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.Collection;
23 import java.util.Collections;
24 import java.util.LinkedHashSet;
25 import java.util.List;
26 import java.util.Set;
27
28 import org.eclipse.aether.graph.DependencyFilter;
29 import org.eclipse.aether.graph.DependencyNode;
30
31 /**
32 * A dependency filter that combines zero or more other filters using a logical {@code OR}.
33 */
34 public final class OrDependencyFilter
35 implements DependencyFilter
36 {
37
38 private final Set<DependencyFilter> filters = new LinkedHashSet<>();
39
40 /**
41 * Creates a new filter from the specified filters.
42 *
43 * @param filters The filters to combine, may be {@code null}.
44 */
45 public OrDependencyFilter( DependencyFilter... filters )
46 {
47 if ( filters != null )
48 {
49 Collections.addAll( this.filters, filters );
50 }
51 }
52
53 /**
54 * Creates a new filter from the specified filters.
55 *
56 * @param filters The filters to combine, may be {@code null}.
57 */
58 public OrDependencyFilter( Collection<DependencyFilter> filters )
59 {
60 if ( filters != null )
61 {
62 this.filters.addAll( filters );
63 }
64 }
65
66 /**
67 * Creates a new filter from the specified filters.
68 *
69 * @param filter1 The first filter to combine, may be {@code null}.
70 * @param filter2 The first filter to combine, may be {@code null}.
71 * @return The combined filter or {@code null} if both filter were {@code null}.
72 */
73 public static DependencyFilter newInstance( DependencyFilter filter1, DependencyFilter filter2 )
74 {
75 if ( filter1 == null )
76 {
77 return filter2;
78 }
79 else if ( filter2 == null )
80 {
81 return filter1;
82 }
83 return new OrDependencyFilter( filter1, filter2 );
84 }
85
86 public boolean accept( DependencyNode node, List<DependencyNode> parents )
87 {
88 for ( DependencyFilter filter : filters )
89 {
90 if ( filter.accept( node, parents ) )
91 {
92 return true;
93 }
94 }
95 return false;
96 }
97
98 @Override
99 public boolean equals( Object obj )
100 {
101 if ( this == obj )
102 {
103 return true;
104 }
105
106 if ( obj == null || !getClass().equals( obj.getClass() ) )
107 {
108 return false;
109 }
110
111 OrDependencyFilter that = (OrDependencyFilter) obj;
112
113 return this.filters.equals( that.filters );
114 }
115
116 @Override
117 public int hashCode()
118 {
119 int hash = getClass().hashCode();
120 hash = hash * 31 + filters.hashCode();
121 return hash;
122 }
123
124 }