bundles/org.eclipse.equinox.event/src/org/eclipsei/equinox/event/mapper/ServiceEventAdapter.java

/*******************************************************************************
 * Copyright (c) 2005 IBM Corporation.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/

package org.eclipsei.equinox.event.mapper;

import java.util.Hashtable;
import org.osgi.framework.ServiceEvent;
import org.osgi.framework.ServiceReference;
import org.osgi.service.event.Event;
import org.osgi.service.event.EventAdmin;

/**
 * @version $Revision: 1.4 $
 */
public class ServiceEventAdapter extends EventAdapter {
	// constants for Event topic substring
	public static final String	HEADER			= "org/osgi/framework/ServiceEvent";
	public static final String	UNREGISTERING	= "UNREGISTERING";
	public static final String	MODIFIED		= "MODIFIED";
	public static final String	REGISTERED		= "REGISTERED";
	private ServiceEvent		event;

	public ServiceEventAdapter(ServiceEvent event, EventAdmin eventAdmin) {
		super(eventAdmin);
		this.event = event;
	}

	// override super's method to force syncronous event delivery
	protected void redeliverInternal(Event converted) {
		eventAdmin.sendEvent(converted);
	}

	/**
	 * @return
	 * @see org.eclipse.equinox.event.mapper.EventAdapter#convert()
	 */
	public Event convert() {
		String typename = null;
		switch (event.getType()) {
			case ServiceEvent.REGISTERED :
				typename = REGISTERED;
				break;
			case ServiceEvent.MODIFIED :
				typename = MODIFIED;
				break;
			case ServiceEvent.UNREGISTERING :
				typename = UNREGISTERING;
				break;
			default :
				return null;
		}
		String topic = HEADER + Constants.TOPIC_SEPARATOR + typename;
		Hashtable properties = new Hashtable();
		ServiceReference ref = event.getServiceReference();
		if (ref != null) {
			putServiceReferenceProperties(properties, ref);
		}
		properties.put(Constants.EVENT, event);
		Event converted = new Event(topic, properties);
		return converted;
	}
}