1 files changed, 54 insertions, 0 deletions
diff --git a/framework/caching/dependencies/CGlobalStateCacheDependency.php b/framework/caching/dependencies/CGlobalStateCacheDependency.php
new file mode 100644
index 0000000..4775fc6
--- /dev/null
+++ b/framework/caching/dependencies/CGlobalStateCacheDependency.php
@@ -0,0 +1,54 @@
+<?php
+/**
+ * CGlobalStateCacheDependency class file.
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright &copy; 2008-2011 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
+
+/**
+ * CGlobalStateCacheDependency represents a dependency based on a global state value.
+ *
+ * CGlobalStateCacheDependency checks if a global state is changed or not.
+ * If the global state is changed, the dependency is reported as changed.
+ * To specify which global state this dependency should check with,
+ * set {@link stateName} to the name of the global state.
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @version $Id: CGlobalStateCacheDependency.php 2799 2011-01-01 19:31:13Z qiang.xue $
+ * @package system.caching.dependencies
+ * @since 1.0
+ */
+class CGlobalStateCacheDependency extends CCacheDependency
+{
+	/**
+	 * @var string the name of the global state whose value is to check
+	 * if the dependency has changed.
+	 * @see CApplication::setGlobalState
+	 */
+	public $stateName;
+
+	/**
+	 * Constructor.
+	 * @param string $name the name of the global state
+	 */
+	public function __construct($name=null)
+	{
+		$this->stateName=$name;
+	}
+
+	/**
+	 * Generates the data needed to determine if dependency has been changed.
+	 * This method returns the value of the global state.
+	 * @return mixed the data needed to determine if dependency has been changed.
+	 */
+	protected function generateDependentData()
+	{
+		if($this->stateName!==null)
+			return Yii::app()->getGlobalState($this->stateName);
+		else
+			throw new CException(Yii::t('yii','CGlobalStateCacheDependency.stateName cannot be empty.'));
+	}
+}