1 package org.eclipse.aether.util.filter;
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 java.util.List;
23 import static java.util.Objects.requireNonNull;
24
25 import org.eclipse.aether.graph.DependencyFilter;
26 import org.eclipse.aether.graph.DependencyNode;
27
28 /**
29 * A dependency filter that negates another filter.
30 */
31 public final class NotDependencyFilter
32 implements DependencyFilter
33 {
34
35 private final DependencyFilter filter;
36
37 /**
38 * Creates a new filter negatint the specified filter.
39 *
40 * @param filter The filter to negate, must not be {@code null}.
41 */
42 public NotDependencyFilter( DependencyFilter filter )
43 {
44 this.filter = requireNonNull( filter, "dependency filter cannot be null" );
45 }
46
47 public boolean accept( DependencyNode node, List<DependencyNode> parents )
48 {
49 return !filter.accept( node, parents );
50 }
51
52 @Override
53 public boolean equals( Object obj )
54 {
55 if ( this == obj )
56 {
57 return true;
58 }
59
60 if ( obj == null || !getClass().equals( obj.getClass() ) )
61 {
62 return false;
63 }
64
65 NotDependencyFilter that = (NotDependencyFilter) obj;
66
67 return this.filter.equals( that.filter );
68 }
69
70 @Override
71 public int hashCode()
72 {
73 int hash = getClass().hashCode();
74 hash = hash * 31 + filter.hashCode();
75 return hash;
76 }
77
78 }