001 /* 002 * Created on Dec 21, 2009 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except 005 * in compliance with the License. You may obtain a copy of the License at 006 * 007 * http://www.apache.org/licenses/LICENSE-2.0 008 * 009 * Unless required by applicable law or agreed to in writing, software distributed under the License 010 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express 011 * or implied. See the License for the specific language governing permissions and limitations under 012 * the License. 013 * 014 * Copyright @2009-2010 the original author or authors. 015 */ 016 package org.fest.swing.security; 017 018 /** 019 * Understands installing/uninstalling a <code>{@link NoExitSecurityManager}</code>. 020 * 021 * @author Alex Ruiz 022 */ 023 public class NoExitSecurityManagerInstaller { 024 025 /** 026 * Installs a new <code>{@link NoExitSecurityManager}</code> in <code>System</code>. 027 * @return this installer. 028 */ 029 public static NoExitSecurityManagerInstaller installNoExitSecurityManager() { 030 return new NoExitSecurityManagerInstaller(); 031 } 032 033 /** 034 * Installs a new <code>{@link NoExitSecurityManager}</code> in <code>System</code>. 035 * @param hook gets notified when an application tries to terminate the current JVM. 036 * @return this installer. 037 * @throws NullPointerException if the given hook is <code>null</code>. 038 */ 039 public static NoExitSecurityManagerInstaller installNoExitSecurityManager(ExitCallHook hook) { 040 return new NoExitSecurityManagerInstaller(hook); 041 } 042 043 private final SecurityManager oldManager; 044 045 private NoExitSecurityManagerInstaller() { 046 this(new NoExitSecurityManager()); 047 } 048 049 private NoExitSecurityManagerInstaller(ExitCallHook hook) { 050 this(new NoExitSecurityManager(hook)); 051 } 052 053 private NoExitSecurityManagerInstaller(NoExitSecurityManager newManager) { 054 oldManager = System.getSecurityManager(); 055 System.setSecurityManager(newManager); 056 } 057 058 /** 059 * Uninstalls the <code>{@link NoExitSecurityManager}</code> installed by 060 * <code>{@link #installNoExitSecurityManager()}</code>, restoring the original <code>{@link SecurityManager}</code>. 061 */ 062 public void uninstall() { 063 System.setSecurityManager(oldManager); 064 } 065 }