Java example source code file (StubDelegateImpl.java)

This example Java source code file (StubDelegateImpl.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, corba, ioexception, object, remoteexception, rmi, string, stubdelegateimpl, stubiorimpl, utilsystemexception

The StubDelegateImpl.java Java example source code

/*
 * Copyright (c) 1999, 2013, 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.
 */
/*
 * Licensed Materials - Property of IBM
 * RMI-IIOP v1.0
 * Copyright IBM Corp. 1998 1999  All Rights Reserved
 *
 */

package com.sun.corba.se.impl.javax.rmi.CORBA;

import java.io.IOException;

import java.rmi.RemoteException;

import javax.rmi.CORBA.Tie;

import org.omg.CORBA.ORB;
import org.omg.CORBA.SystemException;
import org.omg.CORBA.BAD_OPERATION;
import org.omg.CORBA.BAD_INV_ORDER;

import org.omg.CORBA.portable.Delegate;
import org.omg.CORBA.portable.OutputStream;
import org.omg.CORBA.portable.InputStream;

import com.sun.corba.se.spi.presentation.rmi.StubAdapter;

import com.sun.corba.se.spi.logging.CORBALogDomains ;

import com.sun.corba.se.impl.util.Utility;

import com.sun.corba.se.impl.ior.StubIORImpl ;
import com.sun.corba.se.impl.presentation.rmi.StubConnectImpl ;

import com.sun.corba.se.impl.logging.UtilSystemException ;

/**
 * Base class from which all static RMI-IIOP stubs must inherit.
 */
public class StubDelegateImpl implements javax.rmi.CORBA.StubDelegate
{
    static UtilSystemException wrapper = UtilSystemException.get(
        CORBALogDomains.RMIIIOP ) ;

    private StubIORImpl ior ;

    public StubIORImpl getIOR()
    {
        return ior ;
    }

    public StubDelegateImpl()
    {
        ior = null ;
    }

    /**
     * Sets the IOR components if not already set.
     */
    private void init (javax.rmi.CORBA.Stub self)
    {
        // If the Stub is not connected to an ORB, BAD_OPERATION exception
        // will be raised by the code below.
        if (ior == null)
            ior = new StubIORImpl( self ) ;
    }

    /**
     * Returns a hash code value for the object which is the same for all stubs
     * that represent the same remote object.
     * @return the hash code value.
     */
    public int hashCode(javax.rmi.CORBA.Stub self)
    {
        init(self);
        return ior.hashCode() ;
    }

    /**
     * Compares two stubs for equality. Returns <code>true when used to compare stubs
     * that represent the same remote object, and <code>false otherwise.
     * @param obj the reference object with which to compare.
     * @return <code>true if this object is the same as the obj
     *          argument; <code>false otherwise.
     */
    public boolean equals(javax.rmi.CORBA.Stub self, java.lang.Object obj)
    {
        if (self == obj) {
            return true;
        }

        if (!(obj instanceof javax.rmi.CORBA.Stub)) {
            return false;
        }

        // no need to call init() because of calls to hashCode() below

        javax.rmi.CORBA.Stub other = (javax.rmi.CORBA.Stub) obj;
        if (other.hashCode() != self.hashCode()) {
            return false;
        }

        // hashCodes being the same does not mean equality. The stubs still
        // could be pointing to different IORs. So, do a literal comparison.
        // Apparently the ONLY way to do this (other than using private
        // reflection)  toString, because it is not possible to directly
        // access the StubDelegateImpl from the Stub.
        return self.toString().equals( other.toString() ) ;
    }

    public boolean equals( Object obj )
    {
        if (this == obj)
            return true ;

        if (!(obj instanceof StubDelegateImpl))
            return false ;

        StubDelegateImpl other = (StubDelegateImpl)obj ;

        if (ior == null)
            return ior == other.ior ;
        else
            return ior.equals( other.ior ) ;
    }

    public int hashCode() {
        if (ior == null) {
            return 0;
        } else {
            return ior.hashCode();
        }
    }

    /**
     * Returns a string representation of this stub. Returns the same string
     * for all stubs that represent the same remote object.
     * @return a string representation of this stub.
     */
    public String toString(javax.rmi.CORBA.Stub self)
    {
        if (ior == null)
            return null ;
        else
            return ior.toString() ;
    }

    /**
     * Connects this stub to an ORB. Required after the stub is deserialized
     * but not after it is demarshalled by an ORB stream. If an unconnected
     * stub is passed to an ORB stream for marshalling, it is implicitly
     * connected to that ORB. Application code should not call this method
     * directly, but should call the portable wrapper method
     * {@link javax.rmi.PortableRemoteObject#connect}.
     * @param orb the ORB to connect to.
     * @exception RemoteException if the stub is already connected to a different
     * ORB, or if the stub does not represent an exported remote or local object.
     */
    public void connect(javax.rmi.CORBA.Stub self, ORB orb)
        throws RemoteException
    {
        ior = StubConnectImpl.connect( ior, self, self, orb ) ;
    }

    /**
     * Serialization method to restore the IOR state.
     */
    public void readObject(javax.rmi.CORBA.Stub self,
        java.io.ObjectInputStream stream) throws IOException, ClassNotFoundException
    {
        if (ior == null)
            ior = new StubIORImpl() ;

        ior.doRead( stream ) ;
    }

    /**
     * Serialization method to save the IOR state.
     * @serialData The length of the IOR type ID (int), followed by the IOR type ID
     * (byte array encoded using ISO8859-1), followed by the number of IOR profiles
     * (int), followed by the IOR profiles.  Each IOR profile is written as a
     * profile tag (int), followed by the length of the profile data (int), followed
     * by the profile data (byte array).
     */
    public void writeObject(javax.rmi.CORBA.Stub self,
        java.io.ObjectOutputStream stream) throws IOException
    {
        init(self);
        ior.doWrite( stream ) ;
    }
}