/* * Copyright (c) 2022, 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. * * 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. */ import java.nio.file.Path; import java.nio.file.Paths; import java.lang.Module; import java.lang.ModuleLayer; import java.lang.module.ModuleFinder; import java.lang.module.ModuleReference; import java.io.File; import java.net.URL; import java.net.URLClassLoader; import java.util.Arrays; import java.util.List; import java.util.stream.Stream; import java.util.stream.Collectors; // This class creates a dynamic module layer and loads the // panama_module in it. enableNativeAccess on that dynamic // module is called depending on the command line option. // // Usage: // java --enable-native-access=ALL-UNNAMED NativeAccessDynamicMain [main-args] public class NativeAccessDynamicMain { public static void main(String[] args) throws Exception { String modulePath = args[0]; String moduleAndClsName = args[1]; boolean enableNativeAccess = Boolean.parseBoolean(args[2]); String[] mainArgs = args.length > 2? Arrays.copyOfRange(args, 3, args.length) : new String[0]; int idx = moduleAndClsName.indexOf('/'); String moduleName = moduleAndClsName.substring(0, idx); String className = moduleAndClsName.substring(idx+1); Path[] paths = Stream.of(modulePath.split(File.pathSeparator)) .map(Paths::get) .toArray(Path[]::new); ModuleFinder mf = ModuleFinder.of(paths); var mrefs = mf.findAll(); if (mrefs.isEmpty()) { throw new RuntimeException("No modules module path: " + modulePath); } var rootMods = mrefs.stream(). map(mr->mr.descriptor().name()). collect(Collectors.toSet()); ModuleLayer boot = ModuleLayer.boot(); var conf = boot.configuration(). resolve(mf, ModuleFinder.of(), rootMods); String firstMod = rootMods.iterator().next(); URLClassLoader cl = new URLClassLoader(new URL[] { paths[0].toFile().toURL() }); ModuleLayer.Controller controller = boot.defineModulesWithOneLoader(conf, List.of(boot), cl); ModuleLayer layer = controller.layer(); Module mod = layer.findModule(firstMod).get(); // conditionally grant native access to the dynamic module created if (enableNativeAccess) { controller.enableNativeAccess(mod); } Class mainCls = Class.forName(mod, className); var main = mainCls.getMethod("main", String[].class); main.invoke(null, (Object)mainArgs); } }