/**
* Redistribution and use of this software and associated documentation
* ("Software"), with or without modification, are permitted provided
* that the following conditions are met:
*
* 1. Redistributions of source code must retain copyright
* statements and notices. Redistributions must also contain a
* copy of this document.
*
* 2. Redistributions in binary form must reproduce the
* above copyright notice, this list of conditions and the
* following disclaimer in the documentation and/or other
* materials provided with the distribution.
*
* 3. The name "Exolab" must not be used to endorse or promote
* products derived from this Software without prior written
* permission of Exoffice Technologies. For written permission,
* please contact info@exolab.org.
*
* 4. Products derived from this Software may not be called "Exolab"
* nor may "Exolab" appear in their names without prior written
* permission of Exoffice Technologies. Exolab is a registered
* trademark of Exoffice Technologies.
*
* 5. Due credit should be given to the Exolab Project
* (http://www.exolab.org/).
*
* THIS SOFTWARE IS PROVIDED BY EXOFFICE TECHNOLOGIES AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
* NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
* EXOFFICE TECHNOLOGIES OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Copyright 2003-2005 (C) Exoffice Technologies Inc. All Rights Reserved.
*
* $Id: ObjectRef.java,v 1.2 2005/11/16 12:32:49 tanderson Exp $
*/
package org.exolab.jms.net.orb;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.rmi.NoSuchObjectException;
import java.rmi.server.ExportException;
import java.rmi.server.ObjID;
import java.util.HashMap;
import org.exolab.jms.net.proxy.Delegate;
import org.exolab.jms.net.proxy.Proxy;
import org.exolab.jms.net.uri.URI;
/**
* Maintains state information for an exported object.
*
* @author <a href="mailto:tma@netspace.net.au">Tim Anderson</a>
* @version $Revision: 1.2 $ $Date: 2005/11/16 12:32:49 $
*/
class ObjectRef {
/**
* The identity of the object.
*/
private ObjID _objID;
/**
* The exported object.
*/
private Object _object;
/**
* The proxy class of the exported object, implementing the {@link Proxy}
* interface.
*/
private Class _proxyClass;
/**
* The set of {@link UnicastDelegate} instances, keyed on URI.
*/
private HashMap _proxies = new HashMap();
/**
* Helper for Proxy constructor resolution.
*/
private static final Class[] PROXY_ARGS = new Class[]{Delegate.class};
/**
* Construct a new <code>ObjectRef</code>.
*
* @param objID the object identity
* @param object the exported object
* @param proxyClass the proxy class of the exported object, implementing
* the {@link Proxy} interface
*/
public ObjectRef(ObjID objID, Object object, Class proxyClass) {
_objID = objID;
_object = object;
_proxyClass = proxyClass;
}
/**
* Returns the identity of the exported object.
*
* @return the object identity
*/
public ObjID getObjID() {
return _objID;
}
/**
* Returns the exported object.
*
* @return the exported object
*/
public Object getObject() {
return _object;
}
/**
* Returns the proxy class of the exported object. This implements the
* {@link Proxy} interface.
*
* @return the proxy class
*/
public Class getProxyClass() {
return _proxyClass;
}
/**
* Add a proxy for the object.
*
* @param uri the connection URI
* @return a proxy for the object
* @throws ExportException if the proxy can't be constructed
*/
public synchronized Proxy addProxy(URI uri) throws ExportException {
Proxy proxy;
try {
Delegate delegate = new UnicastDelegate(_objID, uri.toString());
Constructor constructor = _proxyClass.getConstructor(PROXY_ARGS);
proxy = (Proxy) constructor.newInstance(new Object[]{delegate});
} catch (InvocationTargetException exception) {
if (exception.getTargetException() instanceof Exception) {
Exception nested = (Exception) exception.getTargetException();
throw new ExportException(nested.getMessage(), nested);
} else {
throw new ExportException(exception.getMessage(), exception);
}
} catch (Exception exception) {
throw new ExportException(exception.getMessage(), exception);
}
_proxies.put(uri, proxy);
return proxy;
}
/**
* Returns the proxy for the specified URI.
*
* @param uri the connection URI
* @return a proxy for the object
* @throws NoSuchObjectException if the object isn't exported on the
* specified URI
*/
public synchronized Proxy getProxy(URI uri)
throws NoSuchObjectException {
Proxy proxy = (Proxy) _proxies.get(uri);
if (proxy == null) {
throw new NoSuchObjectException(
"Object not exported on URI=" + uri);
}
return proxy;
}
/**
* Returns a list of URIs that the object is exported on.
*
* @return a list of URIs that the object is exported on
*/
public synchronized URI[] getURIs() {
return (URI[]) _proxies.keySet().toArray(new URI[0]);
}
/**
* Determines if this equals another object.
*
* @param object the object to compare
* @return <code>true</code> if this is equal, otherwise <code>false</code>
*/
public boolean equals(Object object) {
boolean equal = (this == object);
if (!equal && (object instanceof ObjectRef)) {
equal = _objID.equals(((ObjectRef) object)._objID);
}
return equal;
}
/**
* Returns the hash code of this.
*
* @return the hash code of this
*/
public int hashCode() {
return _objID.hashCode();
}
}