1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 */
19 package org.eclipse.aether.spi.locator;
20
21 import java.util.List;
22
23 /**
24 * A simple infrastructure to programmatically wire the various components of the repository system together when it is
25 * used outside of an IoC container. Once a concrete implementation of a service locator has been setup, clients could
26 * use
27 *
28 * <pre>
29 * RepositorySystem repoSystem = serviceLocator.getService( RepositorySystem.class );
30 * </pre>
31 *
32 * to acquire the repository system. Components that implement {@link Service} will be given an opportunity to acquire
33 * further components from the locator, thereby allowing to create the complete object graph of the repository system.
34 *
35 * @deprecated Use of out-of-the-box DI implementation recommended, or, as alternative new supplier from
36 * module {@code maven-resolver-supplier}.
37 */
38 @Deprecated
39 public interface ServiceLocator {
40
41 /**
42 * Gets an instance of the specified service.
43 *
44 * @param <T> The service type.
45 * @param type The interface describing the service, must not be {@code null}.
46 * @return The service instance or {@code null} if the service could not be located/initialized.
47 */
48 <T> T getService(Class<T> type);
49
50 /**
51 * Gets all available instances of the specified service.
52 *
53 * @param <T> The service type.
54 * @param type The interface describing the service, must not be {@code null}.
55 * @return The (read-only) list of available service instances, never {@code null}.
56 */
57 <T> List<T> getServices(Class<T> type);
58 }