94 lines
3.3 KiB
Java
94 lines
3.3 KiB
Java
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/*
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* Copyright (c) 2017, 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.HashSet;
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import java.util.Set;
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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 static final String JAVA_SE = "java.se";
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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 computed from
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* the system modules observable with the given module finder.
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*/
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static Set<String> compute(ModuleFinder systemModuleFinder, ModuleFinder finder) {
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Set<String> roots = new HashSet<>();
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boolean hasJava = false;
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if (systemModuleFinder.find(JAVA_SE).isPresent()) {
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if (finder == systemModuleFinder || finder.find(JAVA_SE).isPresent()) {
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// java.se is a system module
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hasJava = true;
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roots.add(JAVA_SE);
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}
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}
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for (ModuleReference mref : systemModuleFinder.findAll()) {
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String mn = mref.descriptor().name();
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if (hasJava && mn.startsWith("java.")) {
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// not a root
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continue;
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}
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if (ModuleResolution.doNotResolveByDefault(mref)) {
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// not a root
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continue;
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}
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if ((finder == systemModuleFinder || finder.find(mn).isPresent())) {
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// add as root if exports at least one package to all modules
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ModuleDescriptor descriptor = mref.descriptor();
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for (ModuleDescriptor.Exports e : descriptor.exports()) {
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if (!e.isQualified()) {
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roots.add(mn);
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break;
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}
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}
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}
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}
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return roots;
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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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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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