| /* |
| * Copyright (c) 1996, 2008, 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 sun.rmi.server; |
| |
| import java.io.*; |
| import java.rmi.Remote; |
| import java.rmi.server.RemoteStub; |
| import sun.rmi.transport.ObjectTable; |
| import sun.rmi.transport.Target; |
| |
| /** |
| * A MarshalOutputStream extends ObjectOutputStream to add functions |
| * specific to marshaling of remote object references. If it is |
| * necessary to serialize remote objects or objects that contain |
| * references to remote objects a MarshalOutputStream must be used |
| * instead of ObjectOutputStream. <p> |
| * |
| * A new MarshalOutputStream is constructed to serialize remote |
| * objects or graphs containing remote objects. Objects are written to |
| * the stream using the ObjectOutputStream.writeObject method. <p> |
| * |
| * MarshalOutputStream maps remote objects to the corresponding remote |
| * stub and embeds the location from which to load the stub |
| * classes. The location may be ignored by the client but is supplied. |
| */ |
| public class MarshalOutputStream extends ObjectOutputStream |
| { |
| /** |
| * Creates a marshal output stream with protocol version 1. |
| */ |
| public MarshalOutputStream(OutputStream out) throws IOException { |
| this(out, ObjectStreamConstants.PROTOCOL_VERSION_1); |
| } |
| |
| /** |
| * Creates a marshal output stream with the given protocol version. |
| */ |
| public MarshalOutputStream(OutputStream out, int protocolVersion) |
| throws IOException |
| { |
| super(out); |
| this.useProtocolVersion(protocolVersion); |
| java.security.AccessController.doPrivileged( |
| new java.security.PrivilegedAction<Void>() { |
| public Void run() { |
| enableReplaceObject(true); |
| return null; |
| } |
| }); |
| } |
| |
| /** |
| * Checks for objects that are instances of java.rmi.Remote |
| * that need to be serialized as proxy objects. |
| */ |
| protected final Object replaceObject(Object obj) throws IOException { |
| if ((obj instanceof Remote) && !(obj instanceof RemoteStub)) { |
| Target target = ObjectTable.getTarget((Remote) obj); |
| if (target != null) { |
| return target.getStub(); |
| } |
| } |
| return obj; |
| } |
| |
| /** |
| * Serializes a location from which to load the the specified class. |
| */ |
| protected void annotateClass(Class<?> cl) throws IOException { |
| writeLocation(java.rmi.server.RMIClassLoader.getClassAnnotation(cl)); |
| } |
| |
| /** |
| * Serializes a location from which to load the specified class. |
| */ |
| protected void annotateProxyClass(Class<?> cl) throws IOException { |
| annotateClass(cl); |
| } |
| |
| /** |
| * Writes the location for the class into the stream. This method can |
| * be overridden by subclasses that store this annotation somewhere |
| * else than as the next object in the stream, as is done by this class. |
| */ |
| protected void writeLocation(String location) throws IOException { |
| writeObject(location); |
| } |
| } |