org.eclipse.osbp.utils/src/org/eclipse/osbp/utils/common/ServiceListener.java

/**
 *                                                                            
 * Copyright (c) 2011, 2016 - Loetz GmbH&Co.KG (69115 Heidelberg, Germany)
 *                                                                            
 * All rights reserved. This program and the accompanying materials           
 * are made available under the terms of the Eclipse Public License 2.0        
 * which accompanies this distribution, and is available at                  
 * https://www.eclipse.org/legal/epl-2.0/                                 
 *                                 
 * SPDX-License-Identifier: EPL-2.0                                 
 *                                                                            
 * Contributors:   
 * Christophe Loetz (Loetz GmbH&Co.KG) - initial implementation 
 */
package org.eclipse.osbp.utils.common;

import java.util.HashSet;
import java.util.Set;

import org.eclipse.emf.ecore.EClass;
import org.eclipse.xtext.resource.IEObjectDescription;
import org.eclipse.xtext.resource.XtextResourceSet;

import org.eclipse.osbp.utils.classloader.IEObjectLoader;


public class ServiceListener {
	
	private static final Set<IEObjectLoader> sEObjectLoaderServices = new HashSet<IEObjectLoader>();

	public static XtextResourceSet getConfiguredXtextResourceFor(EClass eClass, String qualifiedName) {
		XtextResourceSet xtextResourceSet = null;
		for	(IEObjectLoader eObjectLoader : sEObjectLoaderServices) {
			xtextResourceSet = eObjectLoader.getConfiguredXtextResourceFor(eClass, qualifiedName);
			if	(xtextResourceSet != null) {
				return xtextResourceSet;
			}
		}
		return null;
	}
	
	public static Iterable<IEObjectDescription> getEObjectDescriptions(EClass eClass, String qualifiedName) {
		Iterable<IEObjectDescription> eObjectDescriptions = null;
		for	(IEObjectLoader eObjectLoader : sEObjectLoaderServices) {
			eObjectDescriptions = eObjectLoader.getEObjectDescriptions(eClass, qualifiedName);
			if	(eObjectDescriptions != null) {
				return eObjectDescriptions;
			}
		}
		return null;
	}

	/**
	 * @param eObjectLoaderService declarative service loaded
	 */
	public static void bindEObjectLoaderService(IEObjectLoader eObjectLoaderService) {
		System.err.println(ServiceListener.class.getCanonicalName()+": "+eObjectLoaderService.getClass().getCanonicalName()+" bound");
		sEObjectLoaderServices.add(eObjectLoaderService);
	}

	/**
	 * @param eObjectLoaderService declarative service unloaded
	 */
	public static void unbindEObjectLoaderService(IEObjectLoader eObjectLoaderService) {
		System.err.println(ServiceListener.class.getCanonicalName()+": "+eObjectLoaderService.getClass().getCanonicalName()+" unbound");
		sEObjectLoaderServices.remove(eObjectLoaderService);
	}

}