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1   package org.apache.maven.project.interpolation;
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.text.SimpleDateFormat;
23  import java.util.Date;
24  
25  import org.codehaus.plexus.interpolation.AbstractValueSource;
26  
27  /**
28   *
29   * @version $Id: BuildTimestampValueSource.java 708543 2008-10-28 11:54:17Z bentmann $
30   */
31  public class BuildTimestampValueSource
32      extends AbstractValueSource
33  {
34  
35      private final Date startTime;
36  
37      private final String format;
38      
39      private String formattedDate;
40  
41      public BuildTimestampValueSource( Date startTime, String format )
42      {
43          super( false );
44          this.startTime = startTime;
45          this.format = format;
46      }
47  
48      public Object getValue( String expression )
49      {
50          if ( "build.timestamp".equals( expression ) || "maven.build.timestamp".equals( expression ) )
51          {
52              if ( formattedDate == null && startTime != null )
53              {
54                  formattedDate = new SimpleDateFormat( format ).format( startTime );
55              }
56              
57              return formattedDate;
58          }
59  
60          return null;
61      }
62  
63  }