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
24 import org.eclipse.aether.graph.DependencyFilter;
25 import org.eclipse.aether.graph.DependencyNode;
26
27 /**
28 * A dependency filter that negates another filter.
29 */
30 public final class NotDependencyFilter
31 implements DependencyFilter
32 {
33
34 private final DependencyFilter filter;
35
36 /**
37 * Creates a new filter negatint the specified filter.
38 *
39 * @param filter The filter to negate, must not be {@code null}.
40 */
41 public NotDependencyFilter( DependencyFilter filter )
42 {
43 if ( filter == null )
44 {
45 throw new IllegalArgumentException( "no filter specified" );
46 }
47 this.filter = filter;
48 }
49
50 public boolean accept( DependencyNode node, List<DependencyNode> parents )
51 {
52 return !filter.accept( node, parents );
53 }
54
55 @Override
56 public boolean equals( Object obj )
57 {
58 if ( this == obj )
59 {
60 return true;
61 }
62
63 if ( obj == null || !getClass().equals( obj.getClass() ) )
64 {
65 return false;
66 }
67
68 NotDependencyFilter that = (NotDependencyFilter) obj;
69
70 return this.filter.equals( that.filter );
71 }
72
73 @Override
74 public int hashCode()
75 {
76 int hash = getClass().hashCode();
77 hash = hash * 31 + filter.hashCode();
78 return hash;
79 }
80
81 }