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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\Config\Definition\Builder;
use Symfony\Component\Config\Definition\EnumNode;
/**
* Enum Node Definition.
*
* @author Johannes M. Schmitt <schmittjoh@gmail.com>
*/
class EnumNodeDefinition extends ScalarNodeDefinition
{
private $values;
/**
* @return $this
*/
public function values(array $values)
{
$values = array_unique($values);
if (empty($values)) {
throw new \InvalidArgumentException('->values() must be called with at least one value.');
}
$this->values = $values;
return $this;
}
/**
* Instantiate a Node.
*
* @return EnumNode The node
*
* @throws \RuntimeException
*/
protected function instantiateNode()
{
if (null === $this->values) {
throw new \RuntimeException('You must call ->values() on enum nodes.');
}
return new EnumNode($this->name, $this->parent, $this->values);
}
}