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<?php
/**
* @link http://www.yiiframework.com/
* @copyright Copyright (c) 2008 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
namespace yii\data;
/**
* IDataProvider is the interface that must be implemented by data provider classes.
*
* Data providers are components that can provide data that are sorted and paginated.
* Data providers are often used with widgets, such as [[GridView]], [[ListView]]
* that display data and support sorting and pagination.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @since 2.0
*/
interface IDataProvider
{
/**
* Returns the number of data items in the current page.
* This is equivalent to `count($provider->getItems())`.
* When [[pagination]] is false, this is the same as [[totalItemCount]].
* @return integer the number of data items in the current page.
*/
public function getItemCount();
/**
* Returns the total number of data items.
* When [[pagination]] is false, this is the same as [[itemCount]].
* @return integer total number of possible data items.
*/
public function getTotalItemCount();
/**
* Returns the data items in the current page.
* @return array the list of data items in the current page.
*/
public function getItems();
/**
* Returns the key values associated with the data items.
* @return array the list of key values corresponding to [[items]]. Each data item in [[items]]
* is uniquely identified by the corresponding key value in this array.
*/
public function getKeys();
/**
* @return Sort the sorting object. If this is false, it means the sorting is disabled.
*/
public function getSort();
/**
* @return Pagination the pagination object. If this is false, it means the pagination is disabled.
*/
public function getPagination();
}