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1   package org.apache.maven.shared.mapping;
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.util.Properties;
23  
24  import org.codehaus.plexus.interpolation.PropertiesBasedValueSource;
25  
26  /**
27   * This is a ValueSource, that can be used in an Interpolator. It supports special expressions, like
28   * <code>dashClassifier</code> and <code>dashClassifier?</code>.
29   *
30   * @version $Id: DashClassifierValueSource.java 1714312 2015-11-14 12:48:14Z khmarbaise $
31   */
32  public class DashClassifierValueSource
33      extends PropertiesBasedValueSource
34  {
35      /**
36       * Create the ValueSource.
37       *
38       * @param classifier The classifier that should be used during interpolation
39       */
40      public DashClassifierValueSource( String classifier )
41      {
42          super( createDashClassifierProperties( classifier ) );
43      }
44  
45      private static Properties createDashClassifierProperties( String classifier )
46      {
47          Properties classifierMask = new Properties();
48  
49          if ( classifier != null )
50          {
51              classifierMask.setProperty( "dashClassifier?", "-" + classifier );
52              classifierMask.setProperty( "dashClassifier", "-" + classifier );
53          }
54          else
55          {
56              classifierMask.setProperty( "dashClassifier?", "" );
57              classifierMask.setProperty( "dashClassifier", "" );
58              // Make sure that the classifier property is usable, if it is null
59              classifierMask.setProperty( "classifier", "" );
60          }
61          return classifierMask;
62      }
63  }