, {@code "java.lang"}. </p>
88 *
89 * <p> Unless otherwise specified, passing a {@code null} argument to a method
90 * in this class causes a {@link NullPointerException NullPointerException} to
91 * be thrown. </p>
92 *
93 * @since 9
94 * @see java.lang.Class#getModule
95 */
96
97 public final class Module implements AnnotatedElement {
98
99 // the layer that contains this module, can be null
100 private final Layer layer;
101
102 // module name and loader, these fields are read by VM
103 private final String name;
104 private final ClassLoader loader;
105
106 // the module descriptor
107 private final ModuleDescriptor descriptor;
108
109
110 /**
111 * Creates a new named Module. The resulting Module will be defined to the
112 * VM but will not read any other modules, will not have any exports setup
113 * and will not be registered in the service catalog.
114 */
115 private Module(Layer layer,
116 ClassLoader loader,
117 ModuleDescriptor descriptor,
118 URI uri)
119 {
120 this.layer = layer;
121 this.name = descriptor.name();
122 this.loader = loader;
123 this.descriptor = descriptor;
124
125 // define module to VM
126
127 boolean isOpen = descriptor.isOpen();
128 Version version = descriptor.version().orElse(null);
129 String vs = Objects.toString(version, null);
130 String loc = Objects.toString(uri, null);
131 String[] packages = descriptor.packages().toArray(new String[0]);
132 defineModule0(this, isOpen, vs, loc, packages);
133 }
134
135
136 /**
137 * Create the unnamed Module for the given ClassLoader.
138 *
139 * @see ClassLoader#getUnnamedModule
140 */
141 private Module(ClassLoader loader) {
142 this.layer = null;
143 this.name = null;
144 this.loader = loader;
145 this.descriptor = null;
146 }
147
148
149 /**
150 * Creates a named module but without defining the module to the VM.
151 *
152 * @apiNote This constructor is for VM white-box testing.
153 */
154 Module(ClassLoader loader, ModuleDescriptor descriptor) {
155 this.layer = null;
156 this.name = descriptor.name();
157 this.loader = loader;
158 this.descriptor = descriptor;
159 }
160
161
162
163 /**
164 * Returns {@code true} if this module is a named module.
165 *
166 * @return {@code true} if this is a named module
167 *
168 * @see ClassLoader#getUnnamedModule()
169 */
170 public boolean isNamed() {
171 return name != null;
172 }
173
174 /**
175 * Returns the module name or {@code null} if this module is an unnamed
176 * module.
177 *
178 * @return The module name
179 */
180 public String getName() {
181 return name;
182 }
183
184 /**
185 * Returns the {@code ClassLoader} for this module.
186 *
187 * <p> If there is a security manager then its {@code checkPermission}
188 * method if first called with a {@code RuntimePermission("getClassLoader")}
189 * permission to check that the caller is allowed to get access to the
190 * class loader. </p>
191 *
192 * @return The class loader for this module
193 *
194 * @throws SecurityException
195 * If denied by the security manager
196 */
197 public ClassLoader getClassLoader() {
198 SecurityManager sm = System.getSecurityManager();
199 if (sm != null) {
200 sm.checkPermission(SecurityConstants.GET_CLASSLOADER_PERMISSION);
201 }
202 return loader;
203 }
204
205 /**
206 * Returns the module descriptor for this module or {@code null} if this
207 * module is an unnamed module.
208 *
209 * @return The module descriptor for this module
210 */
211 public ModuleDescriptor getDescriptor() {
212 return descriptor;
213 }
214
215 /**
216 * Returns the layer that contains this module or {@code null} if this
217 * module is not in a layer.
218 *
219 * A module {@code Layer} contains named modules and therefore this
220 * method always returns {@code null} when invoked on an unnamed module.
221 *
222 * <p> <a href="Proxy.html#dynamicmodule">Dynamic modules</a> are named
223 * modules that are generated at runtime. A dynamic module may or may
224 * not be in a module Layer. </p>
225 *
226 * @return The layer that contains this module
227 *
228 * @see Proxy
229 */
230 public Layer getLayer() {
231 if (isNamed()) {
232 Layer layer = this.layer;
233 if (layer != null)
234 return layer;
235
236 // special-case java.base as it is created before the boot Layer
237 if (loader == null && name.equals("java.base")) {
238 return SharedSecrets.getJavaLangAccess().getBootLayer();
239 }
240 }
241
242 return null;
243 }
244
245
246 // --
247
248 // special Module to mean "all unnamed modules"
249 private static final Module ALL_UNNAMED_MODULE = new Module(null);
250
251 // special Module to mean "everyone"
252 private static final Module EVERYONE_MODULE = new Module(null);
253
254 // set contains EVERYONE_MODULE, used when a package is opened or
255 // exported unconditionally
256 private static final Set<Module> EVERYONE_SET = Set.of(EVERYONE_MODULE);
257
258
259 // -- readability --
260
261 // the modules that this module reads
262 private volatile Set<Module> reads;
263
264 // additional module (2nd key) that some module (1st key) reflectively reads
265 private static final WeakPairMap<Module, Module, Boolean> reflectivelyReads
266 = new WeakPairMap<>();
267
268
269 /**
270 * Indicates if this module reads the given module. This method returns
271 * {@code true} if invoked to test if this module reads itself. It also
272 * returns {@code true} if invoked on an unnamed module (as unnamed
273 * modules read all modules).
274 *
275 * @param other
276 * The other module
277 *
278 * @return {@code true} if this module reads {@code other}
279 *
280 * @see #addReads(Module)
281 */
282 public boolean canRead(Module other) {
283 Objects.requireNonNull(other);
284
285 // an unnamed module reads all modules
286 if (!this.isNamed())
287 return true;
288
289 // all modules read themselves
290 if (other == this)
291 return true;
292
293 // check if this module reads other
294 if (other.isNamed()) {
295 Set<Module> reads = this.reads; // volatile read
296 if (reads != null && reads.contains(other))
297 return true;
298 }
299
300 // check if this module reads the other module reflectively
301 if (reflectivelyReads.containsKeyPair(this, other))
302 return true;
303
304 // if other is an unnamed module then check if this module reads
305 // all unnamed modules
306 if (!other.isNamed()
307 && reflectivelyReads.containsKeyPair(this, ALL_UNNAMED_MODULE))
308 return true;
309
310 return false;
311 }
312
313 /**
314 * If the caller's module is this module then update this module to read
315 * the given module.
316 *
317 * This method is a no-op if {@code other} is this module (all modules read
318 * themselves), this module is an unnamed module (as unnamed modules read
319 * all modules), or this module already reads {@code other}.
320 *
321 * @implNote <em>Read edges</em> added by this method are <em>weak</em> and
322 * do not prevent {@code other} from being GC'ed when this module is
323 * strongly reachable.
324 *
325 * @param other
326 * The other module
327 *
328 * @return this module
329 *
330 * @throws IllegalStateException
331 * If this is a named module and the caller is not this module
332 *
333 * @see #canRead
334 */
335 @CallerSensitive
336 public Module addReads(Module other) {
337 Objects.requireNonNull(other);
338 if (this.isNamed()) {
339 Module caller = Reflection.getCallerClass().getModule();
340 if (caller != this) {
341 throw new IllegalStateException(caller + " != " + this);
342 }
343 implAddReads(other, true);
344 }
345 return this;
346 }
347
348 /**
349 * Updates this module to read another module.
350 *
351 * @apiNote This method is for Proxy use and white-box testing.
352 */
353 void implAddReads(Module other) {
354 implAddReads(other, true);
355 }
356
357 /**
358 * Updates this module to read another module without notifying the VM.
359 *
360 * @apiNote This method is for VM white-box testing.
361 */
362 void implAddReadsNoSync(Module other) {
363 implAddReads(other, false);
364 }
365
366 /**
367 * Makes the given {@code Module} readable to this module.
368 *
369 * If {@code syncVM} is {@code true} then the VM is notified.
370 */
371 private void implAddReads(Module other, boolean syncVM) {
372 Objects.requireNonNull(other);
373
374 // nothing to do
375 if (other == this || !this.isNamed())
376 return;
377
378 // check if we already read this module
379 Set<Module> reads = this.reads;
380 if (reads != null && reads.contains(other))
381 return;
382
383 // update VM first, just in case it fails
384 if (syncVM) {
385 if (other == ALL_UNNAMED_MODULE) {
386 addReads0(this, null);
387 } else {
388 addReads0(this, other);
389 }
390 }
391
392 // add reflective read
393 reflectivelyReads.putIfAbsent(this, other, Boolean.TRUE);
394 }
395
396
397 // -- exported and open packages --
398
399 // the packages are open to other modules, can be null
400 // if the value contains EVERYONE_MODULE then the package is open to all
401 private volatile Map<String, Set<Module>> openPackages;
402
403 // the packages that are exported, can be null
404 // if the value contains EVERYONE_MODULE then the package is exported to all
405 private volatile Map<String, Set<Module>> exportedPackages;
406
407 // additional exports or opens added at run-time
408 // this module (1st key), other module (2nd key)
409 // (package name, open?) (value)
410 private static final WeakPairMap<Module, Module, Map<String, Boolean>>
411 reflectivelyExports = new WeakPairMap<>();
412
413
414 /**
415 * Returns {@code true} if this module exports the given package to at
416 * least the given module.
417 *
418 * <p> This method returns {@code true} if invoked to test if a package in
419 * this module is exported to itself. It always returns {@code true} when
420 * invoked on an unnamed module. A package that is {@link #isOpen open} to
421 * the given module is considered exported to that module at run-time and
422 * so this method returns {@code true} if the package is open to the given
423 * module. </p>
424 *
425 * <p> This method does not check if the given module reads this module. </p>
426 *
427 * @param pn
428 * The package name
429 * @param other
430 * The other module
431 *
432 * @return {@code true} if this module exports the package to at least the
433 * given module
434 *
435 * @see ModuleDescriptor#exports()
436 * @see #addExports(String,Module)
437 */
438 public boolean isExported(String pn, Module other) {
439 Objects.requireNonNull(pn);
440 Objects.requireNonNull(other);
441 return implIsExportedOrOpen(pn, other, /*open*/false);
442 }
443
444 /**
445 * Returns {@code true} if this module has <em>opened</em> a package to at
446 * least the given module.
447 *
448 * <p> This method returns {@code true} if invoked to test if a package in
449 * this module is open to itself. It returns {@code true} when invoked on an
450 * {@link ModuleDescriptor#isOpen open} module with a package in the module.
451 * It always returns {@code true} when invoked on an unnamed module. </p>
452 *
453 * <p> This method does not check if the given module reads this module. </p>
454 *
455 * @param pn
456 * The package name
457 * @param other
458 * The other module
459 *
460 * @return {@code true} if this module has <em>opened</em> the package
461 * to at least the given module
462 *
463 * @see ModuleDescriptor#opens()
464 * @see #addOpens(String,Module)
465 * @see AccessibleObject#setAccessible(boolean)
466 * @see java.lang.invoke.MethodHandles#privateLookupIn
467 */
468 public boolean isOpen(String pn, Module other) {
469 Objects.requireNonNull(pn);
470 Objects.requireNonNull(other);
471 return implIsExportedOrOpen(pn, other, /*open*/true);
472 }
473
474 /**
475 * Returns {@code true} if this module exports the given package
476 * unconditionally.
477 *
478 * <p> This method always returns {@code true} when invoked on an unnamed
479 * module. A package that is {@link #isOpen(String) opened} unconditionally
480 * is considered exported unconditionally at run-time and so this method
481 * returns {@code true} if the package is opened unconditionally. </p>
482 *
483 * <p> This method does not check if the given module reads this module. </p>
484 *
485 * @param pn
486 * The package name
487 *
488 * @return {@code true} if this module exports the package unconditionally
489 *
490 * @see ModuleDescriptor#exports()
491 */
492 public boolean isExported(String pn) {
493 Objects.requireNonNull(pn);
494 return implIsExportedOrOpen(pn, EVERYONE_MODULE, /*open*/false);
495 }
496
497 /**
498 * Returns {@code true} if this module has <em>opened</em> a package
499 * unconditionally.
500 *
501 * <p> This method always returns {@code true} when invoked on an unnamed
502 * module. Additionally, it always returns {@code true} when invoked on an
503 * {@link ModuleDescriptor#isOpen open} module with a package in the
504 * module. </p>
505 *
506 * <p> This method does not check if the given module reads this module. </p>
507 *
508 * @param pn
509 * The package name
510 *
511 * @return {@code true} if this module has <em>opened</em> the package
512 * unconditionally
513 *
514 * @see ModuleDescriptor#opens()
515 */
516 public boolean isOpen(String pn) {
517 Objects.requireNonNull(pn);
518 return implIsExportedOrOpen(pn, EVERYONE_MODULE, /*open*/true);
519 }
520
521
522 /**
523 * Returns {@code true} if this module exports or opens the given package
524 * to the given module. If the other module is {@code EVERYONE_MODULE} then
525 * this method tests if the package is exported or opened unconditionally.
526 */
527 private boolean implIsExportedOrOpen(String pn, Module other, boolean open) {
528 // all packages in unnamed modules are open
529 if (!isNamed())
530 return true;
531
532 // all packages are exported/open to self
533 if (other == this && containsPackage(pn))
534 return true;
535
536 // all packages in open modules are open
537 if (descriptor.isOpen())
538 return containsPackage(pn);
539
540 // exported/opened via module declaration/descriptor
541 if (isStaticallyExportedOrOpen(pn, other, open))
542 return true;
543
544 // exported via addExports/addOpens
545 if (isReflectivelyExportedOrOpen(pn, other, open))
546 return true;
547
548 // not exported or open to other
549 return false;
550 }
551
552 /**
553 * Returns {@code true} if this module exports or opens a package to
554 * the given module via its module declaration.
555 */
556 boolean isStaticallyExportedOrOpen(String pn, Module other, boolean open) {
557 // package is open to everyone or <other>
558 Map<String, Set<Module>> openPackages = this.openPackages;
559 if (openPackages != null) {
560 Set<Module> targets = openPackages.get(pn);
561 if (targets != null) {
562 if (targets.contains(EVERYONE_MODULE))
563 return true;
564 if (other != EVERYONE_MODULE && targets.contains(other))
565 return true;
566 }
567 }
568
569 if (!open) {
570 // package is exported to everyone or <other>
571 Map<String, Set<Module>> exportedPackages = this.exportedPackages;
572 if (exportedPackages != null) {
573 Set<Module> targets = exportedPackages.get(pn);
574 if (targets != null) {
575 if (targets.contains(EVERYONE_MODULE))
576 return true;
577 if (other != EVERYONE_MODULE && targets.contains(other))
578 return true;
579 }
580 }
581 }
582
583 return false;
584 }
585
586
587 /**
588 * Returns {@code true} if this module reflectively exports or opens given
589 * package package to the given module.
590 */
591 private boolean isReflectivelyExportedOrOpen(String pn, Module other, boolean open) {
592 // exported or open to all modules
593 Map<String, Boolean> exports = reflectivelyExports.get(this, EVERYONE_MODULE);
594 if (exports != null) {
595 Boolean b = exports.get(pn);
596 if (b != null) {
597 boolean isOpen = b.booleanValue();
598 if (!open || isOpen) return true;
599 }
600 }
601
602 if (other != EVERYONE_MODULE) {
603
604 // exported or open to other
605 exports = reflectivelyExports.get(this, other);
606 if (exports != null) {
607 Boolean b = exports.get(pn);
608 if (b != null) {
609 boolean isOpen = b.booleanValue();
610 if (!open || isOpen) return true;
611 }
612 }
613
614 // other is an unnamed module && exported or open to all unnamed
615 if (!other.isNamed()) {
616 exports = reflectivelyExports.get(this, ALL_UNNAMED_MODULE);
617 if (exports != null) {
618 Boolean b = exports.get(pn);
619 if (b != null) {
620 boolean isOpen = b.booleanValue();
621 if (!open || isOpen) return true;
622 }
623 }
624 }
625
626 }
627
628 return false;
629 }
630
631
632 /**
633 * If the caller's module is this module then update this module to export
634 * the given package to the given module.
635 *
636 * <p> This method has no effect if the package is already exported (or
637 * <em>open</em>) to the given module. It also has no effect if
638 * invoked on an {@link ModuleDescriptor#isOpen open} module. </p>
639 *
640 * @apiNote As specified in section 5.4.3 of the <cite>The Java™
641 * Virtual Machine Specification </cite>, if an attempt to resolve a
642 * symbolic reference fails because of a linkage error, then subsequent
643 * attempts to resolve the reference always fail with the same error that
644 * was thrown as a result of the initial resolution attempt.
645 *
646 * @param pn
647 * The package name
648 * @param other
649 * The module
650 *
651 * @return this module
652 *
653 * @throws IllegalArgumentException
654 * If {@code pn} is {@code null}, or this is a named module and the
655 * package {@code pn} is not a package in this module
656 * @throws IllegalStateException
657 * If this is a named module and the caller is not this module
658 *
659 * @jvms 5.4.3 Resolution
660 * @see #isExported(String,Module)
661 */
662 @CallerSensitive
663 public Module addExports(String pn, Module other) {
664 if (pn == null)
665 throw new IllegalArgumentException("package is null");
666 Objects.requireNonNull(other);
667
668 if (isNamed() && !descriptor.isOpen()) {
669 Module caller = Reflection.getCallerClass().getModule();
670 if (caller != this) {
671 throw new IllegalStateException(caller + " != " + this);
672 }
673 implAddExportsOrOpens(pn, other, /*open*/false, /*syncVM*/true);
674 }
675
676 return this;
677 }
678
679 /**
680 * If this module has <em>opened</em> a package to at least the caller
681 * module then update this module to open the package to the given module.
682 * Opening a package with this method allows all types in the package,
683 * and all their members, not just public types and their public members,
684 * to be reflected on by the given module when using APIs that support
685 * private access or a way to bypass or suppress default Java language
686 * access control checks.
687 *
688 * <p> This method has no effect if the package is already <em>open</em>
689 * to the given module. It also has no effect if invoked on an {@link
690 * ModuleDescriptor#isOpen open} module. </p>
691 *
692 * @param pn
693 * The package name
694 * @param other
695 * The module
696 *
697 * @return this module
698 *
699 * @throws IllegalArgumentException
700 * If {@code pn} is {@code null}, or this is a named module and the
701 * package {@code pn} is not a package in this module
702 * @throws IllegalStateException
703 * If this is a named module and this module has not opened the
704 * package to at least the caller
705 *
706 * @see #isOpen(String,Module)
707 * @see AccessibleObject#setAccessible(boolean)
708 * @see java.lang.invoke.MethodHandles#privateLookupIn
709 */
710 @CallerSensitive
711 public Module addOpens(String pn, Module other) {
712 if (pn == null)
713 throw new IllegalArgumentException("package is null");
714 Objects.requireNonNull(other);
715
716 if (isNamed() && !descriptor.isOpen()) {
717 Module caller = Reflection.getCallerClass().getModule();
718 if (caller != this && !isOpen(pn, caller))
719 throw new IllegalStateException(pn + " is not open to " + caller);
720 implAddExportsOrOpens(pn, other, /*open*/true, /*syncVM*/true);
721 }
722
723 return this;
724 }
725
726
727 /**
728 * Updates the exports so that package {@code pn} is exported to module
729 * {@code other} but without notifying the VM.
730 *
731 * @apiNote This method is for VM white-box testing.
732 */
733 void implAddExportsNoSync(String pn, Module other) {
734 if (other == null)
735 other = EVERYONE_MODULE;
736 implAddExportsOrOpens(pn.replace('/', '.'), other, false, false);
737 }
738
739 /**
740 * Updates the exports so that package {@code pn} is exported to module
741 * {@code other}.
742 *
743 * @apiNote This method is for white-box testing.
744 */
745 void implAddExports(String pn, Module other) {
746 implAddExportsOrOpens(pn, other, false, true);
747 }
748
749 /**
750 * Updates the module to open package {@code pn} to module {@code other}.
751 *
752 * @apiNote This method is for white-box tests and jtreg
753 */
754 void implAddOpens(String pn, Module other) {
755 implAddExportsOrOpens(pn, other, true, true);
756 }
757
758 /**
759 * Updates a module to export or open a module to another module.
760 *
761 * If {@code syncVM} is {@code true} then the VM is notified.
762 */
763 private void implAddExportsOrOpens(String pn,
764 Module other,
765 boolean open,
766 boolean syncVM) {
767 Objects.requireNonNull(other);
768 Objects.requireNonNull(pn);
769
770 // all packages are open in unnamed and open modules
771 if (!isNamed() || descriptor.isOpen())
772 return;
773
774 // nothing to do if already exported/open to other
775 if (implIsExportedOrOpen(pn, other, open))
776 return;
777
778 // can only export a package in the module
779 if (!containsPackage(pn)) {
780 throw new IllegalArgumentException("package " + pn
781 + " not in contents");
782 }
783
784 // update VM first, just in case it fails
785 if (syncVM) {
786 if (other == EVERYONE_MODULE) {
787 addExportsToAll0(this, pn);
788 } else if (other == ALL_UNNAMED_MODULE) {
789 addExportsToAllUnnamed0(this, pn);
790 } else {
791 addExports0(this, pn, other);
792 }
793 }
794
795 // add package name to reflectivelyExports if absent
796 Map<String, Boolean> map = reflectivelyExports
797 .computeIfAbsent(this, other,
798 (m1, m2) -> new ConcurrentHashMap<>());
799
800 if (open) {
801 map.put(pn, Boolean.TRUE); // may need to promote from FALSE to TRUE
802 } else {
803 map.putIfAbsent(pn, Boolean.FALSE);
804 }
805 }
806
807
808 // -- services --
809
810 // additional service type (2nd key) that some module (1st key) uses
811 private static final WeakPairMap<Module, Class<?>, Boolean> reflectivelyUses
812 = new WeakPairMap<>();
813
814 /**
815 * If the caller's module is this module then update this module to add a
816 * service dependence on the given service type. This method is intended
817 * for use by frameworks that invoke {@link java.util.ServiceLoader
818 * ServiceLoader} on behalf of other modules or where the framework is
819 * passed a reference to the service type by other code. This method is
820 * a no-op when invoked on an unnamed module or an automatic module.
821 *
822 * <p> This method does not cause {@link
823 * Configuration#resolveRequiresAndUses resolveRequiresAndUses} to be
824 * re-run. </p>
825 *
826 * @param service
827 * The service type
828 *
829 * @return this module
830 *
831 * @throws IllegalStateException
832 * If this is a named module and the caller is not this module
833 *
834 * @see #canUse(Class)
835 * @see ModuleDescriptor#uses()
836 */
837 @CallerSensitive
838 public Module addUses(Class<?> service) {
839 Objects.requireNonNull(service);
840
841 if (isNamed() && !descriptor.isAutomatic()) {
842 Module caller = Reflection.getCallerClass().getModule();
843 if (caller != this) {
844 throw new IllegalStateException(caller + " != " + this);
845 }
846 implAddUses(service);
847 }
848
849 return this;
850 }
851
852 /**
853 * Update this module to add a service dependence on the given service
854 * type.
855 */
856 void implAddUses(Class<?> service) {
857 if (!canUse(service)) {
858 reflectivelyUses.putIfAbsent(this, service, Boolean.TRUE);
859 }
860 }
861
862
863 /**
864 * Indicates if this module has a service dependence on the given service
865 * type. This method always returns {@code true} when invoked on an unnamed
866 * module or an automatic module.
867 *
868 * @param service
869 * The service type
870 *
871 * @return {@code true} if this module uses service type {@code st}
872 *
873 * @see #addUses(Class)
874 */
875 public boolean canUse(Class<?> service) {
876 Objects.requireNonNull(service);
877
878 if (!isNamed())
879 return true;
880
881 if (descriptor.isAutomatic())
882 return true;
883
884 // uses was declared
885 if (descriptor.uses().contains(service.getName()))
886 return true;
887
888 // uses added via addUses
889 return reflectivelyUses.containsKeyPair(this, service);
890 }
891
892
893
894 // -- packages --
895
896 // Additional packages that are added to the module at run-time.
897 // The field is volatile as it may be replaced at run-time
898 private volatile Set<String> extraPackages;
899
900 private boolean containsPackage(String pn) {
901 if (descriptor.packages().contains(pn))
902 return true;
903 Set<String> extraPackages = this.extraPackages;
904 if (extraPackages != null && extraPackages.contains(pn))
905 return true;
906 return false;
907 }
908
909
910 /**
911 * Returns an array of the package names of the packages in this module.
912 *
913 * <p> For named modules, the returned array contains an element for each
914 * package in the module. It may contain elements corresponding to packages
915 * added to the module, <a href="Proxy.html#dynamicmodule">dynamic modules</a>
916 * for example, after it was loaded.
917 *
918 * <p> For unnamed modules, this method is the equivalent of invoking the
919 * {@link ClassLoader#getDefinedPackages() getDefinedPackages} method of
920 * this module's class loader and returning the array of package names. </p>
921 *
922 * <p> A package name appears at most once in the returned array. </p>
923 *
924 * @apiNote This method returns an array rather than a {@code Set} for
925 * consistency with other {@code java.lang.reflect} types.
926 *
927 * @return an array of the package names of the packages in this module
928 */
929 public String[] getPackages() {
930 if (isNamed()) {
931
932 Set<String> packages = descriptor.packages();
933 Set<String> extraPackages = this.extraPackages;
934 if (extraPackages == null) {
935 return packages.toArray(new String[0]);
936 } else {
937 return Stream.concat(packages.stream(),
938 extraPackages.stream())
939 .toArray(String[]::new);
940 }
941
942 } else {
943 // unnamed module
944 Stream<Package> packages;
945 if (loader == null) {
946 packages = BootLoader.packages();
947 } else {
948 packages = SharedSecrets.getJavaLangAccess().packages(loader);
949 }
950 return packages.map(Package::getName).toArray(String[]::new);
951 }
952 }
953
954 /**
955 * Add a package to this module.
956 *
957 * @apiNote This method is for Proxy use.
958 *
959 * @apiNote This is an expensive operation, not expected to be used often.
960 * At this time then it does not validate that the package name is a
961 * valid java identifier.
962 */
963 void addPackage(String pn) {
964 implAddPackage(pn, true);
965 }
966
967 /**
968 * Add a package to this module without notifying the VM.
969 *
970 * @apiNote This method is VM white-box testing.
971 */
972 void implAddPackageNoSync(String pn) {
973 implAddPackage(pn.replace('/', '.'), false);
974 }
975
976 /**
977 * Add a package to this module.
978 *
979 * If {@code syncVM} is {@code true} then the VM is notified.
980 */
981 private void implAddPackage(String pn, boolean syncVM) {
982 if (!isNamed())
983 throw new InternalError("adding package to unnamed module?");
984 if (descriptor.isOpen())
985 throw new InternalError("adding package to open module?");
986 if (pn.isEmpty())
987 throw new InternalError("adding <unnamed> package to module?");
988
989 if (descriptor.packages().contains(pn)) {
990 // already in module
991 return;
992 }
993
994 Set<String> extraPackages = this.extraPackages;
995 if (extraPackages != null && extraPackages.contains(pn)) {
996 // already added
997 return;
998 }
999 synchronized (this) {
1000 // recheck under lock
1001 extraPackages = this.extraPackages;
1002 if (extraPackages != null) {
1003 if (extraPackages.contains(pn)) {
1004 // already added
1005 return;
1006 }
1007
1008 // copy the set
1009 extraPackages = new HashSet<>(extraPackages);
1010 extraPackages.add(pn);
1011 } else {
1012 extraPackages = Collections.singleton(pn);
1013 }
1014
1015 // update VM first, just in case it fails
1016 if (syncVM)
1017 addPackage0(this, pn);
1018
1019 // replace with new set
1020 this.extraPackages = extraPackages; // volatile write
1021 }
1022 }
1023
1024
1025 // -- creating Module objects --
1026
1027 /**
1028 * Defines all module in a configuration to the runtime.
1029 *
1030 * @return a map of module name to runtime {@code Module}
1031 *
1032 * @throws IllegalArgumentException
1033 * If defining any of the modules to the VM fails
1034 */
1035 static Map<String, Module> defineModules(Configuration cf,
1036 Function<String, ClassLoader> clf,
1037 Layer layer)
1038 {
1039 Map<String, Module> nameToModule = new HashMap<>();
1040 Map<String, ClassLoader> moduleToLoader = new HashMap<>();
1041
1042 boolean isBootLayer = (Layer.boot() == null);
1043 Set<ClassLoader> loaders = new HashSet<>();
1044
1045 // map each module to a class loader
1046 for (ResolvedModule resolvedModule : cf.modules()) {
1047 String name = resolvedModule.name();
1048 ClassLoader loader = clf.apply(name);
1049 if (loader != null) {
1050 moduleToLoader.put(name, loader);
1051 loaders.add(loader);
1052 } else if (!isBootLayer) {
1053 throw new IllegalArgumentException("loader can't be 'null'");
1054 }
1055 }
1056
1057 // define each module in the configuration to the VM
1058 for (ResolvedModule resolvedModule : cf.modules()) {
1059 ModuleReference mref = resolvedModule.reference();
1060 ModuleDescriptor descriptor = mref.descriptor();
1061 String name = descriptor.name();
1062 URI uri = mref.location().orElse(null);
1063 ClassLoader loader = moduleToLoader.get(resolvedModule.name());
1064 Module m;
1065 if (loader == null && isBootLayer && name.equals("java.base")) {
1066 // java.base is already defined to the VM
1067 m = Object.class.getModule();
1068 } else {
1069 m = new Module(layer, loader, descriptor, uri);
1070 }
1071 nameToModule.put(name, m);
1072 moduleToLoader.put(name, loader);
1073 }
1074
1075 // setup readability and exports
1076 for (ResolvedModule resolvedModule : cf.modules()) {
1077 ModuleReference mref = resolvedModule.reference();
1078 ModuleDescriptor descriptor = mref.descriptor();
1079
1080 String mn = descriptor.name();
1081 Module m = nameToModule.get(mn);
1082 assert m != null;
1083
1084 // reads
1085 Set<Module> reads = new HashSet<>();
1086 for (ResolvedModule other : resolvedModule.reads()) {
1087 Module m2 = null;
1088 if (other.configuration() == cf) {
1089 String dn = other.reference().descriptor().name();
1090 m2 = nameToModule.get(dn);
1091 } else {
1092 for (Layer parent: layer.parents()) {
1093 m2 = findModule(parent, other);
1094 if (m2 != null)
1095 break;
1096 }
1097 }
1098 assert m2 != null;
1099
1100 reads.add(m2);
1101
1102 // update VM view
1103 addReads0(m, m2);
1104 }
1105 m.reads = reads;
1106
1107 // automatic modules read all unnamed modules
1108 if (descriptor.isAutomatic()) {
1109 m.implAddReads(ALL_UNNAMED_MODULE, true);
1110 }
1111
1112 // exports and opens
1113 initExportsAndOpens(descriptor, nameToModule, m);
1114 }
1115
1116 // register the modules in the boot layer
1117 if (isBootLayer) {
1118 for (ResolvedModule resolvedModule : cf.modules()) {
1119 ModuleReference mref = resolvedModule.reference();
1120 ModuleDescriptor descriptor = mref.descriptor();
1121 if (!descriptor.provides().isEmpty()) {
1122 String name = descriptor.name();
1123 Module m = nameToModule.get(name);
1124 ClassLoader loader = moduleToLoader.get(name);
1125 ServicesCatalog catalog;
1126 if (loader == null) {
1127 catalog = BootLoader.getServicesCatalog();
1128 } else {
1129 catalog = ServicesCatalog.getServicesCatalog(loader);
1130 }
1131 catalog.register(m);
1132 }
1133 }
1134 }
1135
1136 // record that there is a layer with modules defined to the class loader
1137 for (ClassLoader loader : loaders) {
1138 layer.bindToLoader(loader);
1139 }
1140
1141 return nameToModule;
1142 }
1143
1144
1145 /**
1146 * Find the runtime Module corresponding to the given ResolvedModule
1147 * in the given parent layer (or its parents).
1148 */
1149 private static Module findModule(Layer parent, ResolvedModule resolvedModule) {
1150 Configuration cf = resolvedModule.configuration();
1151 String dn = resolvedModule.name();
1152 return parent.layers()
1153 .filter(l -> l.configuration() == cf)
1154 .findAny()
1155 .map(layer -> {
1156 Optional<Module> om = layer.findModule(dn);
1157 assert om.isPresent() : dn + " not found in layer";
1158 Module m = om.get();
1159 assert m.getLayer() == layer : m + " not in expected layer";
1160 return m;
1161 })
1162 .orElse(null);
1163 }
1164
1165 /**
1166 * Initialize the maps of exported and open packages for module m.
1167 */
1168 private static void initExportsAndOpens(ModuleDescriptor descriptor,
1169 Map<String, Module> nameToModule,
1170 Module m)
1171 {
1172 // The VM doesn't know about open modules so need to export all packages
1173 if (descriptor.isOpen()) {
1174 assert descriptor.opens().isEmpty();
1175 for (String source : descriptor.packages()) {
1176 addExportsToAll0(m, source);
1177 }
1178 return;
1179 }
1180
1181 Map<String, Set<Module>> openPackages = new HashMap<>();
1182 Map<String, Set<Module>> exportedPackages = new HashMap<>();
1183
1184 // process the open packages first
1185 for (Opens opens : descriptor.opens()) {
1186 String source = opens.source();
1187
1188 if (opens.isQualified()) {
1189 // qualified opens
1190 Set<Module> targets = new HashSet<>();
1191 for (String target : opens.targets()) {
1192 // only open to modules that are in this configuration
1193 Module m2 = nameToModule.get(target);
1194 if (m2 != null) {
1195 addExports0(m, source, m2);
1196 targets.add(m2);
1197 }
1198 }
1199 if (!targets.isEmpty()) {
1200 openPackages.put(source, targets);
1201 }
1202 } else {
1203 // unqualified opens
1204 addExportsToAll0(m, source);
1205 openPackages.put(source, EVERYONE_SET);
1206 }
1207 }
1208
1209 // next the exports, skipping exports when the package is open
1210 for (Exports exports : descriptor.exports()) {
1211 String source = exports.source();
1212
1213 // skip export if package is already open to everyone
1214 Set<Module> openToTargets = openPackages.get(source);
1215 if (openToTargets != null && openToTargets.contains(EVERYONE_MODULE))
1216 continue;
1217
1218 if (exports.isQualified()) {
1219 // qualified exports
1220 Set<Module> targets = new HashSet<>();
1221 for (String target : exports.targets()) {
1222 // only export to modules that are in this configuration
1223 Module m2 = nameToModule.get(target);
1224 if (m2 != null) {
1225 // skip qualified export if already open to m2
1226 if (openToTargets == null || !openToTargets.contains(m2)) {
1227 addExports0(m, source, m2);
1228 targets.add(m2);
1229 }
1230 }
1231 }
1232 if (!targets.isEmpty()) {
1233 exportedPackages.put(source, targets);
1234 }
1235
1236 } else {
1237 // unqualified exports
1238 addExportsToAll0(m, source);
1239 exportedPackages.put(source, EVERYONE_SET);
1240 }
1241 }
1242
1243 if (!openPackages.isEmpty())
1244 m.openPackages = openPackages;
1245 if (!exportedPackages.isEmpty())
1246 m.exportedPackages = exportedPackages;
1247 }
1248
1249
1250 // -- annotations --
1251
1252 /**
1253 * {@inheritDoc}
1254 * This method returns {@code null} when invoked on an unnamed module.
1255 */
1256 @Override
1257 public <T extends Annotation> T getAnnotation(Class<T> annotationClass) {
1258 return moduleInfoClass().getDeclaredAnnotation(annotationClass);
1259 }
1260
1261 /**
1262 * {@inheritDoc}
1263 * This method returns an empty array when invoked on an unnamed module.
1264 */
1265 @Override
1266 public Annotation[] getAnnotations() {
1267 return moduleInfoClass().getAnnotations();
1268 }
1269
1270 /**
1271 * {@inheritDoc}
1272 * This method returns an empty array when invoked on an unnamed module.
1273 */
1274 @Override
1275 public Annotation[] getDeclaredAnnotations() {
1276 return moduleInfoClass().getDeclaredAnnotations();
1277 }
1278
1279 // cached class file with annotations
1280 private volatile Class<?> moduleInfoClass;
1281
1282 private Class<?> moduleInfoClass() {
1283 Class<?> clazz = this.moduleInfoClass;
1284 if (clazz != null)
1285 return clazz;
1286
1287 synchronized (this) {
1288 clazz = this.moduleInfoClass;
1289 if (clazz == null) {
1290 if (isNamed()) {
1291 PrivilegedAction<Class<?>> pa = this::loadModuleInfoClass;
1292 clazz = AccessController.doPrivileged(pa);
1293 }
1294 if (clazz == null) {
1295 class DummyModuleInfo { }
1296 clazz = DummyModuleInfo.class;
1297 }
1298 this.moduleInfoClass = clazz;
1299 }
1300 return clazz;
1301 }
1302 }
1303
1304 private Class<?> loadModuleInfoClass() {
1305 Class<?> clazz = null;
1306 try (InputStream in = getResourceAsStream("module-info.class")) {
1307 if (in != null)
1308 clazz = loadModuleInfoClass(in);
1309 } catch (Exception ignore) { }
1310 return clazz;
1311 }
1312
1313 /**
1314 * Loads module-info.class as a package-private interface in a class loader
1315 * that is a child of this module's class loader.
1316 */
1317 private Class<?> loadModuleInfoClass(InputStream in) throws IOException {
1318 final String MODULE_INFO = "module-info";
1319
1320 ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS
1321 + ClassWriter.COMPUTE_FRAMES);
1322
1323 ClassVisitor cv = new ClassVisitor(Opcodes.ASM5, cw) {
1324 @Override
1325 public void visit(int version,
1326 int access,
1327 String name,
1328 String signature,
1329 String superName,
1330 String[] interfaces) {
1331 cw.visit(version,
1332 Opcodes.ACC_INTERFACE
1333 + Opcodes.ACC_ABSTRACT
1334 + Opcodes.ACC_SYNTHETIC,
1335 MODULE_INFO,
1336 null,
1337 "java/lang/Object",
1338 null);
1339 }
1340 @Override
1341 public AnnotationVisitor visitAnnotation(String desc, boolean visible) {
1342 // keep annotations
1343 return super.visitAnnotation(desc, visible);
1344 }
1345 @Override
1346 public void visitAttribute(Attribute attr) {
1347 // drop non-annotation attributes
1348 }
1349 };
1350
1351 ClassReader cr = new ClassReader(in);
1352 cr.accept(cv, 0);
1353 byte[] bytes = cw.toByteArray();
1354
1355 ClassLoader cl = new ClassLoader(loader) {
1356 @Override
1357 protected Class<?> findClass(String cn)throws ClassNotFoundException {
1358 if (cn.equals(MODULE_INFO)) {
1359 return super.defineClass(cn, bytes, 0, bytes.length);
1360 } else {
1361 throw new ClassNotFoundException(cn);
1362 }
1363 }
1364 };
1365
1366 try {
1367 return cl.loadClass(MODULE_INFO);
1368 } catch (ClassNotFoundException e) {
1369 throw new InternalError(e);
1370 }
1371 }
1372
1373
1374 // -- misc --
1375
1376
1377 /**
1378 * Returns an input stream for reading a resource in this module. The
1379 * {@code name} parameter is a {@code '/'}-separated path name that
1380 * identifies the resource.
1381 *
1382 * <p> A resource in a named modules may be <em>encapsulated</em> so that
1383 * it cannot be located by code in other modules. Whether a resource can be
1384 * located or not is determined as follows:
1385 *
1386 * <ul>
1387 * <li> The <em>package name</em> of the resource is derived from the
1388 * subsequence of characters that precedes the last {@code '/'} and then
1389 * replacing each {@code '/'} character in the subsequence with
1390 * {@code '.'}. For example, the package name derived for a resource
1391 * named "{@code a/b/c/foo.properties}" is "{@code a.b.c}". </li>
1392 *
1393 * <li> If the package name is a package in the module then the package
1394 * must be {@link #isOpen open} the module of the caller of this method.
1395 * If the package is not in the module then the resource is not
1396 * encapsulated. Resources in the unnamed package or "{@code META-INF}",
1397 * for example, are never encapsulated because they can never be
1398 * packages in a named module. </li>
1399 *
1400 * <li> As a special case, resources ending with "{@code .class}" are
1401 * never encapsulated. </li>
1402 * </ul>
1403 *
1404 * <p> This method returns {@code null} if the resource is not in this
1405 * module, the resource is encapsulated and cannot be located by the caller,
1406 * or access to the resource is denied by the security manager.
1407 *
1408 * @param name
1409 * The resource name
1410 *
1411 * @return An input stream for reading the resource or {@code null}
1412 *
1413 * @throws IOException
1414 * If an I/O error occurs
1415 *
1416 * @see java.lang.module.ModuleReader#open(String)
1417 */
1418 @CallerSensitive
1419 public InputStream getResourceAsStream(String name) throws IOException {
1420 Objects.requireNonNull(name);
1421
1422 if (isNamed() && !ResourceHelper.isSimpleResource(name)) {
1423 Module caller = Reflection.getCallerClass().getModule();
1424 if (caller != this && caller != Object.class.getModule()) {
1425 // ignore packages added for proxies via addPackage
1426 Set<String> packages = getDescriptor().packages();
1427 String pn = ResourceHelper.getPackageName(name);
1428 if (packages.contains(pn) && !isOpen(pn, caller)) {
1429 // resource is in package not open to caller
1430 return null;
1431 }
1432 }
1433 }
1434
1435 String mn = this.name;
1436
1437 // special-case built-in class loaders to avoid URL connection
1438 if (loader == null) {
1439 return BootLoader.findResourceAsStream(mn, name);
1440 } else if (loader instanceof BuiltinClassLoader) {
1441 return ((BuiltinClassLoader) loader).findResourceAsStream(mn, name);
1442 }
1443
1444 // locate resource in module
1445 JavaLangAccess jla = SharedSecrets.getJavaLangAccess();
1446 URL url = jla.findResource(loader, mn, name);
1447 if (url != null) {
1448 try {
1449 return url.openStream();
1450 } catch (SecurityException e) { }
1451 }
1452
1453 return null;
1454 }
1455
1456 /**
1457 * Returns the string representation of this module. For a named module,
1458 * the representation is the string {@code "module"}, followed by a space,
1459 * and then the module name. For an unnamed module, the representation is
1460 * the string {@code "unnamed module"}, followed by a space, and then an
1461 * implementation specific string that identifies the unnamed module.
1462 *
1463 * @return The string representation of this module
1464 */
1465 @Override
1466 public String toString() {
1467 if (isNamed()) {
1468 return "module " + name;
1469 } else {
1470 String id = Integer.toHexString(System.identityHashCode(this));
1471 return "unnamed module @" + id;
1472 }
1473 }
1474
1475
1476 // -- native methods --
1477
1478 // JVM_DefineModule
1479 private static native void defineModule0(Module module,
1480 boolean isOpen,
1481 String version,
1482 String location,
1483 String[] pns);
1484
1485 // JVM_AddReadsModule
1486 private static native void addReads0(Module from, Module to);
1487
1488 // JVM_AddModuleExports
1489 private static native void addExports0(Module from, String pn, Module to);
1490
1491 // JVM_AddModuleExportsToAll
1492 private static native void addExportsToAll0(Module from, String pn);
1493
1494 // JVM_AddModuleExportsToAllUnnamed
1495 private static native void addExportsToAllUnnamed0(Module from, String pn);
1496
1497 // JVM_AddModulePackage
1498 private static native void addPackage0(Module m, String pn);
1499
1500 /**
1501 * Register shared secret to provide access to package-private methods
1502 */
1503 static {
1504 SharedSecrets.setJavaLangReflectModuleAccess(
1505 new JavaLangReflectModuleAccess() {
1506 @Override
1507 public Module defineUnnamedModule(ClassLoader loader) {
1508 return new Module(loader);
1509 }
1510 @Override
1511 public Module defineModule(ClassLoader loader,
1512 ModuleDescriptor descriptor,
1513 URI uri) {
1514 return new Module(null, loader, descriptor, uri);
1515 }
1516 @Override
1517 public void addReads(Module m1, Module m2) {
1518 m1.implAddReads(m2, true);
1519 }
1520 @Override
1521 public void addReadsAllUnnamed(Module m) {
1522 m.implAddReads(Module.ALL_UNNAMED_MODULE);
1523 }
1524 @Override
1525 public void addExports(Module m, String pn, Module other) {
1526 m.implAddExportsOrOpens(pn, other, false, true);
1527 }
1528 @Override
1529 public void addOpens(Module m, String pn, Module other) {
1530 m.implAddExportsOrOpens(pn, other, true, true);
1531 }
1532 @Override
1533 public void addExportsToAll(Module m, String pn) {
1534 m.implAddExportsOrOpens(pn, Module.EVERYONE_MODULE, false, true);
1535 }
1536 @Override
1537 public void addOpensToAll(Module m, String pn) {
1538 m.implAddExportsOrOpens(pn, Module.EVERYONE_MODULE, true, true);
1539 }
1540 @Override
1541 public void addExportsToAllUnnamed(Module m, String pn) {
1542 m.implAddExportsOrOpens(pn, Module.ALL_UNNAMED_MODULE, false, true);
1543 }
1544 @Override
1545 public void addOpensToAllUnnamed(Module m, String pn) {
1546 m.implAddExportsOrOpens(pn, Module.ALL_UNNAMED_MODULE, true, true);
1547 }
1548 @Override
1549 public void addUses(Module m, Class<?> service) {
1550 m.implAddUses(service);
1551 }
1552 @Override
1553 public void addPackage(Module m, String pn) {
1554 m.implAddPackage(pn, true);
1555 }
1556 @Override
1557 public ServicesCatalog getServicesCatalog(Layer layer) {
1558 return layer.getServicesCatalog();
1559 }
1560 @Override
1561 public Stream<Layer> layers(Layer layer) {
1562 return layer.layers();
1563 }
1564 @Override
1565 public Stream<Layer> layers(ClassLoader loader) {
1566 return Layer.layers(loader);
1567 }
1568 @Override
1569 public boolean isStaticallyExported(Module module, String pn, Module other) {
1570 return module.isStaticallyExportedOrOpen(pn, other, false);
1571 }
1572 });
1573 }
1574 }