Activator.java

/*
 * Copyright 2012 The Solmix Project
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * http://www.gnu.org/licenses/ 
 * or see the FSF site: http://www.fsf.org. 
 */

package org.solmix.sql.internal;

import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleContext;
import org.osgi.service.event.EventAdmin;
import org.osgi.util.tracker.ServiceTracker;

/**
 * 
 * @author solmix.f@gmail.com
 * @version 110035 2011-10-5
 */

public class Activator implements BundleActivator
{

    static BundleContext context;

    static ServiceTracker eaTrack;

    public static BundleContext getContext() {
        return context;
    }

    /**
     * {@inheritDoc}
     * 
     * @see org.osgi.framework.BundleActivator#start(org.osgi.framework.BundleContext)
     */
    @Override
    public void start(BundleContext context) throws Exception {
        Activator.context = context;
        eaTrack = new ServiceTracker(context, EventAdmin.class.getName(), null);
        eaTrack.open();
    }

    public static EventAdmin getEventAdmin() {
        return eaTrack == null ? null : (EventAdmin) eaTrack.getService();
    }

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

    }

}