| /******************************************************************************* |
| * Copyright (c) 2005, 2006 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.equinox.ds.service; |
| |
| import java.util.*; |
| import org.eclipse.equinox.ds.Activator; |
| import org.eclipse.equinox.ds.model.ComponentConfiguration; |
| import org.osgi.service.component.*; |
| |
| /** |
| * When a Service Component is declared with the <code>factory</code> attribute |
| * on its <code>component</code> element, the Service Component Runtime will |
| * register a ComponentFactory service to allow new component configurations |
| * to be created and activated. |
| * |
| * @version $Revision: 1.4 $ |
| */ |
| public class ComponentFactoryImpl implements ComponentFactory { |
| |
| private ComponentConfiguration componentConfiguration; |
| private Activator main; |
| |
| /** |
| * ComponentFactoryImpl |
| * |
| * @param context the SC bundle context |
| * @param componentDescriptionProp the ComponentDescription Object with |
| * Properties |
| * @param buildDispose |
| */ |
| public ComponentFactoryImpl(ComponentConfiguration componentConfiguration, Activator main) { |
| this.componentConfiguration = componentConfiguration; |
| this.main = main; |
| } |
| |
| /** |
| * Create and activate a new component configuration. Additional properties |
| * may be provided for the component configuration. |
| * |
| * @param newProperties Additional properties for the component configuration. |
| * @return A ComponentInstance object encapsulating an instance of the |
| * component configuration. The returned Component Configuration |
| * instance has been activated and, if the Service Component |
| * specifies a <code>service</code> element, the Component |
| * Configuration has been registered as a service. |
| * @throws ComponentException If the Service Component Runtime is unable to |
| * activate the Component Configuration instance. |
| */ |
| public ComponentInstance newInstance(Dictionary newProperties) { |
| |
| // merge properties |
| Hashtable properties = componentConfiguration.getProperties(); |
| if (newProperties != null) { |
| properties = (Hashtable) properties.clone(); |
| Enumeration propsEnum = newProperties.keys(); |
| while (propsEnum.hasMoreElements()) { |
| Object key = propsEnum.nextElement(); |
| properties.put(key, newProperties.get(key)); |
| } |
| } |
| |
| // create a new componentConfiguration (adds to resolver enabledComponentConfigurations list) |
| ComponentConfiguration newComponentConfiguration = main.resolver.mapFactoryInstance(componentConfiguration.getComponentDescription(), properties); |
| |
| // try to resolve new componentConfiguration - adds to resolver's satisfied list |
| if (!main.resolver.justResolve(newComponentConfiguration)) { |
| main.resolver.enabledComponentConfigurations.remove(newComponentConfiguration); // was added by |
| // mapFactoryInstance |
| throw new ComponentException("Could not resolve instance of " + componentConfiguration + " with properties " + properties); |
| } |
| |
| // if new componentConfiguration resolves, send it to instance process (will register |
| // service |
| // if it has one) |
| main.resolver.instanceProcess.registerComponentConfigurations(Collections.singletonList(newComponentConfiguration)); |
| |
| // Instance process will have created an instance |
| |
| return (ComponentInstance) newComponentConfiguration.getInstances().get(0); |
| } |
| } |