1/* 2 * Copyright (c) 2016, 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 24package version; 25 26import java.security.AccessControlException; 27import java.security.AccessController; 28import java.security.Permission; 29import java.security.PrivilegedAction; 30 31public class Version { 32 private static final Permission PERM1 = new RuntimePermission("setIO"); 33 private static final Permission PERM2 = new RuntimePermission("setFactory"); 34 35 public int getVersion() { 36 checkPermission(PERM1, false); 37 checkPermission(PERM2, true); 38 return 9; 39 } 40 41 private void checkPermission(Permission perm, boolean expectException) { 42 boolean getException = (Boolean) AccessController 43 .doPrivileged((PrivilegedAction) () -> { 44 try { 45 AccessController.checkPermission(perm); 46 return (Boolean) false; 47 } catch (AccessControlException ex) { 48 return (Boolean) true; 49 } 50 }); 51 52 if (expectException ^ getException) { 53 String message = "Check Permission :" + perm + "\n ExpectException = " 54 + expectException + "\n getException = " + getException; 55 throw new RuntimeException(message); 56 } 57 } 58} 59