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<?php
/**
* TCache and cache dependency classes.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @link http://www.pradosoft.com/
* @copyright Copyright © 2005-2014 PradoSoft
* @license http://www.pradosoft.com/license/
* @package Prado\Caching
*/
namespace Prado\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 Prado\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);
}
}
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