Chris@0: <?php
Chris@0: /*
Chris@14:  * This file is part of php-token-stream.
Chris@0:  *
Chris@0:  * (c) Sebastian Bergmann <sebastian@phpunit.de>
Chris@0:  *
Chris@0:  * For the full copyright and license information, please view the LICENSE
Chris@0:  * file that was distributed with this source code.
Chris@0:  */
Chris@0: 
Chris@0: /**
Chris@0:  * A caching factory for token stream objects.
Chris@0:  */
Chris@0: class PHP_Token_Stream_CachingFactory
Chris@0: {
Chris@0:     /**
Chris@0:      * @var array
Chris@0:      */
Chris@14:     protected static $cache = [];
Chris@0: 
Chris@0:     /**
Chris@14:      * @param string $filename
Chris@14:      *
Chris@0:      * @return PHP_Token_Stream
Chris@0:      */
Chris@0:     public static function get($filename)
Chris@0:     {
Chris@0:         if (!isset(self::$cache[$filename])) {
Chris@0:             self::$cache[$filename] = new PHP_Token_Stream($filename);
Chris@0:         }
Chris@0: 
Chris@0:         return self::$cache[$filename];
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * @param string $filename
Chris@0:      */
Chris@0:     public static function clear($filename = null)
Chris@0:     {
Chris@0:         if (is_string($filename)) {
Chris@0:             unset(self::$cache[$filename]);
Chris@0:         } else {
Chris@14:             self::$cache = [];
Chris@0:         }
Chris@0:     }
Chris@0: }