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/*
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* Copyright (c) 2009, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package com.sun.jmx.remote.internal;
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import java.util.Properties;
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import java.rmi.Remote;
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import java.rmi.RemoteException;
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import java.rmi.NoSuchObjectException;
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import java.util.Properties;
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import java.rmi.Remote;
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import java.rmi.RemoteException;
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import java.rmi.NoSuchObjectException;
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import java.security.AccessController;
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import java.security.PrivilegedAction;
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/**
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* A helper class for RMI-IIOP and CORBA APIs.
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*/
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public final class IIOPHelper {
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private IIOPHelper() { }
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// loads IIOPProxy implementation class if available
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private static final String IMPL_CLASS =
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"com.sun.jmx.remote.protocol.iiop.IIOPProxyImpl";
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private static final IIOPProxy proxy =
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AccessController.doPrivileged(new PrivilegedAction<IIOPProxy>() {
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public IIOPProxy run() {
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try {
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Class<?> c = Class.forName(IMPL_CLASS, true, null);
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return (IIOPProxy)c.newInstance();
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} catch (ClassNotFoundException cnf) {
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return null;
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} catch (InstantiationException e) {
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throw new AssertionError(e);
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} catch (IllegalAccessException e) {
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throw new AssertionError(e);
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}
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}});
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/**
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* Returns true if RMI-IIOP and CORBA is available.
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*/
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public static boolean isAvailable() {
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return proxy != null;
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}
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private static void ensureAvailable() {
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if (proxy == null)
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throw new AssertionError("Should not here");
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}
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/**
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* Returns true if the given object is a Stub.
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*/
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public static boolean isStub(Object obj) {
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return (proxy == null) ? false : proxy.isStub(obj);
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}
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/**
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* Returns the Delegate to which the given Stub delegates.
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*/
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public static Object getDelegate(Object stub) {
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ensureAvailable();
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return proxy.getDelegate(stub);
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}
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/**
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* Sets the Delegate for a given Stub.
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*/
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public static void setDelegate(Object stub, Object delegate) {
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ensureAvailable();
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proxy.setDelegate(stub, delegate);
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}
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/**
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* Returns the ORB associated with the given stub
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*
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* @throws UnsupportedOperationException
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* if the object does not support the operation that
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* was invoked
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*/
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public static Object getOrb(Object stub) {
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ensureAvailable();
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return proxy.getOrb(stub);
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}
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/**
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* Connects the Stub to the given ORB.
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*/
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public static void connect(Object stub, Object orb)
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throws RemoteException
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{
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ensureAvailable();
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proxy.connect(stub, orb);
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}
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/**
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* Returns true if the given object is an ORB.
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*/
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public static boolean isOrb(Object obj) {
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ensureAvailable();
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return proxy.isOrb(obj);
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}
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/**
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* Creates, and returns, a new ORB instance.
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*/
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public static Object createOrb(String[] args, Properties props) {
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ensureAvailable();
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return proxy.createOrb(args, props);
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}
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/**
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* Converts a string, produced by the object_to_string method, back
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* to a CORBA object reference.
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*/
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public static Object stringToObject(Object orb, String str) {
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ensureAvailable();
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return proxy.stringToObject(orb, str);
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}
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/**
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* Converts the given CORBA object reference to a string.
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*/
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public static String objectToString(Object orb, Object obj) {
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ensureAvailable();
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return proxy.objectToString(orb, obj);
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}
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/**
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* Checks to ensure that an object of a remote or abstract interface
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* type can be cast to a desired type.
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*/
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public static <T> T narrow(Object narrowFrom, Class<T> narrowTo) {
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ensureAvailable();
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return proxy.narrow(narrowFrom, narrowTo);
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}
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/**
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* Makes a server object ready to receive remote calls
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*/
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public static void exportObject(Remote obj) throws RemoteException {
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ensureAvailable();
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proxy.exportObject(obj);
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}
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/**
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* Deregisters a server object from the runtime.
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*/
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public static void unexportObject(Remote obj) throws NoSuchObjectException {
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ensureAvailable();
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proxy.unexportObject(obj);
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}
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/**
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* Returns a stub for the given server object.
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*/
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public static Remote toStub(Remote obj) throws NoSuchObjectException {
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ensureAvailable();
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return proxy.toStub(obj);
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}
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}
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