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<?php
/**
* TDummyDataSource, TDummyDataSourceIterator classes
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @link https://github.com/pradosoft/prado
* @license https://github.com/pradosoft/prado/blob/master/LICENSE
*/
namespace Prado\Collections;
/**
* TDummyDataSourceIterator class
*
* TDummyDataSourceIterator implements \Iterator interface.
*
* TDummyDataSourceIterator is used by {@link TDummyDataSource}.
* It allows TDummyDataSource to return a new iterator
* for traversing its dummy items.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @since 3.0
*/
class TDummyDataSourceIterator implements \Iterator
{
private $_index;
private $_count;
/**
* Constructor.
* @param int $count number of (virtual) items in the data source.
*/
public function __construct($count)
{
$this->_count = $count;
$this->_index = 0;
}
/**
* Rewinds internal array pointer.
* This method is required by the interface Iterator.
*/
public function rewind(): void
{
$this->_index = 0;
}
/**
* Returns the key of the current array item.
* This method is required by the interface Iterator.
* @return int the key of the current array item
*/
#[\ReturnTypeWillChange]
public function key()
{
return $this->_index;
}
/**
* Returns the current array item.
* This method is required by the interface Iterator.
* @return mixed the current array item
*/
#[\ReturnTypeWillChange]
public function current()
{
return null;
}
/**
* Moves the internal pointer to the next array item.
* This method is required by the interface Iterator.
*/
public function next(): void
{
$this->_index++;
}
/**
* Returns whether there is an item at current position.
* This method is required by the interface Iterator.
* @return bool
*/
public function valid(): bool
{
return $this->_index < $this->_count;
}
}