/
OrderClauseExpression.php
70 lines (64 loc) · 1.85 KB
/
OrderClauseExpression.php
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<?php
/**
* CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
* Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
*
* Licensed under The MIT License
* For full copyright and license information, please see the LICENSE.txt
* Redistributions of files must retain the above copyright notice.
*
* @copyright Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
* @link http://cakephp.org CakePHP(tm) Project
* @since 3.0.0
* @license http://www.opensource.org/licenses/mit-license.php MIT License
*/
namespace Cake\Database\Expression;
use Cake\Database\ExpressionInterface;
use Cake\Database\ValueBinder;
/**
* An expression object for complex ORDER BY clauses
*
* @internal
*/
class OrderClauseExpression implements ExpressionInterface, FieldInterface
{
use FieldTrait;
/**
* The direction of sorting.
*
* @var string
*/
protected $_direction;
/**
* Constructor
*
* @param \Cake\Database\ExpressionInterface|string $field The field to order on.
* @param string $direction The direction to sort on.
*/
public function __construct($field, $direction)
{
$this->_field = $field;
$this->_direction = strtolower($direction) === 'asc' ? 'ASC' : 'DESC';
}
/**
* {@inheritDoc}
*/
public function sql(ValueBinder $generator)
{
$field = $this->_field;
if ($field instanceof ExpressionInterface) {
$field = $field->sql($generator);
}
return sprintf("%s %s", $field, $this->_direction);
}
/**
* {@inheritDoc}
*/
public function traverse(callable $visitor)
{
if ($this->_field instanceof ExpressionInterface) {
$visitor($this->_field);
$this->_field->traverse($visitor);
}
}
}