001package org.apache.maven.model.interpolation;
002
003/*
004 * Licensed to the Apache Software Foundation (ASF) under one
005 * or more contributor license agreements.  See the NOTICE file
006 * distributed with this work for additional information
007 * regarding copyright ownership.  The ASF licenses this file
008 * to you under the Apache License, Version 2.0 (the
009 * "License"); you may not use this file except in compliance
010 * with the License.  You may obtain a copy of the License at
011 *
012 *  http://www.apache.org/licenses/LICENSE-2.0
013 *
014 * Unless required by applicable law or agreed to in writing,
015 * software distributed under the License is distributed on an
016 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
017 * KIND, either express or implied.  See the License for the
018 * specific language governing permissions and limitations
019 * under the License.
020 */
021
022import java.text.SimpleDateFormat;
023import java.util.Date;
024import java.util.Properties;
025import java.util.TimeZone;
026
027public class MavenBuildTimestamp
028{
029    // ISO 8601-compliant timestamp for machine readability
030    public static final String DEFAULT_BUILD_TIMESTAMP_FORMAT = "yyyy-MM-dd'T'HH:mm:ss'Z'";
031
032    public static final String BUILD_TIMESTAMP_FORMAT_PROPERTY = "maven.build.timestamp.format";
033
034    private String formattedTimestamp;
035
036    public MavenBuildTimestamp()
037    {
038        this( new Date() );
039    }
040
041    public MavenBuildTimestamp( Date time )
042    {
043        this( time, DEFAULT_BUILD_TIMESTAMP_FORMAT );
044    }
045
046    public MavenBuildTimestamp( Date time, Properties properties )
047    {
048        this( time, properties != null ? properties.getProperty( BUILD_TIMESTAMP_FORMAT_PROPERTY ) : null );
049    }
050
051    public MavenBuildTimestamp( Date time, String timestampFormat )
052    {
053        if ( timestampFormat == null )
054        {
055            timestampFormat = DEFAULT_BUILD_TIMESTAMP_FORMAT;
056        }
057        if ( time == null )
058        {
059            time = new Date();
060        }
061        SimpleDateFormat dateFormat = new SimpleDateFormat( timestampFormat );
062        dateFormat.setTimeZone( TimeZone.getTimeZone( "UTC" ) );
063        formattedTimestamp = dateFormat.format( time );
064    }
065
066    public String formattedTimestamp()
067    {
068        return formattedTimestamp;
069    }
070}