| /* |
| * Copyright (c) 1998, 2004, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package java.beans.beancontext; |
| |
| import java.util.Iterator; |
| |
| /** |
| * <p> |
| * One of the primary functions of a BeanContext is to act a as rendezvous |
| * between JavaBeans, and BeanContextServiceProviders. |
| * </p> |
| * <p> |
| * A JavaBean nested within a BeanContext, may ask that BeanContext to |
| * provide an instance of a "service", based upon a reference to a Java |
| * Class object that represents that service. |
| * </p> |
| * <p> |
| * If such a service has been registered with the context, or one of its |
| * nesting context's, in the case where a context delegate to its context |
| * to satisfy a service request, then the BeanContextServiceProvider associated with |
| * the service is asked to provide an instance of that service. |
| * </p> |
| * <p> |
| * The ServcieProvider may always return the same instance, or it may |
| * construct a new instance for each request. |
| * </p> |
| */ |
| |
| public interface BeanContextServiceProvider { |
| |
| /** |
| * Invoked by <code>BeanContextServices</code>, this method |
| * requests an instance of a |
| * service from this <code>BeanContextServiceProvider</code>. |
| * |
| * @param bcs The <code>BeanContextServices</code> associated with this |
| * particular request. This parameter enables the |
| * <code>BeanContextServiceProvider</code> to distinguish service |
| * requests from multiple sources. |
| * |
| * @param requestor The object requesting the service |
| * |
| * @param serviceClass The service requested |
| * |
| * @param serviceSelector the service dependent parameter |
| * for a particular service, or <code>null</code> if not applicable. |
| * |
| * @return a reference to the requested service |
| */ |
| Object getService(BeanContextServices bcs, Object requestor, Class serviceClass, Object serviceSelector); |
| |
| /** |
| * Invoked by <code>BeanContextServices</code>, |
| * this method releases a nested <code>BeanContextChild</code>'s |
| * (or any arbitrary object associated with a |
| * <code>BeanContextChild</code>) reference to the specified service. |
| * |
| * @param bcs the <code>BeanContextServices</code> associated with this |
| * particular release request |
| * |
| * @param requestor the object requesting the service to be released |
| * |
| * @param service the service that is to be released |
| */ |
| public void releaseService(BeanContextServices bcs, Object requestor, Object service); |
| |
| /** |
| * Invoked by <code>BeanContextServices</code>, this method |
| * gets the current service selectors for the specified service. |
| * A service selector is a service specific parameter, |
| * typical examples of which could include: a |
| * parameter to a constructor for the service implementation class, |
| * a value for a particular service's property, or a key into a |
| * map of existing implementations. |
| * |
| * @param bcs the <code>BeanContextServices</code> for this request |
| * @param serviceClass the specified service |
| * @return the current service selectors for the specified serviceClass |
| */ |
| Iterator getCurrentServiceSelectors(BeanContextServices bcs, Class serviceClass); |
| } |