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99 lines
2.6 KiB
99 lines
2.6 KiB
14 years ago
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<?php
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/**
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* CChainedCacheDependency class file.
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*
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* @author Qiang Xue <qiang.xue@gmail.com>
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* @link http://www.yiiframework.com/
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* @copyright Copyright © 2008-2011 Yii Software LLC
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* @license http://www.yiiframework.com/license/
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*/
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/**
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* CChainedCacheDependency represents a list of cache dependencies.
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*
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* If any of the dependencies reports a dependency change, CChainedCacheDependency
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* will return true for the checking.
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*
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* To add dependencies to CChainedCacheDependency, use {@link getDependencies Dependencies}
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* which gives a {@link CTypedList} instance and can be used like an array
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* (see {@link CList} for more details}).
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*
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* @property CTypedList $dependencies List of dependency objects.
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* @property boolean $hasChanged Whether the dependency is changed or not.
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*
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* @author Qiang Xue <qiang.xue@gmail.com>
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* @version $Id$
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* @package system.caching.dependencies
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* @since 1.0
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*/
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class CChainedCacheDependency extends CComponent implements ICacheDependency
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{
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private $_dependencies=null;
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/**
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* Constructor.
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* @param array $dependencies the dependencies to be added to this chain.
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* @since 1.1.4
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*/
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public function __construct($dependencies=array())
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{
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if(!empty($dependencies))
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$this->setDependencies($dependencies);
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}
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/**
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* @return CTypedList list of dependency objects
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*/
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public function getDependencies()
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{
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if($this->_dependencies===null)
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$this->_dependencies=new CTypedList('ICacheDependency');
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return $this->_dependencies;
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}
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/**
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* @param array $values list of dependency objects or configurations to be added to this chain.
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* If a depedency is specified as a configuration, it must be an array that can be recognized
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* by {@link YiiBase::createComponent}.
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*/
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public function setDependencies($values)
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{
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$dependencies=$this->getDependencies();
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foreach($values as $value)
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{
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if(is_array($value))
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$value=Yii::createComponent($value);
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$dependencies->add($value);
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}
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}
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/**
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* Evaluates the dependency by generating and saving the data related with dependency.
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*/
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public function evaluateDependency()
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{
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if($this->_dependencies!==null)
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{
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foreach($this->_dependencies as $dependency)
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$dependency->evaluateDependency();
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}
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}
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/**
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* Performs the actual dependency checking.
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* This method returns true if any of the dependency objects
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* reports a dependency change.
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* @return boolean whether the dependency is changed or not.
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*/
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public function getHasChanged()
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{
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if($this->_dependencies!==null)
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{
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foreach($this->_dependencies as $dependency)
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if($dependency->getHasChanged())
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return true;
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}
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return false;
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}
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}
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