# DateObjectComparator.class.php

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    00001 <?php
    00002 /***************************************************************************
    00003  *   Copyright (C) 2009 by Denis M. Gabaidulin                             *
    00004  *                                                                         *
    00005  *   This program is free software; you can redistribute it and/or modify  *
    00006  *   it under the terms of the GNU Lesser General Public License as        *
    00007  *   published by the Free Software Foundation; either version 3 of the    *
    00008  *   License, or (at your option) any later version.                       *
    00009  *                                                                         *
    00010  ***************************************************************************/
    00011
    00012     final class DateObjectComparator extends Singleton
    00013         implements Comparator, Instantiatable
    00014     {
    00015         public static function me()
    00016         {
    00017             return Singleton::getInstance(__CLASS__);
    00018         }
    00019
    00020         public function compare(/*Date*/ $one,/*Date*/ $two)
    00021         {
    00022             Assert::isInstance($one, 'Date');
    00023             Assert::isInstance($two, 'Date');
    00024
    00025             $stamp1 = $one->toStamp();
    00026             $stamp2 = $two->toStamp();
    00027
    00028             if ($stamp1 == $stamp2)
    00029                 return 0;
    00030
    00031             return ($stamp1 < $stamp2) ? -1 : 1;
    00032         }
    00033     }
    00034 ?>