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 public class LookupStub implements Lookup {
29 /**
30 * A stub where all methods return an empty value when possible, or throw an exception otherwise.
31 */
32 public static final Lookup EMPTY = new LookupStub();
33
34 /**
35 * For sub-class constructors.
36 */
37 protected LookupStub() {}
38
39 @Override
40 public <T> T lookup(Class<T> type) {
41 throw new LookupException("This is only a stub.");
42 }
43
44 @Override
45 public <T> T lookup(Class<T> type, String string) {
46 throw new LookupException("This is only a stub.");
47 }
48
49 @Override
50 public <T> Optional<T> lookupOptional(Class<T> type) {
51 return Optional.empty();
52 }
53
54 @Override
55 public <T> Optional<T> lookupOptional(Class<T> type, String string) {
56 return Optional.empty();
57 }
58
59 @Override
60 public <T> List<T> lookupList(Class<T> type) {
61 return List.of();
62 }
63
64 @Override
65 public <T> Map<String, T> lookupMap(Class<T> type) {
66 return Map.of();
67 }
68 }