Mercurial > hg > release > thermostat-1.0
view common/core/src/main/java/com/redhat/thermostat/common/ThermostatExtensionRegistry.java @ 1412:a0592d702416
Update copyright year in release branch.
reviewed-by: neugens
review-thread: http://icedtea.classpath.org/pipermail/thermostat/2014-June/009965.html
PR1821
author | Jon VanAlten <jon.vanalten@redhat.com> |
---|---|
date | Tue, 03 Jun 2014 11:55:56 -0600 |
parents | ccac9bcabaa0 |
children |
line wrap: on
line source
/* * Copyright 2012-2014 Red Hat, Inc. * * This file is part of Thermostat. * * Thermostat is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published * by the Free Software Foundation; either version 2, or (at your * option) any later version. * * Thermostat 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 * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with Thermostat; see the file COPYING. If not see * <http://www.gnu.org/licenses/>. * * Linking this code with other modules is making a combined work * based on this code. Thus, the terms and conditions of the GNU * General Public License cover the whole combination. * * As a special exception, the copyright holders of this code give * you permission to link this code with independent modules to * produce an executable, regardless of the license terms of these * independent modules, and to copy and distribute the resulting * executable under terms of your choice, provided that you also * meet, for each linked independent module, the terms and conditions * of the license of that module. An independent module is a module * which is not derived from or based on this code. If you modify * this code, you may extend this exception to your version of the * library, but you are not obligated to do so. If you do not wish * to do so, delete this exception statement from your version. */ package com.redhat.thermostat.common; import org.osgi.framework.BundleContext; import org.osgi.framework.FrameworkUtil; import org.osgi.framework.InvalidSyntaxException; import org.osgi.framework.ServiceReference; import org.osgi.util.tracker.ServiceTracker; /** * A helper class to make it easier to implement registeries for osgi-services. */ public class ThermostatExtensionRegistry<E> { public enum Action { SERVICE_ADDED, SERVICE_REMOVED } private ActionNotifier<Action> actionNotifier = new ActionNotifier<>(this); @SuppressWarnings("rawtypes") private ServiceTracker tracker; @SuppressWarnings({ "unchecked", "rawtypes" }) public ThermostatExtensionRegistry(BundleContext context, String filter, final Class<E> classType) throws InvalidSyntaxException { tracker = new ServiceTracker(context, FrameworkUtil.createFilter(filter), null) { @Override public Object addingService(ServiceReference reference) { E service = (E) super.addingService(reference); actionNotifier.fireAction(Action.SERVICE_ADDED, service); return service; } @Override public void removedService(ServiceReference reference, Object service) { if (!classType.isAssignableFrom(service.getClass())) { throw new AssertionError("removing a service of not matching type."); } actionNotifier.fireAction(Action.SERVICE_REMOVED, service); super.removedService(reference, service); } }; } public void start() { tracker.open(); } public void stop() { tracker.close(); } public void addActionListener(ActionListener<Action> l) { actionNotifier.addActionListener(l); } public void removeActionListener(ActionListener<Action> l) { actionNotifier.removeActionListener(l); } }