| /* |
| * 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.felix.dm.impl; |
| |
| import java.util.Dictionary; |
| import java.util.Enumeration; |
| import java.util.List; |
| import java.util.Properties; |
| |
| import org.apache.felix.dm.DependencyManager; |
| import org.apache.felix.dm.service.Service; |
| import org.osgi.framework.Constants; |
| import org.osgi.framework.ServiceReference; |
| |
| public class AspectImpl extends AbstractDecorator { |
| private volatile Service m_service; |
| private final Class m_serviceInterface; |
| private final String m_serviceFilter; |
| private final Object m_aspectImplementation; |
| private final Dictionary m_aspectProperties; |
| private final Object m_factory; |
| private final String m_factoryCreateMethod; |
| private final int m_ranking; |
| private final String m_attributeName; |
| |
| public AspectImpl(Class serviceInterface, String serviceFilter, int ranking, Object aspectImplementation, Dictionary properties) { |
| m_serviceInterface = serviceInterface; |
| m_serviceFilter = serviceFilter; |
| m_aspectImplementation = aspectImplementation; |
| m_aspectProperties = properties; |
| m_factory = null; |
| m_factoryCreateMethod = null; |
| m_ranking = ranking; |
| m_attributeName = null; |
| } |
| |
| public AspectImpl(Class serviceInterface, String serviceFilter, int ranking, Object factory, String factoryCreateMethod, Dictionary properties) { |
| m_serviceInterface = serviceInterface; |
| m_serviceFilter = serviceFilter; |
| m_factory = factory; |
| m_factoryCreateMethod = factoryCreateMethod; |
| m_aspectProperties = properties; |
| m_aspectImplementation = null; |
| m_ranking = ranking; |
| m_attributeName = null; |
| } |
| |
| public AspectImpl(Class serviceInterface, String serviceFilter, int ranking, Object factory, String factoryCreateMethod, String attributeName, Dictionary properties) { |
| m_serviceInterface = serviceInterface; |
| m_serviceFilter = serviceFilter; |
| m_factory = factory; |
| m_factoryCreateMethod = factoryCreateMethod; |
| m_attributeName = attributeName; |
| m_aspectProperties = properties; |
| m_aspectImplementation = null; |
| m_ranking = ranking; |
| } |
| |
| public Service createService(Object[] properties) { |
| ServiceReference ref = (ServiceReference) properties[0]; |
| Object service = properties[1]; |
| Properties props = new Properties(); |
| // first add our aspect property |
| props.put(DependencyManager.ASPECT, ref.getProperty(Constants.SERVICE_ID)); |
| // and the ranking |
| props.put(Constants.SERVICE_RANKING, Integer.valueOf(m_ranking)); |
| String[] keys = ref.getPropertyKeys(); |
| for (int i = 0; i < keys.length; i++) { |
| props.put(keys[i], ref.getProperty(keys[i])); |
| } |
| if (m_aspectProperties != null) { |
| Enumeration e = m_aspectProperties.keys(); |
| while (e.hasMoreElements()) { |
| Object key = e.nextElement(); |
| props.put(key, m_aspectProperties.get(key)); |
| } |
| } |
| List dependencies = m_service.getDependencies(); |
| dependencies.remove(0); |
| if (m_aspectImplementation == null) { |
| if (m_attributeName == null) { |
| return m_manager.createService() |
| .setInterface(m_serviceInterface.getName(), props) |
| .setFactory(m_factory, m_factoryCreateMethod) |
| .add(dependencies) |
| .add(m_manager.createServiceDependency() |
| .setService(m_serviceInterface, createAspectFilter(m_serviceFilter)) |
| .setRequired(true)); |
| } |
| else { |
| return m_manager.createService() |
| .setInterface(m_serviceInterface.getName(), props) |
| .setFactory(m_factory, m_factoryCreateMethod) |
| .add(dependencies) |
| .add(m_manager.createServiceDependency() |
| .setService(m_serviceInterface, createAspectFilter(m_serviceFilter)) |
| .setAutoConfig(m_attributeName) |
| .setRequired(true)); |
| } |
| } |
| else { |
| return m_manager.createService() |
| .setInterface(m_serviceInterface.getName(), props) |
| .setImplementation(m_aspectImplementation) |
| .add(dependencies) |
| .add(m_manager.createServiceDependency() |
| .setService(m_serviceInterface, createAspectFilter(m_serviceFilter)) |
| .setRequired(true)); |
| } |
| } |
| private String createAspectFilter(String filter) { |
| if (filter == null || filter.length() == 0) { |
| return "(|(!(" + Constants.SERVICE_RANKING + "=*))(" + Constants.SERVICE_RANKING + "<=" + (m_ranking - 1) + "))"; |
| } |
| else { |
| return "(&(|(!(" + Constants.SERVICE_RANKING + "=*))(" + Constants.SERVICE_RANKING + "<=" + (m_ranking - 1) + "))" + filter + ")"; |
| } |
| } |
| } |