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1   package org.apache.maven.artifact.resolver.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 org.apache.maven.artifact.Artifact;
23  
24  /**
25   * InversionArtifactFilter
26   */
27  public class InversionArtifactFilter
28      implements ArtifactFilter
29  {
30      private final ArtifactFilter toInvert;
31  
32      public InversionArtifactFilter( ArtifactFilter toInvert )
33      {
34          this.toInvert = toInvert;
35      }
36  
37      public boolean include( Artifact artifact )
38      {
39          return !toInvert.include( artifact );
40      }
41  
42      @Override
43      public int hashCode()
44      {
45          int hash = 17;
46          hash = hash * 31 + toInvert.hashCode();
47          return hash;
48      }
49  
50      @Override
51      public boolean equals( Object obj )
52      {
53          if ( this == obj )
54          {
55              return true;
56          }
57  
58          if ( !( obj instanceof InversionArtifactFilter ) )
59          {
60              return false;
61          }
62  
63          InversionArtifactFilter other = (InversionArtifactFilter) obj;
64  
65          return toInvert.equals( other.toInvert );
66      }
67  
68  }