duke@1: /*
ohair@158: * Copyright (c) 1998, 2004, Oracle and/or its affiliates. All rights reserved.
duke@1: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@1: *
duke@1: * This code is free software; you can redistribute it and/or modify it
duke@1: * under the terms of the GNU General Public License version 2 only, as
ohair@158: * published by the Free Software Foundation. Oracle designates this
duke@1: * particular file as subject to the "Classpath" exception as provided
ohair@158: * by Oracle in the LICENSE file that accompanied this code.
duke@1: *
duke@1: * This code is distributed in the hope that it will be useful, but WITHOUT
duke@1: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@1: * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@1: * version 2 for more details (a copy is included in the LICENSE file that
duke@1: * accompanied this code).
duke@1: *
duke@1: * You should have received a copy of the GNU General Public License version
duke@1: * 2 along with this work; if not, write to the Free Software Foundation,
duke@1: * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@1: *
ohair@158: * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
ohair@158: * or visit www.oracle.com if you need additional information or have any
ohair@158: * questions.
duke@1: */
duke@1:
duke@1: /*
duke@1: * Licensed Materials - Property of IBM
duke@1: * RMI-IIOP v1.0
duke@1: * Copyright IBM Corp. 1998 1999 All Rights Reserved
duke@1: *
duke@1: */
duke@1:
duke@1: package javax.rmi.CORBA;
duke@1:
duke@1: import org.omg.CORBA.ORB;
duke@1: import org.omg.CORBA.INITIALIZE;
duke@1: import org.omg.CORBA_2_3.portable.ObjectImpl;
duke@1:
duke@1: import java.io.IOException;
duke@1: import java.rmi.RemoteException;
duke@1: import java.io.File;
duke@1: import java.io.FileInputStream;
duke@1: import java.net.MalformedURLException ;
duke@1: import java.security.AccessController;
duke@1: import java.security.PrivilegedAction;
duke@1: import java.util.Properties;
duke@1: import java.rmi.server.RMIClassLoader;
duke@1:
duke@1: import com.sun.corba.se.impl.orbutil.GetPropertyAction;
duke@1:
duke@1:
duke@1: /**
duke@1: * Base class from which all RMI-IIOP stubs must inherit.
duke@1: */
duke@1: public abstract class Stub extends ObjectImpl
duke@1: implements java.io.Serializable {
duke@1:
duke@1: private static final long serialVersionUID = 1087775603798577179L;
duke@1:
duke@1: // This can only be set at object construction time (no sync necessary).
duke@1: private transient StubDelegate stubDelegate = null;
duke@1: private static Class stubDelegateClass = null;
duke@1: private static final String StubClassKey = "javax.rmi.CORBA.StubClass";
duke@1:
duke@1: static {
alanb@533: Object stubDelegateInstance = createDelegate(StubClassKey);
duke@1: if (stubDelegateInstance != null)
duke@1: stubDelegateClass = stubDelegateInstance.getClass();
duke@1: }
duke@1:
duke@1:
duke@1: /**
duke@1: * Returns a hash code value for the object which is the same for all stubs
duke@1: * that represent the same remote object.
duke@1: * @return the hash code value.
duke@1: */
duke@1: public int hashCode() {
duke@1:
duke@1: if (stubDelegate == null) {
duke@1: setDefaultDelegate();
duke@1: }
duke@1:
duke@1: if (stubDelegate != null) {
duke@1: return stubDelegate.hashCode(this);
duke@1: }
duke@1:
duke@1: return 0;
duke@1: }
duke@1:
duke@1: /**
duke@1: * Compares two stubs for equality. Returns true
when used to compare stubs
duke@1: * that represent the same remote object, and false
otherwise.
duke@1: * @param obj the reference object with which to compare.
duke@1: * @return true
if this object is the same as the obj
duke@1: * argument; false
otherwise.
duke@1: */
duke@1: public boolean equals(java.lang.Object obj) {
duke@1:
duke@1: if (stubDelegate == null) {
duke@1: setDefaultDelegate();
duke@1: }
duke@1:
duke@1: if (stubDelegate != null) {
duke@1: return stubDelegate.equals(this, obj);
duke@1: }
duke@1:
duke@1: return false;
duke@1: }
duke@1:
duke@1: /**
duke@1: * Returns a string representation of this stub. Returns the same string
duke@1: * for all stubs that represent the same remote object.
duke@1: * @return a string representation of this stub.
duke@1: */
duke@1: public String toString() {
duke@1:
duke@1:
duke@1: if (stubDelegate == null) {
duke@1: setDefaultDelegate();
duke@1: }
duke@1:
duke@1: String ior;
duke@1: if (stubDelegate != null) {
duke@1: ior = stubDelegate.toString(this);
duke@1: if (ior == null) {
duke@1: return super.toString();
duke@1: } else {
duke@1: return ior;
duke@1: }
duke@1: }
duke@1: return super.toString();
duke@1: }
duke@1:
duke@1: /**
duke@1: * Connects this stub to an ORB. Required after the stub is deserialized
duke@1: * but not after it is demarshalled by an ORB stream. If an unconnected
duke@1: * stub is passed to an ORB stream for marshalling, it is implicitly
duke@1: * connected to that ORB. Application code should not call this method
duke@1: * directly, but should call the portable wrapper method
duke@1: * {@link javax.rmi.PortableRemoteObject#connect}.
duke@1: * @param orb the ORB to connect to.
duke@1: * @exception RemoteException if the stub is already connected to a different
duke@1: * ORB, or if the stub does not represent an exported remote or local object.
duke@1: */
duke@1: public void connect(ORB orb) throws RemoteException {
duke@1:
duke@1: if (stubDelegate == null) {
duke@1: setDefaultDelegate();
duke@1: }
duke@1:
duke@1: if (stubDelegate != null) {
duke@1: stubDelegate.connect(this, orb);
duke@1: }
duke@1:
duke@1: }
duke@1:
duke@1: /**
duke@1: * Serialization method to restore the IOR state.
duke@1: */
duke@1: private void readObject(java.io.ObjectInputStream stream)
duke@1: throws IOException, ClassNotFoundException {
duke@1:
duke@1: if (stubDelegate == null) {
duke@1: setDefaultDelegate();
duke@1: }
duke@1:
duke@1: if (stubDelegate != null) {
duke@1: stubDelegate.readObject(this, stream);
duke@1: }
duke@1:
duke@1: }
duke@1:
duke@1: /**
duke@1: * Serialization method to save the IOR state.
duke@1: * @serialData The length of the IOR type ID (int), followed by the IOR type ID
duke@1: * (byte array encoded using ISO8859-1), followed by the number of IOR profiles
duke@1: * (int), followed by the IOR profiles. Each IOR profile is written as a
duke@1: * profile tag (int), followed by the length of the profile data (int), followed
duke@1: * by the profile data (byte array).
duke@1: */
duke@1: private void writeObject(java.io.ObjectOutputStream stream) throws IOException {
duke@1:
duke@1: if (stubDelegate == null) {
duke@1: setDefaultDelegate();
duke@1: }
duke@1:
duke@1: if (stubDelegate != null) {
duke@1: stubDelegate.writeObject(this, stream);
duke@1: }
duke@1: }
duke@1:
duke@1: private void setDefaultDelegate() {
duke@1: if (stubDelegateClass != null) {
duke@1: try {
duke@1: stubDelegate = (javax.rmi.CORBA.StubDelegate) stubDelegateClass.newInstance();
duke@1: } catch (Exception ex) {
duke@1: // what kind of exception to throw
duke@1: // delegate not set therefore it is null and will return default
duke@1: // values
duke@1: }
duke@1: }
duke@1: }
duke@1:
duke@1: // Same code as in PortableRemoteObject. Can not be shared because they
duke@1: // are in different packages and the visibility needs to be package for
duke@1: // security reasons. If you know a better solution how to share this code
duke@1: // then remove it from PortableRemoteObject. Also in Util.java
alanb@533: private static Object createDelegate(String classKey) {
duke@1: String className = (String)
duke@1: AccessController.doPrivileged(new GetPropertyAction(classKey));
duke@1: if (className == null) {
duke@1: Properties props = getORBPropertiesFile();
duke@1: if (props != null) {
duke@1: className = props.getProperty(classKey);
duke@1: }
duke@1: }
duke@1:
duke@1: if (className == null) {
alanb@533: return new com.sun.corba.se.impl.javax.rmi.CORBA.StubDelegateImpl();
duke@1: }
duke@1:
duke@1: try {
duke@1: return loadDelegateClass(className).newInstance();
duke@1: } catch (ClassNotFoundException ex) {
duke@1: INITIALIZE exc = new INITIALIZE( "Cannot instantiate " + className);
duke@1: exc.initCause( ex ) ;
duke@1: throw exc ;
duke@1: } catch (Exception ex) {
duke@1: INITIALIZE exc = new INITIALIZE( "Error while instantiating" + className);
duke@1: exc.initCause( ex ) ;
duke@1: throw exc ;
duke@1: }
duke@1:
duke@1: }
duke@1:
duke@1: private static Class loadDelegateClass( String className ) throws ClassNotFoundException
duke@1: {
duke@1: try {
duke@1: ClassLoader loader = Thread.currentThread().getContextClassLoader();
duke@1: return Class.forName(className, false, loader);
duke@1: } catch (ClassNotFoundException e) {
duke@1: // ignore, then try RMIClassLoader
duke@1: }
duke@1:
duke@1: try {
duke@1: return RMIClassLoader.loadClass(className);
duke@1: } catch (MalformedURLException e) {
duke@1: String msg = "Could not load " + className + ": " + e.toString();
duke@1: ClassNotFoundException exc = new ClassNotFoundException( msg ) ;
duke@1: throw exc ;
duke@1: }
duke@1: }
duke@1:
duke@1: /**
duke@1: * Load the orb.properties file.
duke@1: */
duke@1: private static Properties getORBPropertiesFile () {
duke@1: return (Properties) AccessController.doPrivileged(new GetORBPropertiesFileAction());
duke@1: }
duke@1:
duke@1: }