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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.shared.jar.identification.exposers;
20  
21  import javax.inject.Named;
22  import javax.inject.Singleton;
23  
24  import java.util.jar.Attributes;
25  import java.util.jar.Manifest;
26  
27  import org.apache.maven.shared.jar.JarAnalyzer;
28  import org.apache.maven.shared.jar.identification.JarIdentification;
29  import org.apache.maven.shared.jar.identification.JarIdentificationExposer;
30  
31  /**
32   * Exposer that examines a JAR's manifest to derive Maven metadata.
33   */
34  @Singleton
35  @Named("manifest")
36  public class ManifestExposer implements JarIdentificationExposer {
37      @Override
38      public void expose(JarIdentification identification, JarAnalyzer jarAnalyzer) {
39          Manifest manifest = jarAnalyzer.getJarData().getManifest();
40          if (manifest != null) {
41              addManifestAttributeValues(manifest.getMainAttributes(), identification);
42  
43              for (Attributes attribs : manifest.getEntries().values()) {
44                  addManifestAttributeValues(attribs, identification);
45              }
46          }
47      }
48  
49      private void addManifestAttributeValues(Attributes attribs, JarIdentification identification) {
50          identification.addName(attribs.getValue(Attributes.Name.IMPLEMENTATION_TITLE));
51          identification.addVersion(attribs.getValue(Attributes.Name.IMPLEMENTATION_VERSION));
52          identification.addVendor(attribs.getValue(Attributes.Name.IMPLEMENTATION_VENDOR));
53  
54          identification.addName(attribs.getValue(Attributes.Name.SPECIFICATION_TITLE));
55          identification.addVersion(attribs.getValue(Attributes.Name.SPECIFICATION_VERSION));
56          identification.addVendor(attribs.getValue(Attributes.Name.SPECIFICATION_VENDOR));
57  
58          identification.addGroupId(attribs.getValue(Attributes.Name.EXTENSION_NAME));
59      }
60  }