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107 lines
2.1 KiB
PHP
107 lines
2.1 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, 2009 David Grudl (http://davidgrudl.com)
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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, 2009 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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* @version $Id$
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*/
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/**
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* Provides an interface between a dataset and data-aware components.
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* @package dibi
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* @deprecated
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*/
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interface IDataSource extends Countable, IteratorAggregate
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{
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//function IteratorAggregate::getIterator();
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//function Countable::count();
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}
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/**
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* Default implementation of IDataSource for dibi.
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*
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* @author David Grudl
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* @copyright Copyright (c) 2005, 2009 David Grudl
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* @package dibi
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* @deprecated
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*/
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class DibiDataSource extends DibiObject implements IDataSource
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{
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/** @var DibiConnection */
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private $connection;
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/** @var string */
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private $sql;
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/** @var int */
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private $count;
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/**
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* @param string SQL command or table name, as data source
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* @param DibiConnection connection
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*/
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public function __construct($sql, DibiConnection $connection = NULL)
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{
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if (strpos($sql, ' ') === FALSE) {
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// table name
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$this->sql = $sql;
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} else {
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// SQL command
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$this->sql = '(' . $sql . ') AS [source]';
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}
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$this->connection = $connection === NULL ? dibi::getConnection() : $connection;
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}
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/**
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* @param int offset
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* @param int limit
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* @param array columns
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* @return ArrayIterator
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*/
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public function getIterator($offset = NULL, $limit = NULL)
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{
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return $this->connection->query('
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SELECT *
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FROM', $this->sql, '
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%ofs %lmt', $offset, $limit
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);
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}
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/**
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* @return int
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*/
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public function count()
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{
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if ($this->count === NULL) {
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$this->count = $this->connection->query('
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SELECT COUNT(*) FROM', $this->sql
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)->fetchSingle();
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}
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return $this->count;
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}
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}
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