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1   package org.apache.maven.plugins.shade.resource;
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.io.IOException;
23  import java.io.InputStream;
24  import java.util.List;
25  import java.util.jar.JarOutputStream;
26  
27  import org.apache.maven.plugins.shade.relocation.Relocator;
28  
29  /**
30   * Prevents duplicate copies of the license
31   */
32  public class ApacheLicenseResourceTransformer
33      implements ResourceTransformer
34  {
35  
36      private static final String LICENSE_PATH = "META-INF/LICENSE";
37  
38      private static final String LICENSE_TXT_PATH = "META-INF/LICENSE.txt";
39  
40      public boolean canTransformResource( String resource )
41      {
42          return LICENSE_PATH.equalsIgnoreCase( resource )
43              || LICENSE_TXT_PATH.regionMatches( true, 0, resource, 0, LICENSE_TXT_PATH.length() );
44      }
45  
46      public void processResource( String resource, InputStream is, List<Relocator> relocators )
47          throws IOException
48      {
49  
50      }
51  
52      public boolean hasTransformedResource()
53      {
54          return false;
55      }
56  
57      public void modifyOutputStream( JarOutputStream os )
58          throws IOException
59      {
60      }
61  }