1 package org.eclipse.aether.util.graph.manager;
2
3 /*
4 * Licensed to the Apache Software Foundation (ASF) under one
5 * or more contributor license agreements. See the NOTICE file
6 * distributed with this work for additional information
7 * regarding copyright ownership. The ASF licenses this file
8 * to you under the Apache License, Version 2.0 (the
9 * "License"); you may not use this file except in compliance
10 * with the License. You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing,
15 * software distributed under the License is distributed on an
16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17 * KIND, either express or implied. See the License for the
18 * specific language governing permissions and limitations
19 * under the License.
20 */
21
22 import org.eclipse.aether.collection.DependencyCollectionContext;
23 import org.eclipse.aether.collection.DependencyManagement;
24 import org.eclipse.aether.collection.DependencyManager;
25 import org.eclipse.aether.graph.Dependency;
26
27 /**
28 * A dependency manager that does not do any dependency management.
29 */
30 public final class NoopDependencyManager
31 implements DependencyManager
32 {
33
34 /**
35 * A ready-made instance of this dependency manager which can safely be reused throughout an entire application
36 * regardless of multi-threading.
37 */
38 public static final DependencyManager INSTANCE = new NoopDependencyManager();
39
40 /**
41 * Creates a new instance of this dependency manager. Usually, {@link #INSTANCE} should be used instead.
42 */
43 public NoopDependencyManager()
44 {
45 }
46
47 public DependencyManager deriveChildManager( DependencyCollectionContext context )
48 {
49 return this;
50 }
51
52 public DependencyManagement manageDependency( Dependency dependency )
53 {
54 return null;
55 }
56
57 @Override
58 public boolean equals( Object obj )
59 {
60 if ( this == obj )
61 {
62 return true;
63 }
64 else if ( null == obj || !getClass().equals( obj.getClass() ) )
65 {
66 return false;
67 }
68 return true;
69 }
70
71 @Override
72 public int hashCode()
73 {
74 return getClass().hashCode();
75 }
76
77 }