| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package java.security; |
| |
| import java.io.IOException; |
| import java.io.Serializable; |
| |
| /** |
| * {@code GuardedObject} controls access to an object, by checking all requests |
| * for the object with a {@code Guard}. |
| */ |
| public class GuardedObject implements Serializable { |
| |
| private static final long serialVersionUID = -5240450096227834308L; |
| |
| private final Object object; |
| |
| private final Guard guard; |
| |
| /** |
| * Constructs a new instance of {@code GuardedObject} which protects access |
| * to the specified {@code Object} using the specified {@code Guard}. |
| * |
| * @param object |
| * the {@code Object} to protect. |
| * @param guard |
| * the {@code Guard} which protects the specified {@code Object}, |
| * maybe {@code null}. |
| */ |
| public GuardedObject(Object object, Guard guard) { |
| this.object = object; |
| this.guard = guard; |
| } |
| |
| /** |
| * Returns the guarded {@code Object} if the associated {@code Guard} |
| * permits access. If access is not granted, then a {@code |
| * SecurityException} is thrown. |
| * |
| * @return the guarded object. |
| * @exception SecurityException |
| * if access is not granted to the guarded object. |
| */ |
| public Object getObject() throws SecurityException { |
| if (guard != null) { |
| guard.checkGuard(object); |
| } |
| return object; |
| } |
| |
| /** |
| * Checks the guard (if there is one) before performing a default |
| * serialization. |
| */ |
| private void writeObject(java.io.ObjectOutputStream out) throws IOException { |
| if (guard != null) { |
| guard.checkGuard(object); |
| } |
| out.defaultWriteObject(); |
| } |
| } |