| /* |
| * 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.apache.opennlp.tagging_server; |
| |
| import org.osgi.framework.Bundle; |
| import org.osgi.framework.BundleContext; |
| import org.osgi.framework.FrameworkUtil; |
| import org.osgi.framework.InvalidSyntaxException; |
| import org.osgi.framework.ServiceReference; |
| |
| public class ServiceUtil { |
| |
| private ServiceUtil() { |
| } |
| |
| |
| |
| |
| public static ServiceReference getModelServiceReference( |
| Class<?> serviceClazz, String modelName) { |
| |
| String filter = "(&(objectClass=" + serviceClazz.getName() + ")(MODEL_NAME=" + modelName + "))"; |
| |
| Bundle bundle = FrameworkUtil.getBundle(ServiceUtil.class); |
| BundleContext context = bundle.getBundleContext(); |
| |
| ServiceReference[] serviceReferences; |
| try { |
| serviceReferences = context.getServiceReferences( |
| null, filter); |
| } catch (InvalidSyntaxException e) { |
| throw new IllegalArgumentException("modelName can't be used as value in filter!", e); |
| } |
| |
| if (serviceReferences != null && serviceReferences.length > 0) { |
| return serviceReferences[0]; |
| } |
| else { |
| return null; |
| } |
| } |
| |
| public static ServiceReference getServiceReference(Class<?> serviceClazz) { |
| Bundle bundle = FrameworkUtil.getBundle(ServiceUtil.class); |
| BundleContext context = bundle.getBundleContext(); |
| |
| return context.getServiceReference(serviceClazz.getName()); |
| } |
| |
| @SuppressWarnings("unchecked") |
| public static <T> T getService(ServiceReference modelService, Class<T> modelClazz) { |
| |
| T model; |
| if (modelService != null) { |
| BundleContext context = modelService.getBundle().getBundleContext(); |
| model = (T) context.getService(modelService); |
| } |
| else { |
| throw new RuntimeException("Model does not exist!"); |
| } |
| |
| return model; |
| } |
| |
| public static void releaseService(ServiceReference service) { |
| if (service != null) { |
| BundleContext context = service.getBundle().getBundleContext(); |
| context.ungetService(service); |
| } |
| } |
| } |