AbstractViewMediator.as

YourView.mxml
 ... xmlns:mx="library://ns.adobe.com/flex/mx" addedToStage="viewContext.dispatch(this)">
	
	<mx:Script>
		<![CDATA[ 
			import com.adams.scrum.signals.ViewSignal;
			[Inject]
			public var viewContext:ViewSignal;
		]]>
	</mx:Script>

AbstractViewMediator.as

protected var viewType:Class;

public function AbstractViewMediator(viewType:Class)
{
   super(); 
  this.viewType = viewType;
}
[MediateSignal(type="ViewSignal")]
public function setView(value:UIComponent):void
{ 
  if(value is viewType && )
  { 
    this._view = value as UIComponent;