1 /*
   2  * Copyright (c) 2018, 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.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 
  25 import java.lang.module.ModuleDescriptor;
  26 import java.lang.module.ModuleFinder;
  27 import java.lang.module.ModuleReference;
  28 
  29 /**
  30  * Test the set of modules in the boot layer includes all modules that export
  31  * an API. Also test that java.se is not resolved.
  32  */
  33 
  34 public class TestRootModules {
  35     public static void main(String[] args) {
  36         // all modules that export an API should be resolved
  37         // For now, this test ignores the ModuleResolution attribute
  38         ModuleLayer bootLayer = ModuleLayer.boot();
  39         ModuleFinder.ofSystem().findAll().stream()
  40             .map(ModuleReference::descriptor)
  41             .filter(descriptor -> descriptor.exports()
  42                     .stream()
  43                     .filter(e -> !e.isQualified())
  44                     .findAny()
  45                     .isPresent())
  46             .map(ModuleDescriptor::name)
  47             .forEach(name -> {
  48                 if (!bootLayer.findModule(name).isPresent())
  49                     throw new RuntimeException(name + " not in boot layer");
  50             });
  51 
  52         // java.se should not be resolved
  53         ModuleLayer.boot()
  54                 .findModule("java.se")
  55                 .map(m -> { throw new RuntimeException("java.se should not be resolved"); });
  56     }
  57 }