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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  You may obtain a copy of the License at
9    *
10   *   http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing,
13   * software distributed under the License is distributed on an
14   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15   * KIND, either express or implied.  See the License for the
16   * specific language governing permissions and limitations
17   * under the License.
18   */
19  package org.apache.maven.plugins.shade.resource;
20  
21  import java.io.File;
22  import java.io.FileInputStream;
23  import java.io.IOException;
24  import java.io.InputStream;
25  import java.util.List;
26  import java.util.jar.JarEntry;
27  import java.util.jar.JarOutputStream;
28  
29  import org.apache.maven.plugins.shade.relocation.Relocator;
30  import org.codehaus.plexus.util.IOUtil;
31  
32  /**
33   * A resource processor that allows the addition of an arbitrary file
34   * content into the shaded JAR.
35   */
36  public class IncludeResourceTransformer extends AbstractCompatibilityTransformer {
37      File file;
38  
39      String resource;
40  
41      private long time = Long.MIN_VALUE;
42  
43      public boolean canTransformResource(String r) {
44          return false;
45      }
46  
47      public void processResource(String resource, InputStream is, List<Relocator> relocators, long time)
48              throws IOException {
49          if (time > this.time) {
50              this.time = time;
51          }
52      }
53  
54      public boolean hasTransformedResource() {
55          return file != null && file.exists();
56      }
57  
58      public void modifyOutputStream(JarOutputStream jos) throws IOException {
59          JarEntry jarEntry = new JarEntry(resource);
60          jarEntry.setTime(time);
61  
62          try (InputStream in = new FileInputStream(file)) {
63              jos.putNextEntry(jarEntry);
64              IOUtil.copy(in, jos);
65          }
66      }
67  
68      @Override
69      public String toString() {
70          return "IncludeResourceTransformer {resource: '" + resource + "'}";
71      }
72  }