KjwResultSet.php

<?php // vim:ts=4:sw=4:noet
/*====================================================================== 
Copyright (C) 2006-2009, Walter Doekes
This file is part of KjwLib-php45.
 
KjwLib-php45 is free software: you can redistribute it and/or modify 
it under the terms of the GNU General Public License as published by 
the Free Software Foundation, either version 3 of the License, or 
(at your option) any later version. 

KjwLib-php45 is distributed in the hope that it will be useful, 
but WITHOUT ANY WARRANTY; without even the implied warranty of 
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
GNU General Public License for more details. 

You should have received a copy of the GNU General Public License 
along with KjwLib-php45.  If not, see <http://www.gnu.org/licenses/>. 
======================================================================*/

require_once(dirname(__FILE__) . '/KjwObject.php');

class KjwResultSet extends KjwObject {
        function KjwResultSet() {
                parent::KjwObject();
        }

        /* [INHERITED DOCS] */
        function destroy() {
                parent::destroy();
        }

        function getNext() {
                return $this->notImplemented();
        }

        function at() {
                return $this->notImplemented();
        }

        function size() {
                return $this->notImplemented();
        }

        function seekAbs($offset) {
                return $this->notImplemented();
        }

        function seekRel($offset) {
                return $this->seekAbs($this->at() + $offset);
        }
        
        function getRandom($max = -1) {
                require_once(dirname(__FILE__) . '/KjwArrayResultSet.php'); /* PHP can cope with this. */
                $at = $this->at(); // push current position
                
                $list = array();
                for ($i = 0, $size = $this->size(); $i < $size; ++$i)
                        $list[] = $i;
                shuffle($list);
                
                $out = array();
                $i = 0;
                foreach ($list as $v) {
                        if ($i++ == $max)
                                break;
                        $this->seekAbs($v);
                        array_push($out, $this->getNext());
                }

                $this->seekAbs($at); // pop current position
                return new KjwArrayResultSet($out);
        }
}

?>

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