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 Set<String> packages = descriptor.packages();
132 int n = packages.size();
133 String[] array = new String[n];
134 int i = 0;
135 for (String pn : packages) {
136 array[i++] = pn.replace('.', '/');
137 }
138 defineModule0(this, isOpen, vs, loc, array);
139 }
140
141
142 /**
143 * Create the unnamed Module for the given ClassLoader.
144 *
145 * @see ClassLoader#getUnnamedModule
146 */
147 private Module(ClassLoader loader) {
148 this.layer = null;
149 this.name = null;
150 this.loader = loader;
151 this.descriptor = null;
152 }
153
154
155 /**
156 * Creates a named module but without defining the module to the VM.
157 *
158 * @apiNote This constructor is for VM white-box testing.
159 */
160 Module(ClassLoader loader, ModuleDescriptor descriptor) {
161 this.layer = null;
162 this.name = descriptor.name();
163 this.loader = loader;
164 this.descriptor = descriptor;
165 }
166
167
168
169 /**
170 * Returns {@code true} if this module is a named module.
171 *
172 * @return {@code true} if this is a named module
173 *
174 * @see ClassLoader#getUnnamedModule()
175 */
176 public boolean isNamed() {
177 return name != null;
178 }
179
180 /**
181 * Returns the module name or {@code null} if this module is an unnamed
182 * module.
183 *
184 * @return The module name
185 */
186 public String getName() {
187 return name;
188 }
189
190 /**
191 * Returns the {@code ClassLoader} for this module.
192 *
193 * <p> If there is a security manager then its {@code checkPermission}
194 * method if first called with a {@code RuntimePermission("getClassLoader")}
195 * permission to check that the caller is allowed to get access to the
196 * class loader. </p>
197 *
198 * @return The class loader for this module
199 *
200 * @throws SecurityException
201 * If denied by the security manager
202 */
203 public ClassLoader getClassLoader() {
204 SecurityManager sm = System.getSecurityManager();
205 if (sm != null) {
206 sm.checkPermission(SecurityConstants.GET_CLASSLOADER_PERMISSION);
207 }
208 return loader;
209 }
210
211 /**
212 * Returns the module descriptor for this module or {@code null} if this
213 * module is an unnamed module.
214 *
215 * @return The module descriptor for this module
216 */
217 public ModuleDescriptor getDescriptor() {
218 return descriptor;
219 }
220
221 /**
222 * Returns the layer that contains this module or {@code null} if this
223 * module is not in a layer.
224 *
225 * A module {@code Layer} contains named modules and therefore this
226 * method always returns {@code null} when invoked on an unnamed module.
227 *
228 * <p> <a href="Proxy.html#dynamicmodule">Dynamic modules</a> are named
229 * modules that are generated at runtime. A dynamic module may or may
230 * not be in a module Layer. </p>
231 *
232 * @return The layer that contains this module
233 *
234 * @see Proxy
235 */
236 public Layer getLayer() {
237 if (isNamed()) {
238 Layer layer = this.layer;
239 if (layer != null)
240 return layer;
241
242 // special-case java.base as it is created before the boot Layer
243 if (loader == null && name.equals("java.base")) {
244 return SharedSecrets.getJavaLangAccess().getBootLayer();
245 }
246 }
247
248 return null;
249 }
250
251
252 // --
253
254 // special Module to mean "all unnamed modules"
255 private static final Module ALL_UNNAMED_MODULE = new Module(null);
256
257 // special Module to mean "everyone"
258 private static final Module EVERYONE_MODULE = new Module(null);
259
260 // set contains EVERYONE_MODULE, used when a package is opened or
261 // exported unconditionally
262 private static final Set<Module> EVERYONE_SET = Set.of(EVERYONE_MODULE);
263
264
265 // -- readability --
266
267 // the modules that this module reads
268 private volatile Set<Module> reads;
269
270 // additional module (2nd key) that some module (1st key) reflectively reads
271 private static final WeakPairMap<Module, Module, Boolean> reflectivelyReads
272 = new WeakPairMap<>();
273
274
275 /**
276 * Indicates if this module reads the given module. This method returns
277 * {@code true} if invoked to test if this module reads itself. It also
278 * returns {@code true} if invoked on an unnamed module (as unnamed
279 * modules read all modules).
280 *
281 * @param other
282 * The other module
283 *
284 * @return {@code true} if this module reads {@code other}
285 *
286 * @see #addReads(Module)
287 */
288 public boolean canRead(Module other) {
289 Objects.requireNonNull(other);
290
291 // an unnamed module reads all modules
292 if (!this.isNamed())
293 return true;
294
295 // all modules read themselves
296 if (other == this)
297 return true;
298
299 // check if this module reads other
300 if (other.isNamed()) {
301 Set<Module> reads = this.reads; // volatile read
302 if (reads != null && reads.contains(other))
303 return true;
304 }
305
306 // check if this module reads the other module reflectively
307 if (reflectivelyReads.containsKeyPair(this, other))
308 return true;
309
310 // if other is an unnamed module then check if this module reads
311 // all unnamed modules
312 if (!other.isNamed()
313 && reflectivelyReads.containsKeyPair(this, ALL_UNNAMED_MODULE))
314 return true;
315
316 return false;
317 }
318
319 /**
320 * If the caller's module is this module then update this module to read
321 * the given module.
322 *
323 * This method is a no-op if {@code other} is this module (all modules read
324 * themselves), this module is an unnamed module (as unnamed modules read
325 * all modules), or this module already reads {@code other}.
326 *
327 * @implNote <em>Read edges</em> added by this method are <em>weak</em> and
328 * do not prevent {@code other} from being GC'ed when this module is
329 * strongly reachable.
330 *
331 * @param other
332 * The other module
333 *
334 * @return this module
335 *
336 * @throws IllegalStateException
337 * If this is a named module and the caller is not this module
338 *
339 * @see #canRead
340 */
341 @CallerSensitive
342 public Module addReads(Module other) {
343 Objects.requireNonNull(other);
344 if (this.isNamed()) {
345 Module caller = Reflection.getCallerClass().getModule();
346 if (caller != this) {
347 throw new IllegalStateException(caller + " != " + this);
348 }
349 implAddReads(other, true);
350 }
351 return this;
352 }
353
354 /**
355 * Updates this module to read another module.
356 *
357 * @apiNote This method is for Proxy use and white-box testing.
358 */
359 void implAddReads(Module other) {
360 implAddReads(other, true);
361 }
362
363 /**
364 * Updates this module to read another module without notifying the VM.
365 *
366 * @apiNote This method is for VM white-box testing.
367 */
368 void implAddReadsNoSync(Module other) {
369 implAddReads(other, false);
370 }
371
372 /**
373 * Makes the given {@code Module} readable to this module.
374 *
375 * If {@code syncVM} is {@code true} then the VM is notified.
376 */
377 private void implAddReads(Module other, boolean syncVM) {
378 Objects.requireNonNull(other);
379
380 // nothing to do
381 if (other == this || !this.isNamed())
382 return;
383
384 // check if we already read this module
385 Set<Module> reads = this.reads;
386 if (reads != null && reads.contains(other))
387 return;
388
389 // update VM first, just in case it fails
390 if (syncVM) {
391 if (other == ALL_UNNAMED_MODULE) {
392 addReads0(this, null);
393 } else {
394 addReads0(this, other);
395 }
396 }
397
398 // add reflective read
399 reflectivelyReads.putIfAbsent(this, other, Boolean.TRUE);
400 }
401
402
403 // -- exported and open packages --
404
405 // the packages are open to other modules, can be null
406 // if the value contains EVERYONE_MODULE then the package is open to all
407 private volatile Map<String, Set<Module>> openPackages;
408
409 // the packages that are exported, can be null
410 // if the value contains EVERYONE_MODULE then the package is exported to all
411 private volatile Map<String, Set<Module>> exportedPackages;
412
413 // additional exports or opens added at run-time
414 // this module (1st key), other module (2nd key)
415 // (package name, open?) (value)
416 private static final WeakPairMap<Module, Module, Map<String, Boolean>>
417 reflectivelyExports = new WeakPairMap<>();
418
419
420 /**
421 * Returns {@code true} if this module exports the given package to at
422 * least the given module.
423 *
424 * <p> This method returns {@code true} if invoked to test if a package in
425 * this module is exported to itself. It always returns {@code true} when
426 * invoked on an unnamed module. A package that is {@link #isOpen open} to
427 * the given module is considered exported to that module at run-time and
428 * so this method returns {@code true} if the package is open to the given
429 * module. </p>
430 *
431 * <p> This method does not check if the given module reads this module. </p>
432 *
433 * @param pn
434 * The package name
435 * @param other
436 * The other module
437 *
438 * @return {@code true} if this module exports the package to at least the
439 * given module
440 *
441 * @see ModuleDescriptor#exports()
442 * @see #addExports(String,Module)
443 */
444 public boolean isExported(String pn, Module other) {
445 Objects.requireNonNull(pn);
446 Objects.requireNonNull(other);
447 return implIsExportedOrOpen(pn, other, /*open*/false);
448 }
449
450 /**
451 * Returns {@code true} if this module has <em>opened</em> a package to at
452 * least the given module.
453 *
454 * <p> This method returns {@code true} if invoked to test if a package in
455 * this module is open to itself. It returns {@code true} when invoked on an
456 * {@link ModuleDescriptor#isOpen open} module with a package in the module.
457 * It always returns {@code true} when invoked on an unnamed module. </p>
458 *
459 * <p> This method does not check if the given module reads this module. </p>
460 *
461 * @param pn
462 * The package name
463 * @param other
464 * The other module
465 *
466 * @return {@code true} if this module has <em>opened</em> the package
467 * to at least the given module
468 *
469 * @see ModuleDescriptor#opens()
470 * @see #addOpens(String,Module)
471 * @see AccessibleObject#setAccessible(boolean)
472 * @see java.lang.invoke.MethodHandles#privateLookupIn
473 */
474 public boolean isOpen(String pn, Module other) {
475 Objects.requireNonNull(pn);
476 Objects.requireNonNull(other);
477 return implIsExportedOrOpen(pn, other, /*open*/true);
478 }
479
480 /**
481 * Returns {@code true} if this module exports the given package
482 * unconditionally.
483 *
484 * <p> This method always returns {@code true} when invoked on an unnamed
485 * module. A package that is {@link #isOpen(String) opened} unconditionally
486 * is considered exported unconditionally at run-time and so this method
487 * returns {@code true} if the package is opened unconditionally. </p>
488 *
489 * <p> This method does not check if the given module reads this module. </p>
490 *
491 * @param pn
492 * The package name
493 *
494 * @return {@code true} if this module exports the package unconditionally
495 *
496 * @see ModuleDescriptor#exports()
497 */
498 public boolean isExported(String pn) {
499 Objects.requireNonNull(pn);
500 return implIsExportedOrOpen(pn, EVERYONE_MODULE, /*open*/false);
501 }
502
503 /**
504 * Returns {@code true} if this module has <em>opened</em> a package
505 * unconditionally.
506 *
507 * <p> This method always returns {@code true} when invoked on an unnamed
508 * module. Additionally, it always returns {@code true} when invoked on an
509 * {@link ModuleDescriptor#isOpen open} module with a package in the
510 * module. </p>
511 *
512 * <p> This method does not check if the given module reads this module. </p>
513 *
514 * @param pn
515 * The package name
516 *
517 * @return {@code true} if this module has <em>opened</em> the package
518 * unconditionally
519 *
520 * @see ModuleDescriptor#opens()
521 */
522 public boolean isOpen(String pn) {
523 Objects.requireNonNull(pn);
524 return implIsExportedOrOpen(pn, EVERYONE_MODULE, /*open*/true);
525 }
526
527
528 /**
529 * Returns {@code true} if this module exports or opens the given package
530 * to the given module. If the other module is {@code EVERYONE_MODULE} then
531 * this method tests if the package is exported or opened unconditionally.
532 */
533 private boolean implIsExportedOrOpen(String pn, Module other, boolean open) {
534 // all packages in unnamed modules are open
535 if (!isNamed())
536 return true;
537
538 // all packages are exported/open to self
539 if (other == this && containsPackage(pn))
540 return true;
541
542 // all packages in open modules are open
543 if (descriptor.isOpen())
544 return containsPackage(pn);
545
546 // exported/opened via module declaration/descriptor
547 if (isStaticallyExportedOrOpen(pn, other, open))
548 return true;
549
550 // exported via addExports/addOpens
551 if (isReflectivelyExportedOrOpen(pn, other, open))
552 return true;
553
554 // not exported or open to other
555 return false;
556 }
557
558 /**
559 * Returns {@code true} if this module exports or opens a package to
560 * the given module via its module declaration.
561 */
562 private boolean isStaticallyExportedOrOpen(String pn, Module other, boolean open) {
563 // package is open to everyone or <other>
564 Map<String, Set<Module>> openPackages = this.openPackages;
565 if (openPackages != null) {
566 Set<Module> targets = openPackages.get(pn);
567 if (targets != null) {
568 if (targets.contains(EVERYONE_MODULE))
569 return true;
570 if (other != EVERYONE_MODULE && targets.contains(other))
571 return true;
572 }
573 }
574
575 if (!open) {
576 // package is exported to everyone or <other>
577 Map<String, Set<Module>> exportedPackages = this.exportedPackages;
578 if (exportedPackages != null) {
579 Set<Module> targets = exportedPackages.get(pn);
580 if (targets != null) {
581 if (targets.contains(EVERYONE_MODULE))
582 return true;
583 if (other != EVERYONE_MODULE && targets.contains(other))
584 return true;
585 }
586 }
587 }
588
589 return false;
590 }
591
592
593 /**
594 * Returns {@code true} if this module reflectively exports or opens given
595 * package package to the given module.
596 */
597 private boolean isReflectivelyExportedOrOpen(String pn, Module other, boolean open) {
598 // exported or open to all modules
599 Map<String, Boolean> exports = reflectivelyExports.get(this, EVERYONE_MODULE);
600 if (exports != null) {
601 Boolean b = exports.get(pn);
602 if (b != null) {
603 boolean isOpen = b.booleanValue();
604 if (!open || isOpen) return true;
605 }
606 }
607
608 if (other != EVERYONE_MODULE) {
609
610 // exported or open to other
611 exports = reflectivelyExports.get(this, other);
612 if (exports != null) {
613 Boolean b = exports.get(pn);
614 if (b != null) {
615 boolean isOpen = b.booleanValue();
616 if (!open || isOpen) return true;
617 }
618 }
619
620 // other is an unnamed module && exported or open to all unnamed
621 if (!other.isNamed()) {
622 exports = reflectivelyExports.get(this, ALL_UNNAMED_MODULE);
623 if (exports != null) {
624 Boolean b = exports.get(pn);
625 if (b != null) {
626 boolean isOpen = b.booleanValue();
627 if (!open || isOpen) return true;
628 }
629 }
630 }
631
632 }
633
634 return false;
635 }
636
637
638 /**
639 * If the caller's module is this module then update this module to export
640 * the given package to the given module.
641 *
642 * <p> This method has no effect if the package is already exported (or
643 * <em>open</em>) to the given module. It also has no effect if
644 * invoked on an {@link ModuleDescriptor#isOpen open} module. </p>
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 * @see #isExported(String,Module)
660 */
661 @CallerSensitive
662 public Module addExports(String pn, Module other) {
663 if (pn == null)
664 throw new IllegalArgumentException("package is null");
665 Objects.requireNonNull(other);
666
667 if (isNamed() && !descriptor.isOpen()) {
668 Module caller = Reflection.getCallerClass().getModule();
669 if (caller != this) {
670 throw new IllegalStateException(caller + " != " + this);
671 }
672 implAddExportsOrOpens(pn, other, /*open*/false, /*syncVM*/true);
673 }
674
675 return this;
676 }
677
678 /**
679 * If the caller's module is this module then update this module to
680 * <em>open</em> the given package to the given module.
681 * Opening a package with this method allows all types in the package,
682 * and all their members, not just public types and their public members,
683 * to be reflected on by the given module when using APIs that support
684 * private access or a way to bypass or suppress default Java language
685 * access control checks.
686 *
687 * <p> This method has no effect if the package is already <em>open</em>
688 * to the given module. It also has no effect if invoked on an {@link
689 * ModuleDescriptor#isOpen open} module. </p>
690 *
691 * @param pn
692 * The package name
693 * @param other
694 * The module
695 *
696 * @return this module
697 *
698 * @throws IllegalArgumentException
699 * If {@code pn} is {@code null}, or this is a named module and the
700 * package {@code pn} is not a package in this module
701 * @throws IllegalStateException
702 * If this is a named module and the caller is not this module
703 *
704 * @see #isOpen(String,Module)
705 * @see AccessibleObject#setAccessible(boolean)
706 * @see java.lang.invoke.MethodHandles#privateLookupIn
707 */
708 @CallerSensitive
709 public Module addOpens(String pn, Module other) {
710 if (pn == null)
711 throw new IllegalArgumentException("package is null");
712 Objects.requireNonNull(other);
713
714 if (isNamed() && !descriptor.isOpen()) {
715 Module caller = Reflection.getCallerClass().getModule();
716 if (caller != this) {
717 throw new IllegalStateException(caller + " != " + this);
718 }
719 implAddExportsOrOpens(pn, other, /*open*/true, /*syncVM*/true);
720 }
721
722 return this;
723 }
724
725
726 /**
727 * Updates the exports so that package {@code pn} is exported to module
728 * {@code other} but without notifying the VM.
729 *
730 * @apiNote This method is for VM white-box testing.
731 */
732 void implAddExportsNoSync(String pn, Module other) {
733 if (other == null)
734 other = EVERYONE_MODULE;
735 implAddExportsOrOpens(pn.replace('/', '.'), other, false, false);
736 }
737
738 /**
739 * Updates the exports so that package {@code pn} is exported to module
740 * {@code other}.
741 *
742 * @apiNote This method is for white-box testing.
743 */
744 void implAddExports(String pn, Module other) {
745 implAddExportsOrOpens(pn, other, false, true);
746 }
747
748 /**
749 * Updates the module to open package {@code pn} to module {@code other}.
750 *
751 * @apiNote This method is for white-box tests and jtreg
752 */
753 void implAddOpens(String pn, Module other) {
754 implAddExportsOrOpens(pn, other, true, true);
755 }
756
757 /**
758 * Updates a module to export or open a module to another module.
759 *
760 * If {@code syncVM} is {@code true} then the VM is notified.
761 */
762 private void implAddExportsOrOpens(String pn,
763 Module other,
764 boolean open,
765 boolean syncVM) {
766 Objects.requireNonNull(other);
767 Objects.requireNonNull(pn);
768
769 // all packages are open in unnamed and open modules
770 if (!isNamed() || descriptor.isOpen())
771 return;
772
773 // nothing to do if already exported/open to other
774 if (implIsExportedOrOpen(pn, other, open))
775 return;
776
777 // can only export a package in the module
778 if (!containsPackage(pn)) {
779 throw new IllegalArgumentException("package " + pn
780 + " not in contents");
781 }
782
783 // update VM first, just in case it fails
784 if (syncVM) {
785 String pkgInternalForm = pn.replace('.', '/');
786 if (other == EVERYONE_MODULE) {
787 addExportsToAll0(this, pkgInternalForm);
788 } else if (other == ALL_UNNAMED_MODULE) {
789 addExportsToAllUnnamed0(this, pkgInternalForm);
790 } else {
791 addExports0(this, pkgInternalForm, 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.replace('.', '/'));
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 String sourceInternalForm = source.replace('.', '/');
1177 addExportsToAll0(m, sourceInternalForm);
1178 }
1179 return;
1180 }
1181
1182 Map<String, Set<Module>> openPackages = new HashMap<>();
1183 Map<String, Set<Module>> exportedPackages = new HashMap<>();
1184
1185 // process the open packages first
1186 for (Opens opens : descriptor.opens()) {
1187 String source = opens.source();
1188 String sourceInternalForm = source.replace('.', '/');
1189
1190 if (opens.isQualified()) {
1191 // qualified opens
1192 Set<Module> targets = new HashSet<>();
1193 for (String target : opens.targets()) {
1194 // only open to modules that are in this configuration
1195 Module m2 = nameToModule.get(target);
1196 if (m2 != null) {
1197 addExports0(m, sourceInternalForm, m2);
1198 targets.add(m2);
1199 }
1200 }
1201 if (!targets.isEmpty()) {
1202 openPackages.put(source, targets);
1203 }
1204 } else {
1205 // unqualified opens
1206 addExportsToAll0(m, sourceInternalForm);
1207 openPackages.put(source, EVERYONE_SET);
1208 }
1209 }
1210
1211 // next the exports, skipping exports when the package is open
1212 for (Exports exports : descriptor.exports()) {
1213 String source = exports.source();
1214 String sourceInternalForm = source.replace('.', '/');
1215
1216 // skip export if package is already open to everyone
1217 Set<Module> openToTargets = openPackages.get(source);
1218 if (openToTargets != null && openToTargets.contains(EVERYONE_MODULE))
1219 continue;
1220
1221 if (exports.isQualified()) {
1222 // qualified exports
1223 Set<Module> targets = new HashSet<>();
1224 for (String target : exports.targets()) {
1225 // only export to modules that are in this configuration
1226 Module m2 = nameToModule.get(target);
1227 if (m2 != null) {
1228 // skip qualified export if already open to m2
1229 if (openToTargets == null || !openToTargets.contains(m2)) {
1230 addExports0(m, sourceInternalForm, m2);
1231 targets.add(m2);
1232 }
1233 }
1234 }
1235 if (!targets.isEmpty()) {
1236 exportedPackages.put(source, targets);
1237 }
1238
1239 } else {
1240 // unqualified exports
1241 addExportsToAll0(m, sourceInternalForm);
1242 exportedPackages.put(source, EVERYONE_SET);
1243 }
1244 }
1245
1246 if (!openPackages.isEmpty())
1247 m.openPackages = openPackages;
1248 if (!exportedPackages.isEmpty())
1249 m.exportedPackages = exportedPackages;
1250 }
1251
1252
1253 // -- annotations --
1254
1255 /**
1256 * {@inheritDoc}
1257 * This method returns {@code null} when invoked on an unnamed module.
1258 */
1259 @Override
1260 public <T extends Annotation> T getAnnotation(Class<T> annotationClass) {
1261 return moduleInfoClass().getDeclaredAnnotation(annotationClass);
1262 }
1263
1264 /**
1265 * {@inheritDoc}
1266 * This method returns an empty array when invoked on an unnamed module.
1267 */
1268 @Override
1269 public Annotation[] getAnnotations() {
1270 return moduleInfoClass().getAnnotations();
1271 }
1272
1273 /**
1274 * {@inheritDoc}
1275 * This method returns an empty array when invoked on an unnamed module.
1276 */
1277 @Override
1278 public Annotation[] getDeclaredAnnotations() {
1279 return moduleInfoClass().getDeclaredAnnotations();
1280 }
1281
1282 // cached class file with annotations
1283 private volatile Class<?> moduleInfoClass;
1284
1285 private Class<?> moduleInfoClass() {
1286 Class<?> clazz = this.moduleInfoClass;
1287 if (clazz != null)
1288 return clazz;
1289
1290 synchronized (this) {
1291 clazz = this.moduleInfoClass;
1292 if (clazz == null) {
1293 if (isNamed()) {
1294 PrivilegedAction<Class<?>> pa = this::loadModuleInfoClass;
1295 clazz = AccessController.doPrivileged(pa);
1296 }
1297 if (clazz == null) {
1298 class DummyModuleInfo { }
1299 clazz = DummyModuleInfo.class;
1300 }
1301 this.moduleInfoClass = clazz;
1302 }
1303 return clazz;
1304 }
1305 }
1306
1307 private Class<?> loadModuleInfoClass() {
1308 Class<?> clazz = null;
1309 try (InputStream in = getResourceAsStream("module-info.class")) {
1310 if (in != null)
1311 clazz = loadModuleInfoClass(in);
1312 } catch (Exception ignore) { }
1313 return clazz;
1314 }
1315
1316 /**
1317 * Loads module-info.class as a package-private interface in a class loader
1318 * that is a child of this module's class loader.
1319 */
1320 private Class<?> loadModuleInfoClass(InputStream in) throws IOException {
1321 final String MODULE_INFO = "module-info";
1322
1323 ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS
1324 + ClassWriter.COMPUTE_FRAMES);
1325
1326 ClassVisitor cv = new ClassVisitor(Opcodes.ASM5, cw) {
1327 @Override
1328 public void visit(int version,
1329 int access,
1330 String name,
1331 String signature,
1332 String superName,
1333 String[] interfaces) {
1334 cw.visit(version,
1335 Opcodes.ACC_INTERFACE
1336 + Opcodes.ACC_ABSTRACT
1337 + Opcodes.ACC_SYNTHETIC,
1338 MODULE_INFO,
1339 null,
1340 "java/lang/Object",
1341 null);
1342 }
1343 @Override
1344 public AnnotationVisitor visitAnnotation(String desc, boolean visible) {
1345 // keep annotations
1346 return super.visitAnnotation(desc, visible);
1347 }
1348 @Override
1349 public void visitAttribute(Attribute attr) {
1350 // drop non-annotation attributes
1351 }
1352 };
1353
1354 ClassReader cr = new ClassReader(in);
1355 cr.accept(cv, 0);
1356 byte[] bytes = cw.toByteArray();
1357
1358 ClassLoader cl = new ClassLoader(loader) {
1359 @Override
1360 protected Class<?> findClass(String cn)throws ClassNotFoundException {
1361 if (cn.equals(MODULE_INFO)) {
1362 return super.defineClass(cn, bytes, 0, bytes.length);
1363 } else {
1364 throw new ClassNotFoundException(cn);
1365 }
1366 }
1367 };
1368
1369 try {
1370 return cl.loadClass(MODULE_INFO);
1371 } catch (ClassNotFoundException e) {
1372 throw new InternalError(e);
1373 }
1374 }
1375
1376
1377 // -- misc --
1378
1379
1380 /**
1381 * Returns an input stream for reading a resource in this module. The
1382 * {@code name} parameter is a {@code '/'}-separated path name that
1383 * identifies the resource.
1384 *
1385 * <p> A resource in a named modules may be <em>encapsulated</em> so that
1386 * it cannot be located by code in other modules. Whether a resource can be
1387 * located or not is determined as follows:
1388 *
1389 * <ul>
1390 * <li> The <em>package name</em> of the resource is derived from the
1391 * subsequence of characters that precedes the last {@code '/'} and then
1392 * replacing each {@code '/'} character in the subsequence with
1393 * {@code '.'}. For example, the package name derived for a resource
1394 * named "{@code a/b/c/foo.properties}" is "{@code a.b.c}". </li>
1395 *
1396 * <li> If the package name is a package in the module then the package
1397 * must be {@link #isOpen open} the module of the caller of this method.
1398 * If the package is not in the module then the resource is not
1399 * encapsulated. Resources in the unnamed package or "{@code META-INF}",
1400 * for example, are never encapsulated because they can never be
1401 * packages in a named module. </li>
1402 *
1403 * <li> As a special case, resources ending with "{@code .class}" are
1404 * never encapsulated. </li>
1405 * </ul>
1406 *
1407 * <p> This method returns {@code null} if the resource is not in this
1408 * module, the resource is encapsulated and cannot be located by the caller,
1409 * or access to the resource is denied by the security manager.
1410 *
1411 * @param name
1412 * The resource name
1413 *
1414 * @return An input stream for reading the resource or {@code null}
1415 *
1416 * @throws IOException
1417 * If an I/O error occurs
1418 *
1419 * @see java.lang.module.ModuleReader#open(String)
1420 */
1421 @CallerSensitive
1422 public InputStream getResourceAsStream(String name) throws IOException {
1423 Objects.requireNonNull(name);
1424
1425 if (isNamed() && !ResourceHelper.isSimpleResource(name)) {
1426 Module caller = Reflection.getCallerClass().getModule();
1427 if (caller != this && caller != Object.class.getModule()) {
1428 // ignore packages added for proxies via addPackage
1429 Set<String> packages = getDescriptor().packages();
1430 String pn = ResourceHelper.getPackageName(name);
1431 if (packages.contains(pn) && !isOpen(pn, caller)) {
1432 // resource is in package not open to caller
1433 return null;
1434 }
1435 }
1436 }
1437
1438 String mn = this.name;
1439
1440 // special-case built-in class loaders to avoid URL connection
1441 if (loader == null) {
1442 return BootLoader.findResourceAsStream(mn, name);
1443 } else if (loader instanceof BuiltinClassLoader) {
1444 return ((BuiltinClassLoader) loader).findResourceAsStream(mn, name);
1445 }
1446
1447 // locate resource in module
1448 JavaLangAccess jla = SharedSecrets.getJavaLangAccess();
1449 URL url = jla.findResource(loader, mn, name);
1450 if (url != null) {
1451 try {
1452 return url.openStream();
1453 } catch (SecurityException e) { }
1454 }
1455
1456 return null;
1457 }
1458
1459 /**
1460 * Returns the string representation of this module. For a named module,
1461 * the representation is the string {@code "module"}, followed by a space,
1462 * and then the module name. For an unnamed module, the representation is
1463 * the string {@code "unnamed module"}, followed by a space, and then an
1464 * implementation specific string that identifies the unnamed module.
1465 *
1466 * @return The string representation of this module
1467 */
1468 @Override
1469 public String toString() {
1470 if (isNamed()) {
1471 return "module " + name;
1472 } else {
1473 String id = Integer.toHexString(System.identityHashCode(this));
1474 return "unnamed module @" + id;
1475 }
1476 }
1477
1478
1479 // -- native methods --
1480
1481 // JVM_DefineModule
1482 private static native void defineModule0(Module module,
1483 boolean isOpen,
1484 String version,
1485 String location,
1486 String[] pns);
1487
1488 // JVM_AddReadsModule
1489 private static native void addReads0(Module from, Module to);
1490
1491 // JVM_AddModuleExports
1492 private static native void addExports0(Module from, String pn, Module to);
1493
1494 // JVM_AddModuleExportsToAll
1495 private static native void addExportsToAll0(Module from, String pn);
1496
1497 // JVM_AddModuleExportsToAllUnnamed
1498 private static native void addExportsToAllUnnamed0(Module from, String pn);
1499
1500 // JVM_AddModulePackage
1501 private static native void addPackage0(Module m, String pn);
1502
1503 /**
1504 * Register shared secret to provide access to package-private methods
1505 */
1506 static {
1507 SharedSecrets.setJavaLangReflectModuleAccess(
1508 new JavaLangReflectModuleAccess() {
1509 @Override
1510 public Module defineUnnamedModule(ClassLoader loader) {
1511 return new Module(loader);
1512 }
1513 @Override
1514 public Module defineModule(ClassLoader loader,
1515 ModuleDescriptor descriptor,
1516 URI uri) {
1517 return new Module(null, loader, descriptor, uri);
1518 }
1519 @Override
1520 public void addReads(Module m1, Module m2) {
1521 m1.implAddReads(m2, true);
1522 }
1523 @Override
1524 public void addReadsAllUnnamed(Module m) {
1525 m.implAddReads(Module.ALL_UNNAMED_MODULE);
1526 }
1527 @Override
1528 public void addExports(Module m, String pn, Module other) {
1529 m.implAddExportsOrOpens(pn, other, false, true);
1530 }
1531 @Override
1532 public void addOpens(Module m, String pn, Module other) {
1533 m.implAddExportsOrOpens(pn, other, true, true);
1534 }
1535 @Override
1536 public void addExportsToAll(Module m, String pn) {
1537 m.implAddExportsOrOpens(pn, Module.EVERYONE_MODULE, false, true);
1538 }
1539 @Override
1540 public void addOpensToAll(Module m, String pn) {
1541 m.implAddExportsOrOpens(pn, Module.EVERYONE_MODULE, true, true);
1542 }
1543 @Override
1544 public void addExportsToAllUnnamed(Module m, String pn) {
1545 m.implAddExportsOrOpens(pn, Module.ALL_UNNAMED_MODULE, false, true);
1546 }
1547 @Override
1548 public void addOpensToAllUnnamed(Module m, String pn) {
1549 m.implAddExportsOrOpens(pn, Module.ALL_UNNAMED_MODULE, true, true);
1550 }
1551 @Override
1552 public void addUses(Module m, Class<?> service) {
1553 m.implAddUses(service);
1554 }
1555 @Override
1556 public void addPackage(Module m, String pn) {
1557 m.implAddPackage(pn, true);
1558 }
1559 @Override
1560 public ServicesCatalog getServicesCatalog(Layer layer) {
1561 return layer.getServicesCatalog();
1562 }
1563 @Override
1564 public Stream<Layer> layers(Layer layer) {
1565 return layer.layers();
1566 }
1567 @Override
1568 public Stream<Layer> layers(ClassLoader loader) {
1569 return Layer.layers(loader);
1570 }
1571 });
1572 }
1573 }