Mercurial > hg > openjdk > jdk9 > jdk
view src/java.base/share/classes/jdk/internal/module/IllegalAccessMaps.java @ 17234:f8b19df2115a
8181087: Module system implementation refresh (6/2017)
Reviewed-by: plevart, mchung
Contributed-by: alan.bateman@oracle.com, alex.buckley@oracle.com
author | alanb |
---|---|
date | Fri, 16 Jun 2017 09:20:39 -0700 |
parents | |
children |
line wrap: on
line source
/* * 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.io.BufferedReader; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.io.UncheckedIOException; import java.lang.module.ModuleDescriptor; import java.lang.module.ModuleFinder; import java.lang.module.ModuleReference; import java.util.HashMap; import java.util.HashSet; import java.util.Map; import java.util.Set; import static java.nio.charset.StandardCharsets.*; /** * Generates the maps of concealed and exported packages to open at run-time. * * This is used at run-time for exploded builds, and at link-time to generate * the maps for the system modules in the run-time image. */ public class IllegalAccessMaps { private final Map<String, Set<String>> concealedPackagesToOpen; private final Map<String, Set<String>> exportedPackagesToOpen; private IllegalAccessMaps(Map<String, Set<String>> map1, Map<String, Set<String>> map2) { this.concealedPackagesToOpen = map1; this.exportedPackagesToOpen = map2; } /** * Returns the map of concealed packages to open. The map key is the * module name, the value is the set of concealed packages to open. */ public Map<String, Set<String>> concealedPackagesToOpen() { return concealedPackagesToOpen; } /** * Returns the map of exported packages to open. The map key is the * module name, the value is the set of exported packages to open. */ public Map<String, Set<String>> exportedPackagesToOpen() { return exportedPackagesToOpen; } /** * Generate the maps of module to concealed and exported packages for * the system modules that are observable with the given module finder. */ public static IllegalAccessMaps generate(ModuleFinder finder) { Map<String, ModuleDescriptor> map = new HashMap<>(); finder.findAll().stream() .map(ModuleReference::descriptor) .forEach(md -> md.packages().forEach(pn -> map.putIfAbsent(pn, md))); Map<String, Set<String>> concealedPackagesToOpen = new HashMap<>(); Map<String, Set<String>> exportedPackagesToOpen = new HashMap<>(); String rn = "jdk8_packages.dat"; InputStream in = IllegalAccessMaps.class.getResourceAsStream(rn); if (in == null) { throw new InternalError(rn + " not found"); } try (BufferedReader br = new BufferedReader(new InputStreamReader(in, UTF_8))) { br.lines() .filter(line -> !line.isEmpty() && !line.startsWith("#")) .forEach(pn -> { ModuleDescriptor descriptor = map.get(pn); if (descriptor != null && !isOpen(descriptor, pn)) { String name = descriptor.name(); if (isExported(descriptor, pn)) { exportedPackagesToOpen.computeIfAbsent(name, k -> new HashSet<>()).add(pn); } else { concealedPackagesToOpen.computeIfAbsent(name, k -> new HashSet<>()).add(pn); } } }); } catch (IOException ioe) { throw new UncheckedIOException(ioe); } return new IllegalAccessMaps(concealedPackagesToOpen, exportedPackagesToOpen); } private static boolean isExported(ModuleDescriptor descriptor, String pn) { return descriptor.exports() .stream() .anyMatch(e -> e.source().equals(pn) && !e.isQualified()); } private static boolean isOpen(ModuleDescriptor descriptor, String pn) { return descriptor.opens() .stream() .anyMatch(e -> e.source().equals(pn) && !e.isQualified()); } }