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-rw-r--r--framework/Caching/TGlobalStateCacheDependency.php66
1 files changed, 66 insertions, 0 deletions
diff --git a/framework/Caching/TGlobalStateCacheDependency.php b/framework/Caching/TGlobalStateCacheDependency.php
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+<?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