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.apache.maven.api.plugin.testing.stubs;
20
21 import java.util.List;
22 import java.util.Map;
23 import java.util.Optional;
24
25 import org.apache.maven.api.services.Lookup;
26 import org.apache.maven.api.services.LookupException;
27
28 /**
29 * A stub implementation of {@link Lookup} for testing purposes.
30 * Provides a simple service lookup mechanism for tests.
31 *
32 * @since 4.0.0
33 */
34 public class LookupStub implements Lookup {
35
36 public static final Lookup EMPTY = new LookupStub();
37
38 /**
39 * For sub-class constructors.
40 */
41 protected LookupStub() {}
42
43 @Override
44 public <T> T lookup(Class<T> type) {
45 throw new LookupException("This is only a stub.");
46 }
47
48 @Override
49 public <T> T lookup(Class<T> type, String string) {
50 throw new LookupException("This is only a stub.");
51 }
52
53 @Override
54 public <T> Optional<T> lookupOptional(Class<T> type) {
55 return Optional.empty();
56 }
57
58 @Override
59 public <T> Optional<T> lookupOptional(Class<T> type, String string) {
60 return Optional.empty();
61 }
62
63 @Override
64 public <T> List<T> lookupList(Class<T> type) {
65 return List.of();
66 }
67
68 @Override
69 public <T> Map<String, T> lookupMap(Class<T> type) {
70 return Map.of();
71 }
72 }