001package com.hfg.util.scheduler;
002
003import java.util.Date;
004
005//------------------------------------------------------------------------------
006/**
007 Interface for specify a job execution schedule.
008 <div>
009 @author J. Alex Taylor, hairyfatguy.com
010 </div>
011 */
012//------------------------------------------------------------------------------
013// com.hfg Library
014//
015// This library is free software; you can redistribute it and/or
016// modify it under the terms of the GNU Lesser General Public
017// License as published by the Free Software Foundation; either
018// version 2.1 of the License, or (at your option) any later version.
019//
020// This library is distributed in the hope that it will be useful,
021// but WITHOUT ANY WARRANTY; without even the implied warranty of
022// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
023// Lesser General Public License for more details.
024//
025// You should have received a copy of the GNU Lesser General Public
026// License along with this library; if not, write to the Free Software
027// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
028//
029// J. Alex Taylor, President, Founder, CEO, COO, CFO, OOPS hairyfatguy.com
030// jataylor@hairyfatguy.com
031//------------------------------------------------------------------------------
032
033public interface Schedule
034{
035   //---------------------------------------------------------------------------
036   /**
037    Returns the next scheduled instance.
038    @return the next scheduled instance relative to the current date
039    */
040   public Date next();
041
042   //---------------------------------------------------------------------------
043   /**
044    Returns the first scheduled instance that comes after the specified reference date.
045    @param inReferenceDate the date from which the next scheduled time will be calculated
046    @return the first scheduled instance that comes after the specified date
047    */
048   public Date nextAfter(Date inReferenceDate);
049}