| package org.eclipse.aether.spi.locator; |
| |
| /* |
| * 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. |
| */ |
| |
| import java.util.List; |
| |
| /** |
| * A simple infrastructure to programmatically wire the various components of the repository system together when it is |
| * used outside of an IoC container. Once a concrete implementation of a service locator has been setup, clients could |
| * use |
| * |
| * <pre> |
| * RepositorySystem repoSystem = serviceLocator.getService( RepositorySystem.class ); |
| * </pre> |
| * |
| * to acquire the repository system. Components that implement {@link Service} will be given an opportunity to acquire |
| * further components from the locator, thereby allowing to create the complete object graph of the repository system. |
| */ |
| public interface ServiceLocator |
| { |
| |
| /** |
| * Gets an instance of the specified service. |
| * |
| * @param <T> The service type. |
| * @param type The interface describing the service, must not be {@code null}. |
| * @return The service instance or {@code null} if the service could not be located/initialized. |
| */ |
| <T> T getService( Class<T> type ); |
| |
| /** |
| * Gets all available instances of the specified service. |
| * |
| * @param <T> The service type. |
| * @param type The interface describing the service, must not be {@code null}. |
| * @return The (read-only) list of available service instances, never {@code null}. |
| */ |
| <T> List<T> getServices( Class<T> type ); |
| |
| } |