1 files changed, 66 insertions, 0 deletions
diff --git a/framework/Caching/TGlobalStateCacheDependency.php b/framework/Caching/TGlobalStateCacheDependency.php
new file mode 100644
index 00000000..daae990e
--- /dev/null
+++ b/framework/Caching/TGlobalStateCacheDependency.php
@@ -0,0 +1,66 @@
+<?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
+ */
+
+
+/**
+ * TGlobalStateCacheDependency class.
+ *
+ * TGlobalStateCacheDependency 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 setStateName StateName} to the name of the global state.
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @package System.Caching
+ * @since 3.1.0
+ */
+class TGlobalStateCacheDependency extends TCacheDependency
+{
+	private $_stateName;
+	private $_stateValue;
+
+	/**
+	 * Constructor.
+	 * @param string the name of the global state
+	 */
+	public function __construct($name)
+	{
+		$this->setStateName($name);
+	}
+
+	/**
+	 * @return string the name of the global state
+	 */
+	public function getStateName()
+	{
+		return $this->_stateName;
+	}
+
+	/**
+	 * @param string the name of the global state
+	 * @see TApplication::setGlobalState
+	 */
+	public function setStateName($value)
+	{
+		$this->_stateName=$value;
+		$this->_stateValue=Prado::getApplication()->getGlobalState($value);
+	}
+
+	/**
+	 * Performs the actual dependency checking.
+	 * This method returns true if the specified global state is changed.
+	 * @return boolean whether the dependency is changed or not.
+	 */
+	public function getHasChanged()
+	{
+		return $this->_stateValue!==Prado::getApplication()->getGlobalState($this->_stateName);
+	}
+}
+\ No newline at end of file