Showing the changes to java/pkg/sun/rmi/server/MarshalOutputStream.java (1 of 18352 files). Show all
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| 1 | /* | ||
| 2 | * Copyright (c) 1996, 2008, Oracle and/or its affiliates. All rights reserved. | ||
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | ||
| 4 | * | ||
| 5 | * This code is free software; you can redistribute it and/or modify it | ||
| 6 | * under the terms of the GNU General Public License version 2 only, as | ||
| 7 | * published by the Free Software Foundation. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle in the LICENSE file that accompanied this code. | ||
| 10 | * | ||
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT | ||
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| 14 | * version 2 for more details (a copy is included in the LICENSE file that | ||
| 15 | * accompanied this code). | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU General Public License version | ||
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, | ||
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| 20 | * | ||
| 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | |||
| 26 | package sun.rmi.server; | ||
| 27 | |||
| 28 | import java.io.*; | ||
| 29 | import java.rmi.Remote; | ||
| 30 | import java.rmi.server.RemoteStub; | ||
| 31 | import sun.rmi.transport.ObjectTable; | ||
| 32 | import sun.rmi.transport.Target; | ||
| 33 | |||
| 34 | /** | ||
| 35 | * A MarshalOutputStream extends ObjectOutputStream to add functions | ||
| 36 | * specific to marshaling of remote object references. If it is | ||
| 37 | * necessary to serialize remote objects or objects that contain | ||
| 38 | * references to remote objects a MarshalOutputStream must be used | ||
| 39 | * instead of ObjectOutputStream. <p> | ||
| 40 | * | ||
| 41 | * A new MarshalOutputStream is constructed to serialize remote | ||
| 42 | * objects or graphs containing remote objects. Objects are written to | ||
| 43 | * the stream using the ObjectOutputStream.writeObject method. <p> | ||
| 44 | * | ||
| 45 | * MarshalOutputStream maps remote objects to the corresponding remote | ||
| 46 | * stub and embeds the location from which to load the stub | ||
| 47 | * classes. The location may be ignored by the client but is supplied. | ||
| 48 | */ | ||
| 49 | public class MarshalOutputStream extends ObjectOutputStream | ||
| 50 | { | ||
| 51 | /** | ||
| 52 | * Creates a marshal output stream with protocol version 1. | ||
| 53 | */ | ||
| 54 | public MarshalOutputStream(OutputStream out) throws IOException { | ||
| 55 | this(out, ObjectStreamConstants.PROTOCOL_VERSION_1); | ||
| 56 | } | ||
| 57 | |||
| 58 | /** | ||
| 59 | * Creates a marshal output stream with the given protocol version. | ||
| 60 | */ | ||
| 61 | public MarshalOutputStream(OutputStream out, int protocolVersion) | ||
| 62 | throws IOException | ||
| 63 | { | ||
| 64 | super(out); | ||
| 65 | this.useProtocolVersion(protocolVersion); | ||
| 66 | java.security.AccessController.doPrivileged( | ||
| 67 | new java.security.PrivilegedAction<Void>() { | ||
| 68 | public Void run() { | ||
| 69 | enableReplaceObject(true); | ||
| 70 | return null; | ||
| 71 | } | ||
| 72 | }); | ||
| 73 | } | ||
| 74 | |||
| 75 | /** | ||
| 76 | * Checks for objects that are instances of java.rmi.Remote | ||
| 77 | * that need to be serialized as proxy objects. | ||
| 78 | */ | ||
| 79 | protected final Object replaceObject(Object obj) throws IOException { | ||
| 80 | if ((obj instanceof Remote) && !(obj instanceof RemoteStub)) { | ||
| 81 | Target target = ObjectTable.getTarget((Remote) obj); | ||
| 82 | if (target != null) { | ||
| 83 | return target.getStub(); | ||
| 84 | } | ||
| 85 | } | ||
| 86 | return obj; | ||
| 87 | } | ||
| 88 | |||
| 89 | /** | ||
| 90 | * Serializes a location from which to load the the specified class. | ||
| 91 | */ | ||
| 92 | protected void annotateClass(Class<?> cl) throws IOException { | ||
| 93 | writeLocation(java.rmi.server.RMIClassLoader.getClassAnnotation(cl)); | ||
| 94 | } | ||
| 95 | |||
| 96 | /** | ||
| 97 | * Serializes a location from which to load the specified class. | ||
| 98 | */ | ||
| 99 | protected void annotateProxyClass(Class<?> cl) throws IOException { | ||
| 100 | annotateClass(cl); | ||
| 101 | } | ||
| 102 | |||
| 103 | /** | ||
| 104 | * Writes the location for the class into the stream. This method can | ||
| 105 | * be overridden by subclasses that store this annotation somewhere | ||
| 106 | * else than as the next object in the stream, as is done by this class. | ||
| 107 | */ | ||
| 108 | protected void writeLocation(String location) throws IOException { | ||
| 109 | writeObject(location); | ||
| 110 | } | ||
| 111 | } | ||