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https://github.com/yiisoft/yii2.git
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e6f5c46cdc
- Deprecated `yii\base\BaseObject::className()` in favor of native PHP syntax `::class`, which does not trigger autoloading - Deprecated XCache and Zend data cache support as caching backends - Deprecated `yii\BaseYii::powered()` method - Added `yii\base\InvalidArgumentException` and deprecated `yii\base\InvalidParamException` - Added `yii\BaseYii::debug()` and deprecated `yii\BaseYii::trace()`
279 lines
9.0 KiB
PHP
279 lines
9.0 KiB
PHP
<?php
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/**
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* @link http://www.yiiframework.com/
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* @copyright Copyright (c) 2008 Yii Software LLC
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* @license http://www.yiiframework.com/license/
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*/
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namespace yii\data;
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use Yii;
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use yii\base\Component;
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use yii\base\InvalidArgumentException;
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/**
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* BaseDataProvider provides a base class that implements the [[DataProviderInterface]].
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*
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* For more details and usage information on BaseDataProvider, see the [guide article on data providers](guide:output-data-providers).
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*
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* @property int $count The number of data models in the current page. This property is read-only.
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* @property array $keys The list of key values corresponding to [[models]]. Each data model in [[models]] is
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* uniquely identified by the corresponding key value in this array.
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* @property array $models The list of data models in the current page.
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* @property Pagination|false $pagination The pagination object. If this is false, it means the pagination is
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* disabled. Note that the type of this property differs in getter and setter. See [[getPagination()]] and
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* [[setPagination()]] for details.
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* @property Sort|bool $sort The sorting object. If this is false, it means the sorting is disabled. Note that
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* the type of this property differs in getter and setter. See [[getSort()]] and [[setSort()]] for details.
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* @property int $totalCount Total number of possible data models.
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*
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* @author Qiang Xue <qiang.xue@gmail.com>
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* @since 2.0
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*/
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abstract class BaseDataProvider extends Component implements DataProviderInterface
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{
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/**
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* @var int Number of data providers on the current page. Used to generate unique IDs.
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*/
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private static $counter = 0;
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/**
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* @var string an ID that uniquely identifies the data provider among all data providers.
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* Generated automatically the following way in case it is not set:
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*
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* - First data provider ID is empty.
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* - Second and all subsequent data provider IDs are: "dp-1", "dp-2", etc.
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*/
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public $id;
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private $_sort;
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private $_pagination;
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private $_keys;
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private $_models;
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private $_totalCount;
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/**
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* {@inheritdoc}
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*/
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public function init()
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{
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parent::init();
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if ($this->id === null) {
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if (self::$counter > 0) {
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$this->id = 'dp-' . self::$counter;
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}
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self::$counter++;
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}
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}
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/**
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* Prepares the data models that will be made available in the current page.
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* @return array the available data models
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*/
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abstract protected function prepareModels();
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/**
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* Prepares the keys associated with the currently available data models.
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* @param array $models the available data models
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* @return array the keys
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*/
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abstract protected function prepareKeys($models);
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/**
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* Returns a value indicating the total number of data models in this data provider.
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* @return int total number of data models in this data provider.
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*/
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abstract protected function prepareTotalCount();
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/**
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* Prepares the data models and keys.
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*
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* This method will prepare the data models and keys that can be retrieved via
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* [[getModels()]] and [[getKeys()]].
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*
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* This method will be implicitly called by [[getModels()]] and [[getKeys()]] if it has not been called before.
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*
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* @param bool $forcePrepare whether to force data preparation even if it has been done before.
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*/
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public function prepare($forcePrepare = false)
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{
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if ($forcePrepare || $this->_models === null) {
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$this->_models = $this->prepareModels();
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}
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if ($forcePrepare || $this->_keys === null) {
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$this->_keys = $this->prepareKeys($this->_models);
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}
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}
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/**
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* Returns the data models in the current page.
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* @return array the list of data models in the current page.
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*/
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public function getModels()
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{
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$this->prepare();
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return $this->_models;
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}
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/**
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* Sets the data models in the current page.
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* @param array $models the models in the current page
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*/
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public function setModels($models)
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{
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$this->_models = $models;
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}
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/**
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* Returns the key values associated with the data models.
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* @return array the list of key values corresponding to [[models]]. Each data model in [[models]]
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* is uniquely identified by the corresponding key value in this array.
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*/
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public function getKeys()
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{
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$this->prepare();
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return $this->_keys;
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}
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/**
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* Sets the key values associated with the data models.
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* @param array $keys the list of key values corresponding to [[models]].
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*/
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public function setKeys($keys)
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{
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$this->_keys = $keys;
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}
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/**
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* Returns the number of data models in the current page.
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* @return int the number of data models in the current page.
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*/
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public function getCount()
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{
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return count($this->getModels());
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}
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/**
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* Returns the total number of data models.
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* When [[pagination]] is false, this returns the same value as [[count]].
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* Otherwise, it will call [[prepareTotalCount()]] to get the count.
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* @return int total number of possible data models.
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*/
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public function getTotalCount()
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{
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if ($this->getPagination() === false) {
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return $this->getCount();
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} elseif ($this->_totalCount === null) {
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$this->_totalCount = $this->prepareTotalCount();
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}
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return $this->_totalCount;
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}
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/**
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* Sets the total number of data models.
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* @param int $value the total number of data models.
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*/
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public function setTotalCount($value)
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{
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$this->_totalCount = $value;
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}
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/**
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* Returns the pagination object used by this data provider.
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* Note that you should call [[prepare()]] or [[getModels()]] first to get correct values
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* of [[Pagination::totalCount]] and [[Pagination::pageCount]].
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* @return Pagination|false the pagination object. If this is false, it means the pagination is disabled.
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*/
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public function getPagination()
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{
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if ($this->_pagination === null) {
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$this->setPagination([]);
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}
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return $this->_pagination;
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}
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/**
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* Sets the pagination for this data provider.
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* @param array|Pagination|bool $value the pagination to be used by this data provider.
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* This can be one of the following:
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*
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* - a configuration array for creating the pagination object. The "class" element defaults
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* to 'yii\data\Pagination'
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* - an instance of [[Pagination]] or its subclass
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* - false, if pagination needs to be disabled.
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*
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* @throws InvalidArgumentException
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*/
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public function setPagination($value)
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{
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if (is_array($value)) {
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$config = ['class' => Pagination::className()];
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if ($this->id !== null) {
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$config['pageParam'] = $this->id . '-page';
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$config['pageSizeParam'] = $this->id . '-per-page';
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}
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$this->_pagination = Yii::createObject(array_merge($config, $value));
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} elseif ($value instanceof Pagination || $value === false) {
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$this->_pagination = $value;
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} else {
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throw new InvalidArgumentException('Only Pagination instance, configuration array or false is allowed.');
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}
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}
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/**
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* Returns the sorting object used by this data provider.
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* @return Sort|bool the sorting object. If this is false, it means the sorting is disabled.
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*/
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public function getSort()
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{
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if ($this->_sort === null) {
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$this->setSort([]);
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}
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return $this->_sort;
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}
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/**
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* Sets the sort definition for this data provider.
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* @param array|Sort|bool $value the sort definition to be used by this data provider.
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* This can be one of the following:
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*
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* - a configuration array for creating the sort definition object. The "class" element defaults
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* to 'yii\data\Sort'
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* - an instance of [[Sort]] or its subclass
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* - false, if sorting needs to be disabled.
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*
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* @throws InvalidArgumentException
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*/
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public function setSort($value)
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{
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if (is_array($value)) {
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$config = ['class' => Sort::className()];
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if ($this->id !== null) {
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$config['sortParam'] = $this->id . '-sort';
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}
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$this->_sort = Yii::createObject(array_merge($config, $value));
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} elseif ($value instanceof Sort || $value === false) {
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$this->_sort = $value;
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} else {
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throw new InvalidArgumentException('Only Sort instance, configuration array or false is allowed.');
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}
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}
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/**
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* Refreshes the data provider.
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* After calling this method, if [[getModels()]], [[getKeys()]] or [[getTotalCount()]] is called again,
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* they will re-execute the query and return the latest data available.
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*/
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public function refresh()
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{
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$this->_totalCount = null;
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$this->_models = null;
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$this->_keys = null;
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}
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}
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