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1   package org.apache.maven.model.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   */
30  class BuildTimestampValueSource
31      extends AbstractValueSource
32  {
33  
34      private final Date startTime;
35  
36      private final String format;
37      
38      private String formattedDate;
39  
40      public BuildTimestampValueSource( Date startTime, String format )
41      {
42          super( false );
43          this.startTime = startTime;
44          this.format = format;
45      }
46  
47      public Object getValue( String expression )
48      {
49          if ( "build.timestamp".equals( expression ) || "maven.build.timestamp".equals( expression ) )
50          {
51              if ( formattedDate == null && startTime != null )
52              {
53                  formattedDate = new SimpleDateFormat( format ).format( startTime );
54              }
55              
56              return formattedDate;
57          }
58  
59          return null;
60      }
61  
62  }