mirror of
https://github.com/dg/dibi.git
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137 lines
2.8 KiB
PHP
137 lines
2.8 KiB
PHP
<?php
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/**
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* dibi - tiny'n'smart database abstraction layer
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* ----------------------------------------------
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*
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* Copyright (c) 2005, 2008 David Grudl aka -dgx- (http://www.dgx.cz)
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*
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* This source file is subject to the "dibi license" that is bundled
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* with this package in the file license.txt.
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*
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* For more information please see http://dibiphp.com/
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*
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* @copyright Copyright (c) 2005, 2008 David Grudl
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* @license http://dibiphp.com/license dibi license
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* @link http://dibiphp.com/
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* @package dibi
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*/
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/**
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* External result set iterator.
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*
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* This can be returned by DibiResult::getIterator() method or using foreach
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* <code>
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* $result = dibi::query('SELECT * FROM table');
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* foreach ($result as $row) {
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* print_r($row);
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* }
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* unset($result);
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* </code>
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*
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* Optionally you can specify offset and limit:
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* <code>
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* foreach ($result->getIterator(2, 3) as $row) {
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* print_r($row);
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* }
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* </code>
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*
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* @author David Grudl
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* @copyright Copyright (c) 2005, 2008 David Grudl
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* @package dibi
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* @version $Revision$ $Date$
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*/
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final class DibiResultIterator implements Iterator
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{
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/** @var DibiResult */
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private $result;
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/** @var int */
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private $offset;
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/** @var int */
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private $limit;
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/** @var int */
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private $row;
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/** @var int */
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private $pointer;
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/**
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* Required by the Iterator interface.
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* @param int offset
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* @param int limit
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*/
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public function __construct(DibiResult $result, $offset, $limit)
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{
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$this->result = $result;
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$this->offset = (int) $offset;
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$this->limit = $limit === NULL ? -1 : (int) $limit;
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}
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/**
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* Rewinds the Iterator to the first element.
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* @return void
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*/
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public function rewind()
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{
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$this->pointer = 0;
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$this->result->seek($this->offset);
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$this->row = $this->result->fetch();
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}
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/**
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* Returns the key of the current element.
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* @return mixed
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*/
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public function key()
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{
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return $this->pointer;
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}
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/**
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* Returns the current element.
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* @return mixed
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*/
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public function current()
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{
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return $this->row;
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}
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/**
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* Moves forward to next element.
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* @return void
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*/
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public function next()
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{
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//$this->result->seek($this->offset + $this->pointer + 1);
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$this->row = $this->result->fetch();
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$this->pointer++;
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}
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/**
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* Checks if there is a current element after calls to rewind() or next().
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* @return bool
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*/
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public function valid()
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{
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return !empty($this->row) && ($this->limit < 0 || $this->pointer < $this->limit);
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}
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}
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