| /* |
| * Copyright 2014-present Open Networking Laboratory |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.onlab.osgi; |
| |
| import org.osgi.framework.BundleContext; |
| import org.osgi.framework.FrameworkUtil; |
| import org.osgi.framework.ServiceReference; |
| |
| /** |
| * Default implementation of the service directory using OSGi framework utilities. |
| */ |
| public class DefaultServiceDirectory implements ServiceDirectory { |
| |
| /** |
| * Returns the reference to the implementation of the specified service. |
| * |
| * @param serviceClass service class |
| * @param <T> type of service |
| * @return service implementation |
| */ |
| public static <T> T getService(Class<T> serviceClass) { |
| BundleContext bc = FrameworkUtil.getBundle(serviceClass).getBundleContext(); |
| if (bc != null) { |
| ServiceReference<T> reference = bc.getServiceReference(serviceClass); |
| if (reference != null) { |
| T impl = bc.getService(reference); |
| if (impl != null) { |
| return impl; |
| } |
| } |
| } |
| throw new ServiceNotFoundException("Service " + serviceClass.getName() + " not found"); |
| } |
| |
| @Override |
| public <T> T get(Class<T> serviceClass) { |
| return getService(serviceClass); |
| } |
| |
| } |