1 /* 2 * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 package p1; 24 25 import java.lang.module.ModuleFinder; 26 import java.util.Set; 27 import java.util.stream.Collectors; 28 import java.util.stream.Stream; 29 30 /** 31 * This tests if JAVA_HOME is linked only with the specified modules. 32 */ 33 public class Main { 34 public static void main(String... args) { 35 Set<String> modules = ModuleFinder.ofSystem().findAll().stream() 36 .map(mref -> mref.descriptor().name()) 37 .filter(mn -> !mn.equals("java.base")) 38 .collect(Collectors.toSet()); 39 40 Set<String> notLinked = Stream.of(args).filter(mn -> !modules.contains(mn)) 41 .collect(Collectors.toSet()); 42 if (!notLinked.isEmpty()) { 43 throw new RuntimeException("Expected modules not linked in the image: " 44 + notLinked); 45 } 46 Stream.of(args).forEach(modules::remove); 47 48 if (!modules.isEmpty()) { 49 throw new RuntimeException("Unexpected modules linked in the image: " 50 + modules); 51 } 52 } 53 }