mercury-1.0.0-alpha-2/mercury-util/src/main/java/org/apache/maven/mercury/util/TimeUtil.java

/**
 *  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.
 */
package org.apache.maven.mercury.util;

import java.text.ParseException;
import java.util.Date;

/**
 *
 *
 * @author Oleg Gusakov
 * @version $Id$
 *
 */
public class TimeUtil
{
  public static final java.util.TimeZone TS_TZ = java.util.TimeZone.getTimeZone( "UTC" );
  public static final java.text.DateFormat TS_FORMAT = new java.text.SimpleDateFormat( "yyyyMMddHHmmss" );
  
  static
  {
    TS_FORMAT.setTimeZone( TS_TZ );
  }

  /**
   * 
   * @return current UTC timestamp by yyyyMMddHHmmss mask
   */
  public static String getUTCTimestamp( )
  {
    return getUTCTimestamp( new Date() );
  }

  /**
   * 
   * @return current UTC timestamp by yyyyMMddHHmmss mask as a long int
   */
  public static long getUTCTimestampAsLong( )
  {
    return Long.parseLong( getUTCTimestamp( new Date() ) );
  }

  /**
   * 
   * @return current UTC timestamp by yyyyMMddHHmmss mask as a long int
   */
  public static long getUTCTimestampAsMillis( )
  {
    return Long.parseLong( getUTCTimestamp( new Date() ) );
  }
  /**
   * 
   * @param date
   * @return current date converted to UTC timestamp by yyyyMMddHHmmss mask
   */
  public static String getUTCTimestamp( Date date )
  {
      return TS_FORMAT.format( date );
  }

  /**
   * convert timestamp to millis
   * 
   * @param ts timestamp to convert. Presumed to be a long of form yyyyMMddHHmmss
   * @return millis, corresponding to the supplied TS
   * @throws ParseException is long does not follow the format
   */
  public static long toMillis( long ts )
  throws ParseException
  {
    return toMillis(  ""+ts );
  }

  /**
   * convert timestamp to millis
   * 
   * @param ts timestamp to convert. Presumed to be a string of form yyyyMMddHHmmss
   * @return millis, corresponding to the supplied TS
   * @throws ParseException is long does not follow the format
   */
  public static long toMillis( String ts )
  throws ParseException
  {
    Date dts =TS_FORMAT.parse( ts );
    
    return dts.getTime();
  }
}