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<?php
/**
* @link https://www.yiiframework.com/
* @copyright Copyright (c) 2008 Yii Software LLC
* @license https://www.yiiframework.com/license/
*/
namespace yii\data;
/**
* DataProviderInterface is the interface that must be implemented by data provider classes.
*
* Data providers are components that sort and paginate data, and provide them to widgets
* such as [[\yii\grid\GridView]], [[\yii\widgets\ListView]].
*
* For more details and usage information on DataProviderInterface, see the [guide article on data providers](guide:output-data-providers).
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @since 2.0
*/
interface DataProviderInterface
{
/**
* Prepares the data models and keys.
*
* This method will prepare the data models and keys that can be retrieved via
* [[getModels()]] and [[getKeys()]].
*
* This method will be implicitly called by [[getModels()]] and [[getKeys()]] if it has not been called before.
*
* @param bool $forcePrepare whether to force data preparation even if it has been done before.
*/
public function prepare($forcePrepare = false);
/**
* Returns the number of data models in the current page.
* This is equivalent to `count($provider->getModels())`.
* When [[getPagination|pagination]] is false, this is the same as [[getTotalCount|totalCount]].
* @return int the number of data models in the current page.
*/
public function getCount();
/**
* Returns the total number of data models.
* When [[getPagination|pagination]] is false, this is the same as [[getCount|count]].
* @return int total number of possible data models.
*/
public function getTotalCount();
/**
* Returns the data models in the current page.
* @return array the list of data models in the current page.
*/
public function getModels();
/**
* Returns the key values associated with the data models.
* @return array the list of key values corresponding to [[getModels|models]]. Each data model in [[getModels|models]]
* is uniquely identified by the corresponding key value in this array.
*/
public function getKeys();
/**
* @return Sort|false the sorting object. If this is false, it means the sorting is disabled.
*/
public function getSort();
/**
* @return Pagination|false the pagination object. If this is false, it means the pagination is disabled.
*/
public function getPagination();
}
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