001    /**
002     * Licensed to the Apache Software Foundation (ASF) under one or more
003     * contributor license agreements.  See the NOTICE file distributed with
004     * this work for additional information regarding copyright ownership.
005     * The ASF licenses this file to You under the Apache License, Version 2.0
006     * (the "License"); you may not use this file except in compliance with
007     * the License.  You may obtain a copy of the License at
008     *
009     *     http://www.apache.org/licenses/LICENSE-2.0
010     *
011     * Unless required by applicable law or agreed to in writing, software
012     * distributed under the License is distributed on an "AS IS" BASIS,
013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     * See the License for the specific language governing permissions and
015     * limitations under the License.
016     */
017    package org.apache.geronimo.corba;
018    
019    import java.io.IOException;
020    import java.io.ObjectInputStream;
021    import java.io.ObjectOutputStream;
022    import javax.ejb.EJBHome;
023    import javax.ejb.EJBObject;
024    import javax.ejb.spi.HandleDelegate;
025    import javax.rmi.PortableRemoteObject;
026    
027    
028    /**
029     * See ejb spec 2.1, 19.5.5.1
030     *
031     * @version $Revision: 706640 $ $Date: 2008-10-21 14:44:05 +0000 (Tue, 21 Oct 2008) $
032     */
033    public class CORBAHandleDelegate implements HandleDelegate {
034    
035        /**
036         * Called by home handles to deserialize stubs in any app server, including ones by other vendors.
037         * The spec seems to imply that a simple cast of in.readObject() should work but in certain
038         * orbs this does not seem to work and in.readObject returns a generic remote stub that needs
039         * to be narrowed.  Although we think this is likely an orb bug this code with narrow will
040         * work in both circumstances.
041         * @param in
042         * @return
043         * @throws ClassNotFoundException
044         * @throws IOException
045         */
046        public EJBHome readEJBHome(ObjectInputStream in) throws ClassNotFoundException, IOException {
047            Object o = in.readObject();
048            EJBHome home = (EJBHome) PortableRemoteObject.narrow(o, EJBHome.class);
049            return home;
050        }
051    
052        /**
053         * Called by handles to deserialize stubs in any app server.  See comment to readEJBHome.
054         * @param in
055         * @return
056         * @throws ClassNotFoundException
057         * @throws IOException
058         */
059        public EJBObject readEJBObject(ObjectInputStream in) throws ClassNotFoundException, IOException {
060            Object o = in.readObject();
061            EJBObject object = (EJBObject) PortableRemoteObject.narrow(o, EJBObject.class);
062            return object;
063        }
064    
065        public void writeEJBHome(EJBHome ejbHome, ObjectOutputStream out) throws IOException {
066            out.writeObject(ejbHome);
067        }
068    
069        public void writeEJBObject(EJBObject ejbObject, ObjectOutputStream out) throws IOException {
070            out.writeObject(ejbObject);
071        }
072    
073    }