PreRenderComponentEvent (Java EE 8)

java.lang.Object
- java.util.EventObject
- - javax.faces.event.SystemEvent
  - - javax.faces.event.ComponentSystemEvent
    - - javax.faces.event.PreRenderComponentEvent

```
public class PreRenderComponentEvent
extends ComponentSystemEvent
```
When an instance of this event is passed to SystemEventListener.processEvent(javax.faces.event.SystemEvent) or ComponentSystemEventListener.processEvent(javax.faces.event.ComponentSystemEvent), the listener implementation may assume that the source of this event instance is the UIComponent instance that is about to be rendered and that it is safe to call UIComponent.getParent(), UIComponent.getClientId(), and other methods that depend upon the component instance being in the view.

Since:

2.0

See Also:

Serialized Form

Field Summary
- Fields inherited from class java.util.EventObject
  source

Constructor Summary

Constructors
Constructor	Description
`PreRenderComponentEvent(UIComponent component)`	Instantiate a new `PreRenderComponentEvent` that indicates the argument `component` is about to be rendered.
`PreRenderComponentEvent(FacesContext facesContext, UIComponent component)`	Instantiate a new `PreRenderComponentEvent` that indicates the argument `component` is about to be rendered.

Method Summary
- Methods inherited from class javax.faces.event.ComponentSystemEvent
  getComponent, isAppropriateListener, processListener
- Methods inherited from class java.util.EventObject
  getSource, toString
- Methods inherited from class java.lang.Object
  clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
- Methods inherited from class javax.faces.event.SystemEvent
  getFacesContext

- Constructor Detail
  - PreRenderComponentEvent
```
public PreRenderComponentEvent(UIComponent component)
```
    Instantiate a new PreRenderComponentEvent that indicates the argument component is about to be rendered.
    
    Parameters:
    
    component - the UIComponent that is about to be rendered.
    
    Throws:
    
    java.lang.IllegalArgumentException - if the argument is null.
  - PreRenderComponentEvent
```
public PreRenderComponentEvent(FacesContext facesContext,
                               UIComponent component)
```
    Instantiate a new PreRenderComponentEvent that indicates the argument component is about to be rendered.
    
    Parameters:
    
    facesContext - the Faces context.
    
    component - the UIComponent that is about to be rendered.
    
    Throws:
    
    java.lang.IllegalArgumentException - if the argument is null.