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<?php
/*
* This file is part of Psy Shell.
*
* (c) 2012-2017 Justin Hileman
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Psy\CodeCleaner;
use PhpParser\Node;
use PhpParser\Node\Stmt\Class_;
use Psy\Exception\FatalErrorException;
/**
* The final class pass handles final classes.
*/
class FinalClassPass extends CodeCleanerPass
{
private $finalClasses;
/**
* @param array $nodes
*/
public function beforeTraverse(array $nodes)
{
$this->finalClasses = array();
}
/**
* @throws RuntimeException if the node is a class that extends a final class
*
* @param Node $node
*/
public function enterNode(Node $node)
{
if ($node instanceof Class_) {
if ($node->extends) {
$extends = (string) $node->extends;
if ($this->isFinalClass($extends)) {
$msg = sprintf('Class %s may not inherit from final class (%s)', $node->name, $extends);
throw new FatalErrorException($msg, 0, E_ERROR, null, $node->getLine());
}
}
if ($node->isFinal()) {
$this->finalClasses[strtolower($node->name)] = true;
}
}
}
/**
* @param string $name Class name
*
* @return bool
*/
private function isFinalClass($name)
{
if (!class_exists($name)) {
return isset($this->finalClasses[strtolower($name)]);
}
$refl = new \ReflectionClass($name);
return $refl->isFinal();
}
}