package org.apache.maven.project.interpolation;

 /*

  * Licensed to the Apache Software Foundation (ASF) under one

  * or more contributor license agreements.  See the NOTICE file

  * distributed with this work for additional information

  * regarding copyright ownership.  The ASF licenses this file

  * to you under the Apache License, Version 2.0 (the

  * "License"); you may not use this file except in compliance

  * with the License.  You may obtain a copy of the License at

  *

  *  http://www.apache.org/licenses/LICENSE-2.0

  *

  * Unless required by applicable law or agreed to in writing,

  * software distributed under the License is distributed on an

  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY

  * KIND, either express or implied.  See the License for the

  * specific language governing permissions and limitations

  * under the License.

  */

 import java.text.SimpleDateFormat;

 import java.util.Date;

 import org.codehaus.plexus.interpolation.AbstractValueSource;

 /**

  *

  * @version $Id: BuildTimestampValueSource.java 708543 2008-10-28 11:54:17Z bentmann $

  */

 public class BuildTimestampValueSource

     extends AbstractValueSource

 {

     private final Date startTime;

     private final String format;

     private String formattedDate;

     public BuildTimestampValueSource( Date startTime, String format )

     {

         super( false );

         this.startTime = startTime;

         this.format = format;

     }

     public Object getValue( String expression )

     {

         if ( "build.timestamp".equals( expression ) || "maven.build.timestamp".equals( expression ) )

         {

             if ( formattedDate == null && startTime != null )

             {

                 formattedDate = new SimpleDateFormat( format ).format( startTime );

             }

             return formattedDate;

         }

         return null;

     }

 }