<?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;

use Symfony\Component\Config\Definition\Exception\InvalidTypeException;

/**
* This node represents a scalar value in the config tree.
*
* The following values are considered scalars:
* * booleans
* * strings
* * null
* * integers
* * floats
*
* @author Johannes M. Schmitt <schmittjoh@gmail.com>
*/
class ScalarNode extends VariableNode
{
/**
* {@inheritdoc}
*/
protected function validateType($value)
{
if (!\is_scalar($value) && null !== $value) {
$ex = new InvalidTypeException(sprintf('Invalid type for path "%s". Expected scalar, but got %s.', $this->getPath(), \gettype($value)));
if ($hint = $this->getInfo()) {
$ex->addHint($hint);
}
$ex->setPath($this->getPath());

throw $ex;
}
}

/**
* {@inheritdoc}
*/
protected function isValueEmpty($value)
{
// assume environment variables are never empty (which in practice is likely to be true during runtime)
// not doing so breaks many configs that are valid today
if ($this->isHandlingPlaceholder()) {
return false;
}

return null === $value || '' === $value;
}

/**
* {@inheritdoc}
*/
protected function getValidPlaceholderTypes(): array
{
return ['bool', 'int', 'float', 'string'];
}
}