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Java example source code file (IIOPProxyImpl.java)

This example Java source code file (IIOPProxyImpl.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

accesscontrolcontext, corba, iiopproxyimpl, nosuchobjectexception, object, override, permissions, protectiondomain, remote, remoteexception, rmi, runtimeexception, security, string, stub_acc, unexpected, unsupportedoperationexception, util

The IIOPProxyImpl.java Java example source code

/*
 * Copyright (c) 2009,2013, 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.
 */

package com.sun.jmx.remote.protocol.iiop;

import org.omg.CORBA.ORB;
import org.omg.CORBA.portable.Delegate;
import javax.rmi.PortableRemoteObject;
import javax.rmi.CORBA.Stub;

import java.util.Properties;
import java.rmi.Remote;
import java.rmi.RemoteException;
import java.rmi.NoSuchObjectException;

import com.sun.jmx.remote.internal.IIOPProxy;
import java.io.SerializablePermission;
import java.security.AccessControlContext;
import java.security.AccessController;
import java.security.Permissions;
import java.security.PrivilegedActionException;
import java.security.PrivilegedExceptionAction;
import java.security.ProtectionDomain;

/**
 * An implementation of IIOPProxy that simply delegates to the appropriate
 * RMI-IIOP and CORBA APIs.
 */

public class IIOPProxyImpl implements IIOPProxy {
    // special ACC used to initialize the IIOP stub
    // the only allowed privilege is SerializablePermission("enableSubclassImplementation")
    private static final AccessControlContext STUB_ACC;

    static {
        Permissions p = new Permissions();
        p.add(new SerializablePermission("enableSubclassImplementation"));
        STUB_ACC = new AccessControlContext(
            new ProtectionDomain[]{
                new ProtectionDomain(null, p)
            }
        );
    }

    public IIOPProxyImpl() { }

    @Override
    public boolean isStub(Object obj) {
        return (obj instanceof Stub);
    }

    @Override
    public Object getDelegate(Object stub) {
        return ((Stub)stub)._get_delegate();
    }

    @Override
    public void setDelegate(Object stub, Object delegate) {
        ((Stub)stub)._set_delegate((Delegate)delegate);
    }

    @Override
    public Object getOrb(Object stub) {
        try {
            return ((Stub)stub)._orb();
        } catch (org.omg.CORBA.BAD_OPERATION x) {
            throw new UnsupportedOperationException(x);
        }
    }

    @Override
    public void connect(Object stub, Object orb)
        throws RemoteException
    {
        ((Stub)stub).connect((ORB)orb);
    }

    @Override
    public boolean isOrb(Object obj) {
        return (obj instanceof ORB);
    }

    @Override
    public Object createOrb(String[] args, Properties props) {
        return ORB.init(args, props);
    }

    @Override
    public Object stringToObject(Object orb, String str) {
        return ((ORB)orb).string_to_object(str);
    }

    @Override
    public String objectToString(Object orb, Object obj) {
        return ((ORB)orb).object_to_string((org.omg.CORBA.Object)obj);
    }

    @Override
    @SuppressWarnings("unchecked")
    public <T> T narrow(Object narrowFrom, Class narrowTo) {
        return (T)PortableRemoteObject.narrow(narrowFrom, narrowTo);
    }

    @Override
    public void exportObject(Remote obj) throws RemoteException {
        PortableRemoteObject.exportObject(obj);
    }

    @Override
    public void unexportObject(Remote obj) throws NoSuchObjectException {
        PortableRemoteObject.unexportObject(obj);
    }

    @Override
    public Remote toStub(final Remote obj) throws NoSuchObjectException {
        if (System.getSecurityManager() == null) {
            return PortableRemoteObject.toStub(obj);
        } else {
            try {
                return AccessController.doPrivileged(new PrivilegedExceptionAction<Remote>() {

                    @Override
                    public Remote run() throws Exception {
                        return PortableRemoteObject.toStub(obj);
                    }
                }, STUB_ACC);
            } catch (PrivilegedActionException e) {
                if (e.getException() instanceof NoSuchObjectException) {
                    throw (NoSuchObjectException)e.getException();
                }
                throw new RuntimeException("Unexpected exception type", e.getException());
            }
        }
    }
}

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