API Documentation for Yii 1.1
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CFilterChain
| Package | system.web.filters |
|---|---|
| Inheritance | class CFilterChain » CList » CComponent |
| Implements | Countable, ArrayAccess, Traversable, IteratorAggregate |
| Since | 1.0 |
| Source Code | framework/web/filters/CFilterChain.php |
CFilterChain represents a list of filters being applied to an action.
CFilterChain executes the filter list by run().
CFilterChain executes the filter list by run().
Public Properties
| Property | Type | Description | Defined By |
|---|---|---|---|
| action | CAction | the action being filtered by this chain. | CFilterChain |
| controller | CController | the controller who executes the action. | CFilterChain |
| count | integer | Returns the number of items in the list. | CList |
| filterIndex | integer | the index of the filter that is to be executed when calling run(). | CFilterChain |
| iterator | Iterator | Returns an iterator for traversing the items in the list. | CList |
| readOnly | boolean | whether this list is read-only or not. | CList |
Public Methods
| Method | Description | Defined By |
|---|---|---|
| __call() | Calls the named method which is not a class method. | CComponent |
| __construct() | Constructor. | CFilterChain |
| __get() | Returns a property value, an event handler list or a behavior based on its name. | CComponent |
| __isset() | Checks if a property value is null. | CComponent |
| __set() | Sets value of a component property. | CComponent |
| __unset() | Sets a component property to be null. | CComponent |
| add() | Appends an item at the end of the list. | CList |
| asa() | Returns the named behavior object. | CComponent |
| attachBehavior() | Attaches a behavior to this component. | CComponent |
| attachBehaviors() | Attaches a list of behaviors to the component. | CComponent |
| attachEventHandler() | Attaches an event handler to an event. | CComponent |
| canGetProperty() | Determines whether a property can be read. | CComponent |
| canSetProperty() | Determines whether a property can be set. | CComponent |
| clear() | Removes all items in the list. | CList |
| contains() | CList | |
| copyFrom() | Copies iterable data into the list. | CList |
| count() | Returns the number of items in the list. | CList |
| create() | CFilterChain factory method. | CFilterChain |
| detachBehavior() | Detaches a behavior from the component. | CComponent |
| detachBehaviors() | Detaches all behaviors from the component. | CComponent |
| detachEventHandler() | Detaches an existing event handler. | CComponent |
| disableBehavior() | Disables an attached behavior. | CComponent |
| disableBehaviors() | Disables all behaviors attached to this component. | CComponent |
| enableBehavior() | Enables an attached behavior. | CComponent |
| enableBehaviors() | Enables all behaviors attached to this component. | CComponent |
| evaluateExpression() | Evaluates a PHP expression or callback under the context of this component. | CComponent |
| getCount() | Returns the number of items in the list. | CList |
| getEventHandlers() | Returns the list of attached event handlers for an event. | CComponent |
| getIterator() | Returns an iterator for traversing the items in the list. | CList |
| getReadOnly() | Returns whether this list is read-only or not. Defaults to false. | CList |
| hasEvent() | Determines whether an event is defined. | CComponent |
| hasEventHandler() | Checks whether the named event has attached handlers. | CComponent |
| hasProperty() | Determines whether a property is defined. | CComponent |
| indexOf() | CList | |
| insertAt() | Inserts an item at the specified position. | CFilterChain |
| itemAt() | Returns the item at the specified offset. | CList |
| mergeWith() | Merges iterable data into the map. | CList |
| offsetExists() | Returns whether there is an item at the specified offset. | CList |
| offsetGet() | Returns the item at the specified offset. | CList |
| offsetSet() | Sets the item at the specified offset. | CList |
| offsetUnset() | Unsets the item at the specified offset. | CList |
| raiseEvent() | Raises an event. | CComponent |
| remove() | Removes an item from the list. | CList |
| removeAt() | Removes an item at the specified position. | CList |
| run() | Executes the filter indexed at filterIndex. | CFilterChain |
| toArray() | CList |
Protected Methods
| Method | Description | Defined By |
|---|---|---|
| setReadOnly() | Sets whether this list is read-only or not | CList |
Property Details
action
property
public CAction $action;
the action being filtered by this chain.
controller
property
public CController $controller;
the controller who executes the action.
filterIndex
property
public integer $filterIndex;
the index of the filter that is to be executed when calling run().
Method Details
__construct()
method
|
public void __construct(CController $controller, CAction $action)
| ||
| $controller | CController | the controller who executes the action. |
| $action | CAction | the action being filtered by this chain. |
Source Code: framework/web/filters/CFilterChain.php#42 (show)
public function __construct($controller,$action)
{
$this->controller=$controller;
$this->action=$action;
}
Constructor.
create()
method
|
public static CFilterChain create(CController $controller, CAction $action, array $filters)
| ||
| $controller | CController | the controller who executes the action. |
| $action | CAction | the action being filtered by this chain. |
| $filters | array | list of filters to be applied to the action. |
| {return} | CFilterChain | |
Source Code: framework/web/filters/CFilterChain.php#57 (show)
public static function create($controller,$action,$filters)
{
$chain=new CFilterChain($controller,$action);
$actionID=$action->getId();
foreach($filters as $filter)
{
if(is_string($filter)) // filterName [+|- action1 action2]
{
if(($pos=strpos($filter,'+'))!==false || ($pos=strpos($filter,'-'))!==false)
{
$matched=preg_match("/\b{$actionID}\b/i",substr($filter,$pos+1))>0;
if(($filter[$pos]==='+')===$matched)
$filter=CInlineFilter::create($controller,trim(substr($filter,0,$pos)));
}
else
$filter=CInlineFilter::create($controller,$filter);
}
elseif(is_array($filter)) // array('path.to.class [+|- action1, action2]','param1'=>'value1',...)
{
if(!isset($filter[0]))
throw new CException(Yii::t('yii','The first element in a filter configuration must be the filter class.'));
$filterClass=$filter[0];
unset($filter[0]);
if(($pos=strpos($filterClass,'+'))!==false || ($pos=strpos($filterClass,'-'))!==false)
{
$matched=preg_match("/\b{$actionID}\b/i",substr($filterClass,$pos+1))>0;
if(($filterClass[$pos]==='+')===$matched)
$filterClass=trim(substr($filterClass,0,$pos));
else
continue;
}
$filter['class']=$filterClass;
$filter=Yii::createComponent($filter);
}
if(is_object($filter))
{
$filter->init();
$chain->add($filter);
}
}
return $chain;
}
CFilterChain factory method. This method creates a CFilterChain instance.
insertAt()
method
|
public void insertAt(integer $index, mixed $item)
| ||
| $index | integer | the specified position. |
| $item | mixed | new item |
Source Code: framework/web/filters/CFilterChain.php#111 (show)
public function insertAt($index,$item)
{
if($item instanceof IFilter)
parent::insertAt($index,$item);
else
throw new CException(Yii::t('yii','CFilterChain can only take objects implementing the IFilter interface.'));
}
Inserts an item at the specified position. This method overrides the parent implementation by adding additional check for the item to be added. In particular, only objects implementing IFilter can be added to the list.
run()
method
|
public void run()
|
Source Code: framework/web/filters/CFilterChain.php#125 (show)
public function run()
{
if($this->offsetExists($this->filterIndex))
{
$filter=$this->itemAt($this->filterIndex++);
Yii::trace('Running filter '.($filter instanceof CInlineFilter ? get_class($this->controller).'.filter'.$filter->name.'()':get_class($filter).'.filter()'),'system.web.filters.CFilterChain');
$filter->filter($this);
}
else
$this->controller->runAction($this->action);
}
Executes the filter indexed at filterIndex. After this method is called, filterIndex will be automatically incremented by one. This method is usually invoked in filters so that the filtering process can continue and the action can be executed.
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