# CropFilter.class.php

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    00001 <?php
    00002 /***************************************************************************
    00003  *   Copyright (C) 2007 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
    00017     final class CropFilter implements Filtrator
    00018     {
    00019         private $start  = 0;
    00020         private $length = 0;
    00021
    00025         public static function create()
    00026         {
    00027             return new self;
    00028         }
    00029
    00033         public function setStart($start)
    00034         {
    00035             Assert::isPositiveInteger($start);
    00036
    00037             $this->start = $start;
    00038
    00039             return $this;
    00040         }
    00041
    00045         public function setLength($length)
    00046         {
    00047             Assert::isPositiveInteger($length);
    00048
    00049             $this->length = $length;
    00050
    00051             return $this;
    00052         }
    00053
    00054         public function apply($value)
    00055         {
    00056             return
    00057                 $this->length
    00058                     ? mb_strcut($value, $this->start, $this->length)
    00059                     : mb_strcut($value, $this->start);
    00060         }
    00061     }
    00062 ?>