if ( dataSet == null )
Iterator iter = inputParameterGroup.getParameters( ).iterator( ); if ( !iter.hasNext( ) )
	private void updateButtons( )	{		boolean okEnable = true;		if ( dataSet == null )		{			okEnable = false;		}		else		{			Iterator iter = inputParameterGroup.getParameters( ).iterator( );			if ( !iter.hasNext( ) )			{				okEnable = false;			}			else			{				int count = 0;				while ( iter.hasNext( ) )				{					Object obj = iter.next( );					if ( obj instanceof ScalarParameterHandle )					{						ScalarParameterHandle param = (ScalarParameterHandle) obj;						count++;						if ( param.getValueExpr( ) == null )						{							okEnable = false;							break;						}					}				}				okEnable &= ( count != 0 );			}		}		getOkButton( ).setEnabled( okEnable );	}