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