TApplicationComponent is the base class for all components that are
application-related, such as controls, modules, services, etc.
TApplicationComponent mainly defines a few properties that are shortcuts
to some commonly used methods. The {@link getApplication Application}
property gives the application instance that this component belongs to;
{@link getService Service} gives the current running service;
{@link getRequest Request}, {@link getResponse Response} and {@link getSession Session}
return the request and response modules, respectively;
And {@link getUser User} gives the current user instance.
Besides, TApplicationComponent defines two shortcut methods for
publishing private files: {@link publishAsset} and {@link publishFilePath}.
/**
* Checks for the existance of a property value by name or a control by ID.
* This overrides the parent implementation by allowing checking for the
* existance of a control via its ID using the following syntax,
* <code>
* $menuBarExists = isset($this->menuBar);
* </code>
* 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.
* Note, the control must be configured in the template
* with explicit ID. If the name matches both a property and a control ID,
* the control ID will take the precedence.
*
* @param string the property name or control ID
* @return bool wether the control or property exists
* @see __get
*/
public function __isset($name)
{
if (isset($this->_rf[self::RF_NAMED_OBJECTS][$name])) {
return true;
} else {
return parent::__isset($name);
}
}
