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53 lines
1.5 KiB
53 lines
1.5 KiB
<?php |
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/** |
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* CFileCacheDependency class file. |
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* |
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* @author Qiang Xue <qiang.xue@gmail.com> |
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* @link http://www.yiiframework.com/ |
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* @copyright Copyright © 2008-2011 Yii Software LLC |
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* @license http://www.yiiframework.com/license/ |
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*/ |
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/** |
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* CFileCacheDependency represents a dependency based on a file's last modification time. |
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* |
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* CFileCacheDependency performs dependency checking based on the |
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* last modification time of the file specified via {@link fileName}. |
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* The dependency is reported as unchanged if and only if the file's |
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* last modification time remains unchanged. |
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* |
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* @author Qiang Xue <qiang.xue@gmail.com> |
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* @version $Id$ |
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* @package system.caching.dependencies |
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* @since 1.0 |
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*/ |
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class CFileCacheDependency extends CCacheDependency |
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{ |
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/** |
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* @var string the name of the file whose last modification time is used to |
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* check if the dependency has been changed. |
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*/ |
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public $fileName; |
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/** |
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* Constructor. |
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* @param string $fileName name of the file whose change is to be checked. |
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*/ |
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public function __construct($fileName=null) |
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{ |
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$this->fileName=$fileName; |
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} |
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/** |
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* Generates the data needed to determine if dependency has been changed. |
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* This method returns the file's last modification time. |
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* @return mixed the data needed to determine if dependency has been changed. |
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*/ |
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protected function generateDependentData() |
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{ |
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if($this->fileName!==null) |
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return @filemtime($this->fileName); |
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else |
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throw new CException(Yii::t('yii','CFileCacheDependency.fileName cannot be empty.')); |
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} |
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}
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