| /* |
| * Copyright (c) 2006, 2012, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package java.io; |
| |
| /** |
| * Context during upcalls from object stream to class-defined |
| * readObject/writeObject methods. |
| * Holds object currently being deserialized and descriptor for current class. |
| * |
| * This context keeps track of the thread it was constructed on, and allows |
| * only a single call of defaultReadObject, readFields, defaultWriteObject |
| * or writeFields which must be invoked on the same thread before the class's |
| * readObject/writeObject method has returned. |
| * If not set to the current thread, the getObj method throws NotActiveException. |
| */ |
| final class SerialCallbackContext { |
| private final Object obj; |
| private final ObjectStreamClass desc; |
| /** |
| * Thread this context is in use by. |
| * As this only works in one thread, we do not need to worry about thread-safety. |
| */ |
| private Thread thread; |
| |
| public SerialCallbackContext(Object obj, ObjectStreamClass desc) { |
| this.obj = obj; |
| this.desc = desc; |
| this.thread = Thread.currentThread(); |
| } |
| |
| public Object getObj() throws NotActiveException { |
| checkAndSetUsed(); |
| return obj; |
| } |
| |
| public ObjectStreamClass getDesc() { |
| return desc; |
| } |
| |
| public void check() throws NotActiveException { |
| if (thread != null && thread != Thread.currentThread()) { |
| throw new NotActiveException( |
| "expected thread: " + thread + ", but got: " + Thread.currentThread()); |
| } |
| } |
| |
| public void checkAndSetUsed() throws NotActiveException { |
| if (thread != Thread.currentThread()) { |
| throw new NotActiveException( |
| "not in readObject invocation or fields already read"); |
| } |
| thread = null; |
| } |
| |
| public void setUsed() { |
| thread = null; |
| } |
| } |