| /* |
| * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| package jdk.internal.module; |
| |
| import java.lang.module.ModuleDescriptor; |
| import java.lang.module.ModuleFinder; |
| import java.lang.module.ModuleReference; |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| /** |
| * Defines methods to compute the default set of root modules for the unnamed |
| * module. |
| */ |
| |
| public final class DefaultRoots { |
| private static final String JAVA_SE = "java.se"; |
| |
| private DefaultRoots() { } |
| |
| /** |
| * Returns the default set of root modules for the unnamed module computed from |
| * the system modules observable with the given module finder. |
| */ |
| static Set<String> compute(ModuleFinder systemModuleFinder, ModuleFinder finder) { |
| Set<String> roots = new HashSet<>(); |
| |
| boolean hasJava = false; |
| if (systemModuleFinder.find(JAVA_SE).isPresent()) { |
| if (finder == systemModuleFinder || finder.find(JAVA_SE).isPresent()) { |
| // java.se is a system module |
| hasJava = true; |
| roots.add(JAVA_SE); |
| } |
| } |
| |
| for (ModuleReference mref : systemModuleFinder.findAll()) { |
| String mn = mref.descriptor().name(); |
| if (hasJava && mn.startsWith("java.")) { |
| // not a root |
| continue; |
| } |
| |
| if (ModuleResolution.doNotResolveByDefault(mref)) { |
| // not a root |
| continue; |
| } |
| |
| if ((finder == systemModuleFinder || finder.find(mn).isPresent())) { |
| // add as root if exports at least one package to all modules |
| ModuleDescriptor descriptor = mref.descriptor(); |
| for (ModuleDescriptor.Exports e : descriptor.exports()) { |
| if (!e.isQualified()) { |
| roots.add(mn); |
| break; |
| } |
| } |
| } |
| } |
| |
| return roots; |
| } |
| |
| /** |
| * Returns the default set of root modules for the unnamed module from the |
| * modules observable with the given module finder. |
| */ |
| public static Set<String> compute(ModuleFinder finder) { |
| return compute(finder, finder); |
| } |
| } |