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<?php
/**
* League.csv - A lightweight CSV Coder/Decoder library
*
* @author Ignace Nyamagana Butera <nyamsprod@gmail.com>
* @copyright 2014 Ignace Nyamagana Butera
* @link https://github.com/nyamsprod/League.csv
* @license http://opensource.org/licenses/MIT
* @version 5.0.0
* @package League.csv
*
* MIT LICENSE
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
namespace League\Csv\Iterator;
use Iterator;
use ArrayIterator;
/**
* A Trait to sort an Iterator
*
* @package League.csv
* @since 4.2.1
*
*/
trait IteratorSortBy
{
/**
* Callable function to sort the ArrayObject
*
* @var callable
*/
private $sortBy;
/**
* Set the ArrayObject sort method
*
* @param callable $sort
*
* @return self
*/
public function setSortBy(callable $sortBy)
{
$this->sortBy = $sortBy;
return $this;
}
/**
* Sort the Iterator
*
* @param \Iterator $iterator
*
* @return \ArrayIterator
*/
protected function applySortBy(Iterator $iterator)
{
if (! $this->sortBy) {
return $iterator;
}
$res = iterator_to_array($iterator, false);
uasort($res, $this->sortBy);
$this->sortBy = null;
return new ArrayIterator($res);
}
}
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