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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
28   * special expressions, like <code>dashClassifier</code> and
29   * <code>dashClassifier?</code>.
30   *
31   * @version $Id: DashClassifierValueSource.java 1512265 2013-08-09 11:38:38Z dennisl $
32   */
33  public class DashClassifierValueSource
34      extends PropertiesBasedValueSource
35  {
36      /**
37       * Create the ValueSource.
38       *
39       * @param classifier The classifier that should be used during interpolation
40       */
41      public DashClassifierValueSource( String classifier )
42      {
43          super( createDashClassifierProperties( classifier ) );
44      }
45  
46      private static Properties createDashClassifierProperties( String classifier )
47      {
48          Properties classifierMask = new Properties();
49  
50          if ( classifier != null )
51          {
52              classifierMask.setProperty( "dashClassifier?", "-" + classifier );
53              classifierMask.setProperty( "dashClassifier", "-" + classifier );
54          }
55          else
56          {
57              classifierMask.setProperty( "dashClassifier?", "" );
58              classifierMask.setProperty( "dashClassifier", "" );
59              // Make sure that the classifier property is usable, if it is null
60              classifierMask.setProperty( "classifier", "" );
61          }
62          return classifierMask;
63      }
64  }