EDPUtils.java

/*******************************************************************************
 * Copyright (c) 2012 Olivier Moises
 *
 * 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:
 *   Olivier Moises- initial API and implementation
 *******************************************************************************/

package org.eclipse.wazaabi.engine.edp;

import org.eclipse.emf.common.notify.Adapter;
import org.eclipse.wazaabi.engine.edp.adapters.EventHandlerAdapter;
import org.eclipse.wazaabi.engine.edp.exceptions.OperationAborted;
import org.eclipse.wazaabi.mm.edp.EventDispatcher;
import org.eclipse.wazaabi.mm.edp.events.Event;
import org.eclipse.wazaabi.mm.edp.handlers.EventHandler;

public class EDPUtils {

	/**
	 * This method throws a given event to the dispatcher.
	 * 
	 * @param dispatcher
	 * @param event
	 */
	public static void throwEvent(EventDispatcher dispatcher, Event event) {
		if (dispatcher == null || event == null || "".equals(event.getId())) //$NON-NLS-1$
			return;
		for (EventHandler eventHandler : dispatcher.getHandlers())
			for (Event listenedEvent : eventHandler.getEvents())
				if (event.getId().equals(listenedEvent.getId()))
					for (Adapter adapter : eventHandler.eAdapters())
						if (adapter instanceof EventHandlerAdapter)
							try {
								((EventHandlerAdapter) adapter).trigger(event);
							} catch (OperationAborted e) {
								// TODO Auto-generated catch block
								e.printStackTrace();
								System.err.println(e.getErrorMessage());
							}

	}

	/**
	 * Returns the (smart) concatenation of the prefix and the relativePath.
	 * 
	 * @param prefix
	 * @param relativePath
	 * @return A normalized URI or null
	 */
	public static String normalizeURI(String prefix, String relativePath) {
		if (prefix == null)
			return relativePath;
		if (relativePath == null)
			return prefix;
		if (relativePath.startsWith(prefix)) //$NON-NLS-1$
			return relativePath;
		if (!relativePath.startsWith("//")) {
			if (relativePath.startsWith("/")) //$NON-NLS-1$
				relativePath = relativePath.substring(1);
			if (prefix.endsWith("/")) //$NON-NLS-1$
				return prefix + relativePath;
			else if (prefix.startsWith("urn:")) //$NON-NLS-1$
				return prefix + relativePath;
			else
				return prefix + '/' + relativePath;
		}
		return null;
	}
}