extra/org.eclipse.emf.ecp.application.e4/src/org/eclipse/emf/ecp/e4/application/Activator.java

package org.eclipse.emf.ecp.e4.application;

import org.eclipse.e4.core.contexts.IContextFunction;
import org.eclipse.e4.ui.internal.workbench.E4Workbench;
import org.eclipse.e4.ui.workbench.modeling.EPartService;
import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleContext;
import org.osgi.framework.InvalidSyntaxException;
import org.osgi.framework.ServiceReference;

public class Activator implements BundleActivator {

	private static BundleContext context;

	static BundleContext getContext() {
		return context;
	}

	/*
	 * (non-Javadoc)
	 * @see org.osgi.framework.BundleActivator#start(org.osgi.framework.BundleContext)
	 */
	public void start(BundleContext bundleContext) throws Exception {
		Activator.context = bundleContext;
	}

	/*
	 * (non-Javadoc)
	 * @see org.osgi.framework.BundleActivator#stop(org.osgi.framework.BundleContext)
	 */
	public void stop(BundleContext bundleContext) throws Exception {
		Activator.context = null;
	}

	public static EPartService getEPartService() {
		try {
			final ServiceReference<?> service = context.getServiceReferences(IContextFunction.class.getName(),
				"(service.context.key=" + EPartService.class.getName() + ")")[0];
			// TODO a "bit" ugly
			return (EPartService) ((IContextFunction) context.getService(service)).compute(
				E4Workbench.getServiceContext(), null);
		} catch (final InvalidSyntaxException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return null;
	}

}