1adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project/* 2adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * Licensed to the Apache Software Foundation (ASF) under one or more 3adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * contributor license agreements. See the NOTICE file distributed with 4adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * this work for additional information regarding copyright ownership. 5adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * The ASF licenses this file to You under the Apache License, Version 2.0 6adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * (the "License"); you may not use this file except in compliance with 7adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * the License. You may obtain a copy of the License at 8adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * 9adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * http://www.apache.org/licenses/LICENSE-2.0 10adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * 11adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * Unless required by applicable law or agreed to in writing, software 12adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * distributed under the License is distributed on an "AS IS" BASIS, 13adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * See the License for the specific language governing permissions and 15adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * limitations under the License. 16adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 17adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 18adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Projectpackage java.security; 19adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 20adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Projectimport java.io.IOException; 21adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Projectimport java.io.Serializable; 22adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 23adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project/** 24adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * {@code GuardedObject} controls access to an object, by checking all requests 25adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * for the object with a {@code Guard}. 26adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 27adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Projectpublic class GuardedObject implements Serializable { 28adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 29adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project private static final long serialVersionUID = -5240450096227834308L; 30adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 31adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project private final Object object; 32adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 33adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project private final Guard guard; 34adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 35adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /** 36adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * Constructs a new instance of {@code GuardedObject} which protects access 37adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * to the specified {@code Object} using the specified {@code Guard}. 382f9e468ed4985edfd5e351faf2089d91e561e41dElliott Hughes * 39adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @param object 40adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * the {@code Object} to protect. 41adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @param guard 42adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * the {@code Guard} which protects the specified {@code Object}, 43adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * maybe {@code null}. 44adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 45adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project public GuardedObject(Object object, Guard guard) { 46adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project this.object = object; 47adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project this.guard = guard; 48adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 49adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 50adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /** 51adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * Returns the guarded {@code Object} if the associated {@code Guard} 52adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * permits access. If access is not granted, then a {@code 53adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * SecurityException} is thrown. 542f9e468ed4985edfd5e351faf2089d91e561e41dElliott Hughes * 55adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @return the guarded object. 56adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @exception SecurityException 57adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * if access is not granted to the guarded object. 58adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 59adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project public Object getObject() throws SecurityException { 60adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project if (guard != null) { 61adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project guard.checkGuard(object); 62adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 63adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project return object; 64adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 65adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 66adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /** 67adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * Checks the guard (if there is one) before performing a default 68adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * serialization. 69adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 70adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project private void writeObject(java.io.ObjectOutputStream out) throws IOException { 71adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project if (guard != null) { 72adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project guard.checkGuard(object); 73adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 74adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project out.defaultWriteObject(); 75adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 76adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project} 77