1 files changed, 73 insertions, 0 deletions
diff --git a/framework/Caching/TFileCacheDependency.php b/framework/Caching/TFileCacheDependency.php
new file mode 100644
index 00000000..4a4694bd
--- /dev/null
+++ b/framework/Caching/TFileCacheDependency.php
@@ -0,0 +1,73 @@
+<?php
+/**
+ * TCache and cache dependency classes.
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @link http://www.pradosoft.com/
+ * @copyright Copyright &copy; 2005-2014 PradoSoft
+ * @license http://www.pradosoft.com/license/
+ * @package System.Caching
+ */
+
+
+/**
+ * TFileCacheDependency class.
+ *
+ * TFileCacheDependency performs dependency checking based on the
+ * last modification time of the file specified via {@link setFileName FileName}.
+ * The dependency is reported as unchanged if and only if the file's
+ * last modification time remains unchanged.
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @package System.Caching
+ * @since 3.1.0
+ */
+class TFileCacheDependency extends TCacheDependency
+{
+	private $_fileName;
+	private $_timestamp;
+
+	/**
+	 * Constructor.
+	 * @param string name of the file whose change is to be checked.
+	 */
+	public function __construct($fileName)
+	{
+		$this->setFileName($fileName);
+	}
+
+	/**
+	 * @return string the name of the file whose change is to be checked
+	 */
+	public function getFileName()
+	{
+		return $this->_fileName;
+	}
+
+	/**
+	 * @param string the name of the file whose change is to be checked
+	 */
+	public function setFileName($value)
+	{
+		$this->_fileName=$value;
+		$this->_timestamp=@filemtime($value);
+	}
+
+	/**
+	 * @return int the last modification time of the file
+	 */
+	public function getTimestamp()
+	{
+		return $this->_timestamp;
+	}
+
+	/**
+	 * Performs the actual dependency checking.
+	 * This method returns true if the last modification time of the file is changed.
+	 * @return boolean whether the dependency is changed or not.
+	 */
+	public function getHasChanged()
+	{
+		return @filemtime($this->_fileName)!==$this->_timestamp;
+	}
+}
+\ No newline at end of file