content: /*
   * Copyright (c) OSGi Alliance (2008, 2009). All Rights Reserved.
   *
   * Licensed 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.osgi.service.blueprint.reflect;
  
  /**
   * Metadata for a registration listener interested in service registration and
   * unregistration events for a service.
   * 
   * <p>
   * The registration listener is called with the initial state of the service
   * when the registration listener is actuated.
   * 
   * @ThreadSafe
   * @version $Revision$
   */
  public interface RegistrationListener {
  
  	/**
  	 * Return the Metadata for the component that will receive registration and
  	 * unregistration events.
  	 * 
  	 * This is specified by the <code>ref</code> attribute or via an inlined
  	 * component.
  	 * 
  	 * @return The Metadata for the component that will receive registration and
  	 *         unregistration events.
  	 */
  	Target getListenerComponent();
  
  	/**
  	 * Return the name of the registration method. The registration method will
  	 * be invoked when the associated service is registered with the service
  	 * registry.
  	 * 
  	 * This is specified by the <code>registration-method</code> attribute of
  	 * the registration listener.
  	 * 
  	 * @return The name of the registration method.
  	 */
  	String getRegistrationMethod();
  
  	/**
  	 * Return the name of the unregistration method. The unregistration method
  	 * will be invoked when the associated service is unregistered from the
  	 * service registry.
  	 * 
  	 * This is specified by the <code>unregistration-method</code> attribute of
  	 * the registration listener.
  	 * 
  	 * @return The name of the unregistration method.
  	 */
  	String getUnregistrationMethod();
  }
  