javax.rmi.CORBA.Stub Maven / Gradle / Ivy
/*
* Copyright (c) 1997, 2020 Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 1998-1999 IBM Corp. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0, or the Eclipse Distribution License
* v. 1.0 which is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the Eclipse
* Public License v. 2.0 are satisfied: GNU General Public License v2.0
* w/Classpath exception which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause OR GPL-2.0 WITH
* Classpath-exception-2.0
*/
package javax.rmi.CORBA;
import org.omg.CORBA.ORB;
import org.omg.CORBA.INITIALIZE;
import org.omg.CORBA_2_3.portable.ObjectImpl;
import java.io.IOException;
import java.rmi.RemoteException;
import java.io.File;
import java.io.FileInputStream;
import java.net.MalformedURLException ;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.util.Properties;
import java.rmi.server.RMIClassLoader;
import com.sun.corba.ee.org.omg.CORBA.GetPropertyAction;
/**
* Base class from which all RMI-IIOP stubs must inherit.
*/
public abstract class Stub extends ObjectImpl
implements java.io.Serializable {
private static final long serialVersionUID = 1087775603798577179L;
// This can only be set at object construction time (no sync necessary).
private transient StubDelegate stubDelegate = null;
private static Class stubDelegateClass = null;
private static final String StubClassKey = "javax.rmi.CORBA.StubClass";
private static final String defaultStubImplName = "com.sun.corba.ee.impl.javax.rmi.CORBA.StubDelegateImpl";
static {
Object stubDelegateInstance = (Object) createDelegateIfSpecified(StubClassKey, defaultStubImplName);
if (stubDelegateInstance != null)
stubDelegateClass = stubDelegateInstance.getClass();
}
/**
* 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() {
if (stubDelegate == null) {
setDefaultDelegate();
}
if (stubDelegate != null) {
return stubDelegate.hashCode(this);
}
return 0;
}
/**
* Compares two stubs for equality. Returns true when used to compare stubs
* that represent the same remote object, and false otherwise.
* @param obj the reference object with which to compare.
* @return true if this object is the same as the obj
* argument; false otherwise.
*/
public boolean equals(java.lang.Object obj) {
if (stubDelegate == null) {
setDefaultDelegate();
}
if (stubDelegate != null) {
return stubDelegate.equals(this, obj);
}
return false;
}
/**
* 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() {
if (stubDelegate == null) {
setDefaultDelegate();
}
String ior;
if (stubDelegate != null) {
ior = stubDelegate.toString(this);
if (ior == null) {
return super.toString();
} else {
return ior;
}
}
return super.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(ORB orb) throws RemoteException {
if (stubDelegate == null) {
setDefaultDelegate();
}
if (stubDelegate != null) {
stubDelegate.connect(this, orb);
}
}
/**
* Serialization method to restore the IOR state.
* @param stream stream to read object from
* @throws IOException if there was an error reading from the strea
* @throws ClassNotFoundException if the class that was represented by the steam cannot be found
*/
private void readObject(java.io.ObjectInputStream stream)
throws IOException, ClassNotFoundException {
if (stubDelegate == null) {
setDefaultDelegate();
}
if (stubDelegate != null) {
stubDelegate.readObject(this, stream);
}
}
/**
* Serialization method to save the IOR state.
* @param stream 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).
* @throws IOException if an error occurred writing to the delegated stub
*/
private void writeObject(java.io.ObjectOutputStream stream) throws IOException {
if (stubDelegate == null) {
setDefaultDelegate();
}
if (stubDelegate != null) {
stubDelegate.writeObject(this, stream);
}
}
private void setDefaultDelegate() {
if (stubDelegateClass != null) {
try {
stubDelegate = (javax.rmi.CORBA.StubDelegate) stubDelegateClass.newInstance();
} catch (Exception ex) {
// what kind of exception to throw
// delegate not set therefore it is null and will return default
// values
}
}
}
// Same code as in PortableRemoteObject. Can not be shared because they
// are in different packages and the visibility needs to be package for
// security reasons. If you know a better solution how to share this code
// then remove it from PortableRemoteObject. Also in Util.java
private static Object createDelegateIfSpecified(String classKey,
String defaultClassName) {
String className =
(String)AccessController.doPrivileged(new GetPropertyAction(classKey));
if (className == null) {
Properties props = getORBPropertiesFile();
if (props != null) {
className = props.getProperty(classKey);
}
}
if (className == null) {
className = defaultClassName;
}
try {
return loadDelegateClass(className).newInstance();
} catch (ClassNotFoundException ex) {
INITIALIZE exc = new INITIALIZE( "Cannot instantiate " + className);
exc.initCause( ex ) ;
throw exc ;
} catch (Exception ex) {
INITIALIZE exc = new INITIALIZE( "Error while instantiating" + className);
exc.initCause( ex ) ;
throw exc ;
}
}
private static Class loadDelegateClass( String className ) throws ClassNotFoundException
{
try {
ClassLoader loader = Thread.currentThread().getContextClassLoader();
return Class.forName(className, false, loader);
} catch (ClassNotFoundException e) {
// ignore, then try RMIClassLoader
}
try {
return RMIClassLoader.loadClass(className);
} catch (MalformedURLException e) {
String msg = "Could not load " + className + ": " + e.toString();
ClassNotFoundException exc = new ClassNotFoundException( msg ) ;
throw exc ;
}
}
/**
* Load the orb.properties file.
*/
private static Properties getORBPropertiesFile () {
return (Properties) AccessController.doPrivileged(new GetORBPropertiesFileAction());
}
}