82 lines
3.1 KiB
Java
82 lines
3.1 KiB
Java
/*
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* Copyright (c) 2017, 2018, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package jdk.internal.module;
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import java.lang.module.ModuleDescriptor;
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import java.lang.module.ModuleFinder;
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import java.lang.module.ModuleReference;
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import java.util.Set;
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import java.util.stream.Collectors;
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/**
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* Defines methods to compute the default set of root modules for the unnamed
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* module.
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*/
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public final class DefaultRoots {
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private DefaultRoots() { }
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/**
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* Returns the default set of root modules for the unnamed module from the
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* modules observable with the intersection of two module finders.
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*
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* The first module finder should be the module finder that finds modules on
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* the upgrade module path or among the system modules. The second module
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* finder should be the module finder that finds all modules on the module
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* path, or a subset of when using --limit-modules.
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*/
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static Set<String> compute(ModuleFinder finder1, ModuleFinder finder2) {
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return finder1.findAll().stream()
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.filter(mref -> !ModuleResolution.doNotResolveByDefault(mref))
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.map(ModuleReference::descriptor)
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.filter(descriptor -> finder2.find(descriptor.name()).isPresent()
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&& exportsAPI(descriptor))
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.map(ModuleDescriptor::name)
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.collect(Collectors.toSet());
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}
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/**
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* Returns the default set of root modules for the unnamed module from the
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* modules observable with the given module finder.
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*
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* This method is used by the jlink system modules plugin.
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*/
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public static Set<String> compute(ModuleFinder finder) {
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return compute(finder, finder);
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}
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/**
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* Returns true if the given module exports a package to all modules
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*/
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private static boolean exportsAPI(ModuleDescriptor descriptor) {
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return descriptor.exports()
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.stream()
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.filter(e -> !e.isQualified())
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.findAny()
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.isPresent();
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}
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}
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