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<?php
/*
* This file is part of php-token-stream.
*
* (c) Sebastian Bergmann <sebastian@phpunit.de>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
/**
* A caching factory for token stream objects.
*/
class PHP_Token_Stream_CachingFactory
{
/**
* @var array
*/
protected static $cache = [];
/**
* @param string $filename
*
* @return PHP_Token_Stream
*/
public static function get($filename)
{
if (!isset(self::$cache[$filename])) {
self::$cache[$filename] = new PHP_Token_Stream($filename);
}
return self::$cache[$filename];
}
/**
* @param string $filename
*/
public static function clear($filename = null)
{
if (is_string($filename)) {
unset(self::$cache[$filename]);
} else {
self::$cache = [];
}
}
}