1 /*

     2  * Copyright (c) 2018, 2019, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     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 import java.lang.module.ModuleDescriptor;

    25 import java.lang.module.ModuleFinder;

    26 import java.lang.module.ModuleReference;

    27 

    28 import jdk.internal.module.ModuleResolution;

    29 

    30 /**

    31  * Test the set of modules in the boot layer includes all modules that export

    32  * an API. Also test that java.se is not resolved.

    33  */

    34 

    35 public class TestRootModules {

    36     public static void main(String[] args) {

    37         // all modules that export an API should be resolved

    38         // For now, this test ignores the ModuleResolution attribute

    39         ModuleLayer bootLayer = ModuleLayer.boot();

    40         ModuleFinder.ofSystem().findAll().stream()

    41             .filter(mref -> !ModuleResolution.doNotResolveByDefault(mref))

    42             .map(ModuleReference::descriptor)

    43             .filter(descriptor -> descriptor.exports()

    44                     .stream()

    45                     .filter(e -> !e.isQualified())

    46                     .findAny()

    47                     .isPresent())

    48             .map(ModuleDescriptor::name)

    49             .forEach(name -> {

    50                 if (!bootLayer.findModule(name).isPresent())

    51                     throw new RuntimeException(name + " not in boot layer");

    52             });

    53 

    54         // java.se should not be resolved

    55         ModuleLayer.boot()

    56                 .findModule("java.se")

    57                 .map(m -> { throw new RuntimeException("java.se should not be resolved"); });

    58     }

    59 }