scaffold.libs_as.org.osflash.signals.Promise.as Maven / Gradle / Ivy
package org.osflash.signals
{
import flash.errors.IllegalOperationError;
import org.osflash.signals.ISlot;
import org.osflash.signals.OnceSignal;
public class Promise extends OnceSignal
{
private var isDispatched : Boolean;
private var valueObjects : Array;
/** @inheritDoc */
override public function addOnce( listener : Function ) : ISlot
{
var slot : ISlot = super.addOnce( listener );
if( isDispatched )
{
slot.execute( valueObjects );
slot.remove();
}
return slot;
}
/**
* @inheritDoc
* @throws flash.errors.IllegalOperationError IllegalOperationError: You cannot dispatch() a Promise more than once
*/
override public function dispatch( ...valueObjects ) : void
{
if( isDispatched )
{
throw new IllegalOperationError( "You cannot dispatch() a Promise more than once" );
}
else
{
isDispatched = true;
this.valueObjects = valueObjects;
super.dispatch.apply( this, valueObjects );
}
}
}
}