| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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); |
| } |
| |
| } |