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tags/2.0.0-beta
Qiang Xue 14 years ago
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4 changed files with 306 additions and 289 deletions
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  1. 10
      framework/base/Behavior.php
  2. 550
      framework/base/Component.php
  3. 24
      framework/base/Event.php
  4. 11
      framework/base/Exception.php

10
framework/base/Behavior.php
Unescape View File

@ -1,8 +1,16 @@
<?php
/**
* Behavior class file.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @link http://www.yiiframework.com/
* @copyright Copyright &copy; 2008-2012 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
namespace yii\base;
class CBehavior extends CComponent implements IBehavior
class Behavior extends Component
{
private $_enabled;
private $_owner;

550
framework/base/Component.php
Unescape View File

@ -68,7 +68,7 @@ namespace yii\base;
* public function foo($event) { ... }
* ~~~
*
* where `$event` is an [[Event]] object which includes parameters associated with the event.
* where `$event` is an [[Event]] object which includes parameters associated with the event.
*
* To attach an event handler to an event, call [[attachEventHandler]].
* Alternatively, you can also do the following:
@ -89,26 +89,21 @@ namespace yii\base;
*
* Both property names and event names are *case-insensitive*.
*
* A behavior is an object implementing the [[IBehavior]] interface. It is usually attached
* to a component instance of {@link IBehavior} which is attached to a component. The methods of
* the behavior can be invoked as if they belong to the component. Multiple behaviors
* can be attached to the same component.
* A behavior is an instance of [[Behavior]] or its child class. When a behavior is
* attached to a component, its public properties and methods can be accessed via the
* component directly, as if the component owns those properties and methods. For example,
*
* To attach a behavior to a component, call {@link attachBehavior}; and to detach the behavior
* from the component, call {@link detachBehavior}.
* Multiple behaviors can be attached to the same component.
*
* A behavior can be temporarily enabled or disabled by calling {@link enableBehavior}
* or {@link disableBehavior}, respectively. When disabled, the behavior methods cannot
* be invoked via the component.
* To attach a behavior to a component, call [[attachBehavior]]; and to detach the behavior
* from the component, call [[detachBehavior]].
*
* Starting from version 1.1.0, a behavior's properties (either its public member variables or
* its properties defined via getters and/or setters) can be accessed through the component it
* is attached to.
* A behavior can be temporarily enabled or disabled by calling [[enableBehavior]] or
* [[disableBehavior]], respectively. When disabled, the behavior's public properties and methods
* cannot be accessed via the component.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @version $Id: Component.php 3204 2011-05-05 21:36:32Z alexander.makarow $
* @package system.base
* @since 1.0
* @since 2.0
*/
class Component
{
@ -116,16 +111,20 @@ class Component
private $_b;
/**
* Returns a property value, an event handler list or a behavior based on its name.
* Do not call this method. This is a PHP magic method that we override
* to allow using the following syntax to read a property or obtain event handlers:
* <pre>
* $value=$component->propertyName;
* $handlers=$component->eventName;
* </pre>
* @param string $name the property name or event name
* @return mixed the property value, event handlers attached to the event, or the named behavior (since version 1.0.2)
* @throws CException if the property or event is not defined
* Returns the value of a component property.
* This method will check in the following order and act accordingly:
*
* - a property defined by a getter: return the getter result
* - an event: return a vector containing the attached event handlers
* - a behavior: return the behavior object
* - a property of a behavior: return the behavior property value
*
* Do not call this method directly as it is a PHP magic method that
* will be implicitly called when executing `$value = $component->property;`.
* @param string $name the property name
* @return mixed the property value, event handlers attached to the event,
* the named behavior, or the value of a behavior's property
* @throws Exception if the property is not defined
* @see __set
*/
public function __get($name)
@ -156,15 +155,17 @@ class Component
/**
* Sets value of a component property.
* Do not call this method. This is a PHP magic method that we override
* to allow using the following syntax to set a property or attach an event handler
* <pre>
* $this->propertyName=$value;
* $this->eventName=$callback;
* </pre>
* This method will check in the following order and act accordingly:
*
* - a property defined by a setter: set the property value
* - an event: attach the handler to the event
* - a property of a behavior: set the behavior property value
*
* Do not call this method directly as it is a PHP magic method that
* will be implicitly called when executing `$component->property = $value;`.
* @param string $name the property name or the event name
* @param mixed $value the property value or callback
* @throws CException if the property/event is not defined or the property is read only.
* @param mixed $value the property value
* @throws Exception if the property is not defined or read-only.
* @see __get
*/
public function __set($name, $value)
@ -197,10 +198,16 @@ class Component
/**
* Checks if a property value is null.
* Do not call this method. This is a PHP magic method that we override
* to allow using isset() to detect if a component property is set or not.
* This method will check in the following order and act accordingly:
*
* - a property defined by a setter: return whether the property value is null
* - an event: return whether the event has any handler attached
* - a property of a behavior: return whether the property value is null
*
* Do not call this method directly as it is a PHP magic method that
* will be implicitly called when executing `isset($component->property)`.
* @param string $name the property name or the event name
* @since 1.0.1
* @return boolean whether the named property is null
*/
public function __isset($name)
{
@ -227,11 +234,16 @@ class Component
/**
* Sets a component property to be null.
* Do not call this method. This is a PHP magic method that we override
* to allow using unset() to set a component property to be null.
* @param string $name the property name or the event name
* @throws CException if the property is read only.
* @since 1.0.1
* This method will check in the following order and act accordingly:
*
* - a property defined by a setter: set the property value to be null
* - an event: remove all attached event handlers
* - a property of a behavior: set the property value to be null
*
* Do not call this method directly as it is a PHP magic method that
* will be implicitly called when executing `unset($component->property)`.
* @param string $name the property name
* @throws Exception if the property is read only.
*/
public function __unset($name)
{
@ -264,171 +276,40 @@ class Component
/**
* Calls the named method which is not a class method.
* Do not call this method. This is a PHP magic method that we override
* to implement the behavior feature.
* If the name refers to a component property whose value is
* an anonymous function, the method will execute the function.
* Otherwise, it will check if any attached behavior has
* the named method and will execute it if available.
*
* Do not call this method directly as it is a PHP magic method that
* will be implicitly called when an unknown method is being invoked.
* @param string $name the method name
* @param array $parameters method parameters
* @return mixed the method return value
* @since 1.0.2
*/
public function __call($name, $parameters)
{
if ($this->_b !== null)
{
foreach ($this->_b as $object)
{
if ($object->getEnabled() && method_exists($object, $name)) {
return call_user_func_array(array($object, $name), $parameters);
}
}
}
if ($this->canGetProperty($name)) {
$func = $this->$name;
if ($func instanceof \Closure) {
return call_user_func_array($func, $parameters);
}
}
throw new Exception('Unknown method: ' . get_class($this) . '::' $name . '()');
}
/**
* Returns the named behavior object.
* The name 'asa' stands for 'as a'.
* @param string $behavior the behavior name
* @return IBehavior the behavior object, or null if the behavior does not exist
* @since 1.0.2
*/
public function asa($behavior)
{
return isset($this->_b[$behavior]) ? $this->_b[$behavior] : null;
}
/**
* Attaches a list of behaviors to the component.
* Each behavior is indexed by its name and should be an instance of
* {@link IBehavior}, a string specifying the behavior class, or an
* array of the following structure:
* <pre>
* array(
* 'class'=>'path.to.BehaviorClass',
* 'property1'=>'value1',
* 'property2'=>'value2',
* )
* </pre>
* @param array $behaviors list of behaviors to be attached to the component
* @since 1.0.2
*/
public function attachBehaviors($behaviors)
{
foreach ($behaviors as $name => $behavior)
$this->attachBehavior($name, $behavior);
}
/**
* Detaches all behaviors from the component.
* @since 1.0.2
*/
public function detachBehaviors()
{
if ($this->_b !== null)
{
foreach ($this->_b as $name => $behavior)
$this->detachBehavior($name);
$this->_b = null;
}
}
/**
* Attaches a behavior to this component.
* This method will create the behavior object based on the given
* configuration. After that, the behavior object will be initialized
* by calling its {@link IBehavior::attach} method.
* @param string $name the behavior's name. It should uniquely identify this behavior.
* @param mixed $behavior the behavior configuration. This is passed as the first
* parameter to {@link YiiBase::createComponent} to create the behavior object.
* @return IBehavior the behavior object
* @since 1.0.2
*/
public function attachBehavior($name, $behavior)
{
if (!($behavior instanceof IBehavior))
$behavior = Yii::createComponent($behavior);
$behavior->setEnabled(true);
$behavior->attach($this);
return $this->_b[$name] = $behavior;
}
/**
* Detaches a behavior from the component.
* The behavior's {@link IBehavior::detach} method will be invoked.
* @param string $name the behavior's name. It uniquely identifies the behavior.
* @return IBehavior the detached behavior. Null if the behavior does not exist.
* @since 1.0.2
*/
public function detachBehavior($name)
{
if (isset($this->_b[$name]))
{
$this->_b[$name]->detach($this);
$behavior = $this->_b[$name];
unset($this->_b[$name]);
return $behavior;
}
}
/**
* Enables all behaviors attached to this component.
* @since 1.0.2
*/
public function enableBehaviors()
{
if ($this->_b !== null)
{
foreach ($this->_b as $behavior)
$behavior->setEnabled(true);
}
}
/**
* Disables all behaviors attached to this component.
* @since 1.0.2
*/
public function disableBehaviors()
{
if ($this->_b !== null)
{
foreach ($this->_b as $behavior)
$behavior->setEnabled(false);
foreach ($this->_b as $object)
{
if ($object->getEnabled() && method_exists($object, $name)) {
return call_user_func_array(array($object, $name), $parameters);
}
}
}
throw new Exception('Unknown method: ' . get_class($this) . '::' $name . '()');
}
/**
* Enables an attached behavior.
* A behavior is only effective when it is enabled.
* A behavior is enabled when first attached.
* @param string $name the behavior's name. It uniquely identifies the behavior.
* @since 1.0.2
*/
public function enableBehavior($name)
{
if (isset($this->_b[$name]))
$this->_b[$name]->setEnabled(true);
}
/**
* Disables an attached behavior.
* A behavior is only effective when it is enabled.
* @param string $name the behavior's name. It uniquely identifies the behavior.
* @since 1.0.2
*/
public function disableBehavior($name)
{
if (isset($this->_b[$name]))
$this->_b[$name]->setEnabled(false);
}
/**
* Determines whether a property is defined.
* Returns a value indicating whether a property is defined.
* A property is defined if there is a getter or setter method
* defined in the class. Note, property names are case-insensitive.
* @param string $name the property name
@ -442,7 +323,7 @@ class Component
}
/**
* Determines whether a property can be read.
* Returns a value indicating whether a property can be read.
* A property can be read if the class has a getter method
* for the property name. Note, property name is case-insensitive.
* @param string $name the property name
@ -455,7 +336,7 @@ class Component
}
/**
* Determines whether a property can be set.
* Returns a value indicating whether a property can be set.
* A property can be written if the class has a setter method
* for the property name. Note, property name is case-insensitive.
* @param string $name the property name
@ -468,9 +349,9 @@ class Component
}
/**
* Determines whether an event is defined.
* An event is defined if the class has a method named like 'onXXX'.
* Note, event name is case-insensitive.
* Returns a value indicating whether an event is defined.
* An event is defined if the class has a method whose name starts with `on` (e.g. `onClick`).
* Note that event name is case-insensitive.
* @param string $name the event name
* @return boolean whether an event is defined
*/
@ -480,66 +361,70 @@ class Component
}
/**
* Checks whether the named event has attached handlers.
* Returns a value indicating whether there is any handler attached to the event.
* @param string $name the event name
* @return boolean whether an event has been attached one or several handlers
* @return boolean whether there is any handler attached to the event.
*/
public function hasEventHandler($name)
{
$name = strtolower($name);
return isset($this->_e[$name]) && $this->_e[$name]->getCount() > 0;
return isset($this->_e[$name]) && $this->_e[$name]->getCount();
}
/**
* Returns the list of attached event handlers for an event.
* You may manipulate the returned [[Vector]] object by adding or removing handlers.
* For example,
*
* ~~~php
* $component->getEventHandlers($eventName)->insertAt(0, $eventHandler);
* ~~~
* @param string $name the event name
* @return CList list of attached event handlers for the event
* @throws CException if the event is not defined
* @return Vector list of attached event handlers for the event
* @throws Exception if the event is not defined
*/
public function getEventHandlers($name)
{
if ($this->hasEvent($name))
{
if ($this->hasEvent($name)) {
$name = strtolower($name);
if (!isset($this->_e[$name]))
$this->_e[$name] = new CList;
if (!isset($this->_e[$name])) {
$this->_e[$name] = new Vector;
}
return $this->_e[$name];
}
else
throw new CException(Yii::t('yii', 'Event "{class}.{event}" is not defined.',
array('{class}' => get_class($this), '{event}' => $name)));
throw new Exception('Undefined event: ' . $name);
}
/**
* Attaches an event handler to an event.
*
* An event handler must be a valid PHP callback, i.e., a string referring to
* a global function name, or an array containing two elements with
* the first element being an object and the second element a method name
* of the object.
* This is equivalent to the following code:
*
* ~~~php
* $component->getEventHandlers($eventName)->add($eventHandler);
* ~~~
*
* An event handler must be a valid PHP callback. The followings are
* some examples:
*
* ~~~php
* 'handleOnClick' // handleOnClick() is a global function
* array($object, 'handleOnClick') // $object->handleOnClick()
* array('Page', 'handleOnClick') // Page::handleOnClick()
* function($event) { ... } // anonymous function
* ~~~
*
* An event handler must be defined with the following signature,
* <pre>
* function handlerName($event) {}
* </pre>
* where $event includes parameters associated with the event.
*
* This is a convenient method of attaching a handler to an event.
* It is equivalent to the following code:
* <pre>
* $component->getEventHandlers($eventName)->add($eventHandler);
* </pre>
* ~~~php
* function handlerName($event) {}
* ~~~
*
* Using {@link getEventHandlers}, one can also specify the excution order
* of multiple handlers attaching to the same event. For example:
* <pre>
* $component->getEventHandlers($eventName)->insertAt(0,$eventHandler);
* </pre>
* makes the handler to be invoked first.
* where `$event` is an [[Event]] object which includes parameters associated with the event.
*
* @param string $name the event name
* @param callback $handler the event handler
* @throws CException if the event is not defined
* @throws Exception if the event is not defined
* @see detachEventHandler
*/
public function attachEventHandler($name, $handler)
@ -549,7 +434,7 @@ class Component
/**
* Detaches an existing event handler.
* This method is the opposite of {@link attachEventHandler}.
* This method is the opposite of [[attachEventHandler]].
* @param string $name event name
* @param callback $handler the event handler to be removed
* @return boolean if the detachment process is successful
@ -557,10 +442,7 @@ class Component
*/
public function detachEventHandler($name, $handler)
{
if ($this->hasEventHandler($name))
return $this->getEventHandlers($name)->remove($handler) !== false;
else
return false;
return $this->getEventHandlers($name)->remove($handler) !== false;
}
/**
@ -568,79 +450,203 @@ class Component
* This method represents the happening of an event. It invokes
* all attached handlers for the event.
* @param string $name the event name
* @param CEvent $event the event parameter
* @throws CException if the event is undefined or an event handler is invalid.
* @param Event $event the event parameter
* @throws Exception if the event is undefined or an event handler is invalid.
*/
public function raiseEvent($name, $event)
{
$name = strtolower($name);
if (isset($this->_e[$name]))
{
foreach ($this->_e[$name] as $handler)
{
if (is_string($handler))
if (isset($this->_e[$name])) {
foreach ($this->_e[$name] as $handler) {
if (is_string($handler) || $handler instanceof \Closure) {
call_user_func($handler, $event);
elseif (is_callable($handler, true))
{
if (is_array($handler))
{
// an array: 0 - object, 1 - method name
list($object, $method) = $handler;
if (is_string($object)) // static method call
call_user_func($handler, $event);
elseif (method_exists($object, $method))
$object->$method($event);
else
throw new CException(Yii::t('yii', 'Event "{class}.{event}" is attached with an invalid handler "{handler}".',
array('{class}' => get_class($this), '{event}' => $name, '{handler}' => $handler[1])));
}
else // PHP 5.3: anonymous function
}
elseif (is_callable($handler, true)) {
// an array: 0 - object, 1 - method name
list($object, $method) = $handler;
if (is_string($object)) { // static method call
call_user_func($handler, $event);
}
elseif (method_exists($object, $method)) {
$object->$method($event);
}
else {
throw new Exception('Event "' . get_class($this) . '.' . $name . '" is attached with an invalid handler.');
}
}
else
throw new CException(Yii::t('yii', 'Event "{class}.{event}" is attached with an invalid handler "{handler}".',
array('{class}' => get_class($this), '{event}' => $name, '{handler}' => gettype($handler))));
// stop further handling if param.handled is set true
if (($event instanceof CEvent) && $event->handled)
else {
throw new Exception('Event "' . get_class($this) . '.' . $name . '" is attached with an invalid handler.');
}
// stop further handling if the event is handled
if ($event instanceof Event && $event->handled) {
return;
}
}
}
elseif (!$this->hasEvent($name)) {
throw new Exception('Undefined event: ' . get_class($this) . '.' . $name);
}
}
/**
* Returns the named behavior object.
* The name 'asa' stands for 'as a'.
* @param string $behavior the behavior name
* @return Behavior the behavior object, or null if the behavior does not exist
*/
public function asa($behavior)
{
return isset($this->_b[$behavior]) ? $this->_b[$behavior] : null;
}
/**
* Attaches a behavior to this component.
* This method will create the behavior object based on the given
* configuration. After that, the behavior object will be attached to
* this component by calling the [[Behavior::attach]] method.
* @param string $name the behavior's name. It should uniquely identify this behavior.
* @param mixed $behavior the behavior configuration. This can be one of the following:
*
* - a [[Behavior]] object
* - a string specifying the behavior class
* - an object configuration array
*
* parameter to [[\Yii::createComponent]] to create the behavior object.
* @return Behavior the behavior object
* @see detachBehavior
*/
public function attachBehavior($name, $behavior)
{
if (!($behavior instanceof Behavior)) {
$behavior = \Yii::createComponent($behavior);
}
$behavior->attach($this);
return $this->_b[$name] = $behavior;
}
/**
* Attaches a list of behaviors to the component.
* Each behavior is indexed by its name and should be a [[Behavior]] object,
* a string specifying the behavior class, or an
* configuration array for creating the behavior.
* @param array $behaviors list of behaviors to be attached to the component
* @see attachBehavior
*/
public function attachBehaviors($behaviors)
{
foreach ($behaviors as $name => $behavior) {
$this->attachBehavior($name, $behavior);
}
}
/**
* Detaches a behavior from the component.
* The behavior's [[Behavior::detach]] method will be invoked.
* @param string $name the behavior's name.
* @return Behavior the detached behavior. Null if the behavior does not exist.
*/
public function detachBehavior($name)
{
if (isset($this->_b[$name])) {
$this->_b[$name]->detach($this);
$behavior = $this->_b[$name];
unset($this->_b[$name]);
return $behavior;
}
}
/**
* Detaches all behaviors from the component.
*/
public function detachBehaviors()
{
if ($this->_b !== null) {
foreach ($this->_b as $name => $behavior) {
$this->detachBehavior($name);
}
$this->_b = null;
}
}
/**
* Enables all behaviors attached to this component.
*/
public function enableBehaviors()
{
if ($this->_b !== null) {
foreach ($this->_b as $behavior) {
$behavior->setEnabled(true);
}
}
}
/**
* Disables all behaviors attached to this component.
*/
public function disableBehaviors()
{
if ($this->_b !== null) {
foreach ($this->_b as $behavior) {
$behavior->setEnabled(false);
}
}
elseif (YII_DEBUG && !$this->hasEvent($name))
throw new CException(Yii::t('yii', 'Event "{class}.{event}" is not defined.',
array('{class}' => get_class($this), '{event}' => $name)));
}
/**
* Enables an attached behavior.
* A behavior is only effective when it is enabled.
* @param string $name the behavior's name. It uniquely identifies the behavior.
*/
public function enableBehavior($name)
{
if (isset($this->_b[$name])) {
$this->_b[$name]->setEnabled(true);
}
}
/**
* Disables an attached behavior.
* A behavior is only effective when it is enabled.
* @param string $name the behavior's name. It uniquely identifies the behavior.
*/
public function disableBehavior($name)
{
if (isset($this->_b[$name])) {
$this->_b[$name]->setEnabled(false);
}
}
/**
* Evaluates a PHP expression or callback under the context of this component.
*
* Valid PHP callback can be class method name in the form of
* array(ClassName/Object, MethodName), or anonymous function (only available in PHP 5.3.0 or above).
* array(ClassName/Object, MethodName), or anonymous function.
*
* If a PHP callback is used, the corresponding function/method signature should be
* <pre>
*
* ~~~php
* function foo($param1, $param2, ..., $component) { ... }
* </pre>
* ~~~
*
* where the array elements in the second parameter to this method will be passed
* to the callback as $param1, $param2, ...; and the last parameter will be the component itself.
* to the callback as `$param1`, `$param2`, ...; and the last parameter will be the component itself.
*
* If a PHP expression is used, the second parameter will be "extracted" into PHP variables
* that can be directly accessed in the expression. See {@link http://us.php.net/manual/en/function.extract.php PHP extract}
* for more details. In the expression, the component object can be accessed using $this.
* that can be directly accessed in the expression. See [PHP extract](http://us.php.net/manual/en/function.extract.php)
* for more details. In the expression, the component object can be accessed using `$this`.
*
* @param mixed $_expression_ a PHP expression or PHP callback to be evaluated.
* @param array $_data_ additional parameters to be passed to the above expression/callback.
* @return mixed the expression result
* @since 1.1.0
*/
public function evaluateExpression($_expression_, $_data_ = array())
public function evaluateExpression($_expression_, $_data_=array())
{
if (is_string($_expression_))
{
if (is_string($_expression_)) {
extract($_data_);
return eval('return ' . $_expression_ . ';');
}
else
{
else {
$_data_[] = $this;
return call_user_func_array($_expression_, $_data_);
}

24
framework/base/Event.php
Unescape View File

@ -1,4 +1,12 @@
<?php
/**
* Event class file.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @link http://www.yiiframework.com/
* @copyright Copyright &copy; 2008-2012 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
namespace yii\base;
@ -6,15 +14,13 @@ namespace yii\base;
* Event is the base class for all event classes.
*
* It encapsulates the parameters associated with an event.
* The {@link sender} property describes who raises the event.
* And the {@link handled} property indicates if the event is handled.
* If an event handler sets {@link handled} to true, those handlers
* that are not invoked yet will not be invoked anymore.
* The [[sender]] property describes who raises the event.
* And the [[handled]] property indicates if the event is handled.
* If an event handler sets [[handled]] to be true, the rest of the
* uninvoked handlers will be canceled.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @version $Id: CComponent.php 3001 2011-02-24 16:42:44Z alexander.makarow $
* @package system.base
* @since 1.0
* @since 2.0
*/
class Event extends Component
{
@ -24,7 +30,7 @@ class Event extends Component
public $sender;
/**
* @var boolean whether the event is handled. Defaults to false.
* When a handler sets this true, the rest of the uninvoked event handlers will not be invoked anymore.
* When a handler sets this to be true, the rest of the uninvoked event handlers will be canceled.
*/
public $handled=false;
@ -34,6 +40,6 @@ class Event extends Component
*/
public function __construct($sender=null)
{
$this->sender=$sender;
$this->sender = $sender;
}
}

11
framework/base/Exception.php
Unescape View File

@ -1,23 +1,20 @@
<?php
namespace yii\base;
/**
* Exception class file.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @link http://www.yiiframework.com/
* @copyright Copyright &copy; 2008-2011 Yii Software LLC
* @copyright Copyright &copy; 2008-2012 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
namespace yii\base;
/**
* Exception represents a generic exception for all purposes.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @version $Id: CException.php 2799 2011-01-01 19:31:13Z qiang.xue $
* @package system.base
* @since 1.0
* @since 2.0
*/
class Exception extends \Exception
{

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