| /******************************************************************************* |
| * Copyright (c) 2013 IBM Corporation and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| |
| package org.eclipse.osgi.internal.serviceregistry; |
| |
| /** |
| * Closure to allow sharing the same code for getting and ungetting a service. |
| * The {@link #prototypeConsumer} closure must be used for calls from |
| * ServiceObjects and the {@link #singletonConsumer} closure must be used |
| * for calls from BundleContext. |
| * |
| * The closure instance calls the correct method on the specified ServiceUse |
| * object for the current service consumer type. |
| */ |
| public interface ServiceConsumer { |
| /** |
| * Used for calls from ServiceObjects. |
| */ |
| static ServiceConsumer prototypeConsumer = new ServiceConsumer() { |
| @Override |
| public <S> S getService(ServiceUse<S> use) { |
| return use.newServiceObject(); |
| } |
| |
| @Override |
| public <S> boolean ungetService(ServiceUse<S> use, S service) { |
| return use.releaseServiceObject(service); |
| } |
| }; |
| |
| /** |
| * Used for calls from BundleContext. |
| */ |
| static ServiceConsumer singletonConsumer = new ServiceConsumer() { |
| @Override |
| public <S> S getService(ServiceUse<S> use) { |
| return use.getService(); |
| } |
| |
| @Override |
| public <S> boolean ungetService(ServiceUse<S> use, S service) { |
| return use.ungetService(); |
| } |
| }; |
| |
| /** |
| * Get a service for the consumer. |
| * |
| * @param use Service Use object to get the service from. |
| * @return The obtained service. |
| */ |
| <S> S getService(ServiceUse<S> use); |
| |
| /** |
| * Unget the service for the consumer. |
| * |
| * @param use Service Use object to unget the service from. |
| * @param service The Service to unget. |
| * @return true if the service was ungotten, false otherwise. |
| */ |
| <S> boolean ungetService(ServiceUse<S> use, S service); |
| } |