| /* |
| * 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.Enumeration; |
| import java.util.List; |
| import java.util.Properties; |
| |
| import org.apache.felix.dm.Component; |
| import org.apache.felix.dm.ComponentStateListener; |
| import org.apache.felix.dm.Dependency; |
| import org.apache.felix.dm.DependencyManager; |
| import org.apache.felix.dm.ServiceDependency; |
| import org.osgi.framework.Constants; |
| import org.osgi.framework.ServiceReference; |
| |
| /** |
| * Adapter Service implementation. This class extends the FilterService in order to catch |
| * some Service methods for configuring actual adapter service implementation. |
| * |
| * @author <a href="mailto:dev@felix.apache.org">Felix Project Team</a> |
| */ |
| public class AdapterServiceImpl extends FilterService { |
| /** |
| * Creates a new Adapter Service implementation. |
| * |
| * @param dm the dependency manager used to create our internal adapter service |
| * @param adapteeInterface the service interface to apply the adapter to |
| * @param adapteeFilter the filter condition to use with the service interface |
| * @param add |
| * @param change |
| * @param remove |
| */ |
| public AdapterServiceImpl(DependencyManager dm, Class adapteeInterface, String adapteeFilter, String autoConfig, String add, String change, String remove, String swap) { |
| super(dm.createComponent()); // This service will be filtered by our super class, allowing us to take control. |
| m_component.setImplementation(new AdapterImpl(adapteeInterface, adapteeFilter, autoConfig, add, change, remove, swap)) |
| .add(dm.createServiceDependency() |
| .setService(adapteeInterface, adapteeFilter) |
| .setAutoConfig(false) |
| .setCallbacks("added", null, "removed", "swapped")) |
| .setCallbacks("init", null, "stop", null); |
| } |
| |
| public AdapterServiceImpl(DependencyManager dm, Class adapteeInterface, String adapteeFilter, String autoConfig, String add, String change, String remove) { |
| super(dm.createComponent()); // This service will be filtered by our super class, allowing us to take control. |
| m_component.setImplementation(new AdapterImpl(adapteeInterface, adapteeFilter, autoConfig, add, change, remove, null)) |
| .add(dm.createServiceDependency() |
| .setService(adapteeInterface, adapteeFilter) |
| .setAutoConfig(false) |
| .setCallbacks("added", null, "removed", "swapped")) |
| .setCallbacks("init", null, "stop", null); |
| } |
| |
| public class AdapterImpl extends AbstractDecorator { |
| private final Class m_adapteeInterface; |
| private final String m_adapteeFilter; |
| private final String m_add; |
| private final String m_change; |
| private final String m_remove; |
| private final String m_swap; |
| private final String m_autoConfig; |
| |
| public AdapterImpl(Class adapteeInterface, String adapteeFilter, String autoConfig, String add, String change, String remove, String swap) { |
| m_adapteeInterface = adapteeInterface; |
| m_adapteeFilter = adapteeFilter; |
| m_autoConfig = autoConfig; |
| m_add = add; |
| m_change = change; |
| m_swap = swap; |
| m_remove = remove; |
| } |
| |
| public Component createService(Object[] properties) { |
| ServiceReference ref = (ServiceReference) properties[0]; |
| Properties props = new Properties(); |
| String[] keys = ref.getPropertyKeys(); |
| String serviceIdToTrack = null; |
| for (int i = 0; i < keys.length; i++) { |
| String key = keys[i]; |
| if (key.equals(DependencyManager.ASPECT)) { |
| // if we're handed an aspect fetch the aspect property as the service id to track, but do not copy it |
| serviceIdToTrack = ref.getProperty(key).toString(); |
| } |
| if (key.equals(DependencyManager.ASPECT) || key.equals(Constants.SERVICE_ID) || key.equals(Constants.SERVICE_RANKING) || key.equals(Constants.OBJECTCLASS)) { |
| // do not copy these either |
| } |
| else { |
| props.put(key, ref.getProperty(key)); |
| } |
| } |
| if (serviceIdToTrack == null) { |
| // we're not handed an aspect so we can use the service id to track |
| serviceIdToTrack = ref.getProperty(Constants.SERVICE_ID).toString(); |
| } |
| if (m_serviceProperties != null) { |
| Enumeration e = m_serviceProperties.keys(); |
| while (e.hasMoreElements()) { |
| Object key = e.nextElement(); |
| props.put(key, m_serviceProperties.get(key)); |
| } |
| } |
| List dependencies = m_component.getDependencies(); |
| dependencies.remove(0); |
| ServiceDependency dependency = m_manager.createServiceDependency() |
| // create a dependency on both the service id we're adapting and possible aspects for this given service id |
| .setService(m_adapteeInterface, "(|(" + Constants.SERVICE_ID + "=" + serviceIdToTrack |
| + ")(" + DependencyManager.ASPECT + "=" + serviceIdToTrack + "))") |
| .setRequired(true); |
| if (m_autoConfig != null) { |
| dependency.setAutoConfig(m_autoConfig); |
| } |
| if (m_add != null || m_change != null || m_remove != null || m_swap != null) { |
| dependency.setCallbacks(m_add, m_change, m_remove, m_swap); |
| } |
| |
| Component service = m_manager.createComponent() |
| .setInterface(m_serviceInterfaces, props) |
| .setImplementation(m_serviceImpl) |
| .setFactory(m_factory, m_factoryCreateMethod) // if not set, no effect |
| .setComposition(m_compositionInstance, m_compositionMethod) // if not set, no effect |
| .setCallbacks(m_callbackObject, m_init, m_start, m_stop, m_destroy) // if not set, no effect |
| .add(dependency); |
| |
| configureAutoConfigState(service, m_component); |
| |
| for (int i = 0; i < dependencies.size(); i++) { |
| service.add(((Dependency) dependencies.get(i)).createCopy()); |
| } |
| |
| for (int i = 0; i < m_stateListeners.size(); i ++) { |
| service.addStateListener((ComponentStateListener) m_stateListeners.get(i)); |
| } |
| return service; |
| } |
| public String toString() { |
| return "Adapter for " + m_adapteeInterface + ((m_adapteeFilter != null) ? " with filter " + m_adapteeFilter : ""); |
| } |
| } |
| } |