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Java example source code file (RemoteToCorba.java)

This example Java source code file (RemoteToCorba.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

classnotfoundexception, configurationexception, context, corba, hashtable, name, naming, namingexception, object, remotetocorba, rmi, statefactory, util

The RemoteToCorba.java Java example source code

/*
 * Copyright (c) 1999, 2004, 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 com.sun.jndi.cosnaming;

import javax.naming.*;
import javax.naming.spi.StateFactory;
import java.util.Hashtable;

import org.omg.CORBA.ORB;

import java.rmi.Remote;
import java.rmi.server.ExportException;

import com.sun.jndi.toolkit.corba.CorbaUtils;  // for RMI-IIOP

/**
  * StateFactory that turns java.rmi.Remote objects to org.omg.CORBA.Object.
  *
  * @author Rosanna Lee
  */

public class RemoteToCorba implements StateFactory {
    public RemoteToCorba() {
    }

    /**
     * Returns the CORBA object for a Remote object.
     * If input is not a Remote object, or if Remote object uses JRMP, return null.
     * If the RMI-IIOP library is not available, throw ConfigurationException.
     *
     * @param orig The object to turn into a CORBA object. If not Remote,
     *             or if is a JRMP stub or impl, return null.
     * @param name Ignored
     * @param ctx The non-null CNCtx whose ORB to use.
     * @param env Ignored
     * @return The CORBA object for <tt>orig or null.
     * @exception ConfigurationException If the CORBA object cannot be obtained
     *    due to configuration problems, for instance, if RMI-IIOP not available.
     * @exception NamingException If some other problem prevented a CORBA
     *    object from being obtained from the Remote object.
     */
    public Object getStateToBind(Object orig, Name name, Context ctx,
        Hashtable<?,?> env) throws NamingException {
        if (orig instanceof org.omg.CORBA.Object) {
            // Already a CORBA object, just use it
            return null;
        }

        if (orig instanceof Remote) {
            // Turn remote object into org.omg.CORBA.Object
            try {
                // Returns null if JRMP; let next factory try
                // CNCtx will eventually throw IllegalArgumentException if
                // no CORBA object gotten
                return
                    CorbaUtils.remoteToCorba((Remote)orig, ((CNCtx)ctx)._orb);
            } catch (ClassNotFoundException e) {
                // RMI-IIOP library not available
                throw new ConfigurationException(
                    "javax.rmi packages not available");
            }
        }
        return null; // pass and let next state factory try
    }
}

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